Annotation of loncom/homework/structuretags.pm, revision 1.501

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.501   ! foxr        4: # $Id: structuretags.pm,v 1.500 2011/12/27 20:13:22 foxr 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();
1.500     foxr       64: use Apache::loncommon();
1.267     albertel   65: use Time::HiRes qw( gettimeofday tv_interval );
1.356     www        66: use lib '/home/httpd/lib/perl/';
                     67: use LONCAPA;
                     68:  
1.78      harris41   69: BEGIN {
1.469     www        70:     &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   71: }
                     72: 
1.500     foxr       73: 
                     74: #---------------------------------------------------------------------------------
                     75: # 
                     76: #  This section of code deals with hyphenation management.
                     77: #  We must do three things:
                     78: #  - keep track fo the desired languages to alter the header.
                     79: #  - provide hyphenation selection as needed by each language that appears in the
                     80: #    text.
                     81: #  - Provide the header text needed to make available the desired hyphenations.
                     82: #
                     83: #
                     84: 
                     85: # Hash whose keys are the languages encountered in the document/resource.
                     86: #
                     87: 
                     88: my %languages_required;
                     89: ##
                     90: #   Given a language selection as input returns a chunk of LaTeX that
                     91: #   selects the required hyphenator.
                     92: #
                     93: #  @param language - the language being selected.
                     94: #  @return string
                     95: #  @retval The LaTeX needed to select the hyphenation appropriate to the language. 
                     96: #   
                     97: sub select_hyphenation {
                     98:     my $language  = shift;
                     99: 
                    100:     $language = &Apache::loncommon::latexlanguage($language); # Translate -> latex language.
                    101: 
                    102:     # If there is no latex language there's not much we can do:
                    103: 
                    104:     if ($language) {
                    105: 	&require_language($language);
                    106: 	my $babel_hyphenation = "\\selectlanguage{$language}";
                    107: 	
                    108: 	return $babel_hyphenation;
                    109:     } else {
                    110: 	return '';
                    111:     }
                    112: }
                    113: ##
                    114: # Selects hyphenation based on the current problem metadata.
                    115: # This requires that
                    116: # - There is a language metadata item set for the problem.
                    117: # - The language has a latex/babel hyphenation.
                    118: #
                    119: # @note: Uses &Apache::lonxml::request to locate the Uri associated with
                    120: #        this problem.
                    121: # @return string (possibly empty).
                    122: # @retval If not empty an appropriate \selectlanguage{} directive.
                    123: #
                    124: sub select_metadata_hyphenation {
                    125:     my $uri      = $Apache::lonxml::request->uri;
                    126:     my $language = &Apache::lonnet::metadata($uri, 'language'); 
                    127:     my $latex_language = &Apache::loncommon::latexhyphenation($language);
                    128:     if ($latex_language) {
                    129: 	return '\selectlanguage{'.$latex_language."}\n";
                    130:     }
                    131:     return '';			# no latex hyphenation or no lang metadata.
                    132: }
                    133: 
                    134: 
                    135: ##
                    136: #  Clears the set of languages required by the document being rendered.
                    137: #
                    138: sub clear_required_languages {
                    139:     %languages_required = ();
                    140: }
                    141: ##
                    142: # Allows an external client of this module to register a need for a language:
                    143: #
                    144: # @param LaTeX language required:
                    145: #
                    146: sub require_language {
                    147:     my $language = shift;
                    148:     $languages_required{$language} = 1;
                    149: }
                    150: 
                    151: ##
                    152: # Provides the header for babel that indicates the languages
                    153: # the document requires.
                    154: # @return string
                    155: # @retval \usepackage[lang1,lang2...]{babel}
                    156: # @retval ''   if there are no languages_required.
                    157: sub languages_header {
                    158:     my $header    ='';
                    159:     my @languages = (keys(%languages_required));
                    160: 
                    161:     # Only generate the header if there are languages:
                    162: 
                    163:     if (scalar @languages) {
                    164: 	my $language_list = join(',', (@languages));
                    165: 	$header  = '\usepackage['.$language_list."]{babel}\n";
                    166:     }
                    167:     return $header;
                    168: }
                    169: 
                    170: #----------------------------------------------------------------------------------
                    171: 
1.10      albertel  172: sub start_web {
1.326     albertel  173:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.383     albertel  174:     if ($target ne 'edit' && $target ne 'modified') {
                    175: 	my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
                    176: 	if ($target eq 'web' || $target eq 'webgrade') {
                    177: 	    return $bodytext;
                    178: 	}
                    179:     } elsif ($target eq "edit" ) {
                    180: 	my $bodytext = 
                    181: 	    &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
                    182: 	my $result = &Apache::edit::tag_start($target,$token);
                    183: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                    184: 	return $result;
                    185:     } elsif ( $target eq "modified" ) {
                    186: 	return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
1.159     albertel  187:     }
                    188:     return '';
1.10      albertel  189: }
                    190: 
                    191: sub end_web {
1.44      ng        192:     return '';
1.10      albertel  193: }
                    194: 
                    195: sub start_tex {
1.326     albertel  196:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.198     sakharuk  197:     my $result='';
1.383     albertel  198:     if ($target ne 'edit' && $target ne 'modified') {
                    199: 	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
                    200: 	if ($target eq 'tex') {
1.434     foxr      201: 	    
                    202: 	    # If inside a table, occurrences of \\ must be removed;
                    203: 	    # else the table blows up.
                    204: 
                    205: 	    if (&Apache::londefdef::is_inside_of($tagstack, "table")) {
                    206: 		$bodytext =~ s/\\\\//g;
                    207: 	    }
1.432     foxr      208: 	    return $bodytext.'{}';
1.383     albertel  209: 	}
                    210:     } elsif ($target eq "edit" ) {
                    211: 	my $bodytext = 
                    212: 	    &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
                    213: 	my $result = &Apache::edit::tag_start($target,$token);
                    214: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                    215: 	return $result;
                    216:     } elsif ( $target eq "modified" ) {
                    217: 	return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
1.159     albertel  218:     }
1.198     sakharuk  219:     return $result;;
1.10      albertel  220: }
                    221: 
                    222: sub end_tex {
1.44      ng        223:     return '';
1.9       albertel  224: }
                    225: 
1.400     albertel  226: sub homework_js {
                    227:     return &Apache::loncommon::resize_textarea_js().
1.416     raeburn   228:            &setmode_javascript().
1.400     albertel  229: 	<<'JS';
                    230: <script type="text/javascript">
1.483     raeburn   231: // <![CDATA[
1.494     raeburn   232: function setSubmittedPart (part,prefix) {
                    233:     if (typeof(prefix) == 'undefined') {
                    234:         this.document.lonhomework.submitted.value="part_"+part;
                    235:     } else {
                    236:         for (var i=0;i<this.document.lonhomework.elements.length;i++) {
                    237:             if (this.document.lonhomework.elements[i].name == prefix+'submitted') {
                    238:                 this.document.lonhomework.elements[i].value="part_"+part;
                    239:             }
                    240:         }
                    241:     }
1.400     albertel  242: }
                    243: 
                    244: function image_response_click (which, e) {
                    245:     init_geometry();
                    246:     if (!e) { e = window.event; } //IE
                    247:     var input_element = document.lonhomework.elements[which];
1.401     albertel  248:     var token_element = document.lonhomework.elements[which+'_token'];
1.400     albertel  249:     var token = token_element.value;
1.401     albertel  250:     var img_element   = document.getElementById(which+'_imageresponse');
1.400     albertel  251:     var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
                    252:     var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
                    253:     var click = x+':'+y;
                    254:     input_element.value = click;
1.485     raeburn   255:     img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
1.400     albertel  256: }
1.483     raeburn   257: // ]]>
1.400     albertel  258: </script>
                    259: JS
                    260: }
                    261: 
1.416     raeburn   262: sub setmode_javascript {
                    263:     return <<"ENDSCRIPT";
                    264: <script type="text/javascript">
1.485     raeburn   265: // <![CDATA[
1.416     raeburn   266: function setmode(form,probmode) {
                    267:     form.problemmode.value = probmode;
                    268:     form.submit();
                    269: }
1.485     raeburn   270: // ]]>
1.416     raeburn   271: </script>
                    272: ENDSCRIPT
                    273: }
                    274: 
1.48      albertel  275: sub page_start {
1.345     albertel  276:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                    277: 	$extra_head)=@_;
1.159     albertel  278:     my %found;
1.207     albertel  279:     foreach my $taginside (@$tagstack) {
1.159     albertel  280: 	foreach my $taglookedfor ('html','body','form') {
                    281: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    282: 	}
                    283:     }
                    284: 
1.343     albertel  285:     if ($target eq 'tex') {
                    286: 	return
                    287: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                    288: 					   $parstack,$parser,$safeeval);
                    289:     }
                    290: 
1.474     raeburn   291:     $extra_head .= &homework_js().
                    292:                    &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
                    293:     if (&Apache::lonhtmlcommon::htmlareabrowser()) {
                    294:         my %textarea_args = (
                    295:                                 dragmath => 'math',
                    296:                               );
                    297:         $extra_head .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
1.425     raeburn   298:     }
1.478     raeburn   299:     my $is_task = ($env{'request.uri'} =~ /\.task$/);
1.493     raeburn   300:     my $needs_upload;
1.495     raeburn   301:     my ($symb)= &Apache::lonnet::whichuser();
                    302:     my ($map,$resid,$resurl)=&Apache::lonnet::decode_symb($symb);
1.478     raeburn   303:     if ($is_task) {
1.495     raeburn   304:         $extra_head .= &Apache::lonhtmlcommon::file_submissionchk_js();
1.493     raeburn   305:     } else {
                    306:         if (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.uploadedfiletypes") ne '') {
1.495     raeburn   307:             unless ($env{'request.state'} eq 'construct') {
                    308:                 my $navmap = Apache::lonnavmaps::navmap->new();
                    309:                 if (ref($navmap)) {
                    310:                     my $mapres = $navmap->getResourceByUrl($map);
1.496     raeburn   311:                     my $is_page;
                    312:                     if (ref($mapres)) {
                    313:                         $is_page = $mapres->is_page();
                    314:                     }
                    315:                     unless ($is_page) {
1.495     raeburn   316:                         $needs_upload = 1;
                    317:                     }
                    318:                 }
                    319:             }
1.493     raeburn   320:         } else {
                    321:             unless ($env{'request.state'} eq 'construct') {
                    322:                 my $navmap = Apache::lonnavmaps::navmap->new();
                    323:                 if (ref($navmap)) {
1.495     raeburn   324:                     my $mapres = $navmap->getResourceByUrl($map);
1.496     raeburn   325:                     my $is_page;
                    326:                     if (ref($mapres)) {
                    327:                         $is_page = $mapres->is_page();
                    328:                     }
                    329:                     unless ($is_page) {
1.495     raeburn   330:                         my $res = $navmap->getBySymb($symb);
                    331:                         if (ref($res)) {
                    332:                             my $partlist = $res->parts();
                    333:                             if (ref($partlist) eq 'ARRAY') {
                    334:                                 foreach my $part (@{$partlist}) {
                    335:                                     my @types = $res->responseType($part);
                    336:                                     my @ids = $res->responseIds($part);
                    337:                                     for (my $i=0; $i < scalar(@ids); $i++) {
                    338:                                         if ($types[$i] eq 'essay') {
                    339:                                             my $partid = $part.'_'.$ids[$i];
                    340:                                             if (&Apache::lonnet::EXT("resource.$partid.uploadedfiletypes") ne '') {
                    341:                                                 $needs_upload = 1;
                    342:                                                 last;
                    343:                                             }
1.493     raeburn   344:                                         }
                    345:                                     }
                    346:                                 }
1.495     raeburn   347:                             } 
                    348:                         }
1.493     raeburn   349:                     }
                    350:                 }
                    351:             }
                    352:         }
1.495     raeburn   353:         if ($needs_upload) {
                    354:             $extra_head .= &Apache::lonhtmlcommon::file_submissionchk_js();
                    355:         }
1.478     raeburn   356:     }
1.425     raeburn   357: 
1.344     albertel  358:     my %body_args;
                    359:     if (defined($found{'html'})) {
                    360: 	$body_args{'skip_phases'}{'head'}=1;
                    361:     } else {
1.343     albertel  362: 	
1.345     albertel  363: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel  364: 
1.379     albertel  365: 	$extra_head .= &Apache::londefdef::generate_css_links();
                    366: 
1.384     albertel  367: 	if ($env{'request.state'} eq 'construct') {
1.343     albertel  368: 	    $extra_head.=&Apache::edit::js_change_detection().
                    369: 		"<script type=\"text/javascript\">\n".
                    370: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    371: 		&Apache::loncommon::browser_and_searcher_javascript().
                    372:                 "\n</script>\n";
                    373: 	}
1.159     albertel  374:     }
1.343     albertel  375: 
1.446     bisitz    376:     my $pageheader = '';
1.344     albertel  377:     if (defined($found{'body'})) {
                    378: 	$body_args{'skip_phases'}{'body'}=1;
                    379:     } elsif (!defined($found{'body'}) 
                    380: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  381: 	if ($target eq 'web' || $target eq 'edit') {
1.450     bisitz    382:         # Breadcrumbs for Construction Space
                    383:         &Apache::lonhtmlcommon::clear_breadcrumbs();
                    384:         &Apache::lonhtmlcommon::add_breadcrumb({
                    385:             'text'  => 'Construction Space',
1.497     raeburn   386:             'href'  => &Apache::loncommon::authorspace($env{'request.uri'}),
1.450     bisitz    387:         });
1.460     droeschl  388:         # breadcrumbs (and tools) will be created 
                    389:         # in start_page->bodytag->innerregister
                    390: 
1.450     bisitz    391: # FIXME Where are we?
                    392: #        &Apache::lonhtmlcommon::add_breadcrumb({
                    393: #            'text'  => 'Problem Editing', # 'Problem Testing'
                    394: #            'href'  => '',
                    395: #        });
1.460     droeschl  396:         $pageheader =&Apache::loncommon::head_subbox(
1.446     bisitz    397:                 &Apache::loncommon::CSTR_pageheader());
1.297     albertel  398: 	}
1.272     albertel  399:     } elsif (!defined($found{'body'})) {
1.343     albertel  400: 	my %add_entries;
1.159     albertel  401: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    402: 						  $safeeval);
1.343     albertel  403: 	if ($background ne '' ) {
                    404: 	    $add_entries{'background'} = $background;
                    405: 	}
1.344     albertel  406: 
1.290     albertel  407: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    408: 					       $safeeval);
1.446     bisitz    409:         if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
1.344     albertel  410: 
1.446     bisitz    411:         $body_args{'bgcolor'}        = $bgcolor;
                    412:         # $body_args{'no_title'}       = 1;
                    413:         $body_args{'force_register'} = 1;
                    414:         $body_args{'add_entries'}    = \%add_entries;
1.466     droeschl  415:         if ( $env{'request.state'} eq   'construct') {
1.446     bisitz    416:             $body_args{'only_body'}  = 1;
                    417:         }
1.344     albertel  418:     }
1.365     albertel  419:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  420:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    421: 						    \%body_args);
1.446     bisitz    422:     $page_start .= $pageheader;
1.462     raeburn   423:     if (!defined($found{'body'}) 
                    424: 	&& $env{'request.state'} ne 'construct'
                    425: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    426: 
                    427: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
                    428:         if ($symb eq '' && !$publicuser) {
                    429:             $page_start .= '<p class="LC_info">'
                    430:                           .&mt('Browsing resource, all submissions are temporary.')
                    431:                           .'</p>';
1.457     bisitz    432:         }
1.344     albertel  433:     }
                    434: 
1.409     albertel  435:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  436: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  437:     }
                    438:     my $form_tag_start;
                    439:     if (!defined($found{'form'})) {
1.337     albertel  440: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.465     raeburn   441: 	my $uri = &Apache::loncommon::inhibit_menu_check(
1.455     droeschl  442:                 &Apache::lonenc::check_encrypt($env{'request.uri'}));
1.464     raeburn   443:         $uri = &HTML::Entities::encode($uri,'<>&"');
1.327     albertel  444: 	$form_tag_start.=$uri.'" ';
                    445: 	if ($target eq 'edit') {
                    446: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    447: 	}
1.493     raeburn   448:         my ($symb,$courseid,$udom,$uname)=&Apache::lonnet::whichuser();
                    449:         my ($path,$multiresp) = 
                    450:             &Apache::loncommon::get_turnedin_filepath($symb,$uname,$udom);
1.495     raeburn   451:         if (($is_task) || ($needs_upload)) {
                    452:             $form_tag_start .= ' onsubmit="return file_submission_check(this,'."'$path','$multiresp'".');"';
1.478     raeburn   453:         }
1.368     albertel  454: 	$form_tag_start.='>'."\n";
1.355     albertel  455: 
                    456: 	my $symb=&Apache::lonnet::symbread();
                    457: 	if ($symb =~ /\S/) {
                    458: 	    $symb=
                    459: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    460: 	    $form_tag_start.=
1.368     albertel  461: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  462: 	}
1.159     albertel  463:     }
1.343     albertel  464:     return ($page_start,$form_tag_start);
1.105     albertel  465: }
                    466: 
1.141     matthew   467: #use Time::HiRes();
1.105     albertel  468: sub get_resource_name {
1.159     albertel  469:     my ($parstack,$safeeval)=@_;
1.388     foxr      470:     my $name;
1.204     albertel  471:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      472: 	$name = $Apache::lonhomework::name;
                    473:     } else {
                    474: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  475: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      476: 	if ($name eq '') {
                    477: 	    $name=&Apache::lonnet::EXT('resource.title');
                    478: 	    if ($name eq 'con_lost') { $name = ''; }
                    479: 	}
                    480: 	if ($name!~/\S+/) {
                    481: 	    $name=$env{'request.uri'};
                    482: 	    $name=~s-.*/([^/]+)$-$1-;
                    483: 	}
                    484: 	# The name has had html tags escaped:
                    485:        
                    486: 	$name=~s/&lt;/</gs;
                    487: 	$name=~s/&gt;/>/gs;
                    488: 
                    489: 	$Apache::lonhomework::name=$name;
1.204     albertel  490:     }
1.159     albertel  491:     return $name;
1.105     albertel  492: }
                    493: 
                    494: sub setup_rndseed {
1.479     raeburn   495:     my ($safeeval,$target)=@_;
1.367     albertel  496:     my ($symb)=&Apache::lonnet::whichuser();
1.479     raeburn   497:     my ($questiontype,$set_safespace,$rndseed);
                    498:     if ($target eq 'analyze') {
                    499:         $questiontype = $env{'form.grade_questiontype'};
                    500:     }
                    501:     unless (defined($questiontype)) {
                    502:         $questiontype = $Apache::lonhomework::type;
                    503:     }
1.333     albertel  504:     if ($env{'request.state'} eq "construct" 
                    505: 	|| $symb eq '' 
                    506: 	|| $Apache::lonhomework::type eq 'practice'
                    507: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       508: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  509: 						['rndseed']);
1.284     albertel  510: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  511: 	if (!$rndseed) {
1.162     albertel  512: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    513: 	    if (!$rndseed) {
                    514: 		$rndseed=time;
                    515: 	    }
1.284     albertel  516: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  517: 	}
1.479     raeburn   518:         if (($env{'request.state'} eq "construct") && 
                    519:             ($Apache::lonhomework::type eq 'randomizetry')) {
                    520:             my $tries = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.tries"};
                    521:             if ($tries) {
                    522:                 $rndseed += $tries;
                    523:             }
1.480     raeburn   524:             $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed;
1.479     raeburn   525:         }
1.374     albertel  526: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    527: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  528: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  529: 	    srand(time);
                    530: 	    $rndseed=int(rand(2100000000));
1.284     albertel  531: 	    $env{'form.rndseed'}=$rndseed;
                    532: 	    delete($env{'form.resetdata'});
                    533: 	    delete($env{'form.newrandomization'});
1.159     albertel  534: 	}
1.488     www       535:         $rndseed=~s/\,/\:/g;
                    536:         $rndseed=~s/[^\w\d\:\-]//g;
1.489     www       537: 	if (defined($rndseed)) {
                    538:             my ($c1,$c2)=split(/\:/,$rndseed);
                    539:             unless ($c2) { $c2=0; }
                    540:             unless (($c1==int($c1)) && ($c2==int($c2))) {
                    541: 	       $rndseed=join(':',&Apache::lonnet::digest($rndseed));
                    542:             }
1.187     albertel  543:         }
1.247     albertel  544:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    545: 	   $rndseed=&Apache::lonnet::rndseed();
                    546: 	}
1.479     raeburn   547:         $set_safespace = 1;
                    548:     } elsif ($questiontype eq 'randomizetry') {
                    549:         if ($target eq 'analyze') {
                    550:             if (defined($env{'form.grade_rndseed'})) {
                    551:                 $rndseed = $env{'form.grade_rndseed'};
                    552:             }
                    553:         }
                    554:         unless (($target eq 'analyze') && (defined($rndseed))) {
                    555:             $rndseed=&Apache::lonnet::rndseed();
                    556:             my $curr_try = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.tries"};
                    557:             if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                    558:                 $curr_try ++;
                    559:             }
                    560:             if ($rndseed =~/^(\d+)[,:](\d+)$/) {
                    561:                 $rndseed = $1;
                    562:             }
                    563:             if ($curr_try) {
                    564:                 my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
                    565:                 if (($reqtries =~ /^\d+$/) && ($reqtries > 1)) {
                    566:                     my $inc = int(($curr_try-1)/$reqtries);
                    567:                     $rndseed += $inc;
                    568:                 } else {
                    569:                     $rndseed += $curr_try;
                    570:                 }
                    571:             }
                    572:         }
                    573:         $set_safespace = 1;
                    574:     }
                    575:     if ($set_safespace) {
                    576:         if ($safeeval) {
                    577:             &Apache::lonxml::debug("Setting rndseed to $rndseed");
                    578:             &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
                    579:         }
                    580:     }
                    581:     unless (($env{'request.state'} eq "construct") || ($symb eq '')) {
                    582:         $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed;
1.159     albertel  583:     }
                    584:     return $rndseed;
1.105     albertel  585: }
                    586: 
1.268     albertel  587: sub remember_problem_state {
                    588:     return '
1.284     albertel  589:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    590:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    591:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  592: }
                    593: 
1.487     www       594: sub problem_edit_action_button {
                    595:     my ($name,$action,$accesskey,$text,$flag)=@_;
                    596:     my $actionscript="setmode(this.form,'$action')";
                    597:     return "\n<input type='button' name='$name' accesskey='$accesskey' value='".&mt($text)."'".
                    598:            ($flag?&Apache::edit::submit_ask_anyway($actionscript):&Apache::edit::submit_dont_ask($actionscript))." />";
                    599: }
                    600: 
1.423     www       601: sub problem_edit_buttons {
1.487     www       602:    my ($mode)=@_;
                    603: # Buttons that do not save
                    604:    my $result='<div class="LC_edit_problem_discards">'.
                    605:               &problem_edit_action_button('subdiscview','discard','d','Discard Edits and View',1);
                    606:    if ($mode eq 'editxml') {
                    607:        $result.=&problem_edit_action_button('subedit','edit','e','Edit',1);
                    608:        $result.=&problem_edit_action_button('subundo','undoxml','u','Undo',1);
                    609:        $result.=&Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
                    610:    } else {
                    611:        $result.=&problem_edit_action_button('subeditxml','editxml','x','EditXML',1);
                    612:        $result.=&problem_edit_action_button('subundo','undo','u','Undo',1);
                    613:    }
                    614:    $result.="\n</div>";
                    615: # Buttons that save
                    616:    $result.='<div class="LC_edit_problem_saves">';
                    617:    if ($mode eq 'editxml') {
                    618:        $result.=&problem_edit_action_button('subsaveedit','saveeditxml','s','Save and EditXML');
                    619:        $result.=&problem_edit_action_button('subsaveview','saveviewxml','v','Save and View');
                    620:    } else {
                    621:        $result.=&problem_edit_action_button('subsaveedit','saveedit','s','Save and Edit');
                    622:        $result.=&problem_edit_action_button('subsaveview','saveview','v','Save and View');
                    623:    }
                    624:    $result.="\n</div>\n";
                    625:    return $result;
1.423     www       626: }
                    627: 
                    628: sub problem_edit_header {
1.487     www       629:     return '<input type="hidden" name="submitted" value="edit" />'.
                    630: 	&remember_problem_state('edit').'
1.423     www       631: <div class="LC_edit_problem_header">
                    632: <div class="LC_edit_problem_header_title">
                    633: '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    634: </div>'.
1.487     www       635: '<input type="hidden" name="problemmode" value="saveedit" />'.
1.423     www       636: &problem_edit_buttons().'
1.459     bisitz    637: <hr style="clear:both;" />
1.409     albertel  638: '.&Apache::lonxml::message_location().'
1.408     albertel  639: </div>
                    640: '.
1.458     bisitz    641:        '<table border="0" width="100%"><tr><td bgcolor="#F8F8F8">';
1.105     albertel  642: }
                    643: 
                    644: sub problem_edit_footer {
1.412     albertel  645:     return '</td></tr></table><br />
                    646: <div class="LC_edit_problem_footer">
1.453     bisitz    647:   <hr />'.
1.423     www       648: &problem_edit_buttons().'
1.459     bisitz    649:   <hr style="clear:both;" />
1.412     albertel  650: </div>
                    651: '.
1.342     albertel  652:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  653: }
                    654: 
1.235     albertel  655: sub option {
                    656:     my ($value,$name) = @_;
                    657:     my $result ="<option value='".$value."' ";
1.284     albertel  658:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  659: 	$result.=" selected='on' ";
                    660:     }
                    661:     $result.='>';
                    662:     return $result;
                    663: }
                    664: 
1.105     albertel  665: sub problem_web_to_edit_header {
1.159     albertel  666:     my ($rndseed)=@_;
1.406     albertel  667:     my $result .= '<div class="LC_edit_problem_header">';
                    668: 
                    669:     if (!$Apache::lonhomework::parsing_a_task) {
                    670: 	$result .= 
                    671: 	    '<div class="LC_edit_problem_header_title">'.
                    672: 	    &mt('Problem Testing').
                    673: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    674: 	    '</div>';
                    675:     } else {
                    676: 	$result .= 
                    677: 	    '<div class="LC_edit_problem_header_title">'.
                    678: 	    &mt('Task Testing').
                    679: 	    '</div>';
                    680:     }
                    681:     
1.315     albertel  682:     my $show_all_foils_text = 
                    683: 	($Apache::lonhomework::parsing_a_task) ?
1.452     bisitz    684: 	&mt('Show All Instances')
                    685: 	: &mt('Show All Foils');
1.315     albertel  686: 
1.452     bisitz    687:     my $show_all= '<span class="LC_nobreak"><label for="showallfoils">'
                    688:                  .'<input type="checkbox" name="showallfoils"';
1.440     bisitz    689:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.452     bisitz    690:     $show_all.= ' /> '.$show_all_foils_text
                    691:                .'</label></span>';
1.406     albertel  692: 
                    693: 
1.384     albertel  694: 
1.406     albertel  695:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  696:     if (!$Apache::lonhomework::parsing_a_task) {
                    697: 	$result.="
1.406     albertel  698: <div class='LC_edit_problem_header_row1'>
                    699: <span class=\"LC_nobreak\">
1.405     albertel  700: ".&mt("Problem Status:")."
1.235     albertel  701: <select name='problemstate'>
1.270     albertel  702:   <option value=''></option>
1.235     albertel  703:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    704:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    705:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    706:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    707:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    708: </select>
1.406     albertel  709: </span>
                    710: <span class=\"LC_nobreak\">
1.405     albertel  711: ".&mt("Problem Type:")."
1.235     albertel  712: <select name='problemtype'>
1.270     albertel  713:   <option value=''></option>
1.242     albertel  714:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   715:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  716:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.465     raeburn   717:   ".&option('surveycred' ,'problemtype').&mt("Survey Question (with credit)")."</option>
                    718:   ".&option('anonsurvey' ,'problemtype').&mt("Anonymous Survey Question")."</option>
                    719:   ".&option('anonsurveycred' ,'problemtype').&mt("Anonymous Survey Question (with credit)")."</option>
1.428     raeburn   720:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.479     raeburn   721:   ".&option('randomizetry' ,'problemtype').&mt("New Randomization Each Try")."</option>
1.235     albertel  722: </select>
1.406     albertel  723: </span>
                    724: $show_all
                    725: </div>
                    726: <div class='LC_edit_problem_header_row2'>
                    727: <span class=\"LC_nobreak\">
1.405     albertel  728: ".&mt("Feedback Mode:")."
1.235     albertel  729: <select name='problemstatus'>
                    730:   <option value=''></option>
1.242     albertel  731:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  732:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    733:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  734: </select>
1.406     albertel  735: </span>
                    736: ";
                    737: 
1.376     albertel  738:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    739: 	$result.="
1.406     albertel  740: <div class='LC_edit_problem_header_row1'>
                    741: <span class=\"LC_nobreak\">
1.405     albertel  742: ".&mt("Problem Status:")."
1.376     albertel  743: <select name='problemstate'>
                    744:   <option value=''></option>
                    745:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    746:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    747:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    748:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    749: </select>
1.406     albertel  750: </span>
                    751: $show_all
                    752: ";
                    753:     }
                    754:     $result.='
                    755:        <span class="LC_nobreak">
                    756:        '.&mt('Apply style file: ').'
                    757:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    758:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    759:        </span>
1.422     www       760:      </div>
                    761:      <div class="LC_edit_problem_header_row1">'.
                    762:        &Apache::lonxml::renderingoptions().'
1.406     albertel  763:      </div>
                    764:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    765:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    766:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    767:    </div>
1.453     bisitz    768:    <hr />
1.406     albertel  769:    <div class="LC_edit_problem_header_randomize_row">
                    770:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    771:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.488     www       772:      <input type="text" name="rndseed" size="24" value="'.
1.406     albertel  773: 	       $rndseed.'"
                    774:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    775: 
                    776:     if (!$Apache::lonhomework::parsing_a_task) {
                    777: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    778: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  779: 	$result .= '<span class="LC_nobreak">'.
                    780: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   781: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    782:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    783:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  784: 		$numtoanalyze.'" size="5" />').
                    785: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    786: 		'</span>';
                    787: 						    
1.313     albertel  788:     }
1.406     albertel  789: 
                    790:     $result.='
                    791:    </div>
1.453     bisitz    792:    <hr />
1.447     bisitz    793:    <div>';
1.416     raeburn   794:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    795:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    796:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    797:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    798:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  799:     $result.='
                    800:    </div>
1.453     bisitz    801:    <hr />
1.409     albertel  802:    '.&Apache::lonxml::message_location().'
1.406     albertel  803: </div>';
1.159     albertel  804:     return $result;
1.48      albertel  805: }
                    806: 
1.65      albertel  807: sub initialize_storage {
1.357     albertel  808:     my ($given_symb) = @_;
1.353     albertel  809:     undef(%Apache::lonhomework::results);
                    810:     undef(%Apache::lonhomework::history);
1.357     albertel  811:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  812: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  813:     
                    814:     # anonymous users (CODEd exams) have no data
                    815:     if ($name eq 'anonymous' 
                    816: 	&& !defined($domain)) {
                    817: 	return;
                    818:     }
                    819: 
1.333     albertel  820:     if ($env{'request.state'} eq 'construct' 
                    821: 	|| $symb eq ''
                    822: 	|| $Apache::lonhomework::type eq 'practice') {
                    823: 	
                    824: 	my $namespace = $symb || $env{'request.uri'};
                    825: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  826: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    827: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  828: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    829: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    830: 	    &Apache::lonxml::debug("Attempt reset");
                    831: 	}
1.159     albertel  832: 	%Apache::lonhomework::history=
1.333     albertel  833: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  834: 	my ($temp)=keys %Apache::lonhomework::history ;
                    835: 	&Apache::lonxml::debug("Return message of $temp");
                    836:     } else {
                    837: 	%Apache::lonhomework::history=
                    838: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    839:     }
1.353     albertel  840: 
1.159     albertel  841:     #ignore error conditions
1.67      albertel  842:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  843:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  844: }
                    845: 
1.435     jms       846: =pod
                    847: 
                    848: =item finalize_storage()
                    849: 
                    850: 	Stores away the result has to a student's environment
                    851: 	checks form.grade_ for specific values, other wises stores
                    852: 	to the running users environment
                    853: 	Will increment totals for attempts, students, and corrects
                    854: 	if running user has student role.
                    855: 	
                    856: =cut
                    857: 
                    858: 
1.65      albertel  859: sub finalize_storage {
1.357     albertel  860:     my ($given_symb) = @_;
1.159     albertel  861:     my $result;
1.289     albertel  862:     if (%Apache::lonhomework::results) {
1.323     albertel  863: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    864: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  865: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  866: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  867: 	if ($env{'request.state'} eq 'construct' 
                    868: 	    || $symb eq ''
                    869: 	    || $Apache::lonhomework::type eq 'practice') {
                    870: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  871: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  872: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  873: 					      $namespace,'',$domain,$name);
1.159     albertel  874: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    875: 	} else {
                    876: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    877: 					    $symb,$courseid,$domain,$name);
                    878: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.470     raeburn   879:             &store_aggregates($symb,$courseid);
1.159     albertel  880: 	}
1.323     albertel  881:     } else {
                    882: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  883:     }
1.159     albertel  884:     return $result;
1.65      albertel  885: }
                    886: 
1.435     jms       887: =pod
                    888: 
                    889: item store_aggregates()
                    890: 
                    891: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                    892: 	for the course. Increments total number of attempts, unique students 
                    893: 	and corrects for each part for an instance of a problem, as appropriate.
                    894: 	
                    895: =cut
                    896: 
1.285     raeburn   897: sub store_aggregates {
                    898:     my ($symb,$courseid) = @_;
1.479     raeburn   899:     my (%aggregate,%anoncounter,%randtrycounter);
1.286     albertel  900:     my @parts;
1.288     albertel  901:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    902:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  903:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  904:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  905:             push(@parts, $1);
1.285     raeburn   906:         }
                    907:     }
1.286     albertel  908:     foreach my $part (@parts) {
1.470     raeburn   909:         if ($env{'request.role'} =~/^st/) {
                    910:             if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    911: 	        eq 'APPROX_ANS' ||
                    912: 	        $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    913: 	        eq 'EXACT_ANS') {
                    914:                 $aggregate{$symb."\0".$part."\0correct"} = 1;
                    915:             }
                    916:             if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
                    917:                 $aggregate{$symb."\0".$part."\0users"} = 1;
                    918:             } else {
                    919:                 my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
                    920:                 if ($last_reset) {
                    921:                     if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
                    922:                         $aggregate{$symb."\0".$part."\0users"} = 1;
                    923:                     }
                    924:                 }
                    925:             }
                    926:             $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   927:         }
1.470     raeburn   928:         if (($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'anonsurvey') || 
1.479     raeburn   929:             ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'anonsurveycred') ||
                    930:             ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'randomizetry')) {
                    931:             if ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'randomizetry') {
                    932:                 $randtrycounter{$symb."\0".$part} = 1;
                    933:             } else {
                    934:                 $anoncounter{$symb."\0".$part} = 1;
                    935:             }
1.470     raeburn   936:             my $needsrelease = $Apache::lonnet::needsrelease{'parameter:type:'.$Apache::lonhomework::results{'resource.'.$part.'.type'}};
                    937:             if ($needsrelease) {   
                    938:                 my $curr_required = $env{'course.'.$env{'request.course.id'}.'.internal.releaserequired'};
                    939:                 if ($curr_required eq '') {
1.471     raeburn   940:                     &Apache::lonnet::update_released_required($needsrelease);
1.470     raeburn   941:                 } else {
                    942:                     my ($currmajor,$currminor) = split(/\./,$curr_required);
                    943:                     my ($needsmajor,$needsminor) = split(/\./,$needsrelease);
                    944:                     if (($currmajor < $needsmajor) || ($currmajor == $needsmajor && $currminor < $needsminor)) {
1.471     raeburn   945:                         &Apache::lonnet::update_released_required($needsrelease);
1.470     raeburn   946:                     }
1.292     raeburn   947:                 }
                    948:             }
1.285     raeburn   949:         }
                    950:     }
1.292     raeburn   951:     if (keys (%aggregate) > 0) {
1.289     albertel  952: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   953:                             $cdomain,$cname);
                    954:     }
1.472     raeburn   955:     if (keys(%anoncounter) > 0) {
1.481     raeburn   956:         &Apache::lonnet::cput('nohist_anonsurveys',\%anoncounter,
                    957:                               $cdomain,$cname);
1.472     raeburn   958:     }
1.479     raeburn   959:     if (keys(%randtrycounter) > 0) {
1.481     raeburn   960:         &Apache::lonnet::cput('nohist_randomizetry',\%randtrycounter,
                    961:                               $cdomain,$cname);
1.479     raeburn   962:     }
1.292     raeburn   963: }
1.289     albertel  964: 
1.65      albertel  965: sub checkout_msg {
1.211     albertel  966:     my %lt=&Apache::lonlocal::texthash( 
                    967: 		'resource'=>'The resource needs to be checked out',
                    968: 		'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.',
                    969:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    970:                 'checkout'=>'Check out Exam for Viewing',
                    971: 		'checkout?'=>'Check out Exam?');
1.352     albertel  972:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  973:     return (<<ENDCHECKOUT);
1.211     albertel  974: <h2>$lt{'resource'}</h2>
                    975:     <p>$lt{'id_expln'}</p>
1.449     bisitz    976: <p class="LC_warning">$lt{'warning'}</p>
1.444     bisitz    977: <form name="checkout" method="post" action="$uri">
1.91      albertel  978: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  979: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  980: </form>
                    981: ENDCHECKOUT
                    982: }
                    983: 
1.252     albertel  984: sub firstaccess_msg {
1.253     albertel  985:     my ($time,$symb)=@_;
1.414     albertel  986:     my $result;
                    987:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    988:     if ($interval[1] eq 'map') {
                    989: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                    990: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                    991:     
                    992: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.418     bisitz    993: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    994:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    995:                              ,$foldertitle,$time)."</h2>";
1.414     albertel  996:     } elsif ($interval[1] eq 'course') {
                    997: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.418     bisitz    998:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    999:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                   1000:                              ,$course,$time)."</h2>";
1.414     albertel 1001:     } else {
                   1002: 	my $title=&Apache::lonnet::gettitle($symb);
1.418     bisitz   1003:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
                   1004:                              .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                   1005:                              ,$title,$time)."</h2>";
1.414     albertel 1006:     }
1.352     albertel 1007:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz   1008:     my $buttontext = &mt('Show Resource');
                   1009:     my $timertext = &mt('Start Timer?');
1.414     albertel 1010:     $result .= (<<ENDCHECKOUT);
1.444     bisitz   1011: <form name="markaccess" method="post" action="$uri">
1.252     albertel 1012: <input type="hidden" name="markaccess" value="yes" />
1.418     bisitz   1013: <input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel 1014: </form>
                   1015: ENDCHECKOUT
1.414     albertel 1016:     return $result;
1.252     albertel 1017: }
                   1018: 
1.204     albertel 1019: sub init_problem_globals {
                   1020:     my ($type)=@_;
                   1021:     #initialize globals
1.308     foxr     1022:     #   For problems, we start out in part 0 (outside a <part> tag).
                   1023:     #   and part 0 is used to describe the main body of the <problem>
                   1024:     #
1.204     albertel 1025:     if ($type eq 'problem') {
                   1026: 	$Apache::inputtags::part='0';
                   1027: 	@Apache::inputtags::partlist=('0');
1.405     albertel 1028: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel 1029: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr     1030: 
1.266     albertel 1031:     } elsif ($type eq 'library') {
1.204     albertel 1032: 	$Apache::inputtags::part='';
                   1033: 	@Apache::inputtags::partlist=();
1.405     albertel 1034: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel 1035: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr     1036: 
1.304     albertel 1037:     } elsif ($type eq 'Task') {
                   1038: 	$Apache::inputtags::part='0';
                   1039: 	@Apache::inputtags::partlist=('0');
1.405     albertel 1040: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel 1041: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel 1042:     }
1.477     www      1043:     @Apache::functionplotresponse::callscripts=();
1.204     albertel 1044:     @Apache::inputtags::responselist = ();
                   1045:     @Apache::inputtags::importlist = ();
                   1046:     @Apache::inputtags::previous=();
                   1047:     @Apache::inputtags::previous_version=();
                   1048:     $Apache::structuretags::printanswer='No';
                   1049:     @Apache::structuretags::whileconds=();
                   1050:     @Apache::structuretags::whilebody=();
                   1051:     @Apache::structuretags::whileline=();
                   1052:     $Apache::lonhomework::scantronmode=0;
                   1053:     undef($Apache::lonhomework::name);
1.358     albertel 1054:     undef($Apache::lonhomework::default_type);
                   1055:     undef($Apache::lonhomework::type);
1.204     albertel 1056: }
                   1057: 
                   1058: sub reset_problem_globals {
                   1059:     my ($type)=@_;
                   1060:     undef(%Apache::lonhomework::history);
                   1061:     undef(%Apache::lonhomework::results);
                   1062:     undef($Apache::inputtags::part);
1.498     raeburn  1063:     if ($type eq 'Task') {
                   1064:         undef($Apache::inputtags::slot_name);
                   1065:     }
1.208     albertel 1066: #don't undef this, lonhomework.pm takes care of this, we use this to 
                   1067: #detect if we try to do 2 problems in one file
                   1068: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel 1069:     undef($Apache::lonhomework::name);
1.358     albertel 1070:     undef($Apache::lonhomework::default_type);
                   1071:     undef($Apache::lonhomework::type);
                   1072:     undef($Apache::lonhomework::scantronmode);
                   1073:     undef($Apache::lonhomework::ignore_response_errors);
1.477     www      1074:     undef(@Apache::functionplotresponse::callscripts);
1.405     albertel 1075:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel 1076: }
                   1077: 
1.241     albertel 1078: sub set_problem_state {
1.240     albertel 1079:     my ($part)=@_;
1.284     albertel 1080:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel 1081: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                   1082: 	    'correct_by_student';
                   1083:     }
                   1084: }
                   1085: 
1.241     albertel 1086: sub get_problem_status {
                   1087:     my ($part)=@_;
1.267     albertel 1088:     my $problem_status;
1.284     albertel 1089:     if ($env{'request.state'} eq 'construct' &&
                   1090: 	defined($env{'form.problemstatus'})) {
                   1091: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel 1092:     } else {
                   1093: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                   1094: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel 1095: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel 1096:     }
                   1097:     return $problem_status;
                   1098: }
                   1099: 
1.9       albertel 1100: sub start_problem {
1.326     albertel 1101:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel 1102: 
1.311     foxr     1103:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel 1104:     if (!$Apache::lonxml::metamode) {
                   1105: 	&Apache::lonxml::startredirection();
                   1106:     }
1.311     foxr     1107: 
1.308     foxr     1108:     # Problems don't nest and we don't allow more than one <problem> in
                   1109:     # a .problem file.
                   1110:     #
1.184     albertel 1111:     if ( $Apache::inputtags::part ne '' ||
                   1112: 	 $Apache::lonhomework::parsing_a_problem) {
                   1113: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel 1114: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel 1115: 	return '';
                   1116:     }
1.184     albertel 1117: 
                   1118:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel 1119:     &init_problem_globals('problem');
1.166     albertel 1120: 
1.284     albertel 1121:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel 1122: 	$Apache::lonhomework::scantronmode=1;
                   1123:     }
1.161     albertel 1124: 
1.159     albertel 1125:     if ($target ne 'analyze') {
1.415     raeburn  1126:         my $type = &Apache::lonnet::EXT('resource.0.type');
                   1127: 	$Apache::lonhomework::type=$type;
1.284     albertel 1128: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel 1129: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel 1130: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel 1131: 	}
1.332     albertel 1132: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel 1133:     }
1.164     albertel 1134:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel 1135: 	my $uri=$env{'request.uri'};
1.159     albertel 1136: 	if ($uri=~/\.(\w+)$/) {
                   1137: 	    $Apache::lonhomework::type=$1;
                   1138: 	    &Apache::lonxml::debug("Using type of $1");
                   1139: 	} else {
                   1140: 	    $Apache::lonhomework::type='problem';
                   1141: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                   1142: 	}
1.87      albertel 1143:     }
1.301     albertel 1144:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www      1145: 
1.363     albertel 1146:     &initialize_storage();
1.389     albertel 1147:     if ($target ne 'analyze'
                   1148:        	&& $env{'request.state'} eq 'construct') {
                   1149: 	&set_problem_state('0');
                   1150:     }
                   1151: 
1.366     albertel 1152:     if ($target eq 'web') {
                   1153: 	&Apache::lonxml::debug(" grading history ");
                   1154: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                   1155:     }
1.363     albertel 1156: 
1.159     albertel 1157:     #added vars to the scripting enviroment
1.213     albertel 1158:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel 1159:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel 1160:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1161:     my $status;
                   1162:     my $accessmsg;
                   1163: 
1.343     albertel 1164:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel 1165:     my ($result,$form_tag_start);
1.354     albertel 1166:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                   1167: 	|| $target eq 'edit') {
1.350     albertel 1168: 	($result,$form_tag_start) =
                   1169: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1170: 			$name);
                   1171:     }
                   1172: 
1.284     albertel 1173:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel 1174: 
1.479     raeburn  1175:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval,$target); }
1.159     albertel 1176:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1177: 	$target eq 'tex') {
1.284     albertel 1178: 	if ($env{'form.markaccess'}) {
1.414     albertel 1179: 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
                   1180: 	    &Apache::lonnet::set_first_access($interval[1]);
1.252     albertel 1181: 	}
1.501   ! foxr     1182: 	my $resource_due =  &Apache::lonhomework::due_date(0, $env{'request.symb'});
        !          1183: 	my $time_left = $resource_due - time();
        !          1184: 	if ($resource_due && ($time_left > 0)) {
        !          1185: 	    $result .= &Apache::lonhtmlcommon::set_due_date($resource_due);
        !          1186: 	}
1.479     raeburn  1187: 
1.501   ! foxr     1188: 	    
1.479     raeburn  1189:         ($status,$accessmsg,my $slot_name,my $slot) =
                   1190:             &Apache::lonhomework::check_slot_access('0','problem');
                   1191:         push (@Apache::inputtags::status,$status);
                   1192: 
1.159     albertel 1193: 	#handle rand seed in construction space
1.479     raeburn  1194: 	my $rndseed=&setup_rndseed($safeeval,$target);
1.367     albertel 1195: 	my ($symb)=&Apache::lonnet::whichuser();
1.479     raeburn  1196: 
1.333     albertel 1197: 	if ($env{'request.state'} ne "construct" && 
                   1198: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel 1199: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
1.462     raeburn  1200: 		$rndseed.'" />'.
                   1201: 		    '<input type="submit" name="resetdata"
                   1202:                              value="'.&mt('New Problem Variation').'" />';
1.334     albertel 1203: 	    if (exists($env{'form.username'})) {
                   1204: 		$form_tag_start.=
1.164     albertel 1205: 		    '<input type="hidden" name="username"
1.284     albertel 1206:                              value="'.$env{'form.username'}.'" />';
1.334     albertel 1207: 	    }
1.462     raeburn  1208: 	    if ($env{'request.role.adv'}) {
                   1209: 		$form_tag_start.= ' <label class="LC_nobreak">'
                   1210:                          .'<input type="checkbox" name="showallfoils"';
                   1211: 		if (defined($env{'form.showallfoils'})) {
                   1212: 		    $form_tag_start.=' checked="checked"';
                   1213: 		}
                   1214:                 $form_tag_start.= ' /> '
                   1215:                                  .&mt('Show All Foils')
                   1216:                                  .'</label>';
                   1217: 	    }
1.417     www      1218:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn  1219:                 $form_tag_start.=&practice_problem_header();
1.417     www      1220:             }
1.462     raeburn  1221: 	    $form_tag_start.='<hr />';
1.479     raeburn  1222:         } elsif (($env{'request.state'} ne "construct") &&
                   1223:                  ($Apache::lonhomework::type eq 'randomizetry') &&
                   1224:                  ($status eq 'CAN_ANSWER')) {
                   1225:             my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
                   1226:             my $problemstatus = &get_problem_status($Apache::inputtags::part);
                   1227:             $form_tag_start.=&randomizetry_problem_header($problemstatus,$reqtries);
                   1228:         }
1.324     albertel 1229: 
1.159     albertel 1230: 	my $expression='$external::datestatus="'.$status.'";';
                   1231: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                   1232: 	&Apache::run::run($expression,$safeeval);
                   1233: 	&Apache::lonxml::debug("Got $status");
1.324     albertel 1234: 
1.159     albertel 1235: 	if (( $status eq 'CLOSED' ) ||
                   1236: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1237: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel 1238: 	    ( $status eq 'BANNED') ||
1.216     albertel 1239: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel 1240: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.499     raeburn  1241:             ( $status eq 'NOTRESERVABLE') ||
                   1242:             ( $status eq 'RESERVABLE') ||
                   1243:             ( $status eq 'RESERVABLE_LATER') ||
1.216     albertel 1244: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1245: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                   1246: 						       $style);
1.159     albertel 1247: 	    if ( $target eq "web" ) {
1.343     albertel 1248: 		my $msg;
1.159     albertel 1249: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel 1250: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.441     raeburn  1251:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                   1252:                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
1.499     raeburn  1253:                 } elsif (($status eq 'RESERVABLE') || ($status eq 'RESERVABLE_LATER') ||
                   1254:                          ($status eq 'NOTRESERVABLE')) {
                   1255:                     $msg.='<h1>'.&mt('Access requires reservation to work at specific time/place.').'</h1>';
1.253     albertel 1256: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel 1257: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.499     raeburn  1258:                 }
1.216     albertel 1259: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www      1260: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel 1261: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel 1262: 		    $msg.=&checkout_msg();
1.252     albertel 1263: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel 1264: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel 1265: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn  1266: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.499     raeburn  1267:                 } elsif ($status eq 'RESERVABLE') {
                   1268:                     $msg.=&mt('Available to make a reservation.').' '.&mt('Reservation window closes [_1].',
                   1269:                               &Apache::lonnavmaps::timeToHumanString($accessmsg,'end')).
                   1270:                           '<br />'.
                   1271:                           &Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
                   1272:                 } elsif ($status eq 'RESERVABLE_LATER') {
                   1273:                     $msg.=&mt('Window to make a reservation will open [_1].',
                   1274:                               &Apache::lonnavmaps::timeToHumanString($accessmsg,'start'));
                   1275:                 } elsif ($status eq 'NOTRESERVABLE') {
                   1276:                     $msg.=&mt('Not available to make a reservation.');  
1.159     albertel 1277: 		}
                   1278: 		$result.=$msg.'<br />';
                   1279: 	    } elsif ($target eq 'tex') {
1.332     albertel 1280: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                   1281: 		                    : '\begin{minipage}{\textwidth}';
1.443     foxr     1282: 		$result.='\noindent \vskip 1 mm '.
1.332     albertel 1283: 		    $startminipage.'\vskip 0 mm';
1.159     albertel 1284: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel 1285: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel 1286: 		} else {
1.211     albertel 1287: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel 1288: 		}
                   1289: 	    }
1.324     albertel 1290: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel 1291: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                   1292: 						       $style);
1.324     albertel 1293: 	    if ($target eq 'web') {
1.375     albertel 1294: 		$result .= 
                   1295: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel 1296: 	    } elsif ($target eq 'grade') {
                   1297: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                   1298: 							'problem');
                   1299: 	    }
1.159     albertel 1300: 	} elsif ($target eq 'web') {
1.360     albertel 1301: 	    if ($status eq 'CAN_ANSWER' 
                   1302: 		&& $slot_name ne ''
                   1303: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                   1304: 		# unproctored slot access, self checkin
                   1305: 		&Apache::bridgetask::check_in('problem',undef,undef,
                   1306: 					      $slot_name);
                   1307: 	    }
1.368     albertel 1308: 	    $result.="\n $form_tag_start \t".	
1.227     albertel 1309: 	      '<input type="hidden" name="submitted" value="yes" />';
                   1310: 	    # create a page header and exit
1.284     albertel 1311: 	    if ($env{'request.state'} eq "construct") {
                   1312: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn  1313:                 if ($Apache::lonhomework::type eq 'practice') {
                   1314:                     $result.= '<input type="submit" name="resetdata" '.
                   1315:                               'value="'.&mt('New Problem Variation').'" />'.
                   1316:                               &practice_problem_header().'<hr />';
                   1317:                 }
1.227     albertel 1318: 	    }
                   1319: 	    # if we are viewing someone else preserve that info
1.284     albertel 1320: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel 1321: 		foreach my $field ('symb','courseid','domain','username') {
                   1322: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1323: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1324: 		}
1.479     raeburn  1325:                 foreach my $field ('trial','questiontype') {
                   1326:                     if ($env{"form.grade_$field"} ne '') {
                   1327:                         $result .= '<input type="hidden" name="grade_'.$field.
                   1328:                             '" value="'.$env{"form.grade_$field"}.'" />'."\n";
                   1329:                     }
                   1330:                 }
1.159     albertel 1331: 	    }
1.490     raeburn  1332:             if ($env{'form.grade_imsexport'}) {
                   1333:                 $result = '';
                   1334:             }
1.159     albertel 1335: 	} elsif ($target eq 'tex') {
1.319     foxr     1336: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
1.500     foxr     1337: 	    $result .= &select_metadata_hyphenation();
                   1338: 	    
1.319     foxr     1339: 
1.99      sakharuk 1340: 	}
1.159     albertel 1341:     } elsif ($target eq 'edit') {
1.343     albertel 1342: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1343: 	$Apache::lonxml::warnings_error_header=
                   1344: 	    &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 1345: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1346: 	$result.=$temp;
                   1347:     } elsif ($target eq 'modified') {
                   1348: 	$result=$token->[4];
                   1349:     } else {
                   1350: 	# page_start returned a starting result, delete it if we don't need it
                   1351: 	$result = '';
1.99      sakharuk 1352:     }
1.159     albertel 1353:     return $result;
1.9       albertel 1354: }
                   1355: 
                   1356: sub end_problem {
1.159     albertel 1357:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1358:     my $result;
1.310     foxr     1359: 
1.321     albertel 1360:     if (!$Apache::lonxml::metamode) {
                   1361: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1362: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1363:     }
1.319     foxr     1364: 
                   1365:     if ($target eq 'tex') {
1.321     albertel 1366: 	# Figure out the front matter and replace the
                   1367: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1368: 	# this in end_problem because whether or not we display due
                   1369: 	# dates depends on whether due dates have already been
                   1370: 	# displayed in the problem parts.
                   1371: 
1.319     foxr     1372: 	my $frontmatter   = '';
                   1373: 	my $startminipage = '';
                   1374: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1375: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1376: 	}
                   1377: 	my $id = $Apache::inputtags::part;
                   1378: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1379: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1380: 	my @packages = split /,/,$packages;
                   1381: 	my $allow_print_points = 0;
                   1382: 	foreach my $partial_key (@packages) {
                   1383: 	    if ($partial_key=~m/^part_0$/) {
                   1384: 		$allow_print_points=1;
                   1385: 	    }
                   1386: 	}
                   1387: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1388: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1389: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1390: 			'.disableexampointprint'}) eq 'yes') {
                   1391: 	    $allow_print_points=0;
                   1392: 	}
                   1393: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.443     foxr     1394: 	my $begin_doc=' \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
1.500     foxr     1395: 	&clear_required_languages();
1.319     foxr     1396: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1397: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1398: 	
                   1399: 	#  Figure out what the due date is and if we need to print
                   1400: 	#  it in the problem header.  We have been logging the
                   1401: 	#  last due date written to file. 
                   1402: 	
                   1403: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                   1404: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
1.448     bisitz   1405:         my $duedate_text = &mt('Due date: [_1]'
                   1406:                               ,&Apache::lonlocal::locallocaltime($duetime));
1.319     foxr     1407: 	my $temp_file;
                   1408: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1409: 	
                   1410: 	# Figure out what the last printed due date is or set it
                   1411: 	# to the epoch if no duedates have been printed.
                   1412: 	
                   1413: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1414: 	if (-e $filename) {
                   1415: 	    $temp_file = Apache::File->new($filename);
                   1416: 	    my @due_file      = <$temp_file>;
                   1417: 	    $due_file_content = $due_file[$#due_file];
                   1418: 	    chomp $due_file_content;
                   1419: 	} 
                   1420: 	
                   1421: 	# We display the due date iff it is not the same as the last
                   1422: 	# duedate in problem header ($due_file_content), and
                   1423: 	# none of our parts displayed a duedate.
                   1424: 	#
                   1425: 	my $parts_with_displayduedate;
                   1426: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1427: 	    $parts_with_displayduedate = 
                   1428: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1429: 	} else {
                   1430: 	    $parts_with_displayduedate = 0;
                   1431: 	}
                   1432: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1433: 	    $temp_file = Apache::File->new('>'.$filename);
                   1434: 	    print $temp_file "$duetime\n";
                   1435: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1436: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1437: 		    $frontmatter .= $begin_doc.
1.448     bisitz   1438: 			'\textit{'.$duedate_text.'} '.$toc_line;
1.319     foxr     1439: 		} else {
                   1440: 		    $frontmatter.= $begin_doc.$toc_line;
1.463     foxr     1441: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { 
1.492     christia 1442: 			$frontmatter .= '\fbox{\textit{'.&mt('[quant,_1,pt,pt]',$weight ).'}}';
1.463     foxr     1443: 		    }
1.319     foxr     1444: 		}
                   1445: 	    } else {
1.448     bisitz   1446: 		$frontmatter .= '\vskip 1mm\textit{'.$duedate_text.'} \\\\\\\\'.$startminipage;
1.319     foxr     1447: 	    }
                   1448: 	} else {
                   1449: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1450: 		$frontmatter .= $begin_doc.$toc_line;
1.463     foxr     1451: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { 
1.492     christia 1452: 		    $frontmatter .= '\fbox{\textit{'.&mt('[quant,_1,pt,pt]',$weight ).'}}';
1.463     foxr     1453: 		}
1.319     foxr     1454: 	    } else {
1.381     albertel 1455: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1456: 	    }
                   1457: 	}
                   1458: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1459:     }
                   1460: 
1.159     albertel 1461:     my $status=$Apache::inputtags::status['-1'];
                   1462:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1463: 	$target eq 'tex') {
1.249     albertel 1464: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1465: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1466: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1467: 		&Apache::inputtags::grade;
1.324     albertel 1468: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1469: 		# no need to grade, and don't want to hide data
1.249     albertel 1470: 	    } else {
                   1471: 		# move any submission data to .hidden
                   1472: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1473: 	    }
1.159     albertel 1474: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1475: 		  $Apache::inputtags::part eq '0' &&
1.490     raeburn  1476: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED'
                   1477:                   && !$env{'form.grade_imsexport'}) {
1.159     albertel 1478: 	    # if part is zero, no <part>s existed, so we need show the current
                   1479: 	    # grading status
                   1480: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1481: 	    $result.= $gradestatus;
                   1482: 	}
                   1483: 	if (
1.284     albertel 1484: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1485: 	    ($target eq 'answer') || ($target eq 'tex')
                   1486: 	   ) {
1.490     raeburn  1487: 	    if (($target ne 'tex') &&
                   1488: 		($env{'form.answer_output_mode'} ne 'tex') && 
                   1489:                 (!$env{'form.grade_imsexport'})) {
1.254     www      1490: 		$result.="</form>";
1.159     albertel 1491: 	    }
                   1492: 	    if ($target eq 'web') {
1.346     albertel 1493: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1494: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1495: 		my $endminipage = '';
1.284     albertel 1496: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1497: 		    $endminipage = '\end{minipage}';
                   1498: 		}
1.284     albertel 1499:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1500: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1501: 		} else {
1.262     sakharuk 1502: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1503: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1504: 			$result .= $endminipage.'\end{document} ';
                   1505: 		    } else {
1.382     albertel 1506: 			$result .= $endminipage;
1.262     sakharuk 1507: 		    }
1.159     albertel 1508: 		}
                   1509: 	    }
                   1510: 	}
1.476     www      1511:         if ($target eq 'web') {
                   1512:            $result.=&Apache::functionplotresponse::init_script();
                   1513:         }
1.159     albertel 1514: 	if ($target eq 'grade') {
                   1515: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1516: 	    &finalize_storage();
                   1517: 	}
1.284     albertel 1518: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1519: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1520: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1521: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1522: 	                        # we always show answer mode too.
1.159     albertel 1523: 	}
                   1524:     } elsif ($target eq 'meta') {
                   1525: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1526: 	    @Apache::inputtags::response=();
1.159     albertel 1527: 	    $result=&Apache::response::mandatory_part_meta;
                   1528: 	}
1.215     albertel 1529: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1530: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1531:     } elsif ($target eq 'edit') {
                   1532: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1533: 	$result .= &problem_edit_footer();
1.320     albertel 1534:     } elsif ($target eq 'modified') {
                   1535: 	 $result .= $token->[2];
1.159     albertel 1536:     }
1.155     albertel 1537: 
1.284     albertel 1538:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1539: 	&Apache::inputtags::check_for_duplicate_ids();
                   1540:     }
1.204     albertel 1541: 
                   1542:     &reset_problem_globals('problem');
1.159     albertel 1543: 
                   1544:     return $result;
1.48      albertel 1545: }
                   1546: 
1.108     albertel 1547: 
1.48      albertel 1548: sub start_library {
1.159     albertel 1549:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1550:     my ($result,$form_tag_start);
1.371     albertel 1551:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1552: 	&init_problem_globals('library');
                   1553: 	$Apache::lonhomework::type='problem';
                   1554:     }
1.159     albertel 1555:     if ($target eq 'edit') {
1.343     albertel 1556: 	($result,$form_tag_start)=
                   1557: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1558: 			'Edit');
                   1559: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1560: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1561: 	$result.=$temp;
                   1562:     } elsif ($target eq 'modified') {
                   1563: 	$result=$token->[4];
1.340     albertel 1564:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1565: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1566: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1567: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1568: 	($result,$form_tag_start)=
                   1569: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1570: 			$name);
1.479     raeburn  1571: 	my $rndseed=&setup_rndseed($safeeval,$target);
1.343     albertel 1572: 	$result.=" \n $form_tag_start".	
1.159     albertel 1573: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1574: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1575:         if ($Apache::lonhomework::type eq 'practice') {
                   1576:             $result.= '<input type="submit" name="resetdata" '.
                   1577:                       'value="'.&mt('New Problem Variation').'" />'.
                   1578:                       &practice_problem_header().'<hr />';
                   1579:         }
1.159     albertel 1580:     }
                   1581:     return $result;
1.48      albertel 1582: }
                   1583: 
                   1584: sub end_library {
1.159     albertel 1585:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1586:     my $result='';
                   1587:     if ($target eq 'edit') {
                   1588: 	$result=&problem_edit_footer();
1.371     albertel 1589:     } elsif ($target eq 'web' 
                   1590: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1591: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1592: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1593:     }
1.371     albertel 1594:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1595: 	&reset_problem_globals('library');
                   1596:     }
1.159     albertel 1597:     return $result;
1.197     www      1598: }
                   1599: 
                   1600: sub start_definetag {
1.326     albertel 1601:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1602: 
                   1603:     my $result;
                   1604: 
                   1605:     my $name = $token->[2]->{'name'};
1.326     albertel 1606:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1607:     if ($target eq 'web') {
                   1608: 	if ($name=~/^\//) {
                   1609: 	    $result=
                   1610: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1611: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1612: 	} else {
                   1613: 	    $result=
                   1614: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1615: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1616: 	}
                   1617: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1618: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1619:     }
                   1620:     return $result;
                   1621: }
                   1622: 
                   1623: sub end_definetag {
                   1624:     return '';
1.1       albertel 1625: }
                   1626: 
                   1627: sub start_block {
1.201     albertel 1628:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1629: 
                   1630:     my $result;
1.1       albertel 1631: 
1.339     albertel 1632:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1633: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1634: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1635: 	if (defined($code) && $code ne '') {
1.137     albertel 1636: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1637: 		&Apache::lonxml::default_homework_load($safeeval);
                   1638: 	    }
1.131     albertel 1639: 	    $result = &Apache::run::run($code,$safeeval);
                   1640: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1641: 	} else {
                   1642: 	    $result='1';
                   1643: 	}
                   1644: 	if ( ! $result ) {
1.201     albertel 1645: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1646: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1647: 	}
                   1648: 	$result='';
                   1649:     } elsif ($target eq 'edit') {
                   1650: 	$result .=&Apache::edit::tag_start($target,$token);
                   1651: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1652: 					  $token,40);
                   1653: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1654:     } elsif ($target eq 'modified') {
                   1655: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1656: 						     $safeeval,'condition');
                   1657: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1658:     }
1.131     albertel 1659:     return $result;
1.1       albertel 1660: }
                   1661: 
                   1662: sub end_block {
1.167     www      1663:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1664:     my $result;
                   1665:     if ($target eq "edit") {
                   1666: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1667:     }
                   1668:     return $result;
                   1669: }
1.500     foxr     1670: #
                   1671: #  <languageblock [include='lang1,lang2...'] [exclude='lang1,lang2...']>
                   1672: #  ...
                   1673: #  </languageblock>
                   1674: #
                   1675: #   This declares the intent to provide content that can be rendered in the
                   1676: #   set of languages in the include specificatino but not in the exclude
                   1677: #   specification.  If a currently preferred language is in the include list
                   1678: #   the content in the <languageblock>...</languageblock> is rendered
                   1679: #   If the currently preferred language is in the exclude list,
                   1680: #   the content in the <languageblock>..></languageblock is not rendered.
                   1681: #
                   1682: #   Pathalogical case handling:
                   1683: #     - Include specified, without the preferred language but exclude  specified
                   1684: #       also without the preferred langauge results in rendering the block.
                   1685: #     - Exclude specified without include and excluden not containing a 
                   1686: #       preferred language renders the block.
                   1687: #     - Include and exclude both specifying the preferred language does not
                   1688: #       render the block.
                   1689: #     - If neither include/exclude is specified, the block gets rendered.
                   1690: #
                   1691: #  This tag has no effect when target is in {edit, modified}
                   1692: #
1.167     www      1693: sub start_languageblock {
1.201     albertel 1694:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1695: 
1.500     foxr     1696:     my $result = '';
1.167     www      1697: 
1.339     albertel 1698:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1699: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1700: 	my $include = $token->[2]->{'include'};
                   1701: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1702:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.500     foxr     1703: 
                   1704:         # This should not even happen, since we should at least have the server language
                   1705: 
                   1706:         if (!$preferred_languages[0]) { 
                   1707: 	    $preferred_languages[0]='en'; 
                   1708: 	}
                   1709: 
                   1710:         # Now loop over all languages in order of preference
                   1711: 
                   1712: 	my $render;
1.398     www      1713:         foreach my $preferred_language (@preferred_languages) {
1.500     foxr     1714: 
                   1715: 	    # If neither include/nor exlude is present the block is going
                   1716: 	    # to get rendered.
                   1717: 
1.399     www      1718:            my $found=0;
1.500     foxr     1719:            $render=1;
                   1720: 
                   1721: 	   #  If include is specified,  don't render the block
                   1722: 	   #  unless the preferred language is included in the set.
                   1723: 
1.398     www      1724: 	   if ($include) {
1.500     foxr     1725:               $render=0;
1.398     www      1726:               foreach my $included_language (split(/\,/,$include)) {
                   1727:                  if ($included_language eq $preferred_language) {
1.500     foxr     1728:                     $render=1; 
1.399     www      1729:                     $found=1; 
1.500     foxr     1730: 		    last;	# Only need to find the first.
1.398     www      1731:                  }
                   1732:               }
                   1733: 	   }
1.500     foxr     1734:            # Do we have an exclude argument?
                   1735: 	   # If so, and one of the languages matches a preferred language
                   1736: 	   # inhibit rendering the block.  Note that in the pathalogical case the
                   1737: 	   # author has specified a preferred language in both the include and exclude
                   1738: 	   # attribte exclude is preferred.  
                   1739: 
1.398     www      1740:            if ($exclude) {
1.500     foxr     1741:               $render=1;
1.398     www      1742:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1743:                  if ($excluded_language eq $preferred_language) {
1.500     foxr     1744:                     $render=0;
1.399     www      1745:                     $found=1;
1.500     foxr     1746: 		    last;	# Only need to find the first.
1.398     www      1747:                  }
                   1748:               }
                   1749: 	   }
1.500     foxr     1750:            if ($found) { 
                   1751: 	       last; 		# Done on any match of include or exclude.
                   1752: 	   }
1.398     www      1753:         }
1.500     foxr     1754: 	# If $render not true skip the entire block until </languageblock>
                   1755: 	#
                   1756: 
                   1757: 	if ( ! $render ) {
1.201     albertel 1758: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1759: 						   $style);
                   1760: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1761: 	}
1.500     foxr     1762: 	# If $render is true, we've not skipped the contents of the <languageglock>
                   1763: 	# and the normal loncapa processing flow will render it as a matter of course.
                   1764: 
1.167     www      1765:     } elsif ($target eq 'edit') {
                   1766: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1767: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1768: 					  $token,40);
1.211     albertel 1769: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1770: 					  $token,40);
                   1771: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1772:     } elsif ($target eq 'modified') {
                   1773: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1774: 						     $safeeval,'include',
                   1775: 						     'exclude');
1.167     www      1776: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1777:     }
                   1778:     return $result;
                   1779: }
                   1780: 
                   1781: sub end_languageblock {
1.170     www      1782:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1783:     my $result;
1.201     albertel 1784:     if ($target eq "edit") {
1.170     www      1785: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1786:     }
                   1787:     return $result;
                   1788: }
1.500     foxr     1789: #  languagblock specific tags:
                   1790: {
                   1791:     # For chunks of a resource that has translations, this hash contains
                   1792:     # the translations available indexed by language name.
                   1793:     #
                   1794: 
                   1795:     my %available_texts;       
1.170     www      1796: 
1.500     foxr     1797:     # <translated> starts a block of a resource that has multiple translations.
                   1798:     # See the <lang> tag as well.
                   1799:     # When </translated> is encountered if there is a translation for the 
                   1800:     # currently preferred language, that is rendered inthe web/tex/webgrade
                   1801:     # targets.  Otherwise, the default text is rendered.
                   1802:     #
                   1803:     # Note that <lang> is only registered for the duration of the 
                   1804:     #  <translated>...</translated> block 
                   1805:     #
                   1806:     # Pathalogical case handling:
                   1807:     #   - If there is no <lang> that specifies a 'default' and there is no
                   1808:     #     translation that matches a preferred language, nothing is rendered.
                   1809:     #   - Nested <translated>...</translated> might be linguistically supported by
                   1810:     #     XML due to the stack nature of tag registration(?) however the rendered
                   1811:     #     output will be incorrect because there is only one %available_texts
                   1812:     #     has and end_translated clears it.
                   1813:     #   - Material outside of a <lang>...</lang> block within the
                   1814:     #     <translated>...<translated> block won't render either e.g.:
                   1815:     #    <translated>
                   1816:     #      The following will be in your preferred langauge:
                   1817:     #      <lang which='en'>
                   1818:     #         This section in english
                   1819:     #      </lang>
                   1820:     #      <lang which='sgeiso'>
                   1821:     #         Hier es ist auf Deutsch.
                   1822:     #      </lang>
                   1823:     #      <lang which='sfriso'>
                   1824:     #         En Francais
                   1825:     #      </lang>
                   1826:     #    </translated>
                   1827:     #
                   1828:     #    The introductory text prior to the first <lang> tag is not rendered.
                   1829:     #
1.397     albertel 1830:     sub start_translated {
                   1831: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1832: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1833: 	undef(%available_texts);
                   1834:     }
                   1835:     
                   1836:     sub end_translated {
                   1837: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1838: 	my $result;
                   1839: 	#show the translation on viewable targets
                   1840: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1841: 	    # or non-viewable targets, if it's embedded in something that
                   1842: 	    # wants the output
                   1843: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1844: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1845: 	    my @possibilities = keys(%available_texts);
                   1846: 	    my $which = 
                   1847: 		&Apache::loncommon::languages(\@possibilities) || 'default';
1.500     foxr     1848: 	    if ($target eq 'tex') {
                   1849: 		$result = &select_hyphenation($which);
                   1850: 	    }
                   1851: 	    $result .= $available_texts{$which};
                   1852: 	    if ($target eq 'tex') {
                   1853: 		$result .= &select_metadata_hyphenation(); # Restore original language.
                   1854: 	    }
1.397     albertel 1855: 	}
                   1856: 	undef(%available_texts);
                   1857: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1858: 	return $result;
                   1859:     }
                   1860: 
1.500     foxr     1861:     # <lang [which='language-name'] [other='lang1,lang2...']>  
                   1862:     #  Specifies that the block contained within it is a translation 
                   1863:     #  for a specific language specified by the 'which' attribute. The
                   1864:     #   'other' attribute can be used by itself or in conjunction with
                   1865:     #   which to specify this tag _may_ be used as a translation for some
                   1866:     #   list of languages. e.g.:  <lang which='senisoUS' other='senisoCA,senisoAU,seniso'>
                   1867:     #   specifying that the block provides a translation for US (primary)
                   1868:     #   Canadian, Australian and UK Englush.
                   1869:     #   
                   1870:     # Comment: this seems a bit silly why not just support a list of languages
                   1871:     #           e.g. <lang which='l1,l2...'> and ditch the other attribute?
                   1872:     #
                   1873:     #  Effect:
                   1874:     #    The material within the <lang>..</lang> block is stored in the
                   1875:     #    specified set of $available_texts hash entries, the appropriate one
                   1876:     #    is selected at </translated> time.
                   1877:     #
                   1878:     #  Pathalogical case handling:
                   1879:     #    If a language occurs multiple times within a <translated> block,
                   1880:     #    only the last one is rendered e.g.:
                   1881:     #
                   1882:     #    <translated>
                   1883:     #       <lang which='senisoUS', other='senisoCA,senisoAU,seniso'>
                   1884:     #          Red green color blindness is quite common affecting about 7.8% of 
                   1885:     #          the male population, but onloy about .65% of the female population.
                   1886:     #       </lang>
                   1887:     #          Red green colour blindness is quite common affecting about 7.8% of 
                   1888:     #          the male population, but onloy about .65% of the female population.
                   1889:     #       <lang which='seniso', other='senisoCA,senisoAU'>
                   1890:     #     </translated>
                   1891:     #
                   1892:     #    renders the correct spelling of color (colour) for people who have specified
                   1893:     #    a preferred language that is one of the British Commonwealth languages
                   1894:     #    even though those are also listed as valid selections for the US english
                   1895:     #    <lang> block.
                   1896:     #
1.397     albertel 1897:     sub start_lang {
                   1898: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1899: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1900: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1901: 	    &Apache::lonxml::startredirection();
                   1902: 	}
                   1903: 	return '';
                   1904:     }
                   1905: 
                   1906:     sub end_lang {
                   1907: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1908: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1909: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1910: 	    my $result = &Apache::lonxml::endredirection();
                   1911: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1912: 						   $safeeval);
1.431     raeburn  1913:             if ($which=~/\w/) {
                   1914:                 $available_texts{$which} = $result;
                   1915:             }
                   1916:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1917:                                                         $safeeval);
                   1918:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1919:                 if ($language=~/\w/) {
                   1920:                     $available_texts{$language} = $result;
                   1921:                 }
1.427     bisitz   1922:             }
                   1923: 
1.397     albertel 1924: 	}
                   1925: 	return '';
                   1926:     }
1.500     foxr     1927: }				# end langauge block specific tags.
                   1928: 
1.397     albertel 1929: 
1.170     www      1930: sub start_instructorcomment {
1.201     albertel 1931:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1932: 
                   1933:     my $result;
                   1934: 
1.339     albertel 1935:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1936: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.468     raeburn  1937:         $result=($env{'request.role'}=~/^(in|cc|co|au|ca|li)/);
1.284     albertel 1938: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1939: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1940: 						   $parser,$style);
1.170     www      1941: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1942: 	}
                   1943: 	$result='';
                   1944:     } elsif ($target eq 'edit') {
                   1945: 	$result .=&Apache::edit::tag_start($target,$token);
                   1946: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1947:     }
                   1948:     return $result;
                   1949: }
                   1950: 
                   1951: sub end_instructorcomment {
1.159     albertel 1952:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1953:     my $result;
                   1954:     if ($target eq "edit") {
                   1955: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1956:     }
                   1957:     return $result;
1.4       tsai     1958: }
                   1959: 
                   1960: sub start_while {
1.326     albertel 1961:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1962: 
1.160     albertel 1963:     my $result;
1.339     albertel 1964:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1965: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1966: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1967: 
1.160     albertel 1968: 	push( @Apache::structuretags::whileconds, $code);
                   1969: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1970: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1971: 	}
                   1972: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1973: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1974: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1975: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1976: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1977: 	if ( $result ) {
                   1978: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1979: 	}
                   1980:     } elsif ($target eq 'edit') {
                   1981: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1982: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1983: 					  $token,40);
                   1984: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1985:     } elsif ($target eq 'modified') {
                   1986: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1987: 						     $safeeval,'condition');
                   1988: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1989:     }
1.160     albertel 1990:     return $result;
1.4       tsai     1991: }
                   1992: 
                   1993: sub end_while {
1.159     albertel 1994:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1995:     my $result;
                   1996: 
1.339     albertel 1997:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1998: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1999: 	my $code = pop(@Apache::structuretags::whileconds);
                   2000: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 2001: 	my $line = pop(@Apache::structuretags::whileline);
                   2002: 	my $return = &Apache::run::run($code,$safeeval);
                   2003: 	my $starttime=time;
                   2004: 	my $error=0;
                   2005: 	while ($return) {
                   2006: 	    if (time-$starttime >
                   2007: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 2008: 		$return = 0; $error=1; next;
1.161     albertel 2009: 	    }
                   2010: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 2011: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   2012: 		$target eq 'analyze') {
                   2013: 		# grade/answer/analyze should produce no output but if we
                   2014: 		# are redirecting, the redirecter should know what to do
                   2015: 		# with the output
                   2016: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   2017: 	    }
1.161     albertel 2018: 	    $return = &Apache::run::run($code,$safeeval);
                   2019: 	}
                   2020: 	if ($error) {
1.430     bisitz   2021: 	    &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 2022: 	}
                   2023:     } elsif ($target eq "edit") {
                   2024: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 2025:     }
1.160     albertel 2026:     return $result;
1.1       albertel 2027: }
1.6       tsai     2028: 
1.160     albertel 2029: # <randomlist show="1">
1.6       tsai     2030: #  <tag1>..</tag1>
                   2031: #  <tag2>..</tag2>
                   2032: #  <tag3>..</tag3>
1.160     albertel 2033: #  ...
1.6       tsai     2034: # </randomlist>
                   2035: sub start_randomlist {
1.326     albertel 2036:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2037:     my $result;
1.339     albertel 2038:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   2039: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 2040: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 2041: 	my $b_parser= HTML::LCParser->new(\$body);
                   2042: 	$b_parser->xml_mode(1);
                   2043: 	$b_parser->marked_sections(1);
1.159     albertel 2044: 	my $b_tok;
                   2045: 	my @randomlist;
                   2046: 	my $list_item;
                   2047: 	while($b_tok = $b_parser->get_token() ) {
                   2048: 	    if($b_tok->[0] eq 'S') { # start tag
                   2049: 		# get content of the tag until matching end tag
                   2050: 		# get all text upto the matching tag
                   2051: 		# and push the content into @randomlist
                   2052: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   2053: 							   $b_parser);
                   2054: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   2055: 		push(@randomlist,$list_item);
                   2056: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   2057:                 #         $list_item</b>";
                   2058: 	    }
                   2059: 	    if($b_tok->[0] eq 'T') { # text
                   2060: 		# what to do with text in between tags?
                   2061: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   2062: 	    }
                   2063: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   2064: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   2065: 	    # }
                   2066: 	}
1.303     albertel 2067: 	if (@randomlist) {
                   2068: 	    my @idx_arr = (0 .. $#randomlist);
                   2069: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   2070: 	    my $bodytext = '';
                   2071: 	    my $show=$#randomlist;
                   2072: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   2073: 	    $showarg--;
                   2074: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  2075:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   2076:                 my @currlist;
                   2077:                 my $part = $Apache::inputtags::part;
                   2078:                 if ($part ne '') {
                   2079:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   2080:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   2081:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   2082:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   2083:                         }
                   2084:                     } else {
                   2085:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   2086:                     }
                   2087:                 }
                   2088:             }
1.303     albertel 2089: 	    for(0 .. $show) {
                   2090: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   2091: 	    }
                   2092: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 2093: 	}
                   2094:     } elsif ($target eq 'edit' ) {
                   2095: 	$result .=&Apache::edit::tag_start($target,$token);
                   2096: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   2097: 					   $token,5);
                   2098: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2099:     } elsif ($target eq 'modified' ) {
                   2100: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2101: 						     $safeeval,'show');
                   2102: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2103:     }
                   2104:     return $result;
1.7       tsai     2105: }
                   2106: 
                   2107: sub shuffle {
                   2108:     my $a=shift;
                   2109:     my $i;
1.303     albertel 2110:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 2111: 	&Apache::response::pushrandomnumber();
1.159     albertel 2112: 	for($i=@$a;--$i;) {
                   2113: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   2114: 	    next if $i == $j;
                   2115: 	    @$a[$i,$j] = @$a[$j,$i];
                   2116: 	}
1.251     albertel 2117: 	&Apache::response::poprandomnumber();
1.7       tsai     2118:     }
1.6       tsai     2119: }
                   2120: 
                   2121: sub end_randomlist {
1.159     albertel 2122:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2123:     my $result;
                   2124:     if ($target eq 'edit' ) {
                   2125: 	$result=&Apache::edit::tag_end($target,$token,
                   2126: 				       'End Randomly Parsed Block');
                   2127:     }
                   2128:     return $result;
1.6       tsai     2129: }
                   2130: 
1.283     albertel 2131: sub ordered_show_check {
                   2132:     my $last_part=$Apache::inputtags::partlist[-2];
                   2133:     my $in_order=
                   2134: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   2135:     my $in_order_show=1;
                   2136:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   2137: 	$in_order_show=&Apache::response::check_status($last_part);
                   2138:     }
                   2139:     return $in_order_show;
                   2140: }
                   2141: 
1.469     www      2142: 
                   2143: sub start_startpartmarker {
                   2144:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2145:     my $result='';
                   2146:     if ($target eq 'edit') {
                   2147:         $result=&Apache::edit::tag_start($target,$token);
                   2148:         $result.=&mt('Marker for the start of a part. Place end marker below to wrap in-between tags into a new part.').'</td></tr>';
                   2149:         $result.=&Apache::edit::end_table();
                   2150: 
                   2151:     } 
                   2152:     return $result;
                   2153: }
                   2154: 
                   2155: sub end_startpartmarker {
                   2156:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2157:     my @result;
                   2158:     if ($target eq 'edit') { $result[1]='no'; }
                   2159:     return @result;
                   2160: }
                   2161: 
                   2162: sub start_endpartmarker {
                   2163:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2164:     my $result='';
                   2165:     if ($target eq 'edit') {
                   2166:         $result=&Apache::edit::tag_start($target,$token);
                   2167:         $result.=&mt('Marker for the end of a part. Place start marker above to wrap in-between tags into a new part.').'</td></tr>';
                   2168:         $result.=&Apache::edit::end_table();
                   2169: 
                   2170:     }
                   2171:     return $result;
                   2172: }
                   2173: 
                   2174: sub end_endpartmarker {
                   2175:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2176:     my @result;
                   2177:     if ($target eq 'edit') { $result[1]='no'; }
                   2178:     return @result;
                   2179: }
                   2180: 
                   2181: 
                   2182: 
                   2183: 
                   2184: 
1.11      albertel 2185: sub start_part {
1.326     albertel 2186:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 2187:     if (!$Apache::lonxml::metamode) {
                   2188: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   2189: 	                                     # duedates.
                   2190:     }
1.159     albertel 2191:     my $result='';
1.386     albertel 2192:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 2193:     $Apache::inputtags::part=$id;
1.177     albertel 2194:     push(@Apache::inputtags::partlist,$id);
                   2195:     @Apache::inputtags::response=();
1.159     albertel 2196:     @Apache::inputtags::previous=();
                   2197:     @Apache::inputtags::previous_version=();
1.405     albertel 2198:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 2199:     &Apache::response::reset_params();
                   2200: 
1.159     albertel 2201:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 2202:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   2203:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 2204:     my $in_order_show=&ordered_show_check();
1.214     albertel 2205:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 2206:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 2207:     &Apache::run::run($expression,$safeeval);
1.159     albertel 2208: 
                   2209:     if ($target eq 'meta') {
1.224     www      2210: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   2211: 	return &Apache::response::mandatory_part_meta.
                   2212: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 2213:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   2214: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 2215: 	if ($hidden || !$in_order_show) {
1.326     albertel 2216: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 2217: 	} else {
                   2218: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   2219: 	    push (@Apache::inputtags::status,$status);
                   2220: 	    my $expression='$external::datestatus="'.$status.'";';
                   2221: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   2222: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 2223: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 2224: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 2225: 	    }
1.216     albertel 2226: 	    if (( $status eq 'CLOSED' ) ||
                   2227: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 2228: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 2229: 		( $status eq 'BANNED') ||
                   2230: 		( $status eq 'UNAVAILABLE') ||
                   2231: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 2232: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   2233: 							   $style);
1.159     albertel 2234: 		if ( $target eq "web" ) {
1.211     albertel 2235: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 2236: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 2237: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 2238: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 2239: 		    } else {
1.211     albertel 2240: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 2241: 		    }
1.159     albertel 2242: 		}
                   2243: 	    } else {
                   2244: 		if ($target eq 'tex') {
1.284     albertel 2245: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 2246: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     2247: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 2248: 			} else {
                   2249: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   2250: 			}
1.195     sakharuk 2251: 		    }
1.159     albertel 2252: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 2253: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 2254: 		    my @allkeys = split /,/,$allkeys;
                   2255: 		    my $allow_print_points = 0;
                   2256: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 2257: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 2258: 			    if ($1 ne '0') {$allow_print_points=1;}
                   2259: 			}
                   2260: 		    }
1.275     albertel 2261: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   2262: 		    if (defined($maxtries) && $maxtries < 0) {
                   2263: 			$allow_print_points=0;
                   2264: 		    }
1.302     albertel 2265: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   2266: 				    '.disableexampointprint'}) eq 'yes') {
                   2267: 			$allow_print_points=0;
                   2268: 		    }
1.463     foxr     2269: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { 
1.492     christia 2270: 			$result .= '\vskip 10mm\fbox{\textit{'.&mt('[quant,_1,pt,pt]',$weight ).'}}';
1.463     foxr     2271: 
                   2272: 		    }
1.233     www      2273: 		} elsif ($target eq 'web') {
1.479     raeburn  2274:                     if ($status eq 'CAN_ANSWER') {
                   2275:                         my $problemstatus = &get_problem_status($Apache::inputtags::part); 
                   2276:                         my $probrandomize = &Apache::lonnet::EXT("resource.$Apache::inputtags::partlist[0].type");
                   2277:                         my $probrandtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::partlist[0].randomizeontries");
                   2278:                         my $num = scalar(@Apache::inputtags::partlist)-1;
                   2279:                         if ($probrandomize eq 'randomizetry') {
                   2280:                             if (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.type") ne 'randomizetry') {
                   2281:                                 $result .= &randomizetry_part_header($problemstatus,'none',$num);
                   2282:                             } else {
                   2283:                                 my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
                   2284:                                 if ($probrandtries ne $reqtries) {
                   2285:                                     $result .= &randomizetry_part_header($problemstatus,$reqtries,$num);
                   2286:                                 }
                   2287:                             }
                   2288:                         } elsif (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.type") eq 'randomizetry') {
                   2289:                             my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
                   2290:                             $result .= &randomizetry_part_header($problemstatus,$reqtries,$num);
                   2291:                         }
                   2292:                     }
1.475     raeburn  2293: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" ></a>';
1.159     albertel 2294: 		}
                   2295: 	    }
                   2296: 	}
                   2297:     } elsif ($target eq 'edit') {
                   2298: 	$result.=&Apache::edit::tag_start($target,$token);
                   2299: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   2300: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      2301: 	    '&nbsp;&nbsp;'.
                   2302: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 2303: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2304:     } elsif ($target eq 'modified') {
                   2305: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 2306: 						     $safeeval,'id','display');
1.159     albertel 2307: 	if ($constructtag) {
1.225     albertel 2308: 	    #limiting ids to only letters numbers, and space
1.224     www      2309: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 2310: 	    $result = &Apache::edit::rebuild_tag($token);
                   2311: 	}
                   2312:     }
                   2313:     return $result;
1.11      albertel 2314: }
                   2315: 
                   2316: sub end_part {
1.159     albertel 2317:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2318:     &Apache::lonxml::debug("in end_part $target ");
                   2319:     my $status=$Apache::inputtags::status['-1'];
                   2320:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 2321:     my $in_order_show=&ordered_show_check();
1.321     albertel 2322:     my $result;
                   2323:     if (!$Apache::lonxml::metamode) {
                   2324: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 2325: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 2326:     }
1.312     albertel 2327:     if ($target eq 'grade') {
1.249     albertel 2328: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 2329: 	    !$hidden && $in_order_show) {
1.311     foxr     2330: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 2331: 	} else {
                   2332: 	    # move any submission data to .hidden
                   2333: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   2334: 	}
1.283     albertel 2335:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   2336: 	     !$hidden && $in_order_show) {
1.159     albertel 2337: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   2338: 							$target);
1.490     raeburn  2339: 	if (($Apache::lonhomework::type eq 'exam' && $target eq 'tex') ||
                   2340:              ($env{'form.grade_imsexport'})) {
1.212     albertel 2341: 	    $gradestatus='';
                   2342: 	}
1.311     foxr     2343: 	$result.=$gradestatus;
1.265     sakharuk 2344: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 2345:     } elsif ($target eq 'edit') {
1.311     foxr     2346: 	$result.=&Apache::edit::end_table();
1.322     albertel 2347:     } elsif ($target eq 'modified') {
                   2348: 	 $result .= $token->[2];
1.159     albertel 2349:     }
                   2350:     pop @Apache::inputtags::status;
                   2351:     $Apache::inputtags::part='';
1.295     albertel 2352:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 2353:     return $result;
1.11      albertel 2354: }
1.1       albertel 2355: 
1.25      albertel 2356: sub start_preduedate {
1.326     albertel 2357:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 2358:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   2359: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 2360: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 2361: 	if (!$Apache::lonhomework::scantronmode &&
                   2362: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 2363: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   2364: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 2365: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 2366: 	}
1.24      albertel 2367:     }
1.159     albertel 2368:     return '';
1.24      albertel 2369: }
                   2370: 
1.25      albertel 2371: sub end_preduedate {
1.159     albertel 2372:     return '';
1.24      albertel 2373: }
                   2374: 
1.369     foxr     2375: # In all the modes where <postanswerdate> text is 
                   2376: # displayable,  all we do is eat up the text between the start/stop
                   2377: # tags if the conditions are not right to display it.
1.25      albertel 2378: sub start_postanswerdate {
1.326     albertel 2379:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     2380:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   2381: 	&Apache::lonnet::allowed('pav',
                   2382: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     2383:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     2384: 	$target eq 'tex' ) {
1.300     albertel 2385: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     2386: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   2387: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 2388: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 2389: 	}
                   2390:     }
                   2391:     return '';
1.24      albertel 2392: }
                   2393: 
1.25      albertel 2394: sub end_postanswerdate {
1.159     albertel 2395:     return '';
1.24      albertel 2396: }
                   2397: 
1.25      albertel 2398: sub start_notsolved {
1.326     albertel 2399:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2400:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 2401: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 2402: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   2403: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 2404: 	if ($gradestatus =~ /^correct/ &&
                   2405: 	    &Apache::response::show_answer()) {
1.159     albertel 2406: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 2407: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 2408: 	}
1.24      albertel 2409:     }
1.159     albertel 2410:     return '';
1.24      albertel 2411: }
                   2412: 
1.25      albertel 2413: sub end_notsolved {
1.159     albertel 2414:     return '';
1.24      albertel 2415: }
                   2416: 
                   2417: sub start_solved {
1.326     albertel 2418:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2419:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   2420: 	$target eq 'tex') {
                   2421: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 2422: 	if ($gradestatus !~ /^correct/ ||
                   2423: 	    !&Apache::response::show_answer()) {
1.326     albertel 2424: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 2425: 	}
1.24      albertel 2426:     }
1.159     albertel 2427:     return '';
1.24      albertel 2428: }
                   2429: 
                   2430: sub end_solved {
1.248     albertel 2431:     return '';
                   2432: }
                   2433: 
                   2434: sub start_problemtype {
1.326     albertel 2435:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 2436:     my $result;
1.339     albertel 2437:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   2438: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 2439: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   2440: 	if (!defined($mode)) { $mode='show'; }
                   2441: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   2442: 	my $found=0;
                   2443: 	foreach my $type (split(',',$for)) {
                   2444: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   2445: 	}
                   2446: 	if ($mode eq 'show' && !$found) {
1.326     albertel 2447: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 2448: 	}
                   2449: 	if ($mode eq 'hide' && $found) {
1.326     albertel 2450: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 2451: 	}
                   2452:     } elsif ($target eq 'edit') {
                   2453: 	$result .=&Apache::edit::tag_start($target,$token);
                   2454: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   2455: 					   [['show','Show'],
                   2456: 					    ['hide','Hide']]
                   2457: 					   ,$token);
                   2458: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   2459: 					     [ ['exam','Exam/Quiz Problem'],
                   2460: 					       ['survey','Survey'],
1.465     raeburn  2461:                                                ['surveycred','Survey (with credit)'],
                   2462:                                                ['anonsurvey','Anonymous Survey'],
                   2463:                                                ['anonsurveycred','Anonymous Survey (with credit)'],
1.428     raeburn  2464: 					       ['problem','Homework Problem'],
1.479     raeburn  2465:                                                ['practice','Practice Problem'],
                   2466:                                                ['randomizetry','New Randomization Each Try'] ]
1.248     albertel 2467: 					     ,$token);
                   2468: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2469:     } elsif ($target eq 'modified') {
                   2470: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2471: 						     $safeeval,'mode','for');
                   2472: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2473:     }
                   2474:     return $result;
                   2475: }
                   2476: 
                   2477: sub end_problemtype {
1.159     albertel 2478:     return '';
1.24      albertel 2479: }
1.34      albertel 2480: 
                   2481: sub start_startouttext {
1.159     albertel 2482:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2483:     my @result=(''.'');
                   2484:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 2485:     
                   2486:     my $nesting = 
                   2487: 	&Apache::lonxml::set_state('outtext',
                   2488: 				   &Apache::lonxml::get_state('outtext')+1);
                   2489:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   2490: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   2491:     }
1.159     albertel 2492:     return (@result);
1.34      albertel 2493: }
1.159     albertel 2494: 
1.34      albertel 2495: sub end_startouttext {
1.326     albertel 2496:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2497:     my $result='';
                   2498:     my $text='';
                   2499:     if ($target eq 'edit') {
1.424     foxr     2500: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 2501: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437     raeburn  2502: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
1.438     bisitz   2503:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  2504:                  .&Apache::edit::deletelist($target,$token)
1.474     raeburn  2505:                  .'</span></td>'
                   2506: 	         .'<td align="left"><span id="math_'.$areaid.'" />'
                   2507: 		 .&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   2508: 		 .'<span></td>'
                   2509: 		 .'<td>'
                   2510: 		 .&Apache::edit::insertlist($target,$token)
                   2511: 		 .'</td>'
                   2512: 	         .'<td align="right" valign="top">' .
                   2513: 	         &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 2514: 		 &Apache::edit::end_row().
1.362     albertel 2515:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      2516: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 2517:     }
                   2518:     if ($target eq 'modified') {
1.219     albertel 2519: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 2520:     }
                   2521:     if ($target eq 'tex') {
                   2522: 	$result .= '\noindent ';
                   2523:     }
                   2524:     return $result;
1.34      albertel 2525: }
1.159     albertel 2526: 
1.34      albertel 2527: sub start_endouttext {
1.159     albertel 2528:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2529:     my $result='';
                   2530:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   2531:     if ($target eq "modified") {
                   2532: 	$result='<endouttext />'.
1.377     albertel 2533: 	    &Apache::edit::handle_insertafter('startouttext');
                   2534:     }
1.404     albertel 2535: 
                   2536:     my $nesting = 
                   2537: 	&Apache::lonxml::set_state('outtext',
                   2538: 				   &Apache::lonxml::get_state('outtext')-1);
                   2539:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2540: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2541: 	&Apache::lonxml::set_state('outtext', 0);
                   2542:     }
1.159     albertel 2543:     return $result;
1.34      albertel 2544: }
1.159     albertel 2545: 
1.34      albertel 2546: sub end_endouttext {
1.159     albertel 2547:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2548:     my @result=('','');
                   2549:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2550:     return (@result);
1.34      albertel 2551: }
1.159     albertel 2552: 
1.45      albertel 2553: sub delete_startouttext {
1.326     albertel 2554:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2555:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2556:     my $text=$$parser['-1']->get_text("/endouttext");
                   2557:     my $ntoken=$$parser['-1']->get_token();
                   2558:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2559:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2560:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2561:     # they did the last time round
                   2562:     &Apache::lonxml::increasedepth($ntoken);
                   2563:     &Apache::lonxml::decreasedepth($ntoken);
                   2564:     return 1;
1.193     www      2565: }
                   2566: 
                   2567: sub start_simpleeditbutton {
                   2568:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2569:     my $result='';
1.284     albertel 2570:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2571: 	($target eq 'web') &&
1.330     albertel 2572:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2573:         my $url=$env{'request.noversionuri'};
1.193     www      2574:         $url=~s/\?.*$//;
1.367     albertel 2575: 	my ($symb) = &Apache::lonnet::whichuser();
1.451     bisitz   2576: #       Warning makes more sense and is more important on edit screen
1.442     bisitz   2577: #       $result='<p class="LC_warning">'
                   2578: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
                   2579: #              .&Apache::loncommon::help_open_topic('Caching')
                   2580: #              .'</p>';
1.486     www      2581:         $result.=&Apache::loncommon::head_subbox(
                   2582:                  &Apache::lonhtmlcommon::start_funclist()
1.451     bisitz   2583:                 .&Apache::lonhtmlcommon::add_item_funclist(
                   2584:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'
                   2585:                     .&mt('Edit').'</a>')
1.486     www      2586:                 .&Apache::lonhtmlcommon::end_funclist());
1.442     bisitz   2587: 
1.193     www      2588:     }
                   2589:     return $result;
                   2590: }
                   2591: 
                   2592: sub end_simpleeditbutton {
                   2593:     return '';
1.45      albertel 2594: }
1.34      albertel 2595: 
1.428     raeburn  2596: sub practice_problem_header {
                   2597:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2598:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2599:            '</span>';
                   2600: }
                   2601: 
1.479     raeburn  2602: sub randomizetry_problem_header {
                   2603:     my ($problemstatus,$reqtries) = @_;
                   2604:     my ($header,$text);
                   2605:     if ($reqtries > 1) {
                   2606:         $header = &mt('New Problem Variation After Every [quant,_1,Try,Tries]',$reqtries);
                   2607:         if (($problemstatus eq 'no') ||
                   2608:             ($problemstatus eq 'no_feedback_ever')) {
                   2609:             $text = &mt('A new variation will be generated after every [quant,_1,try,tries], until the tries limit is reached.',$reqtries);
                   2610:         } else {
                   2611:             $text = &mt('A new variation will be generated after every [quant,_1,try,tries], until correct or tries limit is reached.',$reqtries);
                   2612:         }
                   2613:     } else {
                   2614:         $header = &mt('New Problem Variation Each Try');
                   2615:         if (($problemstatus eq 'no') ||
                   2616:             ($problemstatus eq 'no_feedback_ever')) {
                   2617:             $text = &mt('A new variation will be generated after each try until the tries limit is reached.');
                   2618: 
                   2619:         } else {
                   2620:             $text = &mt('A new variation will be generated after each try until correct or tries limit is reached.');
                   2621:         }
                   2622:     }
                   2623:     return '<span class="LC_info"><h3>'.$header.'</h3></span>'.
                   2624:            '<span class="LC_info">'.$text.'</span><hr />';
                   2625: }
                   2626: 
                   2627: sub randomizetry_part_header {
                   2628:     my ($problemstatus,$reqtries,$num) = @_;
                   2629:     my ($header,$text);
                   2630:     if ($reqtries eq 'none') {
                   2631:         $header = &mt('No Question Variation');
                   2632:         $text = &mt('For this question there will no new variation after a try.');
                   2633:     } elsif ($reqtries > 1) {
                   2634:         $header = &mt('New Question Variation After Every [quant,_1,Try,Tries]',$reqtries);
                   2635:         if (($problemstatus eq 'no') ||
                   2636:             ($problemstatus eq 'no_feedback_ever')) {
                   2637:             $text = &mt('For this question a new variation will be generated after every [quant,_1,try,tries], until the tries limit is reached.',$reqtries);
                   2638:         } else {
                   2639:             $text = &mt('For this question a new variation will be generated after every [quant,_1,try,tries], until correct or tries limit is reached.',$reqtries);
                   2640:         }
                   2641:     } else {
                   2642:         $header = &mt('New Question Variation For Each Try');
                   2643:         if (($problemstatus eq 'no') ||
                   2644:             ($problemstatus eq 'no_feedback_ever')) {
                   2645:             $text =  &mt('For this question a new variation will be generated after each try until the tries limit is reached.');
                   2646:         } else {
                   2647:             $text = &mt('For this question a new variation will be generated after each try until correct or tries limit is reached.');
                   2648:         }
                   2649:     }
                   2650:     my $output;
                   2651:     if ($num > 1) {
                   2652:         $output .= '<hr />';
                   2653:     }
                   2654:     $output .=  '<span class="LC_info"><h4>'.$header.'</h4></span>'.
                   2655:                   '<span class="LC_info">'.$text.'</span><br /><br />';
                   2656:     return $output;
                   2657: }
                   2658: 
1.1       albertel 2659: 1;
                   2660: __END__
1.435     jms      2661: 
                   2662: =pod
                   2663: 
                   2664: =back
                   2665: 
                   2666: =cut

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