Annotation of loncom/homework/structuretags.pm, revision 1.512.2.12

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.512.2.12! raeburn     4: # $Id: structuretags.pm,v 1.512.2.11 2016/09/14 19:36:30 raeburn Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.254     www        28: ###
1.54      www        29: 
1.435     jms        30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
                     34: Apache::structuretags
                     35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: 
                     39: This is part of the LearningOnline Network with CAPA project
                     40: described at http://www.lon-capa.org.
                     41: 
                     42: 
                     43: =head1 NOTABLE SUBROUTINES
                     44: 
                     45: =over
                     46: 
                     47: =item 
                     48: 
                     49: =back
                     50: 
                     51: =cut
                     52: 
1.133     sakharuk   53: 
1.1       albertel   54: package Apache::structuretags; 
                     55: 
                     56: use strict;
                     57: use Apache::lonnet;
1.101     sakharuk   58: use Apache::File();
1.147     www        59: use Apache::lonmenu;
1.210     albertel   60: use Apache::lonlocal;
1.231     sakharuk   61: use Apache::lonxml;
1.434     foxr       62: use Apache::londefdef;
1.338     albertel   63: use Apache::lonenc();
1.500     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 $result;;
1.10      albertel  220: }
                    221: 
                    222: sub end_tex {
1.44      ng        223:     return '';
1.9       albertel  224: }
                    225: 
1.400     albertel  226: sub homework_js {
1.512.2.9  raeburn   227:     my ($postsubmit,$timeout);
                    228:     if (($env{'request.course.id'}) && ($env{'request.state'} ne 'construct')) {
                    229:         my $crstype;
                    230:         if (&Apache::loncommon::course_type() eq 'Community') {
                    231:             $crstype = 'community';
                    232:         } else {
                    233:             if ($env{'course.'.$env{'request.course.id'}.'.internal.coursecode'}) {
                    234:                 $crstype = 'official';
                    235:             } elsif ($env{'course.'.$env{'request.course.id'}.'.internal.textbook'}) {
                    236:                 $crstype = 'textbook';
                    237:             } else {
                    238:                 $crstype = 'unofficial';
                    239:             }
                    240:         }
                    241:         $postsubmit = $env{'course.'.$env{'request.course.id'}.'.internal.postsubmit'};
                    242:         if ($postsubmit eq '') {
                    243:             my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'});
                    244:             $postsubmit = $domdefs{'postsubmit'};
                    245:             unless ($postsubmit eq 'off') {
                    246:                 $timeout = $domdefs{$crstype.'postsubtimeout'};
                    247:             }
                    248:         } elsif ($postsubmit eq '0') {
                    249:             $postsubmit = 'off';
                    250:         } elsif ($postsubmit eq '1') {
                    251:             $postsubmit = 'on';
                    252:             $timeout = $env{'course.'.$env{'request.course.id'}.'.internal.postsubtimeout'};
                    253:             if ($timeout eq '') {
                    254:                 my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'});
                    255:                 $timeout = $domdefs{$crstype.'postsubtimeout'};
                    256:             }
                    257:         }
                    258:         if ($timeout eq '') {
                    259:             $timeout = 60;
                    260:         }
                    261:     } else {
                    262:         my %domdefs = &Apache::lonnet::get_domain_defaults($env{'request.role.domain'});
                    263:         $postsubmit = $domdefs{'postsubmit'};
                    264:         unless ($postsubmit eq 'off') {
                    265:             $timeout = 60;
                    266:         }
                    267:     }
                    268:     my $jstimeout = 0;
                    269:     if ($timeout) {
                    270:         $jstimeout = 1000 * $timeout;
                    271:     }
1.400     albertel  272:     return &Apache::loncommon::resize_textarea_js().
1.512.2.11  raeburn   273:            &Apache::loncommon::colorfuleditor_js().
1.416     raeburn   274:            &setmode_javascript().
1.512.2.9  raeburn   275: 	<<"JS";
1.400     albertel  276: <script type="text/javascript">
1.483     raeburn   277: // <![CDATA[
1.494     raeburn   278: function setSubmittedPart (part,prefix) {
                    279:     if (typeof(prefix) == 'undefined') {
                    280:         this.document.lonhomework.submitted.value="part_"+part;
                    281:     } else {
                    282:         for (var i=0;i<this.document.lonhomework.elements.length;i++) {
                    283:             if (this.document.lonhomework.elements[i].name == prefix+'submitted') {
                    284:                 this.document.lonhomework.elements[i].value="part_"+part;
                    285:             }
                    286:         }
                    287:     }
1.400     albertel  288: }
                    289: 
1.512.2.9  raeburn   290: function disableAutoComplete (id) {
                    291:     var field = document.getElementById(id);
                    292:     if (field != null && field != undefined){
                    293:         if ('autocomplete' in field) {
                    294:             field.autocomplete = "off";
                    295:         } else {
                    296:             field.setAttribute("autocomplete", "off");
                    297:         }
                    298:     }
                    299: }
                    300: 
1.400     albertel  301: function image_response_click (which, e) {
                    302:     init_geometry();
                    303:     if (!e) { e = window.event; } //IE
                    304:     var input_element = document.lonhomework.elements[which];
1.401     albertel  305:     var token_element = document.lonhomework.elements[which+'_token'];
1.400     albertel  306:     var token = token_element.value;
1.401     albertel  307:     var img_element   = document.getElementById(which+'_imageresponse');
1.400     albertel  308:     var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
                    309:     var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
                    310:     var click = x+':'+y;
                    311:     input_element.value = click;
1.485     raeburn   312:     img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
1.400     albertel  313: }
1.512.2.9  raeburn   314: 
                    315: var submithandled = 0;
                    316: var keypresshandled = 0;
                    317: var postsubmit = '$postsubmit';
                    318: 
                    319: \$(document).ready(function(){
                    320:   if (postsubmit != 'off') {
                    321:     \$(document).keypress(function(event){
                    322:         var keycode = (event.keyCode ? event.keyCode : event.which);
                    323:         if ((keycode == '13') && (keypresshandled == 0)) {
                    324:             if ( \$( document.activeElement ).hasClass("LC_textline") ) {
                    325:                 keypresshandled = 1;
                    326:                 var idsArray = \$( document.activeElement ).attr("id").split(/HWVAL_/);
                    327:                 if (idsArray.length) {
                    328:                     event.preventDefault();
                    329:                     var itemsArray = idsArray[1].split(/_/);
                    330:                     var buttonId = idsArray[0]+'submit_'+itemsArray[0];
                    331:                     \$("#"+buttonId).trigger("click");
                    332:                 }
                    333:             }
                    334:         }
                    335:     });
                    336: 
                    337:     \$(document).delegate('form :submit', 'click', function( event ) {
                    338:         if ( \$( this ).hasClass( "LC_hwk_submit" ) ) {
                    339:             var buttonId = this.id;
                    340:             var timeout = $jstimeout;
                    341:             if (submithandled == 0) {
                    342:                 submithandled = 1;
                    343:                 \$( "#msg_"+buttonId ).css({"display": "inline","background-color": "#87cefa",
                    344:                                            "color": "black","padding": "2px"}) ;
                    345:                 if (( \$(this.form).id == "LC_page" ) && (\$('input[name="all_submit"]').length )) {
                    346:                     if (buttonId != "all_submit") {
                    347:                         \$( ".LC_status_"+buttonId ).hide();
                    348:                         if (( "#"+buttonId+"_pressed" ).length) {
                    349:                             \$( "#"+buttonId+"_pressed" ).val( "1" );
                    350:                         }
                    351:                     }
                    352:                 } else {
                    353:                     \$( ".LC_status_"+buttonId ).hide();
                    354:                 }
                    355:                 \$(this.form).submit();
                    356:                 \$( ".LC_hwk_submit" ).prop( "disabled", true);
                    357:                 \$( ".LC_textline" ).prop( "readonly", "readonly");
                    358:                 event.preventDefault();
                    359: 
                    360:                 if (timeout > 0) {
                    361:                     setTimeout(function(){
                    362:                                        \$( "#msg_"+buttonId ).css({"display": "none"});
                    363:                                        if (( \$(this.form).id == "LC_page" ) && (\$('input[name="all_submit"]').length )) {
                    364:                                            if (buttonId != "all_submit") {
                    365:                                                if (( "#"+buttonId+"_pressed" ).length) {
                    366:                                                    \$( "#"+buttonId+"_pressed" ).val( "" );
                    367:                                                }
                    368:                                            }
                    369:                                        }
                    370:                                        \$( ".LC_hwk_submit" ).prop( "disabled", false);
                    371:                                        \$( ".LC_textline" ).prop( "readonly", false);
                    372:                                        submithandled = 0;
                    373:                                        keypresshandled = 0;
                    374:                                      }, timeout);
                    375:                 }
                    376:                 return true;
                    377:             }
                    378:         }
                    379:     });
                    380:   }
                    381: });
                    382: 
1.483     raeburn   383: // ]]>
1.400     albertel  384: </script>
                    385: JS
                    386: }
                    387: 
1.416     raeburn   388: sub setmode_javascript {
                    389:     return <<"ENDSCRIPT";
                    390: <script type="text/javascript">
1.485     raeburn   391: // <![CDATA[
1.416     raeburn   392: function setmode(form,probmode) {
                    393:     form.problemmode.value = probmode;
                    394:     form.submit();
                    395: }
1.485     raeburn   396: // ]]>
1.416     raeburn   397: </script>
                    398: ENDSCRIPT
                    399: }
                    400: 
1.48      albertel  401: sub page_start {
1.345     albertel  402:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                    403: 	$extra_head)=@_;
1.159     albertel  404:     my %found;
1.207     albertel  405:     foreach my $taginside (@$tagstack) {
1.159     albertel  406: 	foreach my $taglookedfor ('html','body','form') {
                    407: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    408: 	}
                    409:     }
                    410: 
1.343     albertel  411:     if ($target eq 'tex') {
                    412: 	return
                    413: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                    414: 					   $parstack,$parser,$safeeval);
                    415:     }
                    416: 
1.474     raeburn   417:     $extra_head .= &homework_js().
                    418:                    &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
                    419:     if (&Apache::lonhtmlcommon::htmlareabrowser()) {
1.512.2.12! raeburn   420:         my %textarea_args;
        !           421:         if (($env{'request.state'} ne 'construct') ||
        !           422:             ($env{'environment.nocodemirror'})) {
        !           423:             %textarea_args = (
1.474     raeburn   424:                                 dragmath => 'math',
                    425:                               );
1.512.2.12! raeburn   426:         }
1.474     raeburn   427:         $extra_head .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
1.425     raeburn   428:     }
1.478     raeburn   429:     my $is_task = ($env{'request.uri'} =~ /\.task$/);
1.512.2.9  raeburn   430:     my ($needs_upload,$partlist);
1.495     raeburn   431:     my ($symb)= &Apache::lonnet::whichuser();
                    432:     my ($map,$resid,$resurl)=&Apache::lonnet::decode_symb($symb);
1.478     raeburn   433:     if ($is_task) {
1.495     raeburn   434:         $extra_head .= &Apache::lonhtmlcommon::file_submissionchk_js();
1.493     raeburn   435:     } else {
                    436:         if (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.uploadedfiletypes") ne '') {
1.495     raeburn   437:             unless ($env{'request.state'} eq 'construct') {
                    438:                 my $navmap = Apache::lonnavmaps::navmap->new();
                    439:                 if (ref($navmap)) {
                    440:                     my $mapres = $navmap->getResourceByUrl($map);
1.496     raeburn   441:                     my $is_page;
                    442:                     if (ref($mapres)) {
                    443:                         $is_page = $mapres->is_page();
                    444:                     }
                    445:                     unless ($is_page) {
1.495     raeburn   446:                         $needs_upload = 1;
                    447:                     }
1.512.2.9  raeburn   448:                     if ((ref($tagstack) eq 'ARRAY') && ($tagstack->[-1] eq 'problem')) {
                    449:                         my $res = $navmap->getBySymb($symb);
                    450:                         if (ref($res)) {
                    451:                             $partlist = $res->parts();
                    452:                         }
                    453:                     }
1.495     raeburn   454:                 }
                    455:             }
1.493     raeburn   456:         } else {
                    457:             unless ($env{'request.state'} eq 'construct') {
                    458:                 my $navmap = Apache::lonnavmaps::navmap->new();
                    459:                 if (ref($navmap)) {
1.495     raeburn   460:                     my $mapres = $navmap->getResourceByUrl($map);
1.496     raeburn   461:                     my $is_page;
                    462:                     if (ref($mapres)) {
                    463:                         $is_page = $mapres->is_page();
                    464:                     }
1.512.2.9  raeburn   465:                     if ($is_page) {
                    466:                         if ((ref($tagstack) eq 'ARRAY') && ($tagstack->[-1] eq 'problem')) {
                    467:                             my $res = $navmap->getBySymb($symb);
                    468:                             if (ref($res)) {
                    469:                                 $partlist = $res->parts();
                    470:                             }
                    471:                         }
                    472:                     } else {
1.495     raeburn   473:                         my $res = $navmap->getBySymb($symb);
                    474:                         if (ref($res)) {
1.512.2.9  raeburn   475:                             $partlist = $res->parts();
1.495     raeburn   476:                             if (ref($partlist) eq 'ARRAY') {
                    477:                                 foreach my $part (@{$partlist}) {
                    478:                                     my @types = $res->responseType($part);
                    479:                                     my @ids = $res->responseIds($part);
                    480:                                     for (my $i=0; $i < scalar(@ids); $i++) {
                    481:                                         if ($types[$i] eq 'essay') {
                    482:                                             my $partid = $part.'_'.$ids[$i];
                    483:                                             if (&Apache::lonnet::EXT("resource.$partid.uploadedfiletypes") ne '') {
                    484:                                                 $needs_upload = 1;
                    485:                                                 last;
                    486:                                             }
1.493     raeburn   487:                                         }
                    488:                                     }
                    489:                                 }
1.495     raeburn   490:                             } 
                    491:                         }
1.493     raeburn   492:                     }
                    493:                 }
                    494:             }
                    495:         }
1.495     raeburn   496:         if ($needs_upload) {
                    497:             $extra_head .= &Apache::lonhtmlcommon::file_submissionchk_js();
                    498:         }
1.478     raeburn   499:     }
1.425     raeburn   500: 
1.344     albertel  501:     my %body_args;
                    502:     if (defined($found{'html'})) {
                    503: 	$body_args{'skip_phases'}{'head'}=1;
                    504:     } else {
1.343     albertel  505: 	
1.345     albertel  506: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel  507: 
1.379     albertel  508: 	$extra_head .= &Apache::londefdef::generate_css_links();
                    509: 
1.384     albertel  510: 	if ($env{'request.state'} eq 'construct') {
1.343     albertel  511: 	    $extra_head.=&Apache::edit::js_change_detection().
                    512: 		"<script type=\"text/javascript\">\n".
                    513: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    514: 		&Apache::loncommon::browser_and_searcher_javascript().
                    515:                 "\n</script>\n";
1.512.2.9  raeburn   516:             if ($target eq 'edit') {
                    517:                 $extra_head .= &Apache::edit::js_update_linknum();
                    518:             }
1.343     albertel  519: 	}
1.159     albertel  520:     }
1.343     albertel  521: 
1.446     bisitz    522:     my $pageheader = '';
1.344     albertel  523:     if (defined($found{'body'})) {
                    524: 	$body_args{'skip_phases'}{'body'}=1;
                    525:     } elsif (!defined($found{'body'}) 
                    526: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  527: 	if ($target eq 'web' || $target eq 'edit') {
1.512.2.3  raeburn   528:         # Breadcrumbs for Authoring Space
1.450     bisitz    529:         &Apache::lonhtmlcommon::clear_breadcrumbs();
                    530:         &Apache::lonhtmlcommon::add_breadcrumb({
1.512.2.3  raeburn   531:             'text'  => 'Authoring Space',
1.497     raeburn   532:             'href'  => &Apache::loncommon::authorspace($env{'request.uri'}),
1.450     bisitz    533:         });
1.460     droeschl  534:         # breadcrumbs (and tools) will be created 
                    535:         # in start_page->bodytag->innerregister
                    536: 
1.450     bisitz    537: # FIXME Where are we?
                    538: #        &Apache::lonhtmlcommon::add_breadcrumb({
                    539: #            'text'  => 'Problem Editing', # 'Problem Testing'
                    540: #            'href'  => '',
                    541: #        });
1.460     droeschl  542:         $pageheader =&Apache::loncommon::head_subbox(
1.446     bisitz    543:                 &Apache::loncommon::CSTR_pageheader());
1.297     albertel  544: 	}
1.272     albertel  545:     } elsif (!defined($found{'body'})) {
1.343     albertel  546: 	my %add_entries;
1.159     albertel  547: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    548: 						  $safeeval);
1.343     albertel  549: 	if ($background ne '' ) {
                    550: 	    $add_entries{'background'} = $background;
                    551: 	}
1.344     albertel  552: 
1.290     albertel  553: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    554: 					       $safeeval);
1.446     bisitz    555:         if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
1.344     albertel  556: 
1.446     bisitz    557:         $body_args{'bgcolor'}        = $bgcolor;
                    558:         # $body_args{'no_title'}       = 1;
                    559:         $body_args{'force_register'} = 1;
                    560:         $body_args{'add_entries'}    = \%add_entries;
1.466     droeschl  561:         if ( $env{'request.state'} eq   'construct') {
1.446     bisitz    562:             $body_args{'only_body'}  = 1;
1.512.2.7  raeburn   563:         } elsif ($target eq 'web') {
                    564:             $body_args{'print_suppress'} = 1;
1.446     bisitz    565:         }
1.344     albertel  566:     }
1.365     albertel  567:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  568:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    569: 						    \%body_args);
1.446     bisitz    570:     $page_start .= $pageheader;
1.462     raeburn   571:     if (!defined($found{'body'}) 
                    572: 	&& $env{'request.state'} ne 'construct'
                    573: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    574: 
                    575: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
                    576:         if ($symb eq '' && !$publicuser) {
                    577:             $page_start .= '<p class="LC_info">'
                    578:                           .&mt('Browsing resource, all submissions are temporary.')
                    579:                           .'</p>';
1.457     bisitz    580:         }
1.344     albertel  581:     }
                    582: 
1.409     albertel  583:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  584: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  585:     }
                    586:     my $form_tag_start;
                    587:     if (!defined($found{'form'})) {
1.337     albertel  588: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.465     raeburn   589: 	my $uri = &Apache::loncommon::inhibit_menu_check(
1.455     droeschl  590:                 &Apache::lonenc::check_encrypt($env{'request.uri'}));
1.464     raeburn   591:         $uri = &HTML::Entities::encode($uri,'<>&"');
1.327     albertel  592: 	$form_tag_start.=$uri.'" ';
                    593: 	if ($target eq 'edit') {
                    594: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    595: 	}
1.493     raeburn   596:         my ($symb,$courseid,$udom,$uname)=&Apache::lonnet::whichuser();
                    597:         my ($path,$multiresp) = 
                    598:             &Apache::loncommon::get_turnedin_filepath($symb,$uname,$udom);
1.495     raeburn   599:         if (($is_task) || ($needs_upload)) {
                    600:             $form_tag_start .= ' onsubmit="return file_submission_check(this,'."'$path','$multiresp'".');"';
1.478     raeburn   601:         }
1.368     albertel  602: 	$form_tag_start.='>'."\n";
1.355     albertel  603: 
                    604: 	if ($symb =~ /\S/) {
                    605: 	    $symb=
                    606: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    607: 	    $form_tag_start.=
1.368     albertel  608: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  609: 	}
1.159     albertel  610:     }
1.512.2.9  raeburn   611:     return ($page_start,$form_tag_start,$partlist);
1.105     albertel  612: }
                    613: 
1.141     matthew   614: #use Time::HiRes();
1.105     albertel  615: sub get_resource_name {
1.159     albertel  616:     my ($parstack,$safeeval)=@_;
1.388     foxr      617:     my $name;
1.204     albertel  618:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      619: 	$name = $Apache::lonhomework::name;
                    620:     } else {
                    621: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  622: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      623: 	if ($name eq '') {
                    624: 	    $name=&Apache::lonnet::EXT('resource.title');
                    625: 	    if ($name eq 'con_lost') { $name = ''; }
                    626: 	}
                    627: 	if ($name!~/\S+/) {
                    628: 	    $name=$env{'request.uri'};
                    629: 	    $name=~s-.*/([^/]+)$-$1-;
                    630: 	}
                    631: 	# The name has had html tags escaped:
                    632:        
                    633: 	$name=~s/&lt;/</gs;
                    634: 	$name=~s/&gt;/>/gs;
                    635: 
                    636: 	$Apache::lonhomework::name=$name;
1.204     albertel  637:     }
1.159     albertel  638:     return $name;
1.105     albertel  639: }
                    640: 
                    641: sub setup_rndseed {
1.512.2.9  raeburn   642:     my ($safeeval,$target,$probpartlist)=@_;
1.367     albertel  643:     my ($symb)=&Apache::lonnet::whichuser();
1.479     raeburn   644:     my ($questiontype,$set_safespace,$rndseed);
                    645:     if ($target eq 'analyze') {
                    646:         $questiontype = $env{'form.grade_questiontype'};
                    647:     }
                    648:     unless (defined($questiontype)) {
                    649:         $questiontype = $Apache::lonhomework::type;
                    650:     }
1.333     albertel  651:     if ($env{'request.state'} eq "construct" 
                    652: 	|| $symb eq '' 
                    653: 	|| $Apache::lonhomework::type eq 'practice'
                    654: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       655: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  656: 						['rndseed']);
1.284     albertel  657: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  658: 	if (!$rndseed) {
1.162     albertel  659: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    660: 	    if (!$rndseed) {
                    661: 		$rndseed=time;
                    662: 	    }
1.284     albertel  663: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  664: 	}
1.479     raeburn   665:         if (($env{'request.state'} eq "construct") && 
                    666:             ($Apache::lonhomework::type eq 'randomizetry')) {
                    667:             my $tries = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.tries"};
                    668:             if ($tries) {
                    669:                 $rndseed += $tries;
                    670:             }
1.480     raeburn   671:             $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed;
1.479     raeburn   672:         }
1.374     albertel  673: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    674: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  675: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  676: 	    srand(time);
                    677: 	    $rndseed=int(rand(2100000000));
1.284     albertel  678: 	    $env{'form.rndseed'}=$rndseed;
                    679: 	    delete($env{'form.resetdata'});
                    680: 	    delete($env{'form.newrandomization'});
1.159     albertel  681: 	}
1.488     www       682:         $rndseed=~s/\,/\:/g;
                    683:         $rndseed=~s/[^\w\d\:\-]//g;
1.489     www       684: 	if (defined($rndseed)) {
                    685:             my ($c1,$c2)=split(/\:/,$rndseed);
                    686:             unless ($c2) { $c2=0; }
                    687:             unless (($c1==int($c1)) && ($c2==int($c2))) {
                    688: 	       $rndseed=join(':',&Apache::lonnet::digest($rndseed));
                    689:             }
1.187     albertel  690:         }
1.247     albertel  691:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    692: 	   $rndseed=&Apache::lonnet::rndseed();
                    693: 	}
1.479     raeburn   694:         $set_safespace = 1;
                    695:     } elsif ($questiontype eq 'randomizetry') {
                    696:         if ($target eq 'analyze') {
                    697:             if (defined($env{'form.grade_rndseed'})) {
                    698:                 $rndseed = $env{'form.grade_rndseed'};
                    699:             }
                    700:         }
                    701:         unless (($target eq 'analyze') && (defined($rndseed))) {
                    702:             $rndseed=&Apache::lonnet::rndseed();
1.512.2.9  raeburn   703:             my $partfortries = $Apache::inputtags::part;
                    704:             if (ref($probpartlist) eq 'ARRAY') {
                    705:                 if ((@{$probpartlist} == 1) && ($probpartlist->[0] ne $Apache::inputtags::part)) {
                    706:                     $partfortries = $probpartlist->[0];
                    707:                 }
                    708:             }
                    709:             my $curr_try = $Apache::lonhomework::history{"resource.$partfortries.tries"};
1.479     raeburn   710:             if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                    711:                 $curr_try ++;
                    712:             }
                    713:             if ($rndseed =~/^(\d+)[,:](\d+)$/) {
                    714:                 $rndseed = $1;
                    715:             }
                    716:             if ($curr_try) {
1.512.2.9  raeburn   717:                 my $reqtries = &Apache::lonnet::EXT("resource.$partfortries.randomizeontries");
1.479     raeburn   718:                 if (($reqtries =~ /^\d+$/) && ($reqtries > 1)) {
                    719:                     my $inc = int(($curr_try-1)/$reqtries);
                    720:                     $rndseed += $inc;
                    721:                 } else {
                    722:                     $rndseed += $curr_try;
                    723:                 }
                    724:             }
                    725:         }
                    726:         $set_safespace = 1;
1.512.2.9  raeburn   727:         if ($target eq 'grade') {
                    728:             $Apache::lonhomework::rawrndseed = $rndseed;
                    729:         }
1.479     raeburn   730:     }
                    731:     if ($set_safespace) {
                    732:         if ($safeeval) {
                    733:             &Apache::lonxml::debug("Setting rndseed to $rndseed");
                    734:             &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
                    735:         }
                    736:     }
                    737:     unless (($env{'request.state'} eq "construct") || ($symb eq '')) {
                    738:         $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed;
1.159     albertel  739:     }
                    740:     return $rndseed;
1.105     albertel  741: }
                    742: 
1.268     albertel  743: sub remember_problem_state {
                    744:     return '
1.284     albertel  745:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    746:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    747:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  748: }
                    749: 
1.487     www       750: sub problem_edit_action_button {
                    751:     my ($name,$action,$accesskey,$text,$flag)=@_;
                    752:     my $actionscript="setmode(this.form,'$action')";
                    753:     return "\n<input type='button' name='$name' accesskey='$accesskey' value='".&mt($text)."'".
                    754:            ($flag?&Apache::edit::submit_ask_anyway($actionscript):&Apache::edit::submit_dont_ask($actionscript))." />";
                    755: }
                    756: 
1.423     www       757: sub problem_edit_buttons {
1.487     www       758:    my ($mode)=@_;
1.512.2.11  raeburn   759: # Buttons that save
                    760:    my $result = '<div style="float:right">';
                    761:    if ($mode eq 'editxml') {
                    762:        $result.=&problem_edit_action_button('subsaveedit','saveeditxml','s','Save and EditXML');
                    763:        $result.=&problem_edit_action_button('subsaveview','saveviewxml','v','Save and View');
                    764:    } else {
                    765:        $result.=&problem_edit_action_button('subsaveedit','saveedit','s','Save and Edit');
                    766:        $result.=&problem_edit_action_button('subsaveview','saveview','v','Save and View');
                    767:    }
                    768:    $result.="\n</div>\n";
1.487     www       769: # Buttons that do not save
1.512.2.11  raeburn   770:    $result .= '<div>'.
1.487     www       771:               &problem_edit_action_button('subdiscview','discard','d','Discard Edits and View',1);
                    772:    if ($mode eq 'editxml') {
                    773:        $result.=&problem_edit_action_button('subedit','edit','e','Edit',1);
                    774:        $result.=&problem_edit_action_button('subundo','undoxml','u','Undo',1);
1.512.2.11  raeburn   775:        if ($env{'environment.nocodemirror'}) {
                    776:            $result.=&Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
                    777:        }
1.487     www       778:    } else {
                    779:        $result.=&problem_edit_action_button('subeditxml','editxml','x','EditXML',1);
                    780:        $result.=&problem_edit_action_button('subundo','undo','u','Undo',1);
                    781:    }
                    782:    $result.="\n</div>";
                    783:    return $result;
1.423     www       784: }
                    785: 
                    786: sub problem_edit_header {
1.512.2.11  raeburn   787:     my ($mode)=@_;
                    788:     my $return = '<input type="hidden" name="submitted" value="edit" />'.
1.487     www       789: 	&remember_problem_state('edit').'
1.512.2.11  raeburn   790:         <div class="LC_edit_problem_header">
                    791:         <div class="LC_edit_problem_header_title">
                    792:         '.&mt('Problem Editing').$mode.&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    793:          </div><div class="LC_edit_actionbar" id="actionbar">'.
                    794:          '<input type="hidden" name="problemmode" value="saveedit" />'.
                    795:          &problem_edit_buttons();
                    796: 
                    797:     $return .= '</div></div>' . &Apache::lonxml::message_location();
                    798:     $return .= '<link rel="stylesheet" href="/adm/codemirror/codemirror-combined.css" />
                    799:     <script type="text/javascript" src="/adm/codemirror/codemirror-compressed-colorful.js"></script>';
                    800: 
                    801:     $return .= '<script type="text/javascript" src="/adm/jQuery/addons/jquery-scrolltofixed.js"></script>
                    802:         <script type="text/javascript">
                    803:             // unless internet explorer
                    804:             if (!(window.navigator.appName == "Microsoft Internet Explorer" && (document.documentMode || document.compatMode))){
                    805:                 $(document).ready(
                    806:                     function() {
                    807:                         $(\'.LC_edit_actionbar\').scrollToFixed(
                    808:                             {
                    809:                                 fixed: function(){
                    810:                                     //$(this).find(\'.LC_edit_actionbar\').css(\'height\', \'31px\');
                    811:                                     $(this).find(\'.LC_edit_actionbar\');
                    812:                                 }
                    813:                             }
                    814:                         );
                    815:                     }
                    816:                 );
                    817:             }
                    818:         </script>
                    819:         <table id="LC_edit_problem_colorful" border="0" width="100%"><tr><td bgcolor="#F8F8F8">';
                    820:     return $return;
1.105     albertel  821: }
                    822: 
1.512.2.11  raeburn   823: 
1.105     albertel  824: sub problem_edit_footer {
1.512.2.11  raeburn   825:     my $resource = $env{'request.ambiguous'};
1.412     albertel  826:     return '</td></tr></table><br />
                    827: <div class="LC_edit_problem_footer">
1.453     bisitz    828:   <hr />'.
1.423     www       829: &problem_edit_buttons().'
1.459     bisitz    830:   <hr style="clear:both;" />
1.512.2.11  raeburn   831:   <script type="text/javascript">
                    832:       restoreState("'.$resource.'");
                    833:       restoreScrollPosition("'.$resource.'");
                    834:   </script>
1.412     albertel  835: </div>
                    836: '.
1.342     albertel  837:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  838: }
                    839: 
1.235     albertel  840: sub option {
                    841:     my ($value,$name) = @_;
                    842:     my $result ="<option value='".$value."' ";
1.284     albertel  843:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  844: 	$result.=" selected='on' ";
                    845:     }
                    846:     $result.='>';
                    847:     return $result;
                    848: }
                    849: 
1.105     albertel  850: sub problem_web_to_edit_header {
1.159     albertel  851:     my ($rndseed)=@_;
1.406     albertel  852:     my $result .= '<div class="LC_edit_problem_header">';
                    853: 
                    854:     if (!$Apache::lonhomework::parsing_a_task) {
                    855: 	$result .= 
                    856: 	    '<div class="LC_edit_problem_header_title">'.
                    857: 	    &mt('Problem Testing').
                    858: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    859: 	    '</div>';
                    860:     } else {
                    861: 	$result .= 
                    862: 	    '<div class="LC_edit_problem_header_title">'.
                    863: 	    &mt('Task Testing').
                    864: 	    '</div>';
                    865:     }
                    866:     
1.315     albertel  867:     my $show_all_foils_text = 
                    868: 	($Apache::lonhomework::parsing_a_task) ?
1.452     bisitz    869: 	&mt('Show All Instances')
                    870: 	: &mt('Show All Foils');
1.315     albertel  871: 
1.452     bisitz    872:     my $show_all= '<span class="LC_nobreak"><label for="showallfoils">'
                    873:                  .'<input type="checkbox" name="showallfoils"';
1.440     bisitz    874:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.452     bisitz    875:     $show_all.= ' /> '.$show_all_foils_text
                    876:                .'</label></span>';
1.406     albertel  877: 
                    878: 
1.384     albertel  879: 
1.406     albertel  880:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  881:     if (!$Apache::lonhomework::parsing_a_task) {
                    882: 	$result.="
1.406     albertel  883: <div class='LC_edit_problem_header_row1'>
                    884: <span class=\"LC_nobreak\">
1.405     albertel  885: ".&mt("Problem Status:")."
1.235     albertel  886: <select name='problemstate'>
1.270     albertel  887:   <option value=''></option>
1.235     albertel  888:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    889:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    890:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    891:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    892:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    893: </select>
1.406     albertel  894: </span>
                    895: <span class=\"LC_nobreak\">
1.405     albertel  896: ".&mt("Problem Type:")."
1.235     albertel  897: <select name='problemtype'>
1.270     albertel  898:   <option value=''></option>
1.512.2.1  raeburn   899:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   900:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  901:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.465     raeburn   902:   ".&option('surveycred' ,'problemtype').&mt("Survey Question (with credit)")."</option>
                    903:   ".&option('anonsurvey' ,'problemtype').&mt("Anonymous Survey Question")."</option>
                    904:   ".&option('anonsurveycred' ,'problemtype').&mt("Anonymous Survey Question (with credit)")."</option>
1.428     raeburn   905:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.479     raeburn   906:   ".&option('randomizetry' ,'problemtype').&mt("New Randomization Each Try")."</option>
1.235     albertel  907: </select>
1.406     albertel  908: </span>
                    909: $show_all
                    910: </div>
                    911: <div class='LC_edit_problem_header_row2'>
                    912: <span class=\"LC_nobreak\">
1.405     albertel  913: ".&mt("Feedback Mode:")."
1.235     albertel  914: <select name='problemstatus'>
                    915:   <option value=''></option>
1.242     albertel  916:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.512.2.6  raeburn   917:   ".&option('no', 'problemstatus').&mt("Don't Show Incorrect/Correct Feedback")."</option>
1.405     albertel  918:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  919: </select>
1.406     albertel  920: </span>
                    921: ";
                    922: 
1.376     albertel  923:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    924: 	$result.="
1.406     albertel  925: <div class='LC_edit_problem_header_row1'>
                    926: <span class=\"LC_nobreak\">
1.405     albertel  927: ".&mt("Problem Status:")."
1.376     albertel  928: <select name='problemstate'>
                    929:   <option value=''></option>
                    930:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    931:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    932:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    933:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    934: </select>
1.406     albertel  935: </span>
                    936: $show_all
                    937: ";
                    938:     }
                    939:     $result.='
                    940:        <span class="LC_nobreak">
                    941:        '.&mt('Apply style file: ').'
                    942:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    943:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    944:        </span>
1.422     www       945:      </div>
                    946:      <div class="LC_edit_problem_header_row1">'.
                    947:        &Apache::lonxml::renderingoptions().'
1.406     albertel  948:      </div>
                    949:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    950:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    951:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    952:    </div>
1.453     bisitz    953:    <hr />
1.406     albertel  954:    <div class="LC_edit_problem_header_randomize_row">
                    955:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    956:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.488     www       957:      <input type="text" name="rndseed" size="24" value="'.
1.406     albertel  958: 	       $rndseed.'"
                    959:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    960: 
                    961:     if (!$Apache::lonhomework::parsing_a_task) {
                    962: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    963: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  964: 	$result .= '<span class="LC_nobreak">'.
                    965: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   966: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    967:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    968:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  969: 		$numtoanalyze.'" size="5" />').
                    970: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    971: 		'</span>';
                    972: 						    
1.313     albertel  973:     }
1.406     albertel  974: 
                    975:     $result.='
                    976:    </div>
1.453     bisitz    977:    <hr />
1.447     bisitz    978:    <div>';
1.416     raeburn   979:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    980:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    981:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    982:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    983:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  984:     $result.='
                    985:    </div>
1.453     bisitz    986:    <hr />
1.409     albertel  987:    '.&Apache::lonxml::message_location().'
1.406     albertel  988: </div>';
1.159     albertel  989:     return $result;
1.48      albertel  990: }
                    991: 
1.65      albertel  992: sub initialize_storage {
1.357     albertel  993:     my ($given_symb) = @_;
1.353     albertel  994:     undef(%Apache::lonhomework::results);
                    995:     undef(%Apache::lonhomework::history);
1.357     albertel  996:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  997: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  998:     
                    999:     # anonymous users (CODEd exams) have no data
                   1000:     if ($name eq 'anonymous' 
                   1001: 	&& !defined($domain)) {
                   1002: 	return;
                   1003:     }
                   1004: 
1.333     albertel 1005:     if ($env{'request.state'} eq 'construct' 
                   1006: 	|| $symb eq ''
                   1007: 	|| $Apache::lonhomework::type eq 'practice') {
                   1008: 	
                   1009: 	my $namespace = $symb || $env{'request.uri'};
                   1010: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel 1011: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                   1012: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel 1013: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                   1014: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                   1015: 	    &Apache::lonxml::debug("Attempt reset");
                   1016: 	}
1.159     albertel 1017: 	%Apache::lonhomework::history=
1.333     albertel 1018: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.512.2.9  raeburn  1019: 	my ($temp)=keys(%Apache::lonhomework::history);
1.159     albertel 1020: 	&Apache::lonxml::debug("Return message of $temp");
                   1021:     } else {
                   1022: 	%Apache::lonhomework::history=
                   1023: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                   1024:     }
1.353     albertel 1025: 
1.159     albertel 1026:     #ignore error conditions
1.512.2.9  raeburn  1027:     my ($temp)=keys(%Apache::lonhomework::history);
1.159     albertel 1028:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel 1029: }
                   1030: 
1.435     jms      1031: =pod
                   1032: 
                   1033: =item finalize_storage()
                   1034: 
1.512.2.9  raeburn  1035: 	Stores away the result hash to a student's environment;
                   1036: 	checks form.grade_ for specific values, otherwise stores
                   1037: 	to the running user's environment.
                   1038: 
                   1039:         &check_correctness_changes() is called in two circumstances
                   1040:         in which the results hash is to be stored permanently, for
                   1041:         grading triggered by a student's submission, where feedback on
                   1042:         correctness is to be provided to the student.
                   1043: 
                   1044:         1. Immediately prior to storing the results hash
                   1045: 
                   1046:         To handle the case where a student's submission (and award) were
                   1047:         stored after history was retrieved in &initialize_storage(), e.g.,
                   1048:         if a student submitted answers in quick succession (e.g., from
                   1049:         multiple tabs).  &Apache::inputtags::hidealldata() is called for
                   1050:         any parts with out-of-order storage (i.e., correct then incorrect,
                   1051:         where awarded >= 1 when correct).
                   1052: 
                   1053:         2. Immediately after storing the results hash
                   1054: 
                   1055:         To handle the case where lond on the student's homeserver returns
                   1056:         delay:N -- where N is the number of transactions between the last
                   1057:         retrieved in &initialize_storage() and the last stored immediately
                   1058:         before permanent storage of the current transaction via
                   1059:         lond::store_handler().  &Apache::grades::makehidden() is called
                   1060:         for any parts with out-of-order storage (i.e., correct then incorrect,
                   1061:         where awarded >= 1 when correct).
                   1062: 
                   1063: 	Will call &store_aggregates() to increment totals for attempts, 
                   1064: 	students, and corrects, if running user has student role.
1.435     jms      1065: 	
                   1066: =cut
                   1067: 
                   1068: 
1.65      albertel 1069: sub finalize_storage {
1.357     albertel 1070:     my ($given_symb) = @_;
1.159     albertel 1071:     my $result;
1.289     albertel 1072:     if (%Apache::lonhomework::results) {
1.323     albertel 1073: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                   1074: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel 1075: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel 1076: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel 1077: 	if ($env{'request.state'} eq 'construct' 
                   1078: 	    || $symb eq ''
                   1079: 	    || $Apache::lonhomework::type eq 'practice') {
                   1080: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel 1081: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel 1082: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel 1083: 					      $namespace,'',$domain,$name);
1.159     albertel 1084: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                   1085: 	} else {
1.512.2.9  raeburn  1086:             my ($laststore,$checkedparts,@parts,%postcorrect);
                   1087:             if (($env{'user.name'} eq $name) && ($env{'user.domain'} eq $domain) &&
                   1088:                 (!$Apache::lonhomework::scantronmode) && (!defined($env{'form.grade_symb'})) &&
                   1089:                 (!defined($env{'form.grade_courseid'}))) {
                   1090:                 if ($Apache::lonhomework::history{'version'}) {
                   1091:                     $laststore = $Apache::lonhomework::history{'version'}.'='.
                   1092:                                  $Apache::lonhomework::history{'timestamp'};
                   1093:                 } else {
                   1094:                     $laststore = '0=0';
                   1095:                 }
                   1096:                 my %record = &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                   1097:                 if ($record{'version'}) {
                   1098:                     my ($newversion,$oldversion,$oldtimestamp);
                   1099:                     if ($Apache::lonhomework::history{'version'}) {
                   1100:                         $oldversion = $Apache::lonhomework::history{'version'};
                   1101:                         $oldtimestamp = $Apache::lonhomework::history{'timestamp'};
                   1102:                     } else {
                   1103:                         $oldversion = 0;
                   1104:                         $oldtimestamp = 0;
                   1105:                     }
                   1106:                     if ($record{'version'} > $oldversion) {
                   1107:                         if ($record{'timestamp'} >= $oldtimestamp) {
                   1108:                             $laststore = $record{'version'}.'='.$record{'timestamp'};
                   1109:                             $newversion = $record{'version'} + 1;
                   1110:                             $checkedparts = 1;
                   1111:                             foreach my $key (keys(%Apache::lonhomework::results)) {
                   1112:                                 if ($key =~ /^resource\.([^\.]+)\.solved$/) {
                   1113:                                     my $part = $1;
                   1114:                                     if ($Apache::lonhomework::results{$key} eq 'incorrect_attempted') {
                   1115:                                         push(@parts,$part);
                   1116:                                     }
                   1117:                                 }
                   1118:                             }
                   1119:                             if (@parts) {
                   1120:                                 my @parts_to_hide = &check_correctness_changes($symb,$courseid,$domain,$name,
                   1121:                                                                                \%record,\@parts,$newversion,
                   1122:                                                                                $oldversion);
                   1123:                                 if (@parts_to_hide) {
                   1124:                                     foreach my $part (@parts_to_hide) {
                   1125:                                         $postcorrect{$part} = 1;
                   1126:                                         &Apache::inputtags::hidealldata($part);
                   1127:                                     }
                   1128:                                 }
                   1129:                             }
                   1130:                         }
                   1131:                     }
                   1132:                 }
                   1133:             }
1.159     albertel 1134: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
1.512.2.9  raeburn  1135: 					    $symb,$courseid,$domain,$name,$laststore);
                   1136:             if ($result =~ /^delay\:(\d+)$/) {
                   1137:                 my $numtrans = $1;
                   1138:                 my ($oldversion) = split(/=/,$laststore);
                   1139:                 if ($numtrans) {
                   1140:                     my $newversion = $oldversion + 1 + $numtrans;
                   1141:                     my @possparts;
                   1142:                     if ($checkedparts) {
                   1143:                         foreach my $part (@parts) {
                   1144:                             unless ($postcorrect{$part}) {
                   1145:                                 push(@possparts,$part);
                   1146:                             }
                   1147:                         }
                   1148:                     } else {
                   1149:                         foreach my $key (keys(%Apache::lonhomework::results)) {
                   1150:                             if ($key =~ /^resource\.([^\.]+)\.solved$/) {
                   1151:                                 my $part = $1;
                   1152:                                 unless ($postcorrect{$part}) {
                   1153:                                     if ($Apache::lonhomework::results{$key} eq 'incorrect_attempted') {
                   1154:                                         push(@possparts,$part);
                   1155:                                     }
                   1156:                                 }
                   1157:                             }
                   1158:                         }
                   1159:                     }
                   1160:                     if (@possparts) {
                   1161:                         my %newrecord = &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                   1162:                         my @parts_to_hide = &check_correctness_changes($symb,$courseid,$domain,$name,
                   1163:                                                                        \%newrecord,\@possparts,$newversion,
                   1164:                                                                        $oldversion);
                   1165:                         if (@parts_to_hide) {
                   1166:                             my $partslist = join(',',@parts_to_hide);
                   1167:                             &Apache::grades::makehidden($newversion,$partslist,\%newrecord,$symb,$domain,$name,1);
                   1168:                         }
                   1169:                     }
                   1170:                 }
                   1171:             }
1.159     albertel 1172: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.470     raeburn  1173:             &store_aggregates($symb,$courseid);
1.159     albertel 1174: 	}
1.323     albertel 1175:     } else {
                   1176: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel 1177:     }
1.159     albertel 1178:     return $result;
1.65      albertel 1179: }
                   1180: 
1.435     jms      1181: =pod
                   1182: 
1.512.2.9  raeburn  1183: =item check_correctness_changes()
                   1184: 
                   1185:         For all parts for which current results contain a solved status
                   1186:         of "incorrect_attempted", check if there was a transaction in which
                   1187:         solved was set to "correct_by_student" in the time since the last
                   1188:         transaction (retrieved when &initialize_storage() was called i.e.,
                   1189:         when &start_problem() was called), unless:
                   1190:         (a) questiontype parameter is set to survey or anonymous survey (+/- credit)
                   1191:         (b) problemstatus is set to no or no_feedback_ever
                   1192:         If such a transaction exists, and did not occur after "reset status"
                   1193:         by a user with grading privileges, then the current transaction is an
                   1194:         example of an out-of-order transaction (i.e., incorrect occurring after
                   1195:         correct).  Accordingly, the current transaction should be hidden.
                   1196: 
                   1197: =cut
                   1198: 
                   1199: 
                   1200: sub check_correctness_changes {
                   1201:     my ($symb,$courseid,$domain,$name,$record,$parts,$newversion,$oldversion) = @_;
                   1202:     my @parts_to_hide;
                   1203:     unless ((ref($record) eq 'HASH') && (ref($parts) eq 'ARRAY')) {
                   1204:         return @parts_to_hide;
                   1205:     }
                   1206:     if (@{$parts}) {
                   1207:         my $usec;
                   1208:         if (($env{'user.name'} eq $name) && ($env{'user.domain'} eq $domain) &&
                   1209:             ($env{'request.course.id'} eq $courseid)) {
                   1210:             $usec = $env{'request.course.sec'};
                   1211:         } else {
                   1212:             $usec = &Apache::lonnet::getsection($domain,$name,$courseid);
                   1213:         }
                   1214:         foreach my $id (@{$parts}) {
                   1215:             next if (($Apache::lonhomework::results{'resource.'.$id.'.type'} =~ /survey/) ||
                   1216:                      (&Apache::lonnet::EXT("resource.$id.problemstatus",$symb,
                   1217:                                            $domain,$name,$usec,undef,$courseid) =~ /^no/));
                   1218:             my $reset;
                   1219:             for (my $i=$newversion-1; $i>=$oldversion; $i--) {
                   1220:                 if (($record->{$i.':resource.'.$id.'.regrader'}) &&
                   1221:                     ($record->{$i.':resource.'.$id.'.tries'} eq '') &&
                   1222:                     ($record->{$i.':resource.'.$id.'.award'} eq '')) {
                   1223:                     $reset = 1;
                   1224:                 } elsif (($record->{$i.":resource.$id.solved"} eq 'correct_by_student') &&
                   1225:                          ($record->{$i.":resource.$id.awarded"} >= 1)) {
                   1226:                     unless ($reset) {
                   1227:                         push(@parts_to_hide,$id);
                   1228:                         last;
                   1229:                     }
                   1230:                 }
                   1231:             }
                   1232:         }
                   1233:     }
                   1234:     return @parts_to_hide;
                   1235: }
                   1236: 
                   1237: =pod
                   1238: 
1.435     jms      1239: item store_aggregates()
                   1240: 
                   1241: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                   1242: 	for the course. Increments total number of attempts, unique students 
                   1243: 	and corrects for each part for an instance of a problem, as appropriate.
                   1244: 	
                   1245: =cut
                   1246: 
1.285     raeburn  1247: sub store_aggregates {
                   1248:     my ($symb,$courseid) = @_;
1.479     raeburn  1249:     my (%aggregate,%anoncounter,%randtrycounter);
1.286     albertel 1250:     my @parts;
1.288     albertel 1251:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                   1252:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel 1253:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel 1254:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel 1255:             push(@parts, $1);
1.285     raeburn  1256:         }
                   1257:     }
1.286     albertel 1258:     foreach my $part (@parts) {
1.470     raeburn  1259:         if ($env{'request.role'} =~/^st/) {
                   1260:             if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                   1261: 	        eq 'APPROX_ANS' ||
                   1262: 	        $Apache::lonhomework::results{'resource.'.$part.'.award'}
                   1263: 	        eq 'EXACT_ANS') {
                   1264:                 $aggregate{$symb."\0".$part."\0correct"} = 1;
                   1265:             }
                   1266:             if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
                   1267:                 $aggregate{$symb."\0".$part."\0users"} = 1;
                   1268:             } else {
                   1269:                 my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
                   1270:                 if ($last_reset) {
                   1271:                     if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
                   1272:                         $aggregate{$symb."\0".$part."\0users"} = 1;
                   1273:                     }
                   1274:                 }
                   1275:             }
                   1276:             $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn  1277:         }
1.470     raeburn  1278:         if (($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'anonsurvey') || 
1.479     raeburn  1279:             ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'anonsurveycred') ||
                   1280:             ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'randomizetry')) {
                   1281:             if ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'randomizetry') {
                   1282:                 $randtrycounter{$symb."\0".$part} = 1;
                   1283:             } else {
                   1284:                 $anoncounter{$symb."\0".$part} = 1;
                   1285:             }
1.470     raeburn  1286:             my $needsrelease = $Apache::lonnet::needsrelease{'parameter:type:'.$Apache::lonhomework::results{'resource.'.$part.'.type'}};
                   1287:             if ($needsrelease) {   
                   1288:                 my $curr_required = $env{'course.'.$env{'request.course.id'}.'.internal.releaserequired'};
                   1289:                 if ($curr_required eq '') {
1.471     raeburn  1290:                     &Apache::lonnet::update_released_required($needsrelease);
1.470     raeburn  1291:                 } else {
                   1292:                     my ($currmajor,$currminor) = split(/\./,$curr_required);
                   1293:                     my ($needsmajor,$needsminor) = split(/\./,$needsrelease);
                   1294:                     if (($currmajor < $needsmajor) || ($currmajor == $needsmajor && $currminor < $needsminor)) {
1.471     raeburn  1295:                         &Apache::lonnet::update_released_required($needsrelease);
1.470     raeburn  1296:                     }
1.292     raeburn  1297:                 }
                   1298:             }
1.285     raeburn  1299:         }
                   1300:     }
1.512.2.9  raeburn  1301:     if (keys(%aggregate) > 0) {
1.289     albertel 1302: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn  1303:                             $cdomain,$cname);
                   1304:     }
1.472     raeburn  1305:     if (keys(%anoncounter) > 0) {
1.481     raeburn  1306:         &Apache::lonnet::cput('nohist_anonsurveys',\%anoncounter,
                   1307:                               $cdomain,$cname);
1.472     raeburn  1308:     }
1.479     raeburn  1309:     if (keys(%randtrycounter) > 0) {
1.481     raeburn  1310:         &Apache::lonnet::cput('nohist_randomizetry',\%randtrycounter,
                   1311:                               $cdomain,$cname);
1.479     raeburn  1312:     }
1.292     raeburn  1313: }
1.289     albertel 1314: 
1.65      albertel 1315: sub checkout_msg {
1.211     albertel 1316:     my %lt=&Apache::lonlocal::texthash( 
                   1317: 		'resource'=>'The resource needs to be checked out',
                   1318: 		'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.',
                   1319:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
1.512.2.1  raeburn  1320:                 'checkout'=>'Check out Exam for Viewing',
                   1321: 		'checkout?'=>'Check out Exam?');
1.352     albertel 1322:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel 1323:     return (<<ENDCHECKOUT);
1.211     albertel 1324: <h2>$lt{'resource'}</h2>
                   1325:     <p>$lt{'id_expln'}</p>
1.449     bisitz   1326: <p class="LC_warning">$lt{'warning'}</p>
1.444     bisitz   1327: <form name="checkout" method="post" action="$uri">
1.91      albertel 1328: <input type="hidden" name="doescheckout" value="yes" />
1.512.2.4  raeburn  1329: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onclick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel 1330: </form>
                   1331: ENDCHECKOUT
                   1332: }
                   1333: 
1.252     albertel 1334: sub firstaccess_msg {
1.253     albertel 1335:     my ($time,$symb)=@_;
1.414     albertel 1336:     my $result;
                   1337:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                   1338:     if ($interval[1] eq 'map') {
                   1339: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                   1340: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                   1341:     
                   1342: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.504     golterma 1343: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.',$foldertitle)."</h2>"
                   1344:                              .'<p>'.&mt('Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                   1345:                              ,$foldertitle,$time)."</p>";
1.414     albertel 1346:     } elsif ($interval[1] eq 'course') {
                   1347: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.504     golterma 1348:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.',$course)."</h2>"
1.505     golterma 1349:                              .'<p>'.&mt('Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
1.504     golterma 1350:                              ,$course,$time)."</p>";
1.414     albertel 1351:     } else {
                   1352: 	my $title=&Apache::lonnet::gettitle($symb);
1.504     golterma 1353:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.',$title)."</h2>"
                   1354:                              .'<p>'.&mt('Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                   1355:                              ,$title,$time)."</p>";
1.414     albertel 1356:     }
1.352     albertel 1357:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz   1358:     my $buttontext = &mt('Show Resource');
                   1359:     my $timertext = &mt('Start Timer?');
1.414     albertel 1360:     $result .= (<<ENDCHECKOUT);
1.444     bisitz   1361: <form name="markaccess" method="post" action="$uri">
1.252     albertel 1362: <input type="hidden" name="markaccess" value="yes" />
1.512.2.4  raeburn  1363: <input type="button" name="accessbutton" value="$buttontext" onclick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel 1364: </form>
                   1365: ENDCHECKOUT
1.414     albertel 1366:     return $result;
1.252     albertel 1367: }
                   1368: 
1.204     albertel 1369: sub init_problem_globals {
                   1370:     my ($type)=@_;
                   1371:     #initialize globals
1.308     foxr     1372:     #   For problems, we start out in part 0 (outside a <part> tag).
                   1373:     #   and part 0 is used to describe the main body of the <problem>
                   1374:     #
1.204     albertel 1375:     if ($type eq 'problem') {
                   1376: 	$Apache::inputtags::part='0';
                   1377: 	@Apache::inputtags::partlist=('0');
1.405     albertel 1378: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel 1379: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr     1380: 
1.266     albertel 1381:     } elsif ($type eq 'library') {
1.204     albertel 1382: 	$Apache::inputtags::part='';
                   1383: 	@Apache::inputtags::partlist=();
1.405     albertel 1384: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel 1385: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr     1386: 
1.304     albertel 1387:     } elsif ($type eq 'Task') {
                   1388: 	$Apache::inputtags::part='0';
                   1389: 	@Apache::inputtags::partlist=('0');
1.405     albertel 1390: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel 1391: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel 1392:     }
1.477     www      1393:     @Apache::functionplotresponse::callscripts=();
1.204     albertel 1394:     @Apache::inputtags::responselist = ();
                   1395:     @Apache::inputtags::importlist = ();
                   1396:     @Apache::inputtags::previous=();
                   1397:     @Apache::inputtags::previous_version=();
1.512.2.10  raeburn  1398:     $Apache::inputtags::leniency='';
1.204     albertel 1399:     $Apache::structuretags::printanswer='No';
                   1400:     @Apache::structuretags::whileconds=();
                   1401:     @Apache::structuretags::whilebody=();
                   1402:     @Apache::structuretags::whileline=();
                   1403:     $Apache::lonhomework::scantronmode=0;
                   1404:     undef($Apache::lonhomework::name);
1.358     albertel 1405:     undef($Apache::lonhomework::default_type);
                   1406:     undef($Apache::lonhomework::type);
1.204     albertel 1407: }
                   1408: 
                   1409: sub reset_problem_globals {
                   1410:     my ($type)=@_;
                   1411:     undef(%Apache::lonhomework::history);
                   1412:     undef(%Apache::lonhomework::results);
                   1413:     undef($Apache::inputtags::part);
1.512.2.10  raeburn  1414:     undef($Apache::inputtags::leniency);
1.498     raeburn  1415:     if ($type eq 'Task') {
                   1416:         undef($Apache::inputtags::slot_name);
1.512.2.9  raeburn  1417:     } elsif ($type eq 'problem') {
                   1418:         undef($Apache::lonhomework::rawrndseed);
1.498     raeburn  1419:     }
1.208     albertel 1420: #don't undef this, lonhomework.pm takes care of this, we use this to 
                   1421: #detect if we try to do 2 problems in one file
                   1422: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel 1423:     undef($Apache::lonhomework::name);
1.358     albertel 1424:     undef($Apache::lonhomework::default_type);
                   1425:     undef($Apache::lonhomework::type);
                   1426:     undef($Apache::lonhomework::scantronmode);
                   1427:     undef($Apache::lonhomework::ignore_response_errors);
1.477     www      1428:     undef(@Apache::functionplotresponse::callscripts);
1.405     albertel 1429:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel 1430: }
                   1431: 
1.241     albertel 1432: sub set_problem_state {
1.240     albertel 1433:     my ($part)=@_;
1.284     albertel 1434:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel 1435: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                   1436: 	    'correct_by_student';
                   1437:     }
                   1438: }
                   1439: 
1.241     albertel 1440: sub get_problem_status {
                   1441:     my ($part)=@_;
1.267     albertel 1442:     my $problem_status;
1.284     albertel 1443:     if ($env{'request.state'} eq 'construct' &&
                   1444: 	defined($env{'form.problemstatus'})) {
                   1445: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel 1446:     } else {
                   1447: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                   1448: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel 1449: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel 1450:     }
                   1451:     return $problem_status;
                   1452: }
                   1453: 
1.9       albertel 1454: sub start_problem {
1.326     albertel 1455:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel 1456: 
1.311     foxr     1457:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel 1458:     if (!$Apache::lonxml::metamode) {
                   1459: 	&Apache::lonxml::startredirection();
                   1460:     }
1.311     foxr     1461: 
1.308     foxr     1462:     # Problems don't nest and we don't allow more than one <problem> in
                   1463:     # a .problem file.
                   1464:     #
1.184     albertel 1465:     if ( $Apache::inputtags::part ne '' ||
                   1466: 	 $Apache::lonhomework::parsing_a_problem) {
                   1467: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel 1468: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel 1469: 	return '';
                   1470:     }
1.184     albertel 1471: 
                   1472:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel 1473:     &init_problem_globals('problem');
1.166     albertel 1474: 
1.284     albertel 1475:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel 1476: 	$Apache::lonhomework::scantronmode=1;
                   1477:     }
1.161     albertel 1478: 
1.159     albertel 1479:     if ($target ne 'analyze') {
1.415     raeburn  1480:         my $type = &Apache::lonnet::EXT('resource.0.type');
                   1481: 	$Apache::lonhomework::type=$type;
1.284     albertel 1482: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel 1483: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel 1484: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel 1485: 	}
1.332     albertel 1486: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel 1487:     }
1.164     albertel 1488:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel 1489: 	my $uri=$env{'request.uri'};
1.159     albertel 1490: 	if ($uri=~/\.(\w+)$/) {
                   1491: 	    $Apache::lonhomework::type=$1;
                   1492: 	    &Apache::lonxml::debug("Using type of $1");
                   1493: 	} else {
                   1494: 	    $Apache::lonhomework::type='problem';
                   1495: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                   1496: 	}
1.87      albertel 1497:     }
1.301     albertel 1498:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www      1499: 
1.363     albertel 1500:     &initialize_storage();
1.389     albertel 1501:     if ($target ne 'analyze'
                   1502:        	&& $env{'request.state'} eq 'construct') {
                   1503: 	&set_problem_state('0');
                   1504:     }
                   1505: 
1.366     albertel 1506:     if ($target eq 'web') {
                   1507: 	&Apache::lonxml::debug(" grading history ");
                   1508: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                   1509:     }
1.363     albertel 1510: 
1.159     albertel 1511:     #added vars to the scripting enviroment
1.213     albertel 1512:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel 1513:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel 1514:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1515:     my $status;
                   1516:     my $accessmsg;
1.508     raeburn  1517:     my $resource_due;
1.159     albertel 1518: 
1.343     albertel 1519:     my $name= &get_resource_name($parstack,$safeeval);
1.512.2.9  raeburn  1520:     my ($result,$form_tag_start,$slot_name,$slot,$probpartlist);
1.506     raeburn  1521: 
                   1522:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1523:         $target eq 'tex') {
                   1524:         if ($env{'form.markaccess'}) {
                   1525:             my @interval=&Apache::lonnet::EXT("resource.0.interval");
1.512.2.8  raeburn  1526:             &Apache::lonnet::set_first_access($interval[1],$interval[0]);
1.506     raeburn  1527:         }
                   1528: 
                   1529:         ($status,$accessmsg,$slot_name,$slot) =
                   1530:             &Apache::lonhomework::check_slot_access('0','problem');
                   1531:         push (@Apache::inputtags::status,$status);
                   1532:     }
                   1533: 
1.354     albertel 1534:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                   1535: 	|| $target eq 'edit') {
1.512.2.9  raeburn  1536: 	($result,$form_tag_start,$probpartlist) =
1.350     albertel 1537: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1538: 			$name);
1.512.2.9  raeburn  1539:     } elsif (($target eq 'grade') && ($Apache::lonhomework::type eq 'randomizetry')) {
                   1540:         my ($symb)= &Apache::lonnet::whichuser();
                   1541:         my $navmap = Apache::lonnavmaps::navmap->new();
                   1542:         if (ref($navmap)) {
                   1543:             my $res = $navmap->getBySymb($symb);
                   1544:             if (ref($res)) {
                   1545:                 $probpartlist = $res->parts();
                   1546:             }
                   1547:         }
1.350     albertel 1548:     }
                   1549: 
1.284     albertel 1550:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel 1551: 
1.479     raeburn  1552:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval,$target); }
1.159     albertel 1553:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1554: 	$target eq 'tex') {
1.479     raeburn  1555: 
1.159     albertel 1556: 	#handle rand seed in construction space
1.512.2.9  raeburn  1557: 	my $rndseed=&setup_rndseed($safeeval,$target,$probpartlist);
                   1558:         if (($target eq 'grade') && &Apache::response::submitted()) {
                   1559:             if ($Apache::lonhomework::type eq 'randomizetry') {
                   1560:                 $Apache::lonhomework::results{'resource.0.rndseed'}=$rndseed;
                   1561:             } else {
                   1562:                 my @parts;
                   1563:                 if (ref($probpartlist) eq 'ARRAY') {
                   1564:                     @parts = @{$probpartlist};
                   1565:                 }
                   1566:                 unless (@parts) {
                   1567:                     $Apache::lonhomework::results{'resource.0.rndseed'}=$Apache::lonhomework::rawrndseed;
                   1568:                 }
                   1569:             }
                   1570:         }
1.367     albertel 1571: 	my ($symb)=&Apache::lonnet::whichuser();
1.479     raeburn  1572: 
1.333     albertel 1573: 	if ($env{'request.state'} ne "construct" && 
                   1574: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel 1575: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
1.462     raeburn  1576: 		$rndseed.'" />'.
                   1577: 		    '<input type="submit" name="resetdata"
                   1578:                              value="'.&mt('New Problem Variation').'" />';
1.334     albertel 1579: 	    if (exists($env{'form.username'})) {
                   1580: 		$form_tag_start.=
1.164     albertel 1581: 		    '<input type="hidden" name="username"
1.284     albertel 1582:                              value="'.$env{'form.username'}.'" />';
1.334     albertel 1583: 	    }
1.462     raeburn  1584: 	    if ($env{'request.role.adv'}) {
                   1585: 		$form_tag_start.= ' <label class="LC_nobreak">'
                   1586:                          .'<input type="checkbox" name="showallfoils"';
                   1587: 		if (defined($env{'form.showallfoils'})) {
                   1588: 		    $form_tag_start.=' checked="checked"';
                   1589: 		}
                   1590:                 $form_tag_start.= ' /> '
                   1591:                                  .&mt('Show All Foils')
                   1592:                                  .'</label>';
                   1593: 	    }
1.417     www      1594:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn  1595:                 $form_tag_start.=&practice_problem_header();
1.417     www      1596:             }
1.462     raeburn  1597: 	    $form_tag_start.='<hr />';
1.479     raeburn  1598:         } elsif (($env{'request.state'} ne "construct") &&
                   1599:                  ($Apache::lonhomework::type eq 'randomizetry') &&
                   1600:                  ($status eq 'CAN_ANSWER')) {
                   1601:             my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
                   1602:             my $problemstatus = &get_problem_status($Apache::inputtags::part);
                   1603:             $form_tag_start.=&randomizetry_problem_header($problemstatus,$reqtries);
                   1604:         }
1.324     albertel 1605: 
1.159     albertel 1606: 	my $expression='$external::datestatus="'.$status.'";';
                   1607: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                   1608: 	&Apache::run::run($expression,$safeeval);
                   1609: 	&Apache::lonxml::debug("Got $status");
1.324     albertel 1610: 
1.159     albertel 1611: 	if (( $status eq 'CLOSED' ) ||
                   1612: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1613: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel 1614: 	    ( $status eq 'BANNED') ||
1.216     albertel 1615: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel 1616: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.499     raeburn  1617:             ( $status eq 'NOTRESERVABLE') ||
                   1618:             ( $status eq 'RESERVABLE') ||
                   1619:             ( $status eq 'RESERVABLE_LATER') ||
1.216     albertel 1620: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1621: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                   1622: 						       $style);
1.159     albertel 1623: 	    if ( $target eq "web" ) {
1.343     albertel 1624: 		my $msg;
1.159     albertel 1625: 		if ($status eq 'UNAVAILABLE') {
1.504     golterma 1626: 		    $msg.='<p class="LC_error">'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</p>';
1.441     raeburn  1627:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
1.504     golterma 1628:                     $msg.='<p class="LC_warning">'.&mt('You are not currently signed up to work at this time and/or place.').'</p>';
1.499     raeburn  1629:                 } elsif (($status eq 'RESERVABLE') || ($status eq 'RESERVABLE_LATER') ||
                   1630:                          ($status eq 'NOTRESERVABLE')) {
1.504     golterma 1631:                     $msg.='<p class="LC_warning">'.&mt('Access requires reservation to work at specific time/place.').'</p>';
1.253     albertel 1632: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.504     golterma 1633: 		    $msg.='<p class="LC_warning">'.&mt('Not open to be viewed').'</p>';
1.499     raeburn  1634:                 }
1.216     albertel 1635: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www      1636: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel 1637: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel 1638: 		    $msg.=&checkout_msg();
1.252     albertel 1639: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel 1640: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel 1641: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn  1642: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.499     raeburn  1643:                 } elsif ($status eq 'RESERVABLE') {
                   1644:                     $msg.=&mt('Available to make a reservation.').' '.&mt('Reservation window closes [_1].',
                   1645:                               &Apache::lonnavmaps::timeToHumanString($accessmsg,'end')).
                   1646:                           '<br />'.
                   1647:                           &Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
                   1648:                 } elsif ($status eq 'RESERVABLE_LATER') {
                   1649:                     $msg.=&mt('Window to make a reservation will open [_1].',
                   1650:                               &Apache::lonnavmaps::timeToHumanString($accessmsg,'start'));
                   1651:                 } elsif ($status eq 'NOTRESERVABLE') {
                   1652:                     $msg.=&mt('Not available to make a reservation.');  
1.159     albertel 1653: 		}
                   1654: 		$result.=$msg.'<br />';
                   1655: 	    } elsif ($target eq 'tex') {
1.332     albertel 1656: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                   1657: 		                    : '\begin{minipage}{\textwidth}';
1.443     foxr     1658: 		$result.='\noindent \vskip 1 mm '.
1.332     albertel 1659: 		    $startminipage.'\vskip 0 mm';
1.159     albertel 1660: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel 1661: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel 1662: 		} else {
1.211     albertel 1663: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel 1664: 		}
                   1665: 	    }
1.324     albertel 1666: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel 1667: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                   1668: 						       $style);
1.324     albertel 1669: 	    if ($target eq 'web') {
1.375     albertel 1670: 		$result .= 
                   1671: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel 1672: 	    } elsif ($target eq 'grade') {
                   1673: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                   1674: 							'problem');
                   1675: 	    }
1.159     albertel 1676: 	} elsif ($target eq 'web') {
1.508     raeburn  1677: 	    if ($status eq 'CAN_ANSWER') {
                   1678:                 $resource_due = &Apache::lonhomework::due_date(0, $env{'request.symb'});
                   1679:                 if ($slot_name ne '') {
                   1680:                     my $checked_in =
                   1681:                         $Apache::lonhomework::history{'resource.0.checkedin'};
                   1682:                     if ($checked_in eq '') {
                   1683:                         # unproctored slot access, self checkin
                   1684:                         &Apache::bridgetask::check_in('problem',undef,undef,
                   1685:                                                       $slot_name);
                   1686:                         $checked_in =
                   1687:                             $Apache::lonhomework::results{"resource.0.checkedin"};
                   1688:                     }
                   1689:                     if ((ref($slot) eq 'HASH') && ($checked_in ne '')) {
                   1690:                         if ($slot->{'starttime'} < time()) {
                   1691:                             if (!$resource_due) {
                   1692:                                 $resource_due = $slot->{'endtime'};
                   1693:                             } elsif ($slot->{'endtime'} < $resource_due) {
                   1694:                                 $resource_due = $slot->{'endtime'};
                   1695:                             }
                   1696:                         }
                   1697:                     }
                   1698:                 }
                   1699:                 if ($resource_due) {
                   1700:                     my $time_left = $resource_due - time();
                   1701:                     if ($resource_due && ($time_left > 0) && ($target eq 'web')) {
                   1702:                         $result .= &Apache::lonhtmlcommon::set_due_date($resource_due);
                   1703:                     }
                   1704:                 }
                   1705:             }
1.368     albertel 1706: 	    $result.="\n $form_tag_start \t".	
1.227     albertel 1707: 	      '<input type="hidden" name="submitted" value="yes" />';
                   1708: 	    # create a page header and exit
1.284     albertel 1709: 	    if ($env{'request.state'} eq "construct") {
                   1710: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn  1711:                 if ($Apache::lonhomework::type eq 'practice') {
                   1712:                     $result.= '<input type="submit" name="resetdata" '.
                   1713:                               'value="'.&mt('New Problem Variation').'" />'.
                   1714:                               &practice_problem_header().'<hr />';
                   1715:                 }
1.227     albertel 1716: 	    }
                   1717: 	    # if we are viewing someone else preserve that info
1.284     albertel 1718: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel 1719: 		foreach my $field ('symb','courseid','domain','username') {
                   1720: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1721: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1722: 		}
1.479     raeburn  1723:                 foreach my $field ('trial','questiontype') {
                   1724:                     if ($env{"form.grade_$field"} ne '') {
                   1725:                         $result .= '<input type="hidden" name="grade_'.$field.
                   1726:                             '" value="'.$env{"form.grade_$field"}.'" />'."\n";
                   1727:                     }
                   1728:                 }
1.159     albertel 1729: 	    }
1.490     raeburn  1730:             if ($env{'form.grade_imsexport'}) {
                   1731:                 $result = '';
                   1732:             }
1.159     albertel 1733: 	} elsif ($target eq 'tex') {
1.319     foxr     1734: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
1.500     foxr     1735: 	    $result .= &select_metadata_hyphenation();
                   1736: 	    
1.319     foxr     1737: 
1.99      sakharuk 1738: 	}
1.159     albertel 1739:     } elsif ($target eq 'edit') {
1.343     albertel 1740: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1741: 	$Apache::lonxml::warnings_error_header=
                   1742: 	    &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 1743: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1744: 	$result.=$temp;
                   1745:     } elsif ($target eq 'modified') {
                   1746: 	$result=$token->[4];
                   1747:     } else {
                   1748: 	# page_start returned a starting result, delete it if we don't need it
                   1749: 	$result = '';
1.99      sakharuk 1750:     }
1.159     albertel 1751:     return $result;
1.9       albertel 1752: }
                   1753: 
                   1754: sub end_problem {
1.159     albertel 1755:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1756:     my $result;
1.310     foxr     1757: 
1.321     albertel 1758:     if (!$Apache::lonxml::metamode) {
                   1759: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1760: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1761:     }
1.319     foxr     1762: 
                   1763:     if ($target eq 'tex') {
1.321     albertel 1764: 	# Figure out the front matter and replace the
                   1765: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1766: 	# this in end_problem because whether or not we display due
                   1767: 	# dates depends on whether due dates have already been
                   1768: 	# displayed in the problem parts.
                   1769: 
1.319     foxr     1770: 	my $frontmatter   = '';
                   1771: 	my $startminipage = '';
                   1772: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1773: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1774: 	}
                   1775: 	my $id = $Apache::inputtags::part;
                   1776: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1777: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.512.2.9  raeburn  1778: 	my @packages = split(/,/,$packages);
1.319     foxr     1779: 	my $allow_print_points = 0;
                   1780: 	foreach my $partial_key (@packages) {
                   1781: 	    if ($partial_key=~m/^part_0$/) {
                   1782: 		$allow_print_points=1;
                   1783: 	    }
                   1784: 	}
                   1785: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1786: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1787: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1788: 			'.disableexampointprint'}) eq 'yes') {
                   1789: 	    $allow_print_points=0;
                   1790: 	}
                   1791: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.443     foxr     1792: 	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     1793: 	&clear_required_languages();
1.319     foxr     1794: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1795: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1796: 	
                   1797: 	#  Figure out what the due date is and if we need to print
                   1798: 	#  it in the problem header.  We have been logging the
                   1799: 	#  last due date written to file. 
                   1800: 	
                   1801: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                   1802: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
1.448     bisitz   1803:         my $duedate_text = &mt('Due date: [_1]'
                   1804:                               ,&Apache::lonlocal::locallocaltime($duetime));
1.319     foxr     1805: 	my $temp_file;
                   1806: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1807: 	
                   1808: 	# Figure out what the last printed due date is or set it
                   1809: 	# to the epoch if no duedates have been printed.
                   1810: 	
                   1811: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1812: 	if (-e $filename) {
                   1813: 	    $temp_file = Apache::File->new($filename);
                   1814: 	    my @due_file      = <$temp_file>;
                   1815: 	    $due_file_content = $due_file[$#due_file];
                   1816: 	    chomp $due_file_content;
                   1817: 	} 
                   1818: 	
                   1819: 	# We display the due date iff it is not the same as the last
                   1820: 	# duedate in problem header ($due_file_content), and
                   1821: 	# none of our parts displayed a duedate.
                   1822: 	#
                   1823: 	my $parts_with_displayduedate;
                   1824: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1825: 	    $parts_with_displayduedate = 
                   1826: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1827: 	} else {
                   1828: 	    $parts_with_displayduedate = 0;
                   1829: 	}
                   1830: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1831: 	    $temp_file = Apache::File->new('>'.$filename);
                   1832: 	    print $temp_file "$duetime\n";
                   1833: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1834: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1835: 		    $frontmatter .= $begin_doc.
1.448     bisitz   1836: 			'\textit{'.$duedate_text.'} '.$toc_line;
1.319     foxr     1837: 		} else {
                   1838: 		    $frontmatter.= $begin_doc.$toc_line;
1.463     foxr     1839: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { 
1.492     christia 1840: 			$frontmatter .= '\fbox{\textit{'.&mt('[quant,_1,pt,pt]',$weight ).'}}';
1.463     foxr     1841: 		    }
1.319     foxr     1842: 		}
                   1843: 	    } else {
1.448     bisitz   1844: 		$frontmatter .= '\vskip 1mm\textit{'.$duedate_text.'} \\\\\\\\'.$startminipage;
1.319     foxr     1845: 	    }
                   1846: 	} else {
                   1847: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1848: 		$frontmatter .= $begin_doc.$toc_line;
1.463     foxr     1849: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { 
1.492     christia 1850: 		    $frontmatter .= '\fbox{\textit{'.&mt('[quant,_1,pt,pt]',$weight ).'}}';
1.463     foxr     1851: 		}
1.319     foxr     1852: 	    } else {
1.381     albertel 1853: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1854: 	    }
                   1855: 	}
                   1856: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1857:     }
                   1858: 
1.159     albertel 1859:     my $status=$Apache::inputtags::status['-1'];
                   1860:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1861: 	$target eq 'tex') {
1.249     albertel 1862: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1863: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1864: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1865: 		&Apache::inputtags::grade;
1.324     albertel 1866: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1867: 		# no need to grade, and don't want to hide data
1.249     albertel 1868: 	    } else {
                   1869: 		# move any submission data to .hidden
                   1870: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1871: 	    }
1.159     albertel 1872: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1873: 		  $Apache::inputtags::part eq '0' &&
1.490     raeburn  1874: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED'
                   1875:                   && !$env{'form.grade_imsexport'}) {
1.159     albertel 1876: 	    # if part is zero, no <part>s existed, so we need show the current
                   1877: 	    # grading status
                   1878: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1879: 	    $result.= $gradestatus;
                   1880: 	}
                   1881: 	if (
1.284     albertel 1882: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1883: 	    ($target eq 'answer') || ($target eq 'tex')
                   1884: 	   ) {
1.490     raeburn  1885: 	    if (($target ne 'tex') &&
                   1886: 		($env{'form.answer_output_mode'} ne 'tex') && 
                   1887:                 (!$env{'form.grade_imsexport'})) {
1.254     www      1888: 		$result.="</form>";
1.159     albertel 1889: 	    }
                   1890: 	    if ($target eq 'web') {
1.507     raeburn  1891:                 #
                   1892:                 # Closing </body></html> not added by end_page().
                   1893:                 # Added separately at end of this routine, after added
                   1894:                 # <script></script> so document will be valid xhtml.
                   1895:                 #
                   1896: 		$result.= &Apache::loncommon::end_page({'discussion' => 1,
                   1897: 							'notbody'    => 1});
1.159     albertel 1898: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1899: 		my $endminipage = '';
1.284     albertel 1900: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1901: 		    $endminipage = '\end{minipage}';
                   1902: 		}
1.284     albertel 1903:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1904: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1905: 		} else {
1.262     sakharuk 1906: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1907: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1908: 			$result .= $endminipage.'\end{document} ';
                   1909: 		    } else {
1.382     albertel 1910: 			$result .= $endminipage;
1.262     sakharuk 1911: 		    }
1.159     albertel 1912: 		}
                   1913: 	    }
                   1914: 	}
1.476     www      1915:         if ($target eq 'web') {
                   1916:            $result.=&Apache::functionplotresponse::init_script();
                   1917:         }
1.159     albertel 1918: 	if ($target eq 'grade') {
                   1919: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1920: 	    &finalize_storage();
                   1921: 	}
1.284     albertel 1922: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1923: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1924: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1925: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1926: 	                        # we always show answer mode too.
1.159     albertel 1927: 	}
                   1928:     } elsif ($target eq 'meta') {
                   1929: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1930: 	    @Apache::inputtags::response=();
1.159     albertel 1931: 	    $result=&Apache::response::mandatory_part_meta;
                   1932: 	}
1.215     albertel 1933: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1934: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1935:     } elsif ($target eq 'edit') {
                   1936: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1937: 	$result .= &problem_edit_footer();
1.320     albertel 1938:     } elsif ($target eq 'modified') {
                   1939: 	 $result .= $token->[2];
1.159     albertel 1940:     }
1.155     albertel 1941: 
1.284     albertel 1942:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1943: 	&Apache::inputtags::check_for_duplicate_ids();
                   1944:     }
1.204     albertel 1945: 
                   1946:     &reset_problem_globals('problem');
1.159     albertel 1947: 
1.502     foxr     1948:     #
                   1949:     # This shouild be just above the return so that the
                   1950:     # time put in the javascript is as late as possible in the
                   1951:     # computation:
                   1952:     #
                   1953:     if ($target eq 'web') {
                   1954:         $result .= &Apache::lonhtmlcommon::set_compute_end_time();
1.507     raeburn  1955:         #
                   1956:         # Closing tags delayed so any <script></script> tags 
                   1957:         # not in head can appear inside body, for valid xhtml.
                   1958:         # 
                   1959:         $result .= "</body>\n</html>";
1.502     foxr     1960:     }
1.159     albertel 1961:     return $result;
1.48      albertel 1962: }
                   1963: 
1.108     albertel 1964: 
1.48      albertel 1965: sub start_library {
1.159     albertel 1966:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1967:     my ($result,$form_tag_start);
1.371     albertel 1968:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1969: 	&init_problem_globals('library');
                   1970: 	$Apache::lonhomework::type='problem';
                   1971:     }
1.159     albertel 1972:     if ($target eq 'edit') {
1.343     albertel 1973: 	($result,$form_tag_start)=
                   1974: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1975: 			'Edit');
                   1976: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1977: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1978: 	$result.=$temp;
                   1979:     } elsif ($target eq 'modified') {
                   1980: 	$result=$token->[4];
1.340     albertel 1981:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1982: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1983: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1984: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1985: 	($result,$form_tag_start)=
                   1986: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1987: 			$name);
1.479     raeburn  1988: 	my $rndseed=&setup_rndseed($safeeval,$target);
1.343     albertel 1989: 	$result.=" \n $form_tag_start".	
1.159     albertel 1990: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1991: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1992:         if ($Apache::lonhomework::type eq 'practice') {
                   1993:             $result.= '<input type="submit" name="resetdata" '.
                   1994:                       'value="'.&mt('New Problem Variation').'" />'.
                   1995:                       &practice_problem_header().'<hr />';
                   1996:         }
1.159     albertel 1997:     }
                   1998:     return $result;
1.48      albertel 1999: }
                   2000: 
                   2001: sub end_library {
1.159     albertel 2002:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2003:     my $result='';
                   2004:     if ($target eq 'edit') {
                   2005: 	$result=&problem_edit_footer();
1.371     albertel 2006:     } elsif ($target eq 'web' 
                   2007: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   2008: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 2009: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 2010:     }
1.371     albertel 2011:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   2012: 	&reset_problem_globals('library');
                   2013:     }
1.159     albertel 2014:     return $result;
1.197     www      2015: }
                   2016: 
                   2017: sub start_definetag {
1.326     albertel 2018:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      2019: 
                   2020:     my $result;
                   2021: 
                   2022:     my $name = $token->[2]->{'name'};
1.326     albertel 2023:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 2024:     if ($target eq 'web') {
                   2025: 	if ($name=~/^\//) {
                   2026: 	    $result=
                   2027: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   2028: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   2029: 	} else {
                   2030: 	    $result=
                   2031: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   2032: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   2033: 	}
                   2034: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   2035: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      2036:     }
                   2037:     return $result;
                   2038: }
                   2039: 
                   2040: sub end_definetag {
                   2041:     return '';
1.1       albertel 2042: }
                   2043: 
                   2044: sub start_block {
1.201     albertel 2045:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 2046: 
                   2047:     my $result;
1.1       albertel 2048: 
1.339     albertel 2049:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   2050: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 2051: 	my $code = $token->[2]->{'condition'};
1.385     albertel 2052: 	if (defined($code) && $code ne '') {
1.137     albertel 2053: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   2054: 		&Apache::lonxml::default_homework_load($safeeval);
                   2055: 	    }
1.131     albertel 2056: 	    $result = &Apache::run::run($code,$safeeval);
                   2057: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   2058: 	} else {
                   2059: 	    $result='1';
                   2060: 	}
                   2061: 	if ( ! $result ) {
1.201     albertel 2062: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 2063: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   2064: 	}
                   2065: 	$result='';
                   2066:     } elsif ($target eq 'edit') {
                   2067: 	$result .=&Apache::edit::tag_start($target,$token);
                   2068: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   2069: 					  $token,40);
                   2070: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2071:     } elsif ($target eq 'modified') {
                   2072: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2073: 						     $safeeval,'condition');
                   2074: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 2075:     }
1.131     albertel 2076:     return $result;
1.1       albertel 2077: }
                   2078: 
                   2079: sub end_block {
1.167     www      2080:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2081:     my $result;
                   2082:     if ($target eq "edit") {
                   2083: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   2084:     }
                   2085:     return $result;
                   2086: }
1.500     foxr     2087: #
                   2088: #  <languageblock [include='lang1,lang2...'] [exclude='lang1,lang2...']>
                   2089: #  ...
                   2090: #  </languageblock>
                   2091: #
                   2092: #   This declares the intent to provide content that can be rendered in the
                   2093: #   set of languages in the include specificatino but not in the exclude
                   2094: #   specification.  If a currently preferred language is in the include list
                   2095: #   the content in the <languageblock>...</languageblock> is rendered
                   2096: #   If the currently preferred language is in the exclude list,
                   2097: #   the content in the <languageblock>..></languageblock is not rendered.
                   2098: #
                   2099: #   Pathalogical case handling:
                   2100: #     - Include specified, without the preferred language but exclude  specified
                   2101: #       also without the preferred langauge results in rendering the block.
                   2102: #     - Exclude specified without include and excluden not containing a 
                   2103: #       preferred language renders the block.
                   2104: #     - Include and exclude both specifying the preferred language does not
                   2105: #       render the block.
                   2106: #     - If neither include/exclude is specified, the block gets rendered.
                   2107: #
                   2108: #  This tag has no effect when target is in {edit, modified}
                   2109: #
1.167     www      2110: sub start_languageblock {
1.201     albertel 2111:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      2112: 
1.500     foxr     2113:     my $result = '';
1.167     www      2114: 
1.339     albertel 2115:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   2116: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 2117: 	my $include = $token->[2]->{'include'};
                   2118: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  2119:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.500     foxr     2120: 
                   2121:         # This should not even happen, since we should at least have the server language
                   2122: 
                   2123:         if (!$preferred_languages[0]) { 
                   2124: 	    $preferred_languages[0]='en'; 
                   2125: 	}
                   2126: 
                   2127:         # Now loop over all languages in order of preference
                   2128: 
                   2129: 	my $render;
1.398     www      2130:         foreach my $preferred_language (@preferred_languages) {
1.500     foxr     2131: 
                   2132: 	    # If neither include/nor exlude is present the block is going
                   2133: 	    # to get rendered.
                   2134: 
1.399     www      2135:            my $found=0;
1.500     foxr     2136:            $render=1;
                   2137: 
                   2138: 	   #  If include is specified,  don't render the block
                   2139: 	   #  unless the preferred language is included in the set.
                   2140: 
1.398     www      2141: 	   if ($include) {
1.500     foxr     2142:               $render=0;
1.398     www      2143:               foreach my $included_language (split(/\,/,$include)) {
                   2144:                  if ($included_language eq $preferred_language) {
1.500     foxr     2145:                     $render=1; 
1.399     www      2146:                     $found=1; 
1.500     foxr     2147: 		    last;	# Only need to find the first.
1.398     www      2148:                  }
                   2149:               }
                   2150: 	   }
1.500     foxr     2151:            # Do we have an exclude argument?
                   2152: 	   # If so, and one of the languages matches a preferred language
                   2153: 	   # inhibit rendering the block.  Note that in the pathalogical case the
                   2154: 	   # author has specified a preferred language in both the include and exclude
                   2155: 	   # attribte exclude is preferred.  
                   2156: 
1.398     www      2157:            if ($exclude) {
1.500     foxr     2158:               $render=1;
1.398     www      2159:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   2160:                  if ($excluded_language eq $preferred_language) {
1.500     foxr     2161:                     $render=0;
1.399     www      2162:                     $found=1;
1.500     foxr     2163: 		    last;	# Only need to find the first.
1.398     www      2164:                  }
                   2165:               }
                   2166: 	   }
1.500     foxr     2167:            if ($found) { 
                   2168: 	       last; 		# Done on any match of include or exclude.
                   2169: 	   }
1.398     www      2170:         }
1.500     foxr     2171: 	# If $render not true skip the entire block until </languageblock>
                   2172: 	#
                   2173: 
                   2174: 	if ( ! $render ) {
1.201     albertel 2175: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   2176: 						   $style);
                   2177: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   2178: 	}
1.500     foxr     2179: 	# If $render is true, we've not skipped the contents of the <languageglock>
                   2180: 	# and the normal loncapa processing flow will render it as a matter of course.
                   2181: 
1.167     www      2182:     } elsif ($target eq 'edit') {
                   2183: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 2184: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      2185: 					  $token,40);
1.211     albertel 2186: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      2187: 					  $token,40);
                   2188: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2189:     } elsif ($target eq 'modified') {
                   2190: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 2191: 						     $safeeval,'include',
                   2192: 						     'exclude');
1.167     www      2193: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2194:     }
                   2195:     return $result;
                   2196: }
                   2197: 
                   2198: sub end_languageblock {
1.170     www      2199:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2200:     my $result;
1.201     albertel 2201:     if ($target eq "edit") {
1.170     www      2202: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   2203:     }
                   2204:     return $result;
                   2205: }
1.500     foxr     2206: #  languagblock specific tags:
                   2207: {
                   2208:     # For chunks of a resource that has translations, this hash contains
                   2209:     # the translations available indexed by language name.
                   2210:     #
                   2211: 
                   2212:     my %available_texts;       
1.170     www      2213: 
1.500     foxr     2214:     # <translated> starts a block of a resource that has multiple translations.
                   2215:     # See the <lang> tag as well.
                   2216:     # When </translated> is encountered if there is a translation for the 
                   2217:     # currently preferred language, that is rendered inthe web/tex/webgrade
                   2218:     # targets.  Otherwise, the default text is rendered.
                   2219:     #
                   2220:     # Note that <lang> is only registered for the duration of the 
                   2221:     #  <translated>...</translated> block 
                   2222:     #
                   2223:     # Pathalogical case handling:
                   2224:     #   - If there is no <lang> that specifies a 'default' and there is no
                   2225:     #     translation that matches a preferred language, nothing is rendered.
                   2226:     #   - Nested <translated>...</translated> might be linguistically supported by
                   2227:     #     XML due to the stack nature of tag registration(?) however the rendered
                   2228:     #     output will be incorrect because there is only one %available_texts
                   2229:     #     has and end_translated clears it.
                   2230:     #   - Material outside of a <lang>...</lang> block within the
                   2231:     #     <translated>...<translated> block won't render either e.g.:
                   2232:     #    <translated>
                   2233:     #      The following will be in your preferred langauge:
                   2234:     #      <lang which='en'>
                   2235:     #         This section in english
                   2236:     #      </lang>
                   2237:     #      <lang which='sgeiso'>
                   2238:     #         Hier es ist auf Deutsch.
                   2239:     #      </lang>
                   2240:     #      <lang which='sfriso'>
                   2241:     #         En Francais
                   2242:     #      </lang>
                   2243:     #    </translated>
                   2244:     #
                   2245:     #    The introductory text prior to the first <lang> tag is not rendered.
                   2246:     #
1.397     albertel 2247:     sub start_translated {
                   2248: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2249: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   2250: 	undef(%available_texts);
                   2251:     }
                   2252:     
                   2253:     sub end_translated {
                   2254: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2255: 	my $result;
                   2256: 	#show the translation on viewable targets
                   2257: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   2258: 	    # or non-viewable targets, if it's embedded in something that
                   2259: 	    # wants the output
                   2260: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   2261: 	     && &Apache::lonxml::in_redirection() ) ) {
                   2262: 	    my @possibilities = keys(%available_texts);
                   2263: 	    my $which = 
                   2264: 		&Apache::loncommon::languages(\@possibilities) || 'default';
1.500     foxr     2265: 	    if ($target eq 'tex') {
                   2266: 		$result = &select_hyphenation($which);
                   2267: 	    }
                   2268: 	    $result .= $available_texts{$which};
                   2269: 	    if ($target eq 'tex') {
                   2270: 		$result .= &select_metadata_hyphenation(); # Restore original language.
                   2271: 	    }
1.397     albertel 2272: 	}
                   2273: 	undef(%available_texts);
                   2274: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   2275: 	return $result;
                   2276:     }
                   2277: 
1.500     foxr     2278:     # <lang [which='language-name'] [other='lang1,lang2...']>  
                   2279:     #  Specifies that the block contained within it is a translation 
                   2280:     #  for a specific language specified by the 'which' attribute. The
                   2281:     #   'other' attribute can be used by itself or in conjunction with
                   2282:     #   which to specify this tag _may_ be used as a translation for some
                   2283:     #   list of languages. e.g.:  <lang which='senisoUS' other='senisoCA,senisoAU,seniso'>
                   2284:     #   specifying that the block provides a translation for US (primary)
                   2285:     #   Canadian, Australian and UK Englush.
                   2286:     #   
                   2287:     # Comment: this seems a bit silly why not just support a list of languages
                   2288:     #           e.g. <lang which='l1,l2...'> and ditch the other attribute?
                   2289:     #
                   2290:     #  Effect:
                   2291:     #    The material within the <lang>..</lang> block is stored in the
                   2292:     #    specified set of $available_texts hash entries, the appropriate one
                   2293:     #    is selected at </translated> time.
                   2294:     #
                   2295:     #  Pathalogical case handling:
                   2296:     #    If a language occurs multiple times within a <translated> block,
                   2297:     #    only the last one is rendered e.g.:
                   2298:     #
                   2299:     #    <translated>
                   2300:     #       <lang which='senisoUS', other='senisoCA,senisoAU,seniso'>
                   2301:     #          Red green color blindness is quite common affecting about 7.8% of 
                   2302:     #          the male population, but onloy about .65% of the female population.
                   2303:     #       </lang>
                   2304:     #          Red green colour blindness is quite common affecting about 7.8% of 
                   2305:     #          the male population, but onloy about .65% of the female population.
                   2306:     #       <lang which='seniso', other='senisoCA,senisoAU'>
                   2307:     #     </translated>
                   2308:     #
                   2309:     #    renders the correct spelling of color (colour) for people who have specified
                   2310:     #    a preferred language that is one of the British Commonwealth languages
                   2311:     #    even though those are also listed as valid selections for the US english
                   2312:     #    <lang> block.
                   2313:     #
1.397     albertel 2314:     sub start_lang {
                   2315: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2316: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   2317: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   2318: 	    &Apache::lonxml::startredirection();
                   2319: 	}
                   2320: 	return '';
                   2321:     }
                   2322: 
                   2323:     sub end_lang {
                   2324: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2325: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   2326: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   2327: 	    my $result = &Apache::lonxml::endredirection();
                   2328: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   2329: 						   $safeeval);
1.431     raeburn  2330:             if ($which=~/\w/) {
                   2331:                 $available_texts{$which} = $result;
                   2332:             }
                   2333:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   2334:                                                         $safeeval);
                   2335:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   2336:                 if ($language=~/\w/) {
                   2337:                     $available_texts{$language} = $result;
                   2338:                 }
1.427     bisitz   2339:             }
                   2340: 
1.397     albertel 2341: 	}
                   2342: 	return '';
                   2343:     }
1.500     foxr     2344: }				# end langauge block specific tags.
                   2345: 
1.397     albertel 2346: 
1.170     www      2347: sub start_instructorcomment {
1.201     albertel 2348:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      2349: 
                   2350:     my $result;
                   2351: 
1.339     albertel 2352:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   2353: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.468     raeburn  2354:         $result=($env{'request.role'}=~/^(in|cc|co|au|ca|li)/);
1.284     albertel 2355: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 2356: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   2357: 						   $parser,$style);
1.170     www      2358: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   2359: 	}
                   2360: 	$result='';
                   2361:     } elsif ($target eq 'edit') {
                   2362: 	$result .=&Apache::edit::tag_start($target,$token);
                   2363: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2364:     }
                   2365:     return $result;
                   2366: }
                   2367: 
                   2368: sub end_instructorcomment {
1.159     albertel 2369:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 2370:     my $result;
                   2371:     if ($target eq "edit") {
                   2372: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   2373:     }
                   2374:     return $result;
1.4       tsai     2375: }
                   2376: 
                   2377: sub start_while {
1.326     albertel 2378:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2379: 
1.160     albertel 2380:     my $result;
1.339     albertel 2381:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   2382: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 2383: 	my $code = $token->[2]->{'condition'};
1.4       tsai     2384: 
1.160     albertel 2385: 	push( @Apache::structuretags::whileconds, $code);
                   2386: 	if (!$Apache::lonxml::default_homework_loaded) {
                   2387: 	    &Apache::lonxml::default_homework_load($safeeval);
                   2388: 	}
                   2389: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 2390: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 2391: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 2392: 	push( @Apache::structuretags::whileline, $token->[5]);
                   2393: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 2394: 	if ( $result ) {
                   2395: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   2396: 	}
                   2397:     } elsif ($target eq 'edit') {
                   2398: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 2399: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 2400: 					  $token,40);
                   2401: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2402:     } elsif ($target eq 'modified') {
                   2403: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2404: 						     $safeeval,'condition');
                   2405: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 2406:     }
1.160     albertel 2407:     return $result;
1.4       tsai     2408: }
                   2409: 
                   2410: sub end_while {
1.159     albertel 2411:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 2412:     my $result;
                   2413: 
1.339     albertel 2414:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   2415: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 2416: 	my $code = pop(@Apache::structuretags::whileconds);
                   2417: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 2418: 	my $line = pop(@Apache::structuretags::whileline);
                   2419: 	my $return = &Apache::run::run($code,$safeeval);
                   2420: 	my $starttime=time;
                   2421: 	my $error=0;
                   2422: 	while ($return) {
                   2423: 	    if (time-$starttime >
                   2424: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 2425: 		$return = 0; $error=1; next;
1.161     albertel 2426: 	    }
                   2427: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 2428: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   2429: 		$target eq 'analyze') {
                   2430: 		# grade/answer/analyze should produce no output but if we
                   2431: 		# are redirecting, the redirecter should know what to do
                   2432: 		# with the output
                   2433: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   2434: 	    }
1.161     albertel 2435: 	    $return = &Apache::run::run($code,$safeeval);
                   2436: 	}
1.512.2.5  raeburn  2437:         if ($error) {
                   2438:             &Apache::lonxml::error(
                   2439:                 '<pre>'
                   2440:                .&mt('Code ran too long. It ran for more than [_1] seconds.',
                   2441:                         $Apache::lonnet::perlvar{'lonScriptTimeout'})
                   2442:                .&mt('This occurred while running &lt;while&gt; on line [_1].',
                   2443:                         $line)
                   2444:                .'</pre>');
                   2445:         }
1.160     albertel 2446:     } elsif ($target eq "edit") {
                   2447: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 2448:     }
1.160     albertel 2449:     return $result;
1.1       albertel 2450: }
1.6       tsai     2451: 
1.160     albertel 2452: # <randomlist show="1">
1.6       tsai     2453: #  <tag1>..</tag1>
                   2454: #  <tag2>..</tag2>
                   2455: #  <tag3>..</tag3>
1.160     albertel 2456: #  ...
1.6       tsai     2457: # </randomlist>
                   2458: sub start_randomlist {
1.326     albertel 2459:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2460:     my $result;
1.339     albertel 2461:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   2462: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 2463: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 2464: 	my $b_parser= HTML::LCParser->new(\$body);
                   2465: 	$b_parser->xml_mode(1);
                   2466: 	$b_parser->marked_sections(1);
1.159     albertel 2467: 	my $b_tok;
                   2468: 	my @randomlist;
                   2469: 	my $list_item;
                   2470: 	while($b_tok = $b_parser->get_token() ) {
                   2471: 	    if($b_tok->[0] eq 'S') { # start tag
                   2472: 		# get content of the tag until matching end tag
                   2473: 		# get all text upto the matching tag
                   2474: 		# and push the content into @randomlist
                   2475: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   2476: 							   $b_parser);
                   2477: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   2478: 		push(@randomlist,$list_item);
                   2479: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   2480:                 #         $list_item</b>";
                   2481: 	    }
                   2482: 	    if($b_tok->[0] eq 'T') { # text
                   2483: 		# what to do with text in between tags?
                   2484: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   2485: 	    }
                   2486: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   2487: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   2488: 	    # }
                   2489: 	}
1.303     albertel 2490: 	if (@randomlist) {
                   2491: 	    my @idx_arr = (0 .. $#randomlist);
                   2492: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   2493: 	    my $bodytext = '';
                   2494: 	    my $show=$#randomlist;
                   2495: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   2496: 	    $showarg--;
                   2497: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  2498:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   2499:                 my @currlist;
                   2500:                 my $part = $Apache::inputtags::part;
                   2501:                 if ($part ne '') {
                   2502:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   2503:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   2504:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   2505:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   2506:                         }
                   2507:                     } else {
                   2508:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   2509:                     }
                   2510:                 }
                   2511:             }
1.512.2.9  raeburn  2512: 	    for my $i (0 .. $show) {
                   2513: 		$bodytext .= "$randomlist[ $idx_arr[$i] ]";
1.303     albertel 2514: 	    }
                   2515: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 2516: 	}
                   2517:     } elsif ($target eq 'edit' ) {
                   2518: 	$result .=&Apache::edit::tag_start($target,$token);
                   2519: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   2520: 					   $token,5);
                   2521: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2522:     } elsif ($target eq 'modified' ) {
                   2523: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2524: 						     $safeeval,'show');
                   2525: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2526:     }
                   2527:     return $result;
1.7       tsai     2528: }
                   2529: 
                   2530: sub shuffle {
                   2531:     my $a=shift;
                   2532:     my $i;
1.303     albertel 2533:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 2534: 	&Apache::response::pushrandomnumber();
1.159     albertel 2535: 	for($i=@$a;--$i;) {
                   2536: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   2537: 	    next if $i == $j;
                   2538: 	    @$a[$i,$j] = @$a[$j,$i];
                   2539: 	}
1.251     albertel 2540: 	&Apache::response::poprandomnumber();
1.7       tsai     2541:     }
1.6       tsai     2542: }
                   2543: 
                   2544: sub end_randomlist {
1.159     albertel 2545:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2546:     my $result;
                   2547:     if ($target eq 'edit' ) {
                   2548: 	$result=&Apache::edit::tag_end($target,$token,
                   2549: 				       'End Randomly Parsed Block');
                   2550:     }
                   2551:     return $result;
1.6       tsai     2552: }
                   2553: 
1.283     albertel 2554: sub ordered_show_check {
                   2555:     my $last_part=$Apache::inputtags::partlist[-2];
                   2556:     my $in_order=
                   2557: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   2558:     my $in_order_show=1;
                   2559:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   2560: 	$in_order_show=&Apache::response::check_status($last_part);
                   2561:     }
                   2562:     return $in_order_show;
                   2563: }
                   2564: 
1.469     www      2565: 
                   2566: sub start_startpartmarker {
                   2567:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2568:     my $result='';
                   2569:     if ($target eq 'edit') {
                   2570:         $result=&Apache::edit::tag_start($target,$token);
                   2571:         $result.=&mt('Marker for the start of a part. Place end marker below to wrap in-between tags into a new part.').'</td></tr>';
                   2572:         $result.=&Apache::edit::end_table();
                   2573: 
                   2574:     } 
                   2575:     return $result;
                   2576: }
                   2577: 
                   2578: sub end_startpartmarker {
                   2579:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2580:     my @result;
                   2581:     if ($target eq 'edit') { $result[1]='no'; }
                   2582:     return @result;
                   2583: }
                   2584: 
                   2585: sub start_endpartmarker {
                   2586:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2587:     my $result='';
                   2588:     if ($target eq 'edit') {
                   2589:         $result=&Apache::edit::tag_start($target,$token);
                   2590:         $result.=&mt('Marker for the end of a part. Place start marker above to wrap in-between tags into a new part.').'</td></tr>';
                   2591:         $result.=&Apache::edit::end_table();
                   2592: 
                   2593:     }
                   2594:     return $result;
                   2595: }
                   2596: 
                   2597: sub end_endpartmarker {
                   2598:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2599:     my @result;
                   2600:     if ($target eq 'edit') { $result[1]='no'; }
                   2601:     return @result;
                   2602: }
                   2603: 
                   2604: 
                   2605: 
                   2606: 
                   2607: 
1.11      albertel 2608: sub start_part {
1.326     albertel 2609:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 2610:     if (!$Apache::lonxml::metamode) {
                   2611: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   2612: 	                                     # duedates.
                   2613:     }
1.159     albertel 2614:     my $result='';
1.386     albertel 2615:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 2616:     $Apache::inputtags::part=$id;
1.177     albertel 2617:     push(@Apache::inputtags::partlist,$id);
1.512.2.10  raeburn  2618:     $Apache::inputtags::leniency='';
1.177     albertel 2619:     @Apache::inputtags::response=();
1.159     albertel 2620:     @Apache::inputtags::previous=();
                   2621:     @Apache::inputtags::previous_version=();
1.405     albertel 2622:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 2623:     &Apache::response::reset_params();
                   2624: 
1.159     albertel 2625:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 2626:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   2627:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.512.2.9  raeburn  2628:     if ($Apache::lonhomework::type eq 'randomizetry') {
                   2629:         my $rndseed=&setup_rndseed($safeeval,$target);
                   2630:         if (($target eq 'grade') && &Apache::response::submitted()) {
                   2631:             $Apache::lonhomework::results{"resource.$id.rndseed"}=$rndseed;
                   2632:         }
                   2633:     } elsif (($target eq 'grade') && &Apache::response::submitted()) {
                   2634:         $Apache::lonhomework::results{"resource.$id.rndseed"}=$Apache::lonhomework::rawrndseed;
                   2635:     }
1.283     albertel 2636:     my $in_order_show=&ordered_show_check();
1.214     albertel 2637:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 2638:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 2639:     &Apache::run::run($expression,$safeeval);
1.159     albertel 2640: 
                   2641:     if ($target eq 'meta') {
1.224     www      2642: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   2643: 	return &Apache::response::mandatory_part_meta.
                   2644: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 2645:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   2646: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 2647: 	if ($hidden || !$in_order_show) {
1.326     albertel 2648: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 2649: 	} else {
                   2650: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   2651: 	    push (@Apache::inputtags::status,$status);
                   2652: 	    my $expression='$external::datestatus="'.$status.'";';
                   2653: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   2654: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 2655: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 2656: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 2657: 	    }
1.216     albertel 2658: 	    if (( $status eq 'CLOSED' ) ||
                   2659: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 2660: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 2661: 		( $status eq 'BANNED') ||
                   2662: 		( $status eq 'UNAVAILABLE') ||
                   2663: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 2664: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   2665: 							   $style);
1.159     albertel 2666: 		if ( $target eq "web" ) {
1.211     albertel 2667: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 2668: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 2669: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 2670: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 2671: 		    } else {
1.211     albertel 2672: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 2673: 		    }
1.159     albertel 2674: 		}
                   2675: 	    } else {
                   2676: 		if ($target eq 'tex') {
1.284     albertel 2677: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 2678: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     2679: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 2680: 			} else {
                   2681: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   2682: 			}
1.195     sakharuk 2683: 		    }
1.159     albertel 2684: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 2685: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.512.2.9  raeburn  2686: 		    my @allkeys = split(/,/,$allkeys);
1.222     sakharuk 2687: 		    my $allow_print_points = 0;
                   2688: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 2689: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 2690: 			    if ($1 ne '0') {$allow_print_points=1;}
                   2691: 			}
                   2692: 		    }
1.275     albertel 2693: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   2694: 		    if (defined($maxtries) && $maxtries < 0) {
                   2695: 			$allow_print_points=0;
                   2696: 		    }
1.302     albertel 2697: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   2698: 				    '.disableexampointprint'}) eq 'yes') {
                   2699: 			$allow_print_points=0;
                   2700: 		    }
1.463     foxr     2701: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { 
1.492     christia 2702: 			$result .= '\vskip 10mm\fbox{\textit{'.&mt('[quant,_1,pt,pt]',$weight ).'}}';
1.463     foxr     2703: 
                   2704: 		    }
1.233     www      2705: 		} elsif ($target eq 'web') {
1.479     raeburn  2706:                     if ($status eq 'CAN_ANSWER') {
                   2707:                         my $problemstatus = &get_problem_status($Apache::inputtags::part); 
                   2708:                         my $probrandomize = &Apache::lonnet::EXT("resource.$Apache::inputtags::partlist[0].type");
                   2709:                         my $probrandtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::partlist[0].randomizeontries");
                   2710:                         my $num = scalar(@Apache::inputtags::partlist)-1;
                   2711:                         if ($probrandomize eq 'randomizetry') {
                   2712:                             if (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.type") ne 'randomizetry') {
                   2713:                                 $result .= &randomizetry_part_header($problemstatus,'none',$num);
                   2714:                             } else {
                   2715:                                 my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
                   2716:                                 if ($probrandtries ne $reqtries) {
                   2717:                                     $result .= &randomizetry_part_header($problemstatus,$reqtries,$num);
                   2718:                                 }
                   2719:                             }
                   2720:                         } elsif (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.type") eq 'randomizetry') {
                   2721:                             my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
                   2722:                             $result .= &randomizetry_part_header($problemstatus,$reqtries,$num);
                   2723:                         }
                   2724:                     }
1.475     raeburn  2725: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" ></a>';
1.159     albertel 2726: 		}
                   2727: 	    }
                   2728: 	}
                   2729:     } elsif ($target eq 'edit') {
                   2730: 	$result.=&Apache::edit::tag_start($target,$token);
                   2731: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   2732: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      2733: 	    '&nbsp;&nbsp;'.
                   2734: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 2735: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2736:     } elsif ($target eq 'modified') {
                   2737: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 2738: 						     $safeeval,'id','display');
1.159     albertel 2739: 	if ($constructtag) {
1.225     albertel 2740: 	    #limiting ids to only letters numbers, and space
1.224     www      2741: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 2742: 	    $result = &Apache::edit::rebuild_tag($token);
                   2743: 	}
                   2744:     }
                   2745:     return $result;
1.11      albertel 2746: }
                   2747: 
                   2748: sub end_part {
1.159     albertel 2749:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2750:     &Apache::lonxml::debug("in end_part $target ");
                   2751:     my $status=$Apache::inputtags::status['-1'];
                   2752:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 2753:     my $in_order_show=&ordered_show_check();
1.321     albertel 2754:     my $result;
                   2755:     if (!$Apache::lonxml::metamode) {
                   2756: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 2757: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 2758:     }
1.312     albertel 2759:     if ($target eq 'grade') {
1.249     albertel 2760: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 2761: 	    !$hidden && $in_order_show) {
1.311     foxr     2762: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 2763: 	} else {
                   2764: 	    # move any submission data to .hidden
                   2765: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   2766: 	}
1.283     albertel 2767:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   2768: 	     !$hidden && $in_order_show) {
1.159     albertel 2769: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   2770: 							$target);
1.490     raeburn  2771: 	if (($Apache::lonhomework::type eq 'exam' && $target eq 'tex') ||
                   2772:              ($env{'form.grade_imsexport'})) {
1.212     albertel 2773: 	    $gradestatus='';
                   2774: 	}
1.311     foxr     2775: 	$result.=$gradestatus;
1.265     sakharuk 2776: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 2777:     } elsif ($target eq 'edit') {
1.311     foxr     2778: 	$result.=&Apache::edit::end_table();
1.322     albertel 2779:     } elsif ($target eq 'modified') {
                   2780: 	 $result .= $token->[2];
1.159     albertel 2781:     }
                   2782:     pop @Apache::inputtags::status;
                   2783:     $Apache::inputtags::part='';
1.512.2.10  raeburn  2784:     $Apache::inputtags::leniency='';
1.295     albertel 2785:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 2786:     return $result;
1.11      albertel 2787: }
1.1       albertel 2788: 
1.25      albertel 2789: sub start_preduedate {
1.326     albertel 2790:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 2791:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   2792: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 2793: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 2794: 	if (!$Apache::lonhomework::scantronmode &&
                   2795: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 2796: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   2797: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 2798: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 2799: 	}
1.24      albertel 2800:     }
1.159     albertel 2801:     return '';
1.24      albertel 2802: }
                   2803: 
1.25      albertel 2804: sub end_preduedate {
1.159     albertel 2805:     return '';
1.24      albertel 2806: }
                   2807: 
1.369     foxr     2808: # In all the modes where <postanswerdate> text is 
                   2809: # displayable,  all we do is eat up the text between the start/stop
                   2810: # tags if the conditions are not right to display it.
1.25      albertel 2811: sub start_postanswerdate {
1.326     albertel 2812:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     2813:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   2814: 	&Apache::lonnet::allowed('pav',
                   2815: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     2816:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     2817: 	$target eq 'tex' ) {
1.300     albertel 2818: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     2819: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   2820: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 2821: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 2822: 	}
                   2823:     }
                   2824:     return '';
1.24      albertel 2825: }
                   2826: 
1.25      albertel 2827: sub end_postanswerdate {
1.159     albertel 2828:     return '';
1.24      albertel 2829: }
                   2830: 
1.25      albertel 2831: sub start_notsolved {
1.326     albertel 2832:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2833:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 2834: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 2835: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   2836: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 2837: 	if ($gradestatus =~ /^correct/ &&
                   2838: 	    &Apache::response::show_answer()) {
1.159     albertel 2839: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 2840: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 2841: 	}
1.24      albertel 2842:     }
1.159     albertel 2843:     return '';
1.24      albertel 2844: }
                   2845: 
1.25      albertel 2846: sub end_notsolved {
1.159     albertel 2847:     return '';
1.24      albertel 2848: }
                   2849: 
                   2850: sub start_solved {
1.326     albertel 2851:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2852:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   2853: 	$target eq 'tex') {
                   2854: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 2855: 	if ($gradestatus !~ /^correct/ ||
                   2856: 	    !&Apache::response::show_answer()) {
1.326     albertel 2857: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 2858: 	}
1.24      albertel 2859:     }
1.159     albertel 2860:     return '';
1.24      albertel 2861: }
                   2862: 
                   2863: sub end_solved {
1.248     albertel 2864:     return '';
                   2865: }
                   2866: 
                   2867: sub start_problemtype {
1.326     albertel 2868:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 2869:     my $result;
1.339     albertel 2870:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   2871: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 2872: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   2873: 	if (!defined($mode)) { $mode='show'; }
                   2874: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   2875: 	my $found=0;
                   2876: 	foreach my $type (split(',',$for)) {
                   2877: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   2878: 	}
                   2879: 	if ($mode eq 'show' && !$found) {
1.326     albertel 2880: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 2881: 	}
                   2882: 	if ($mode eq 'hide' && $found) {
1.326     albertel 2883: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 2884: 	}
                   2885:     } elsif ($target eq 'edit') {
                   2886: 	$result .=&Apache::edit::tag_start($target,$token);
                   2887: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   2888: 					   [['show','Show'],
                   2889: 					    ['hide','Hide']]
                   2890: 					   ,$token);
                   2891: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
1.512.2.2  raeburn  2892: 					     [ ['exam','Exam/Quiz Problem'],
1.248     albertel 2893: 					       ['survey','Survey'],
1.465     raeburn  2894:                                                ['surveycred','Survey (with credit)'],
                   2895:                                                ['anonsurvey','Anonymous Survey'],
                   2896:                                                ['anonsurveycred','Anonymous Survey (with credit)'],
1.428     raeburn  2897: 					       ['problem','Homework Problem'],
1.479     raeburn  2898:                                                ['practice','Practice Problem'],
                   2899:                                                ['randomizetry','New Randomization Each Try'] ]
1.248     albertel 2900: 					     ,$token);
                   2901: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2902:     } elsif ($target eq 'modified') {
                   2903: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2904: 						     $safeeval,'mode','for');
                   2905: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2906:     }
                   2907:     return $result;
                   2908: }
                   2909: 
                   2910: sub end_problemtype {
1.159     albertel 2911:     return '';
1.24      albertel 2912: }
1.34      albertel 2913: 
                   2914: sub start_startouttext {
1.159     albertel 2915:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2916:     my @result=(''.'');
                   2917:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 2918:     
                   2919:     my $nesting = 
                   2920: 	&Apache::lonxml::set_state('outtext',
                   2921: 				   &Apache::lonxml::get_state('outtext')+1);
                   2922:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   2923: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   2924:     }
1.159     albertel 2925:     return (@result);
1.34      albertel 2926: }
1.159     albertel 2927: 
1.34      albertel 2928: sub end_startouttext {
1.326     albertel 2929:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2930:     my $result='';
                   2931:     my $text='';
                   2932:     if ($target eq 'edit') {
1.424     foxr     2933: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 2934: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.512.2.11  raeburn  2935:         $result.=&Apache::edit::start_table($token)."<tr><td>".&Apache::loncommon::insert_folding_button()
                   2936:                  ." ".&mt('Text Block')."</td>"
1.438     bisitz   2937:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  2938:                  .&Apache::edit::deletelist($target,$token)
1.474     raeburn  2939:                  .'</span></td>'
1.512.2.12! raeburn  2940: 	         .'<td><span id="math_'.$areaid.'">';
        !          2941: 	if ($env{'environment.nocodemirror'}) {
        !          2942: 	    $result.=&Apache::lonhtmlcommon::dragmath_button($areaid,1);
        !          2943: 	} else {
        !          2944: 	    $result.='&nbsp;';
        !          2945: 	}
        !          2946: 	$result.='</span></td>'
1.474     raeburn  2947: 		 .'<td>'
                   2948: 		 .&Apache::edit::insertlist($target,$token)
                   2949: 		 .'</td>'
1.512.2.5  raeburn  2950: 	         .'<td class="LC_edit_problem_latexhelper">' .
1.474     raeburn  2951: 	         &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 2952: 		 &Apache::edit::end_row().
1.362     albertel 2953:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      2954: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 2955:     }
                   2956:     if ($target eq 'modified') {
1.219     albertel 2957: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 2958:     }
                   2959:     if ($target eq 'tex') {
                   2960: 	$result .= '\noindent ';
                   2961:     }
                   2962:     return $result;
1.34      albertel 2963: }
1.159     albertel 2964: 
1.34      albertel 2965: sub start_endouttext {
1.159     albertel 2966:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2967:     my $result='';
                   2968:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   2969:     if ($target eq "modified") {
                   2970: 	$result='<endouttext />'.
1.377     albertel 2971: 	    &Apache::edit::handle_insertafter('startouttext');
                   2972:     }
1.404     albertel 2973: 
                   2974:     my $nesting = 
                   2975: 	&Apache::lonxml::set_state('outtext',
                   2976: 				   &Apache::lonxml::get_state('outtext')-1);
                   2977:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2978: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2979: 	&Apache::lonxml::set_state('outtext', 0);
                   2980:     }
1.159     albertel 2981:     return $result;
1.34      albertel 2982: }
1.159     albertel 2983: 
1.34      albertel 2984: sub end_endouttext {
1.159     albertel 2985:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2986:     my @result=('','');
                   2987:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2988:     return (@result);
1.34      albertel 2989: }
1.159     albertel 2990: 
1.45      albertel 2991: sub delete_startouttext {
1.326     albertel 2992:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2993:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2994:     my $text=$$parser['-1']->get_text("/endouttext");
                   2995:     my $ntoken=$$parser['-1']->get_token();
                   2996:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2997:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2998:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2999:     # they did the last time round
                   3000:     &Apache::lonxml::increasedepth($ntoken);
                   3001:     &Apache::lonxml::decreasedepth($ntoken);
                   3002:     return 1;
1.193     www      3003: }
                   3004: 
                   3005: sub start_simpleeditbutton {
                   3006:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   3007:     my $result='';
1.284     albertel 3008:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 3009: 	($target eq 'web') &&
1.330     albertel 3010:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 3011:         my $url=$env{'request.noversionuri'};
1.193     www      3012:         $url=~s/\?.*$//;
1.367     albertel 3013: 	my ($symb) = &Apache::lonnet::whichuser();
1.451     bisitz   3014: #       Warning makes more sense and is more important on edit screen
1.442     bisitz   3015: #       $result='<p class="LC_warning">'
                   3016: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
                   3017: #              .&Apache::loncommon::help_open_topic('Caching')
                   3018: #              .'</p>';
1.486     www      3019:         $result.=&Apache::loncommon::head_subbox(
                   3020:                  &Apache::lonhtmlcommon::start_funclist()
1.451     bisitz   3021:                 .&Apache::lonhtmlcommon::add_item_funclist(
                   3022:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'
                   3023:                     .&mt('Edit').'</a>')
1.486     www      3024:                 .&Apache::lonhtmlcommon::end_funclist());
1.442     bisitz   3025: 
1.193     www      3026:     }
                   3027:     return $result;
                   3028: }
                   3029: 
                   3030: sub end_simpleeditbutton {
                   3031:     return '';
1.45      albertel 3032: }
1.34      albertel 3033: 
1.428     raeburn  3034: sub practice_problem_header {
                   3035:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   3036:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   3037:            '</span>';
                   3038: }
                   3039: 
1.479     raeburn  3040: sub randomizetry_problem_header {
                   3041:     my ($problemstatus,$reqtries) = @_;
                   3042:     my ($header,$text);
                   3043:     if ($reqtries > 1) {
                   3044:         $header = &mt('New Problem Variation After Every [quant,_1,Try,Tries]',$reqtries);
                   3045:         if (($problemstatus eq 'no') ||
                   3046:             ($problemstatus eq 'no_feedback_ever')) {
                   3047:             $text = &mt('A new variation will be generated after every [quant,_1,try,tries], until the tries limit is reached.',$reqtries);
                   3048:         } else {
                   3049:             $text = &mt('A new variation will be generated after every [quant,_1,try,tries], until correct or tries limit is reached.',$reqtries);
                   3050:         }
                   3051:     } else {
                   3052:         $header = &mt('New Problem Variation Each Try');
                   3053:         if (($problemstatus eq 'no') ||
                   3054:             ($problemstatus eq 'no_feedback_ever')) {
                   3055:             $text = &mt('A new variation will be generated after each try until the tries limit is reached.');
                   3056: 
                   3057:         } else {
                   3058:             $text = &mt('A new variation will be generated after each try until correct or tries limit is reached.');
                   3059:         }
                   3060:     }
                   3061:     return '<span class="LC_info"><h3>'.$header.'</h3></span>'.
                   3062:            '<span class="LC_info">'.$text.'</span><hr />';
                   3063: }
                   3064: 
                   3065: sub randomizetry_part_header {
                   3066:     my ($problemstatus,$reqtries,$num) = @_;
                   3067:     my ($header,$text);
                   3068:     if ($reqtries eq 'none') {
                   3069:         $header = &mt('No Question Variation');
                   3070:         $text = &mt('For this question there will no new variation after a try.');
                   3071:     } elsif ($reqtries > 1) {
                   3072:         $header = &mt('New Question Variation After Every [quant,_1,Try,Tries]',$reqtries);
                   3073:         if (($problemstatus eq 'no') ||
                   3074:             ($problemstatus eq 'no_feedback_ever')) {
                   3075:             $text = &mt('For this question a new variation will be generated after every [quant,_1,try,tries], until the tries limit is reached.',$reqtries);
                   3076:         } else {
                   3077:             $text = &mt('For this question a new variation will be generated after every [quant,_1,try,tries], until correct or tries limit is reached.',$reqtries);
                   3078:         }
                   3079:     } else {
                   3080:         $header = &mt('New Question Variation For Each Try');
                   3081:         if (($problemstatus eq 'no') ||
                   3082:             ($problemstatus eq 'no_feedback_ever')) {
                   3083:             $text =  &mt('For this question a new variation will be generated after each try until the tries limit is reached.');
                   3084:         } else {
                   3085:             $text = &mt('For this question a new variation will be generated after each try until correct or tries limit is reached.');
                   3086:         }
                   3087:     }
                   3088:     my $output;
                   3089:     if ($num > 1) {
                   3090:         $output .= '<hr />';
                   3091:     }
                   3092:     $output .=  '<span class="LC_info"><h4>'.$header.'</h4></span>'.
                   3093:                   '<span class="LC_info">'.$text.'</span><br /><br />';
                   3094:     return $output;
                   3095: }
                   3096: 
1.1       albertel 3097: 1;
                   3098: __END__
1.435     jms      3099: 
                   3100: =pod
                   3101: 
                   3102: =back
                   3103: 
                   3104: =cut

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