Annotation of loncom/homework/structuretags.pm, revision 1.467

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.467   ! www         4: # $Id: structuretags.pm,v 1.466 2010/03/10 21:25:36 droeschl Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.254     www        28: ###
1.54      www        29: 
1.435     jms        30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
                     34: Apache::structuretags
                     35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: 
                     39: This is part of the LearningOnline Network with CAPA project
                     40: described at http://www.lon-capa.org.
                     41: 
                     42: 
                     43: =head1 NOTABLE SUBROUTINES
                     44: 
                     45: =over
                     46: 
                     47: =item 
                     48: 
                     49: =back
                     50: 
                     51: =cut
                     52: 
1.133     sakharuk   53: 
1.1       albertel   54: package Apache::structuretags; 
                     55: 
                     56: use strict;
                     57: use Apache::lonnet;
1.101     sakharuk   58: use Apache::File();
1.147     www        59: use Apache::lonmenu;
1.210     albertel   60: use Apache::lonlocal;
1.231     sakharuk   61: use Apache::lonxml;
1.434     foxr       62: use Apache::londefdef;
1.338     albertel   63: use Apache::lonenc();
1.267     albertel   64: use Time::HiRes qw( gettimeofday tv_interval );
1.356     www        65: use lib '/home/httpd/lib/perl/';
                     66: use LONCAPA;
                     67:  
1.78      harris41   68: BEGIN {
1.397     albertel   69:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
1.10      albertel   70: }
                     71: 
                     72: sub start_web {
1.326     albertel   73:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.383     albertel   74:     if ($target ne 'edit' && $target ne 'modified') {
                     75: 	my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
                     76: 	if ($target eq 'web' || $target eq 'webgrade') {
                     77: 	    return $bodytext;
                     78: 	}
                     79:     } elsif ($target eq "edit" ) {
                     80: 	my $bodytext = 
                     81: 	    &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
                     82: 	my $result = &Apache::edit::tag_start($target,$token);
                     83: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                     84: 	return $result;
                     85:     } elsif ( $target eq "modified" ) {
                     86: 	return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
1.159     albertel   87:     }
                     88:     return '';
1.10      albertel   89: }
                     90: 
                     91: sub end_web {
1.44      ng         92:     return '';
1.10      albertel   93: }
                     94: 
                     95: sub start_tex {
1.326     albertel   96:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.198     sakharuk   97:     my $result='';
1.383     albertel   98:     if ($target ne 'edit' && $target ne 'modified') {
                     99: 	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
                    100: 	if ($target eq 'tex') {
1.434     foxr      101: 	    
                    102: 	    # If inside a table, occurrences of \\ must be removed;
                    103: 	    # else the table blows up.
                    104: 
                    105: 	    if (&Apache::londefdef::is_inside_of($tagstack, "table")) {
                    106: 		$bodytext =~ s/\\\\//g;
                    107: 	    }
1.432     foxr      108: 	    return $bodytext.'{}';
1.383     albertel  109: 	}
                    110:     } elsif ($target eq "edit" ) {
                    111: 	my $bodytext = 
                    112: 	    &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
                    113: 	my $result = &Apache::edit::tag_start($target,$token);
                    114: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                    115: 	return $result;
                    116:     } elsif ( $target eq "modified" ) {
                    117: 	return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
1.159     albertel  118:     }
1.198     sakharuk  119:     return $result;;
1.10      albertel  120: }
                    121: 
                    122: sub end_tex {
1.44      ng        123:     return '';
1.9       albertel  124: }
                    125: 
1.400     albertel  126: sub homework_js {
                    127:     return &Apache::loncommon::resize_textarea_js().
1.416     raeburn   128:            &setmode_javascript().
1.400     albertel  129: 	<<'JS';
                    130: <script type="text/javascript">
                    131: function setSubmittedPart (part) {
                    132:    this.document.lonhomework.submitted.value="part_"+part;
                    133: }
                    134: 
                    135: function image_response_click (which, e) {
                    136:     init_geometry();
                    137:     if (!e) { e = window.event; } //IE
                    138:     var input_element = document.lonhomework.elements[which];
1.401     albertel  139:     var token_element = document.lonhomework.elements[which+'_token'];
1.400     albertel  140:     var token = token_element.value;
1.401     albertel  141:     var img_element   = document.getElementById(which+'_imageresponse');
1.400     albertel  142:     var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
                    143:     var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
                    144:     var click = x+':'+y;
                    145:     input_element.value = click;
                    146:     img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
                    147: }
1.416     raeburn   148: 
1.400     albertel  149: </script>
                    150: JS
                    151: }
                    152: 
1.416     raeburn   153: sub setmode_javascript {
                    154:     return <<"ENDSCRIPT";
                    155: <script type="text/javascript">
                    156: function setmode(form,probmode) {
                    157:     form.problemmode.value = probmode;
                    158:     form.submit();
                    159: }
                    160: </script>
                    161: ENDSCRIPT
                    162: }
                    163: 
1.48      albertel  164: sub page_start {
1.345     albertel  165:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                    166: 	$extra_head)=@_;
1.159     albertel  167:     my %found;
1.207     albertel  168:     foreach my $taginside (@$tagstack) {
1.159     albertel  169: 	foreach my $taglookedfor ('html','body','form') {
                    170: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    171: 	}
                    172:     }
                    173: 
1.343     albertel  174:     if ($target eq 'tex') {
                    175: 	return
                    176: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                    177: 					   $parstack,$parser,$safeeval);
                    178:     }
                    179: 
1.400     albertel  180:     $extra_head .= &homework_js();
1.374     albertel  181: 
1.434     foxr      182:     if ($env{'environment.wysiwygeditor'} eq 'on') {
                    183: 	$extra_head .= &Apache::lonhtmlcommon::dragmath_js("FCKEditMathPopup");
                    184:     } else {
                    185:         $extra_head .= &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
1.425     raeburn   186:     }
                    187: 
1.344     albertel  188:     my %body_args;
                    189:     if (defined($found{'html'})) {
                    190: 	$body_args{'skip_phases'}{'head'}=1;
                    191:     } else {
1.343     albertel  192: 	
1.345     albertel  193: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel  194: 
1.379     albertel  195: 	$extra_head .= &Apache::londefdef::generate_css_links();
                    196: 
1.384     albertel  197: 	if ($env{'request.state'} eq 'construct') {
1.343     albertel  198: 	    $extra_head.=&Apache::edit::js_change_detection().
                    199: 		"<script type=\"text/javascript\">\n".
                    200: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    201: 		&Apache::loncommon::browser_and_searcher_javascript().
                    202:                 "\n</script>\n";
                    203: 	}
1.159     albertel  204:     }
1.343     albertel  205: 
1.446     bisitz    206:     my $pageheader = '';
1.344     albertel  207:     if (defined($found{'body'})) {
                    208: 	$body_args{'skip_phases'}{'body'}=1;
                    209:     } elsif (!defined($found{'body'}) 
                    210: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  211: 	if ($target eq 'web' || $target eq 'edit') {
1.450     bisitz    212:         # Breadcrumbs for Construction Space
                    213:         &Apache::lonhtmlcommon::clear_breadcrumbs();
                    214:         &Apache::lonhtmlcommon::add_breadcrumb({
                    215:             'text'  => 'Construction Space',
                    216:             'href'  => &Apache::loncommon::authorspace(),
                    217:         });
1.460     droeschl  218:         # breadcrumbs (and tools) will be created 
                    219:         # in start_page->bodytag->innerregister
                    220: 
1.450     bisitz    221: # FIXME Where are we?
                    222: #        &Apache::lonhtmlcommon::add_breadcrumb({
                    223: #            'text'  => 'Problem Editing', # 'Problem Testing'
                    224: #            'href'  => '',
                    225: #        });
1.460     droeschl  226:         $pageheader =&Apache::loncommon::head_subbox(
1.446     bisitz    227:                 &Apache::loncommon::CSTR_pageheader());
1.297     albertel  228: 	}
1.272     albertel  229:     } elsif (!defined($found{'body'})) {
1.343     albertel  230: 	my %add_entries;
1.159     albertel  231: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    232: 						  $safeeval);
1.343     albertel  233: 	if ($background ne '' ) {
                    234: 	    $add_entries{'background'} = $background;
                    235: 	}
1.344     albertel  236: 
1.290     albertel  237: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    238: 					       $safeeval);
1.446     bisitz    239:         if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
1.344     albertel  240: 
1.446     bisitz    241:         $body_args{'bgcolor'}        = $bgcolor;
                    242:         # $body_args{'no_title'}       = 1;
                    243:         $body_args{'force_register'} = 1;
                    244:         $body_args{'add_entries'}    = \%add_entries;
1.466     droeschl  245:         if ( $env{'request.state'} eq   'construct') {
1.446     bisitz    246:             $body_args{'only_body'}  = 1;
                    247:         }
1.344     albertel  248:     }
1.365     albertel  249:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  250:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    251: 						    \%body_args);
1.446     bisitz    252:     $page_start .= $pageheader;
1.462     raeburn   253:     if (!defined($found{'body'}) 
                    254: 	&& $env{'request.state'} ne 'construct'
                    255: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    256: 
                    257: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
                    258:         if ($symb eq '' && !$publicuser) {
                    259:             $page_start .= '<p class="LC_info">'
                    260:                           .&mt('Browsing resource, all submissions are temporary.')
                    261:                           .'</p>';
1.457     bisitz    262:         }
1.344     albertel  263:     }
                    264: 
1.409     albertel  265:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  266: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  267:     }
1.344     albertel  268:     
1.159     albertel  269:     my $form_tag_start;
                    270:     if (!defined($found{'form'})) {
1.337     albertel  271: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.465     raeburn   272: 	my $uri = &Apache::loncommon::inhibit_menu_check(
1.455     droeschl  273:                 &Apache::lonenc::check_encrypt($env{'request.uri'}));
1.464     raeburn   274:         $uri = &HTML::Entities::encode($uri,'<>&"');
1.327     albertel  275: 	$form_tag_start.=$uri.'" ';
                    276: 	if ($target eq 'edit') {
                    277: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    278: 	}
1.368     albertel  279: 	$form_tag_start.='>'."\n";
1.355     albertel  280: 
                    281: 	my $symb=&Apache::lonnet::symbread();
                    282: 	if ($symb =~ /\S/) {
                    283: 	    $symb=
                    284: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    285: 	    $form_tag_start.=
1.368     albertel  286: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  287: 	}
1.159     albertel  288:     }
1.343     albertel  289:     return ($page_start,$form_tag_start);
1.105     albertel  290: }
                    291: 
1.141     matthew   292: #use Time::HiRes();
1.105     albertel  293: sub get_resource_name {
1.159     albertel  294:     my ($parstack,$safeeval)=@_;
1.388     foxr      295:     my $name;
1.204     albertel  296:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      297: 	$name = $Apache::lonhomework::name;
                    298:     } else {
                    299: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  300: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      301: 	if ($name eq '') {
                    302: 	    $name=&Apache::lonnet::EXT('resource.title');
                    303: 	    if ($name eq 'con_lost') { $name = ''; }
                    304: 	}
                    305: 	if ($name!~/\S+/) {
                    306: 	    $name=$env{'request.uri'};
                    307: 	    $name=~s-.*/([^/]+)$-$1-;
                    308: 	}
                    309: 	# The name has had html tags escaped:
                    310:        
                    311: 	$name=~s/&lt;/</gs;
                    312: 	$name=~s/&gt;/>/gs;
                    313: 
                    314: 	$Apache::lonhomework::name=$name;
1.204     albertel  315:     }
1.159     albertel  316:     return $name;
1.105     albertel  317: }
                    318: 
                    319: sub setup_rndseed {
1.159     albertel  320:     my ($safeeval)=@_;
                    321:     my $rndseed;
1.367     albertel  322:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  323:     if ($env{'request.state'} eq "construct" 
                    324: 	|| $symb eq '' 
                    325: 	|| $Apache::lonhomework::type eq 'practice'
                    326: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       327: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  328: 						['rndseed']);
1.284     albertel  329: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  330: 	if (!$rndseed) {
1.162     albertel  331: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    332: 	    if (!$rndseed) {
                    333: 		$rndseed=time;
                    334: 	    }
1.284     albertel  335: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  336: 	}
1.374     albertel  337: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    338: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  339: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  340: 	    srand(time);
                    341: 	    $rndseed=int(rand(2100000000));
1.284     albertel  342: 	    $env{'form.rndseed'}=$rndseed;
                    343: 	    delete($env{'form.resetdata'});
                    344: 	    delete($env{'form.newrandomization'});
1.159     albertel  345: 	}
1.187     albertel  346: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  347: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  348:         }
1.247     albertel  349:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    350: 	   $rndseed=&Apache::lonnet::rndseed();
                    351: 	}
1.221     albertel  352: 	if ($safeeval) {
                    353: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  354: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  355: 	}
1.159     albertel  356:     }
                    357:     return $rndseed;
1.105     albertel  358: }
                    359: 
1.268     albertel  360: sub remember_problem_state {
                    361:     return '
1.284     albertel  362:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    363:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    364:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  365: }
                    366: 
1.423     www       367: sub problem_edit_buttons {
                    368:    return  '
1.408     albertel  369: <div class="LC_edit_problem_discards">
1.416     raeburn   370:        <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
1.423     www       371:        ' onclick="javscript:setmode(this.form,'."'discard'".')"  />
1.416     raeburn   372:        <input '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'editxml'".')').' type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" />
1.407     albertel  373:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.408     albertel  374: </div>
                    375: <div class="LC_edit_problem_saves">
1.416     raeburn   376:        <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save and Edit').'" />
                    377:        <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
1.423     www       378: </div>';
                    379: }
                    380: 
                    381: sub problem_edit_header {
                    382:     return '<input type="hidden" name="submitted" value="edit" /><input type="hidden" name="problemmode" value="edit" />'.
                    383: 	&Apache::structuretags::remember_problem_state().'
                    384: <div class="LC_edit_problem_header">
                    385: <div class="LC_edit_problem_header_title">
                    386: '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    387: </div>'.
                    388: &problem_edit_buttons().'
1.459     bisitz    389: <hr style="clear:both;" />
1.409     albertel  390: '.&Apache::lonxml::message_location().'
1.408     albertel  391: </div>
                    392: '.
1.458     bisitz    393:        '<table border="0" width="100%"><tr><td bgcolor="#F8F8F8">';
1.105     albertel  394: }
                    395: 
                    396: sub problem_edit_footer {
1.412     albertel  397:     return '</td></tr></table><br />
                    398: <div class="LC_edit_problem_footer">
1.453     bisitz    399:   <hr />'.
1.423     www       400: &problem_edit_buttons().'
1.459     bisitz    401:   <hr style="clear:both;" />
1.412     albertel  402: </div>
                    403: '.
                    404: 
1.348     albertel  405:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  406:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  407: }
                    408: 
1.235     albertel  409: sub option {
                    410:     my ($value,$name) = @_;
                    411:     my $result ="<option value='".$value."' ";
1.284     albertel  412:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  413: 	$result.=" selected='on' ";
                    414:     }
                    415:     $result.='>';
                    416:     return $result;
                    417: }
                    418: 
1.105     albertel  419: sub problem_web_to_edit_header {
1.159     albertel  420:     my ($rndseed)=@_;
1.406     albertel  421:     my $result .= '<div class="LC_edit_problem_header">';
                    422: 
                    423:     if (!$Apache::lonhomework::parsing_a_task) {
                    424: 	$result .= 
                    425: 	    '<div class="LC_edit_problem_header_title">'.
                    426: 	    &mt('Problem Testing').
                    427: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    428: 	    '</div>';
                    429:     } else {
                    430: 	$result .= 
                    431: 	    '<div class="LC_edit_problem_header_title">'.
                    432: 	    &mt('Task Testing').
                    433: 	    '</div>';
                    434:     }
                    435:     
1.315     albertel  436:     my $show_all_foils_text = 
                    437: 	($Apache::lonhomework::parsing_a_task) ?
1.452     bisitz    438: 	&mt('Show All Instances')
                    439: 	: &mt('Show All Foils');
1.315     albertel  440: 
1.452     bisitz    441:     my $show_all= '<span class="LC_nobreak"><label for="showallfoils">'
                    442:                  .'<input type="checkbox" name="showallfoils"';
1.440     bisitz    443:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.452     bisitz    444:     $show_all.= ' /> '.$show_all_foils_text
                    445:                .'</label></span>';
1.406     albertel  446: 
                    447: 
1.384     albertel  448: 
1.406     albertel  449:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  450:     if (!$Apache::lonhomework::parsing_a_task) {
                    451: 	$result.="
1.406     albertel  452: <div class='LC_edit_problem_header_row1'>
                    453: <span class=\"LC_nobreak\">
1.405     albertel  454: ".&mt("Problem Status:")."
1.235     albertel  455: <select name='problemstate'>
1.270     albertel  456:   <option value=''></option>
1.235     albertel  457:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    458:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    459:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    460:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    461:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    462: </select>
1.406     albertel  463: </span>
                    464: <span class=\"LC_nobreak\">
1.405     albertel  465: ".&mt("Problem Type:")."
1.235     albertel  466: <select name='problemtype'>
1.270     albertel  467:   <option value=''></option>
1.242     albertel  468:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   469:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  470:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.465     raeburn   471:   ".&option('surveycred' ,'problemtype').&mt("Survey Question (with credit)")."</option>
                    472:   ".&option('anonsurvey' ,'problemtype').&mt("Anonymous Survey Question")."</option>
                    473:   ".&option('anonsurveycred' ,'problemtype').&mt("Anonymous Survey Question (with credit)")."</option>
1.428     raeburn   474:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.235     albertel  475: </select>
1.406     albertel  476: </span>
                    477: $show_all
                    478: </div>
                    479: <div class='LC_edit_problem_header_row2'>
                    480: <span class=\"LC_nobreak\">
1.405     albertel  481: ".&mt("Feedback Mode:")."
1.235     albertel  482: <select name='problemstatus'>
                    483:   <option value=''></option>
1.242     albertel  484:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  485:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    486:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  487: </select>
1.406     albertel  488: </span>
                    489: ";
                    490: 
1.376     albertel  491:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    492: 	$result.="
1.406     albertel  493: <div class='LC_edit_problem_header_row1'>
                    494: <span class=\"LC_nobreak\">
1.405     albertel  495: ".&mt("Problem Status:")."
1.376     albertel  496: <select name='problemstate'>
                    497:   <option value=''></option>
                    498:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    499:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    500:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    501:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    502: </select>
1.406     albertel  503: </span>
                    504: $show_all
                    505: ";
                    506:     }
                    507:     $result.='
                    508:        <span class="LC_nobreak">
                    509:        '.&mt('Apply style file: ').'
                    510:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    511:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    512:        </span>
1.422     www       513:      </div>
                    514:      <div class="LC_edit_problem_header_row1">'.
                    515:        &Apache::lonxml::renderingoptions().'
1.406     albertel  516:      </div>
                    517:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    518:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    519:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    520:    </div>
1.453     bisitz    521:    <hr />
1.406     albertel  522:    <div class="LC_edit_problem_header_randomize_row">
                    523:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    524:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
                    525:      <input type="text" name="rndseed" size="10" value="'.
                    526: 	       $rndseed.'"
                    527:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    528: 
                    529:     if (!$Apache::lonhomework::parsing_a_task) {
                    530: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    531: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  532: 	$result .= '<span class="LC_nobreak">'.
                    533: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   534: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    535:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    536:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  537: 		$numtoanalyze.'" size="5" />').
                    538: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    539: 		'</span>';
                    540: 						    
1.313     albertel  541:     }
1.406     albertel  542: 
                    543:     $result.='
                    544:    </div>
1.453     bisitz    545:    <hr />
1.447     bisitz    546:    <div>';
1.416     raeburn   547:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    548:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    549:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    550:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    551:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  552:     $result.='
                    553:    </div>
1.453     bisitz    554:    <hr />
1.409     albertel  555:    '.&Apache::lonxml::message_location().'
1.406     albertel  556: </div>';
1.159     albertel  557:     return $result;
1.48      albertel  558: }
                    559: 
1.65      albertel  560: sub initialize_storage {
1.357     albertel  561:     my ($given_symb) = @_;
1.353     albertel  562:     undef(%Apache::lonhomework::results);
                    563:     undef(%Apache::lonhomework::history);
1.357     albertel  564:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  565: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  566:     
                    567:     # anonymous users (CODEd exams) have no data
                    568:     if ($name eq 'anonymous' 
                    569: 	&& !defined($domain)) {
                    570: 	return;
                    571:     }
                    572: 
1.333     albertel  573:     if ($env{'request.state'} eq 'construct' 
                    574: 	|| $symb eq ''
                    575: 	|| $Apache::lonhomework::type eq 'practice') {
                    576: 	
                    577: 	my $namespace = $symb || $env{'request.uri'};
                    578: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  579: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    580: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  581: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    582: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    583: 	    &Apache::lonxml::debug("Attempt reset");
                    584: 	}
1.159     albertel  585: 	%Apache::lonhomework::history=
1.333     albertel  586: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  587: 	my ($temp)=keys %Apache::lonhomework::history ;
                    588: 	&Apache::lonxml::debug("Return message of $temp");
                    589:     } else {
                    590: 	%Apache::lonhomework::history=
                    591: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    592:     }
1.353     albertel  593: 
1.159     albertel  594:     #ignore error conditions
1.67      albertel  595:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  596:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  597: }
                    598: 
1.435     jms       599: =pod
                    600: 
                    601: =item finalize_storage()
                    602: 
                    603: 	Stores away the result has to a student's environment
                    604: 	checks form.grade_ for specific values, other wises stores
                    605: 	to the running users environment
                    606: 	Will increment totals for attempts, students, and corrects
                    607: 	if running user has student role.
                    608: 	
                    609: =cut
                    610: 
                    611: 
1.65      albertel  612: sub finalize_storage {
1.357     albertel  613:     my ($given_symb) = @_;
1.159     albertel  614:     my $result;
1.289     albertel  615:     if (%Apache::lonhomework::results) {
1.323     albertel  616: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    617: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  618: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  619: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  620: 	if ($env{'request.state'} eq 'construct' 
                    621: 	    || $symb eq ''
                    622: 	    || $Apache::lonhomework::type eq 'practice') {
                    623: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  624: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  625: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  626: 					      $namespace,'',$domain,$name);
1.159     albertel  627: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    628: 	} else {
                    629: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    630: 					    $symb,$courseid,$domain,$name);
                    631: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   632:             if ($env{'request.role'} =~/^st/) {
                    633:                 &store_aggregates($symb,$courseid);
                    634:             }
1.159     albertel  635: 	}
1.323     albertel  636:     } else {
                    637: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  638:     }
1.159     albertel  639:     return $result;
1.65      albertel  640: }
                    641: 
1.435     jms       642: =pod
                    643: 
                    644: item store_aggregates()
                    645: 
                    646: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                    647: 	for the course. Increments total number of attempts, unique students 
                    648: 	and corrects for each part for an instance of a problem, as appropriate.
                    649: 	
                    650: =cut
                    651: 
1.285     raeburn   652: sub store_aggregates {
                    653:     my ($symb,$courseid) = @_;
1.286     albertel  654:     my %aggregate;
                    655:     my @parts;
1.288     albertel  656:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    657:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  658:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  659:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  660:             push(@parts, $1);
1.285     raeburn   661:         }
                    662:     }
1.286     albertel  663:     foreach my $part (@parts) {
                    664:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    665: 	    eq 'APPROX_ANS' ||
                    666: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    667: 	    eq 'EXACT_ANS') {
1.287     albertel  668:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   669:         }
1.286     albertel  670:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  671:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   672:         } else {
1.293     albertel  673:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   674:             if ($last_reset) {
1.293     albertel  675:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   676:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    677:                 }
                    678:             }
1.285     raeburn   679:         }
1.287     albertel  680:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   681:     }
1.292     raeburn   682:     if (keys (%aggregate) > 0) {
1.289     albertel  683: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   684:                             $cdomain,$cname);
                    685:     }
                    686: }
1.289     albertel  687: 
1.65      albertel  688: sub checkout_msg {
1.211     albertel  689:     my %lt=&Apache::lonlocal::texthash( 
                    690: 		'resource'=>'The resource needs to be checked out',
                    691: 		'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.',
                    692:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    693:                 'checkout'=>'Check out Exam for Viewing',
                    694: 		'checkout?'=>'Check out Exam?');
1.352     albertel  695:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  696:     return (<<ENDCHECKOUT);
1.211     albertel  697: <h2>$lt{'resource'}</h2>
                    698:     <p>$lt{'id_expln'}</p>
1.449     bisitz    699: <p class="LC_warning">$lt{'warning'}</p>
1.444     bisitz    700: <form name="checkout" method="post" action="$uri">
1.91      albertel  701: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  702: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  703: </form>
                    704: ENDCHECKOUT
                    705: }
                    706: 
1.252     albertel  707: sub firstaccess_msg {
1.253     albertel  708:     my ($time,$symb)=@_;
1.414     albertel  709:     my $result;
                    710:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    711:     if ($interval[1] eq 'map') {
                    712: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                    713: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                    714:     
                    715: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.418     bisitz    716: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    717:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    718:                              ,$foldertitle,$time)."</h2>";
1.414     albertel  719:     } elsif ($interval[1] eq 'course') {
                    720: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.418     bisitz    721:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    722:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    723:                              ,$course,$time)."</h2>";
1.414     albertel  724:     } else {
                    725: 	my $title=&Apache::lonnet::gettitle($symb);
1.418     bisitz    726:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
                    727:                              .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                    728:                              ,$title,$time)."</h2>";
1.414     albertel  729:     }
1.352     albertel  730:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz    731:     my $buttontext = &mt('Show Resource');
                    732:     my $timertext = &mt('Start Timer?');
1.414     albertel  733:     $result .= (<<ENDCHECKOUT);
1.444     bisitz    734: <form name="markaccess" method="post" action="$uri">
1.252     albertel  735: <input type="hidden" name="markaccess" value="yes" />
1.418     bisitz    736: <input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel  737: </form>
                    738: ENDCHECKOUT
1.414     albertel  739:     return $result;
1.252     albertel  740: }
                    741: 
1.204     albertel  742: sub init_problem_globals {
                    743:     my ($type)=@_;
                    744:     #initialize globals
1.308     foxr      745:     #   For problems, we start out in part 0 (outside a <part> tag).
                    746:     #   and part 0 is used to describe the main body of the <problem>
                    747:     #
1.204     albertel  748:     if ($type eq 'problem') {
                    749: 	$Apache::inputtags::part='0';
                    750: 	@Apache::inputtags::partlist=('0');
1.405     albertel  751: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel  752: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      753: 
1.266     albertel  754:     } elsif ($type eq 'library') {
1.204     albertel  755: 	$Apache::inputtags::part='';
                    756: 	@Apache::inputtags::partlist=();
1.405     albertel  757: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel  758: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      759: 
1.304     albertel  760:     } elsif ($type eq 'Task') {
                    761: 	$Apache::inputtags::part='0';
                    762: 	@Apache::inputtags::partlist=('0');
1.405     albertel  763: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel  764: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  765:     }
                    766:     @Apache::inputtags::responselist = ();
                    767:     @Apache::inputtags::importlist = ();
                    768:     @Apache::inputtags::previous=();
                    769:     @Apache::inputtags::previous_version=();
                    770:     $Apache::structuretags::printanswer='No';
                    771:     @Apache::structuretags::whileconds=();
                    772:     @Apache::structuretags::whilebody=();
                    773:     @Apache::structuretags::whileline=();
                    774:     $Apache::lonhomework::scantronmode=0;
                    775:     undef($Apache::lonhomework::name);
1.358     albertel  776:     undef($Apache::lonhomework::default_type);
                    777:     undef($Apache::lonhomework::type);
1.204     albertel  778: }
                    779: 
                    780: sub reset_problem_globals {
                    781:     my ($type)=@_;
                    782:     undef(%Apache::lonhomework::history);
                    783:     undef(%Apache::lonhomework::results);
                    784:     undef($Apache::inputtags::part);
1.208     albertel  785: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    786: #detect if we try to do 2 problems in one file
                    787: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  788:     undef($Apache::lonhomework::name);
1.358     albertel  789:     undef($Apache::lonhomework::default_type);
                    790:     undef($Apache::lonhomework::type);
                    791:     undef($Apache::lonhomework::scantronmode);
                    792:     undef($Apache::lonhomework::ignore_response_errors);
1.405     albertel  793:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel  794: }
                    795: 
1.241     albertel  796: sub set_problem_state {
1.240     albertel  797:     my ($part)=@_;
1.284     albertel  798:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  799: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    800: 	    'correct_by_student';
                    801:     }
                    802: }
                    803: 
1.241     albertel  804: sub get_problem_status {
                    805:     my ($part)=@_;
1.267     albertel  806:     my $problem_status;
1.284     albertel  807:     if ($env{'request.state'} eq 'construct' &&
                    808: 	defined($env{'form.problemstatus'})) {
                    809: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  810:     } else {
                    811: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    812: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  813: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  814:     }
                    815:     return $problem_status;
                    816: }
                    817: 
1.9       albertel  818: sub start_problem {
1.326     albertel  819:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  820: 
1.311     foxr      821:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  822:     if (!$Apache::lonxml::metamode) {
                    823: 	&Apache::lonxml::startredirection();
                    824:     }
1.311     foxr      825: 
1.308     foxr      826:     # Problems don't nest and we don't allow more than one <problem> in
                    827:     # a .problem file.
                    828:     #
1.184     albertel  829:     if ( $Apache::inputtags::part ne '' ||
                    830: 	 $Apache::lonhomework::parsing_a_problem) {
                    831: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  832: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  833: 	return '';
                    834:     }
1.184     albertel  835: 
                    836:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  837:     &init_problem_globals('problem');
1.166     albertel  838: 
1.284     albertel  839:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  840: 	$Apache::lonhomework::scantronmode=1;
                    841:     }
1.161     albertel  842: 
1.159     albertel  843:     if ($target ne 'analyze') {
1.415     raeburn   844:         my $type = &Apache::lonnet::EXT('resource.0.type');
                    845: 	$Apache::lonhomework::type=$type;
1.284     albertel  846: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel  847: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel  848: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  849: 	}
1.332     albertel  850: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  851:     }
1.164     albertel  852:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  853: 	my $uri=$env{'request.uri'};
1.159     albertel  854: 	if ($uri=~/\.(\w+)$/) {
                    855: 	    $Apache::lonhomework::type=$1;
                    856: 	    &Apache::lonxml::debug("Using type of $1");
                    857: 	} else {
                    858: 	    $Apache::lonhomework::type='problem';
                    859: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    860: 	}
1.87      albertel  861:     }
1.301     albertel  862:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       863: 
1.363     albertel  864:     &initialize_storage();
1.389     albertel  865:     if ($target ne 'analyze'
                    866:        	&& $env{'request.state'} eq 'construct') {
                    867: 	&set_problem_state('0');
                    868:     }
                    869: 
1.366     albertel  870:     if ($target eq 'web') {
                    871: 	&Apache::lonxml::debug(" grading history ");
                    872: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    873:     }
1.363     albertel  874: 
1.159     albertel  875:     #added vars to the scripting enviroment
1.213     albertel  876:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  877:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  878:     &Apache::run::run($expression,$safeeval);
1.159     albertel  879:     my $status;
                    880:     my $accessmsg;
                    881: 
1.343     albertel  882:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  883:     my ($result,$form_tag_start);
1.354     albertel  884:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    885: 	|| $target eq 'edit') {
1.350     albertel  886: 	($result,$form_tag_start) =
                    887: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    888: 			$name);
                    889:     }
                    890: 
1.284     albertel  891:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  892: 
                    893:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    894:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    895: 	$target eq 'tex') {
1.284     albertel  896: 	if ($env{'form.markaccess'}) {
1.414     albertel  897: 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    898: 	    &Apache::lonnet::set_first_access($interval[1]);
1.252     albertel  899: 	}
1.159     albertel  900: 	#handle rand seed in construction space
                    901: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  902: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  903: 	if ($env{'request.state'} ne "construct" && 
                    904: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  905: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
1.462     raeburn   906: 		$rndseed.'" />'.
                    907: 		    '<input type="submit" name="resetdata"
                    908:                              value="'.&mt('New Problem Variation').'" />';
1.334     albertel  909: 	    if (exists($env{'form.username'})) {
                    910: 		$form_tag_start.=
1.164     albertel  911: 		    '<input type="hidden" name="username"
1.284     albertel  912:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  913: 	    }
1.462     raeburn   914: 	    if ($env{'request.role.adv'}) {
                    915: 		$form_tag_start.= ' <label class="LC_nobreak">'
                    916:                          .'<input type="checkbox" name="showallfoils"';
                    917: 		if (defined($env{'form.showallfoils'})) {
                    918: 		    $form_tag_start.=' checked="checked"';
                    919: 		}
                    920:                 $form_tag_start.= ' /> '
                    921:                                  .&mt('Show All Foils')
                    922:                                  .'</label>';
                    923: 	    }
1.417     www       924:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn   925:                 $form_tag_start.=&practice_problem_header();
1.417     www       926:             }
1.462     raeburn   927: 	    $form_tag_start.='<hr />';
1.162     albertel  928: 	}
1.324     albertel  929: 
                    930: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    931: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  932: 	push (@Apache::inputtags::status,$status);
1.324     albertel  933: 
1.159     albertel  934: 	my $expression='$external::datestatus="'.$status.'";';
                    935: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    936: 	&Apache::run::run($expression,$safeeval);
                    937: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  938: 
1.159     albertel  939: 	if (( $status eq 'CLOSED' ) ||
                    940: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  941: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  942: 	    ( $status eq 'BANNED') ||
1.216     albertel  943: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  944: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  945: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  946: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    947: 						       $style);
1.159     albertel  948: 	    if ( $target eq "web" ) {
1.343     albertel  949: 		my $msg;
1.159     albertel  950: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  951: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.441     raeburn   952:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                    953:                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
1.253     albertel  954: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  955: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  956: 		}
1.216     albertel  957: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       958: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  959: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  960: 		    $msg.=&checkout_msg();
1.252     albertel  961: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  962: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  963: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn   964: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.159     albertel  965: 		}
                    966: 		$result.=$msg.'<br />';
                    967: 	    } elsif ($target eq 'tex') {
1.332     albertel  968: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    969: 		                    : '\begin{minipage}{\textwidth}';
1.443     foxr      970: 		$result.='\noindent \vskip 1 mm '.
1.332     albertel  971: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  972: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  973: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  974: 		} else {
1.211     albertel  975: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  976: 		}
                    977: 	    }
1.324     albertel  978: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  979: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    980: 						       $style);
1.324     albertel  981: 	    if ($target eq 'web') {
1.375     albertel  982: 		$result .= 
                    983: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  984: 	    } elsif ($target eq 'grade') {
                    985: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    986: 							'problem');
                    987: 	    }
1.159     albertel  988: 	} elsif ($target eq 'web') {
1.360     albertel  989: 	    if ($status eq 'CAN_ANSWER' 
                    990: 		&& $slot_name ne ''
                    991: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    992: 		# unproctored slot access, self checkin
                    993: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    994: 					      $slot_name);
                    995: 	    }
1.368     albertel  996: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  997: 	      '<input type="hidden" name="submitted" value="yes" />';
                    998: 	    # create a page header and exit
1.284     albertel  999: 	    if ($env{'request.state'} eq "construct") {
                   1000: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn  1001:                 if ($Apache::lonhomework::type eq 'practice') {
                   1002:                     $result.= '<input type="submit" name="resetdata" '.
                   1003:                               'value="'.&mt('New Problem Variation').'" />'.
                   1004:                               &practice_problem_header().'<hr />';
                   1005:                 }
1.227     albertel 1006: 	    }
                   1007: 	    # if we are viewing someone else preserve that info
1.284     albertel 1008: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel 1009: 		foreach my $field ('symb','courseid','domain','username') {
                   1010: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1011: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1012: 		}
                   1013: 	    }
                   1014: 	} elsif ($target eq 'tex') {
1.319     foxr     1015: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                   1016: 
1.99      sakharuk 1017: 	}
1.159     albertel 1018:     } elsif ($target eq 'edit') {
1.343     albertel 1019: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1020: 	$Apache::lonxml::warnings_error_header=
                   1021: 	    &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 1022: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1023: 	$result.=$temp;
                   1024:     } elsif ($target eq 'modified') {
                   1025: 	$result=$token->[4];
                   1026:     } else {
                   1027: 	# page_start returned a starting result, delete it if we don't need it
                   1028: 	$result = '';
1.99      sakharuk 1029:     }
1.159     albertel 1030:     return $result;
1.9       albertel 1031: }
                   1032: 
                   1033: sub end_problem {
1.159     albertel 1034:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1035:     my $result;
1.310     foxr     1036: 
1.321     albertel 1037:     if (!$Apache::lonxml::metamode) {
                   1038: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1039: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1040:     }
1.319     foxr     1041: 
                   1042:     if ($target eq 'tex') {
1.321     albertel 1043: 	# Figure out the front matter and replace the
                   1044: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1045: 	# this in end_problem because whether or not we display due
                   1046: 	# dates depends on whether due dates have already been
                   1047: 	# displayed in the problem parts.
                   1048: 
1.319     foxr     1049: 	my $frontmatter   = '';
                   1050: 	my $startminipage = '';
                   1051: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1052: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1053: 	}
                   1054: 	my $id = $Apache::inputtags::part;
                   1055: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1056: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1057: 	my @packages = split /,/,$packages;
                   1058: 	my $allow_print_points = 0;
                   1059: 	foreach my $partial_key (@packages) {
                   1060: 	    if ($partial_key=~m/^part_0$/) {
                   1061: 		$allow_print_points=1;
                   1062: 	    }
                   1063: 	}
                   1064: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1065: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1066: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1067: 			'.disableexampointprint'}) eq 'yes') {
                   1068: 	    $allow_print_points=0;
                   1069: 	}
                   1070: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.443     foxr     1071: 	my $begin_doc=' \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
1.319     foxr     1072: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1073: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1074: 	
                   1075: 	#  Figure out what the due date is and if we need to print
                   1076: 	#  it in the problem header.  We have been logging the
                   1077: 	#  last due date written to file. 
                   1078: 	
                   1079: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                   1080: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
1.448     bisitz   1081:         my $duedate_text = &mt('Due date: [_1]'
                   1082:                               ,&Apache::lonlocal::locallocaltime($duetime));
1.319     foxr     1083: 	my $temp_file;
                   1084: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1085: 	
                   1086: 	# Figure out what the last printed due date is or set it
                   1087: 	# to the epoch if no duedates have been printed.
                   1088: 	
                   1089: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1090: 	if (-e $filename) {
                   1091: 	    $temp_file = Apache::File->new($filename);
                   1092: 	    my @due_file      = <$temp_file>;
                   1093: 	    $due_file_content = $due_file[$#due_file];
                   1094: 	    chomp $due_file_content;
                   1095: 	} 
                   1096: 	
                   1097: 	# We display the due date iff it is not the same as the last
                   1098: 	# duedate in problem header ($due_file_content), and
                   1099: 	# none of our parts displayed a duedate.
                   1100: 	#
                   1101: 	my $parts_with_displayduedate;
                   1102: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1103: 	    $parts_with_displayduedate = 
                   1104: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1105: 	} else {
                   1106: 	    $parts_with_displayduedate = 0;
                   1107: 	}
                   1108: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1109: 	    $temp_file = Apache::File->new('>'.$filename);
                   1110: 	    print $temp_file "$duetime\n";
                   1111: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1112: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1113: 		    $frontmatter .= $begin_doc.
1.448     bisitz   1114: 			'\textit{'.$duedate_text.'} '.$toc_line;
1.319     foxr     1115: 		} else {
                   1116: 		    $frontmatter.= $begin_doc.$toc_line;
1.463     foxr     1117: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { 
                   1118: 			$frontmatter .= '\fbox{\textit{'.$weight.' pt}}';
                   1119: 		    }
1.319     foxr     1120: 		}
                   1121: 	    } else {
1.448     bisitz   1122: 		$frontmatter .= '\vskip 1mm\textit{'.$duedate_text.'} \\\\\\\\'.$startminipage;
1.319     foxr     1123: 	    }
                   1124: 	} else {
                   1125: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1126: 		$frontmatter .= $begin_doc.$toc_line;
1.463     foxr     1127: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { 
                   1128: 		    $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';
                   1129: 		}
1.319     foxr     1130: 	    } else {
1.381     albertel 1131: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1132: 	    }
                   1133: 	}
                   1134: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1135:     }
                   1136: 
1.159     albertel 1137:     my $status=$Apache::inputtags::status['-1'];
                   1138:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1139: 	$target eq 'tex') {
1.249     albertel 1140: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1141: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1142: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1143: 		&Apache::inputtags::grade;
1.324     albertel 1144: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1145: 		# no need to grade, and don't want to hide data
1.249     albertel 1146: 	    } else {
                   1147: 		# move any submission data to .hidden
                   1148: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1149: 	    }
1.159     albertel 1150: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1151: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1152: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1153: 	    # if part is zero, no <part>s existed, so we need show the current
                   1154: 	    # grading status
                   1155: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1156: 	    $result.= $gradestatus;
                   1157: 	}
                   1158: 	if (
1.284     albertel 1159: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1160: 	    ($target eq 'answer') || ($target eq 'tex')
                   1161: 	   ) {
1.227     albertel 1162: 	    if ($target ne 'tex' &&
1.284     albertel 1163: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1164: 		$result.="</form>";
1.348     albertel 1165: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel 1166: 	    }
                   1167: 	    if ($target eq 'web') {
1.346     albertel 1168: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1169: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1170: 		my $endminipage = '';
1.284     albertel 1171: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1172: 		    $endminipage = '\end{minipage}';
                   1173: 		}
1.284     albertel 1174:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1175: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1176: 		} else {
1.262     sakharuk 1177: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1178: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1179: 			$result .= $endminipage.'\end{document} ';
                   1180: 		    } else {
1.382     albertel 1181: 			$result .= $endminipage;
1.262     sakharuk 1182: 		    }
1.159     albertel 1183: 		}
                   1184: 	    }
                   1185: 	}
                   1186: 	if ($target eq 'grade') {
                   1187: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1188: 	    &finalize_storage();
                   1189: 	}
1.284     albertel 1190: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1191: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1192: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1193: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1194: 	                        # we always show answer mode too.
1.159     albertel 1195: 	}
                   1196:     } elsif ($target eq 'meta') {
                   1197: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1198: 	    @Apache::inputtags::response=();
1.159     albertel 1199: 	    $result=&Apache::response::mandatory_part_meta;
                   1200: 	}
1.215     albertel 1201: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1202: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1203:     } elsif ($target eq 'edit') {
                   1204: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1205: 	$result .= &problem_edit_footer();
1.320     albertel 1206:     } elsif ($target eq 'modified') {
                   1207: 	 $result .= $token->[2];
1.159     albertel 1208:     }
1.155     albertel 1209: 
1.284     albertel 1210:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1211: 	&Apache::inputtags::check_for_duplicate_ids();
                   1212:     }
1.204     albertel 1213: 
                   1214:     &reset_problem_globals('problem');
1.159     albertel 1215: 
                   1216:     return $result;
1.48      albertel 1217: }
                   1218: 
1.108     albertel 1219: 
1.48      albertel 1220: sub start_library {
1.159     albertel 1221:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1222:     my ($result,$form_tag_start);
1.371     albertel 1223:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1224: 	&init_problem_globals('library');
                   1225: 	$Apache::lonhomework::type='problem';
                   1226:     }
1.159     albertel 1227:     if ($target eq 'edit') {
1.343     albertel 1228: 	($result,$form_tag_start)=
                   1229: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1230: 			'Edit');
                   1231: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1232: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1233: 	$result.=$temp;
                   1234:     } elsif ($target eq 'modified') {
                   1235: 	$result=$token->[4];
1.340     albertel 1236:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1237: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1238: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1239: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1240: 	($result,$form_tag_start)=
                   1241: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1242: 			$name);
1.159     albertel 1243: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1244: 	$result.=" \n $form_tag_start".	
1.159     albertel 1245: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1246: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1247:         if ($Apache::lonhomework::type eq 'practice') {
                   1248:             $result.= '<input type="submit" name="resetdata" '.
                   1249:                       'value="'.&mt('New Problem Variation').'" />'.
                   1250:                       &practice_problem_header().'<hr />';
                   1251:         }
1.159     albertel 1252:     }
                   1253:     return $result;
1.48      albertel 1254: }
                   1255: 
                   1256: sub end_library {
1.159     albertel 1257:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1258:     my $result='';
                   1259:     if ($target eq 'edit') {
                   1260: 	$result=&problem_edit_footer();
1.371     albertel 1261:     } elsif ($target eq 'web' 
                   1262: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1263: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1264: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1265:     }
1.371     albertel 1266:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1267: 	&reset_problem_globals('library');
                   1268:     }
1.159     albertel 1269:     return $result;
1.197     www      1270: }
                   1271: 
                   1272: sub start_definetag {
1.326     albertel 1273:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1274: 
                   1275:     my $result;
                   1276: 
                   1277:     my $name = $token->[2]->{'name'};
1.326     albertel 1278:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1279:     if ($target eq 'web') {
                   1280: 	if ($name=~/^\//) {
                   1281: 	    $result=
                   1282: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1283: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1284: 	} else {
                   1285: 	    $result=
                   1286: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1287: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1288: 	}
                   1289: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1290: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1291:     }
                   1292:     return $result;
                   1293: }
                   1294: 
                   1295: sub end_definetag {
                   1296:     return '';
1.1       albertel 1297: }
                   1298: 
                   1299: sub start_block {
1.201     albertel 1300:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1301: 
                   1302:     my $result;
1.1       albertel 1303: 
1.339     albertel 1304:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1305: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1306: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1307: 	if (defined($code) && $code ne '') {
1.137     albertel 1308: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1309: 		&Apache::lonxml::default_homework_load($safeeval);
                   1310: 	    }
1.131     albertel 1311: 	    $result = &Apache::run::run($code,$safeeval);
                   1312: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1313: 	} else {
                   1314: 	    $result='1';
                   1315: 	}
                   1316: 	if ( ! $result ) {
1.201     albertel 1317: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1318: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1319: 	}
                   1320: 	$result='';
                   1321:     } elsif ($target eq 'edit') {
                   1322: 	$result .=&Apache::edit::tag_start($target,$token);
                   1323: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1324: 					  $token,40);
                   1325: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1326:     } elsif ($target eq 'modified') {
                   1327: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1328: 						     $safeeval,'condition');
                   1329: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1330:     }
1.131     albertel 1331:     return $result;
1.1       albertel 1332: }
                   1333: 
                   1334: sub end_block {
1.167     www      1335:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1336:     my $result;
                   1337:     if ($target eq "edit") {
                   1338: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1339:     }
                   1340:     return $result;
                   1341: }
                   1342: 
                   1343: sub start_languageblock {
1.201     albertel 1344:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1345: 
                   1346:     my $result;
                   1347: 
1.339     albertel 1348:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1349: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1350: 	my $include = $token->[2]->{'include'};
                   1351: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1352:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.394     www      1353: # This should not even happen, since we should at least have the server language
1.398     www      1354:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1355: # Now loop over all languages in order of preference
                   1356:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1357: # If the languageblock has no arguments, show the contents
1.399     www      1358:            $result=1;
                   1359:            my $found=0;
1.394     www      1360: # Do we have an include argument?
1.398     www      1361: 	   if ($include) {
1.394     www      1362: # If include is specified, by default, don't render the block
1.399     www      1363:               $result=0;
1.398     www      1364:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1365: # ... but if my preferred language is included, render it
1.398     www      1366:                  if ($included_language eq $preferred_language) {
1.399     www      1367:                     $result=1; 
                   1368:                     $found=1; 
1.398     www      1369:                  }
                   1370:               }
                   1371: 	   }
1.394     www      1372: # Do we have an exclude argument?
1.398     www      1373:            if ($exclude) {
1.399     www      1374:               $result=1;
1.398     www      1375:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1376:                  if ($excluded_language eq $preferred_language) {
1.399     www      1377:                     $result=0;
                   1378:                     $found=1;
1.398     www      1379:                  }
                   1380:               }
                   1381: 	   }
1.399     www      1382:            if ($found) { last; }
1.398     www      1383:         }
1.201     albertel 1384: 	if ( ! $result ) {
                   1385: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1386: 						   $style);
                   1387: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1388: 	}
                   1389: 	$result='';
1.167     www      1390:     } elsif ($target eq 'edit') {
                   1391: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1392: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1393: 					  $token,40);
1.211     albertel 1394: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1395: 					  $token,40);
                   1396: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1397:     } elsif ($target eq 'modified') {
                   1398: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1399: 						     $safeeval,'include',
                   1400: 						     'exclude');
1.167     www      1401: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1402:     }
                   1403:     return $result;
                   1404: }
                   1405: 
                   1406: sub end_languageblock {
1.170     www      1407:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1408:     my $result;
1.201     albertel 1409:     if ($target eq "edit") {
1.170     www      1410: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1411:     }
                   1412:     return $result;
                   1413: }
                   1414: 
1.397     albertel 1415: {
                   1416:     my %available_texts;
                   1417:     sub start_translated {
                   1418: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1419: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1420: 	undef(%available_texts);
                   1421:     }
                   1422:     
                   1423:     sub end_translated {
                   1424: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1425: 	my $result;
                   1426: 	#show the translation on viewable targets
                   1427: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1428: 	    # or non-viewable targets, if it's embedded in something that
                   1429: 	    # wants the output
                   1430: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1431: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1432: 	    my @possibilities = keys(%available_texts);
                   1433: 	    my $which = 
                   1434: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1435: 	    $result = $available_texts{$which};
                   1436: 	}
                   1437: 	undef(%available_texts);
                   1438: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1439: 	return $result;
                   1440:     }
                   1441: 
                   1442: 
                   1443:     sub start_lang {
                   1444: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1445: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1446: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1447: 	    &Apache::lonxml::startredirection();
                   1448: 	}
                   1449: 	return '';
                   1450:     }
                   1451: 
                   1452:     sub end_lang {
                   1453: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1454: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1455: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1456: 	    my $result = &Apache::lonxml::endredirection();
                   1457: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1458: 						   $safeeval);
1.431     raeburn  1459:             if ($which=~/\w/) {
                   1460:                 $available_texts{$which} = $result;
                   1461:             }
                   1462:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1463:                                                         $safeeval);
                   1464:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1465:                 if ($language=~/\w/) {
                   1466:                     $available_texts{$language} = $result;
                   1467:                 }
1.427     bisitz   1468:             }
                   1469: 
1.397     albertel 1470: 	}
                   1471: 	return '';
                   1472:     }
                   1473: }
                   1474: 
1.170     www      1475: sub start_instructorcomment {
1.201     albertel 1476:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1477: 
                   1478:     my $result;
                   1479: 
1.339     albertel 1480:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1481: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1482:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1483: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1484: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1485: 						   $parser,$style);
1.170     www      1486: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1487: 	}
                   1488: 	$result='';
                   1489:     } elsif ($target eq 'edit') {
                   1490: 	$result .=&Apache::edit::tag_start($target,$token);
                   1491: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1492:     }
                   1493:     return $result;
                   1494: }
                   1495: 
                   1496: sub end_instructorcomment {
1.159     albertel 1497:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1498:     my $result;
                   1499:     if ($target eq "edit") {
                   1500: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1501:     }
                   1502:     return $result;
1.4       tsai     1503: }
                   1504: 
                   1505: sub start_while {
1.326     albertel 1506:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1507: 
1.160     albertel 1508:     my $result;
1.339     albertel 1509:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1510: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1511: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1512: 
1.160     albertel 1513: 	push( @Apache::structuretags::whileconds, $code);
                   1514: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1515: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1516: 	}
                   1517: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1518: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1519: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1520: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1521: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1522: 	if ( $result ) {
                   1523: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1524: 	}
                   1525:     } elsif ($target eq 'edit') {
                   1526: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1527: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1528: 					  $token,40);
                   1529: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1530:     } elsif ($target eq 'modified') {
                   1531: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1532: 						     $safeeval,'condition');
                   1533: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1534:     }
1.160     albertel 1535:     return $result;
1.4       tsai     1536: }
                   1537: 
                   1538: sub end_while {
1.159     albertel 1539:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1540:     my $result;
                   1541: 
1.339     albertel 1542:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1543: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1544: 	my $code = pop(@Apache::structuretags::whileconds);
                   1545: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1546: 	my $line = pop(@Apache::structuretags::whileline);
                   1547: 	my $return = &Apache::run::run($code,$safeeval);
                   1548: 	my $starttime=time;
                   1549: 	my $error=0;
                   1550: 	while ($return) {
                   1551: 	    if (time-$starttime >
                   1552: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1553: 		$return = 0; $error=1; next;
1.161     albertel 1554: 	    }
                   1555: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1556: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1557: 		$target eq 'analyze') {
                   1558: 		# grade/answer/analyze should produce no output but if we
                   1559: 		# are redirecting, the redirecter should know what to do
                   1560: 		# with the output
                   1561: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1562: 	    }
1.161     albertel 1563: 	    $return = &Apache::run::run($code,$safeeval);
                   1564: 	}
                   1565: 	if ($error) {
1.430     bisitz   1566: 	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occurred while running &lt;while&gt; on line').' '.$line.'</pre>');
1.160     albertel 1567: 	}
                   1568:     } elsif ($target eq "edit") {
                   1569: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1570:     }
1.160     albertel 1571:     return $result;
1.1       albertel 1572: }
1.6       tsai     1573: 
1.160     albertel 1574: # <randomlist show="1">
1.6       tsai     1575: #  <tag1>..</tag1>
                   1576: #  <tag2>..</tag2>
                   1577: #  <tag3>..</tag3>
1.160     albertel 1578: #  ...
1.6       tsai     1579: # </randomlist>
                   1580: sub start_randomlist {
1.326     albertel 1581:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1582:     my $result;
1.339     albertel 1583:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1584: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1585: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1586: 	my $b_parser= HTML::LCParser->new(\$body);
                   1587: 	$b_parser->xml_mode(1);
                   1588: 	$b_parser->marked_sections(1);
1.159     albertel 1589: 	my $b_tok;
                   1590: 	my @randomlist;
                   1591: 	my $list_item;
                   1592: 	while($b_tok = $b_parser->get_token() ) {
                   1593: 	    if($b_tok->[0] eq 'S') { # start tag
                   1594: 		# get content of the tag until matching end tag
                   1595: 		# get all text upto the matching tag
                   1596: 		# and push the content into @randomlist
                   1597: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1598: 							   $b_parser);
                   1599: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1600: 		push(@randomlist,$list_item);
                   1601: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1602:                 #         $list_item</b>";
                   1603: 	    }
                   1604: 	    if($b_tok->[0] eq 'T') { # text
                   1605: 		# what to do with text in between tags?
                   1606: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1607: 	    }
                   1608: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1609: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1610: 	    # }
                   1611: 	}
1.303     albertel 1612: 	if (@randomlist) {
                   1613: 	    my @idx_arr = (0 .. $#randomlist);
                   1614: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1615: 	    my $bodytext = '';
                   1616: 	    my $show=$#randomlist;
                   1617: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1618: 	    $showarg--;
                   1619: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  1620:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   1621:                 my @currlist;
                   1622:                 my $part = $Apache::inputtags::part;
                   1623:                 if ($part ne '') {
                   1624:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   1625:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   1626:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   1627:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1628:                         }
                   1629:                     } else {
                   1630:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1631:                     }
                   1632:                 }
                   1633:             }
1.303     albertel 1634: 	    for(0 .. $show) {
                   1635: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1636: 	    }
                   1637: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1638: 	}
                   1639:     } elsif ($target eq 'edit' ) {
                   1640: 	$result .=&Apache::edit::tag_start($target,$token);
                   1641: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1642: 					   $token,5);
                   1643: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1644:     } elsif ($target eq 'modified' ) {
                   1645: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1646: 						     $safeeval,'show');
                   1647: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1648:     }
                   1649:     return $result;
1.7       tsai     1650: }
                   1651: 
                   1652: sub shuffle {
                   1653:     my $a=shift;
                   1654:     my $i;
1.303     albertel 1655:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1656: 	&Apache::response::pushrandomnumber();
1.159     albertel 1657: 	for($i=@$a;--$i;) {
                   1658: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1659: 	    next if $i == $j;
                   1660: 	    @$a[$i,$j] = @$a[$j,$i];
                   1661: 	}
1.251     albertel 1662: 	&Apache::response::poprandomnumber();
1.7       tsai     1663:     }
1.6       tsai     1664: }
                   1665: 
                   1666: sub end_randomlist {
1.159     albertel 1667:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1668:     my $result;
                   1669:     if ($target eq 'edit' ) {
                   1670: 	$result=&Apache::edit::tag_end($target,$token,
                   1671: 				       'End Randomly Parsed Block');
                   1672:     }
                   1673:     return $result;
1.6       tsai     1674: }
                   1675: 
1.283     albertel 1676: sub ordered_show_check {
                   1677:     my $last_part=$Apache::inputtags::partlist[-2];
                   1678:     my $in_order=
                   1679: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1680:     my $in_order_show=1;
                   1681:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1682: 	$in_order_show=&Apache::response::check_status($last_part);
                   1683:     }
                   1684:     return $in_order_show;
                   1685: }
                   1686: 
1.11      albertel 1687: sub start_part {
1.326     albertel 1688:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1689:     if (!$Apache::lonxml::metamode) {
                   1690: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1691: 	                                     # duedates.
                   1692:     }
1.159     albertel 1693:     my $result='';
1.386     albertel 1694:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1695:     $Apache::inputtags::part=$id;
1.177     albertel 1696:     push(@Apache::inputtags::partlist,$id);
                   1697:     @Apache::inputtags::response=();
1.159     albertel 1698:     @Apache::inputtags::previous=();
                   1699:     @Apache::inputtags::previous_version=();
1.405     albertel 1700:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1701:     &Apache::response::reset_params();
                   1702: 
1.159     albertel 1703:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1704:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1705:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1706:     my $in_order_show=&ordered_show_check();
1.214     albertel 1707:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1708:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1709:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1710: 
                   1711:     if ($target eq 'meta') {
1.224     www      1712: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1713: 	return &Apache::response::mandatory_part_meta.
                   1714: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1715:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1716: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1717: 	if ($hidden || !$in_order_show) {
1.326     albertel 1718: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1719: 	} else {
                   1720: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1721: 	    push (@Apache::inputtags::status,$status);
                   1722: 	    my $expression='$external::datestatus="'.$status.'";';
                   1723: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1724: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1725: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1726: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1727: 	    }
1.216     albertel 1728: 	    if (( $status eq 'CLOSED' ) ||
                   1729: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1730: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1731: 		( $status eq 'BANNED') ||
                   1732: 		( $status eq 'UNAVAILABLE') ||
                   1733: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1734: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1735: 							   $style);
1.159     albertel 1736: 		if ( $target eq "web" ) {
1.211     albertel 1737: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1738: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1739: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1740: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1741: 		    } else {
1.211     albertel 1742: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1743: 		    }
1.159     albertel 1744: 		}
                   1745: 	    } else {
                   1746: 		if ($target eq 'tex') {
1.284     albertel 1747: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1748: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1749: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1750: 			} else {
                   1751: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1752: 			}
1.195     sakharuk 1753: 		    }
1.159     albertel 1754: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1755: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1756: 		    my @allkeys = split /,/,$allkeys;
                   1757: 		    my $allow_print_points = 0;
                   1758: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1759: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1760: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1761: 			}
                   1762: 		    }
1.275     albertel 1763: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1764: 		    if (defined($maxtries) && $maxtries < 0) {
                   1765: 			$allow_print_points=0;
                   1766: 		    }
1.302     albertel 1767: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1768: 				    '.disableexampointprint'}) eq 'yes') {
                   1769: 			$allow_print_points=0;
                   1770: 		    }
1.463     foxr     1771: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { 
                   1772: 			$result .= '\vskip 10mm\fbox{\textit{'.$weight.' pt}}';
                   1773: 
                   1774: 		    }
1.233     www      1775: 		} elsif ($target eq 'web') {
1.356     www      1776: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1777: 		}
                   1778: 	    }
                   1779: 	}
                   1780:     } elsif ($target eq 'edit') {
                   1781: 	$result.=&Apache::edit::tag_start($target,$token);
                   1782: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1783: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1784: 	    '&nbsp;&nbsp;'.
                   1785: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1786: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1787:     } elsif ($target eq 'modified') {
                   1788: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1789: 						     $safeeval,'id','display');
1.159     albertel 1790: 	if ($constructtag) {
1.225     albertel 1791: 	    #limiting ids to only letters numbers, and space
1.224     www      1792: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1793: 	    $result = &Apache::edit::rebuild_tag($token);
                   1794: 	}
                   1795:     }
                   1796:     return $result;
1.11      albertel 1797: }
                   1798: 
                   1799: sub end_part {
1.159     albertel 1800:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1801:     &Apache::lonxml::debug("in end_part $target ");
                   1802:     my $status=$Apache::inputtags::status['-1'];
                   1803:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1804:     my $in_order_show=&ordered_show_check();
1.321     albertel 1805:     my $result;
                   1806:     if (!$Apache::lonxml::metamode) {
                   1807: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1808: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1809:     }
1.312     albertel 1810:     if ($target eq 'grade') {
1.249     albertel 1811: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1812: 	    !$hidden && $in_order_show) {
1.311     foxr     1813: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1814: 	} else {
                   1815: 	    # move any submission data to .hidden
                   1816: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1817: 	}
1.283     albertel 1818:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1819: 	     !$hidden && $in_order_show) {
1.159     albertel 1820: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1821: 							$target);
1.212     albertel 1822: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1823: 	    $gradestatus='';
                   1824: 	}
1.311     foxr     1825: 	$result.=$gradestatus;
1.265     sakharuk 1826: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1827:     } elsif ($target eq 'edit') {
1.311     foxr     1828: 	$result.=&Apache::edit::end_table();
1.322     albertel 1829:     } elsif ($target eq 'modified') {
                   1830: 	 $result .= $token->[2];
1.159     albertel 1831:     }
                   1832:     pop @Apache::inputtags::status;
                   1833:     $Apache::inputtags::part='';
1.295     albertel 1834:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1835:     return $result;
1.11      albertel 1836: }
1.1       albertel 1837: 
1.25      albertel 1838: sub start_preduedate {
1.326     albertel 1839:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1840:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1841: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1842: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1843: 	if (!$Apache::lonhomework::scantronmode &&
                   1844: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1845: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1846: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1847: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1848: 	}
1.24      albertel 1849:     }
1.159     albertel 1850:     return '';
1.24      albertel 1851: }
                   1852: 
1.25      albertel 1853: sub end_preduedate {
1.159     albertel 1854:     return '';
1.24      albertel 1855: }
                   1856: 
1.369     foxr     1857: # In all the modes where <postanswerdate> text is 
                   1858: # displayable,  all we do is eat up the text between the start/stop
                   1859: # tags if the conditions are not right to display it.
1.25      albertel 1860: sub start_postanswerdate {
1.326     albertel 1861:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1862:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1863: 	&Apache::lonnet::allowed('pav',
                   1864: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1865:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1866: 	$target eq 'tex' ) {
1.300     albertel 1867: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1868: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1869: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1870: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1871: 	}
                   1872:     }
                   1873:     return '';
1.24      albertel 1874: }
                   1875: 
1.25      albertel 1876: sub end_postanswerdate {
1.159     albertel 1877:     return '';
1.24      albertel 1878: }
                   1879: 
1.25      albertel 1880: sub start_notsolved {
1.326     albertel 1881:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1882:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1883: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1884: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1885: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1886: 	if ($gradestatus =~ /^correct/ &&
                   1887: 	    &Apache::response::show_answer()) {
1.159     albertel 1888: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1889: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1890: 	}
1.24      albertel 1891:     }
1.159     albertel 1892:     return '';
1.24      albertel 1893: }
                   1894: 
1.25      albertel 1895: sub end_notsolved {
1.159     albertel 1896:     return '';
1.24      albertel 1897: }
                   1898: 
                   1899: sub start_solved {
1.326     albertel 1900:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1901:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1902: 	$target eq 'tex') {
                   1903: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1904: 	if ($gradestatus !~ /^correct/ ||
                   1905: 	    !&Apache::response::show_answer()) {
1.326     albertel 1906: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1907: 	}
1.24      albertel 1908:     }
1.159     albertel 1909:     return '';
1.24      albertel 1910: }
                   1911: 
                   1912: sub end_solved {
1.248     albertel 1913:     return '';
                   1914: }
                   1915: 
                   1916: sub start_problemtype {
1.326     albertel 1917:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1918:     my $result;
1.339     albertel 1919:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1920: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1921: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1922: 	if (!defined($mode)) { $mode='show'; }
                   1923: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1924: 	my $found=0;
                   1925: 	foreach my $type (split(',',$for)) {
                   1926: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1927: 	}
                   1928: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1929: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1930: 	}
                   1931: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1932: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1933: 	}
                   1934:     } elsif ($target eq 'edit') {
                   1935: 	$result .=&Apache::edit::tag_start($target,$token);
                   1936: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1937: 					   [['show','Show'],
                   1938: 					    ['hide','Hide']]
                   1939: 					   ,$token);
                   1940: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1941: 					     [ ['exam','Exam/Quiz Problem'],
                   1942: 					       ['survey','Survey'],
1.465     raeburn  1943:                                                ['surveycred','Survey (with credit)'],
                   1944:                                                ['anonsurvey','Anonymous Survey'],
                   1945:                                                ['anonsurveycred','Anonymous Survey (with credit)'],
1.428     raeburn  1946: 					       ['problem','Homework Problem'],
                   1947:                                                ['practice','Practice Problem'] ]
1.248     albertel 1948: 					     ,$token);
                   1949: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1950:     } elsif ($target eq 'modified') {
                   1951: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1952: 						     $safeeval,'mode','for');
                   1953: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1954:     }
                   1955:     return $result;
                   1956: }
                   1957: 
                   1958: sub end_problemtype {
1.159     albertel 1959:     return '';
1.24      albertel 1960: }
1.34      albertel 1961: 
                   1962: sub start_startouttext {
1.159     albertel 1963:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1964:     my @result=(''.'');
                   1965:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 1966:     
                   1967:     my $nesting = 
                   1968: 	&Apache::lonxml::set_state('outtext',
                   1969: 				   &Apache::lonxml::get_state('outtext')+1);
                   1970:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   1971: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   1972:     }
1.159     albertel 1973:     return (@result);
1.34      albertel 1974: }
1.159     albertel 1975: 
1.34      albertel 1976: sub end_startouttext {
1.326     albertel 1977:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1978:     my $result='';
                   1979:     my $text='';
                   1980:     if ($target eq 'edit') {
1.424     foxr     1981: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 1982: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437     raeburn  1983: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
1.438     bisitz   1984:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  1985:                  .&Apache::edit::deletelist($target,$token)
                   1986:                  .'</span></td>';
1.425     raeburn  1987:         unless ($env{'environment.wysiwygeditor'} eq 'on') {
1.434     foxr     1988: 	    $result .= '<td align="left">'
                   1989: 		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   1990: 		.'</td>'
                   1991: 		.'<td>'
                   1992: 		.&Apache::edit::insertlist($target,$token)
                   1993: 		.'</td>';
                   1994: 	}
1.425     raeburn  1995: 	$result.='<td align="right" valign="top">' .
1.434     foxr     1996: 	    &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1997: 		 &Apache::edit::end_row().
1.362     albertel 1998:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1999: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 2000:     }
                   2001:     if ($target eq 'modified') {
1.219     albertel 2002: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 2003:     }
                   2004:     if ($target eq 'tex') {
                   2005: 	$result .= '\noindent ';
                   2006:     }
                   2007:     return $result;
1.34      albertel 2008: }
1.159     albertel 2009: 
1.34      albertel 2010: sub start_endouttext {
1.159     albertel 2011:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2012:     my $result='';
                   2013:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   2014:     if ($target eq "modified") {
                   2015: 	$result='<endouttext />'.
1.377     albertel 2016: 	    &Apache::edit::handle_insertafter('startouttext');
                   2017:     }
1.404     albertel 2018: 
                   2019:     my $nesting = 
                   2020: 	&Apache::lonxml::set_state('outtext',
                   2021: 				   &Apache::lonxml::get_state('outtext')-1);
                   2022:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2023: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2024: 	&Apache::lonxml::set_state('outtext', 0);
                   2025:     }
1.159     albertel 2026:     return $result;
1.34      albertel 2027: }
1.159     albertel 2028: 
1.34      albertel 2029: sub end_endouttext {
1.159     albertel 2030:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2031:     my @result=('','');
                   2032:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2033:     return (@result);
1.34      albertel 2034: }
1.159     albertel 2035: 
1.45      albertel 2036: sub delete_startouttext {
1.326     albertel 2037:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2038:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2039:     my $text=$$parser['-1']->get_text("/endouttext");
                   2040:     my $ntoken=$$parser['-1']->get_token();
                   2041:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2042:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2043:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2044:     # they did the last time round
                   2045:     &Apache::lonxml::increasedepth($ntoken);
                   2046:     &Apache::lonxml::decreasedepth($ntoken);
                   2047:     return 1;
1.193     www      2048: }
                   2049: 
                   2050: sub start_simpleeditbutton {
                   2051:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2052:     my $result='';
1.284     albertel 2053:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2054: 	($target eq 'web') &&
1.330     albertel 2055:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2056:         my $url=$env{'request.noversionuri'};
1.193     www      2057:         $url=~s/\?.*$//;
1.367     albertel 2058: 	my ($symb) = &Apache::lonnet::whichuser();
1.451     bisitz   2059: #       Warning makes more sense and is more important on edit screen
1.442     bisitz   2060: #       $result='<p class="LC_warning">'
                   2061: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
                   2062: #              .&Apache::loncommon::help_open_topic('Caching')
                   2063: #              .'</p>';
1.451     bisitz   2064:         $result.=&Apache::lonhtmlcommon::start_funclist()
                   2065:                 .&Apache::lonhtmlcommon::add_item_funclist(
                   2066:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'
                   2067:                     .&mt('Edit').'</a>')
                   2068:                 .&Apache::lonhtmlcommon::end_funclist();
1.442     bisitz   2069: 
1.193     www      2070:     }
                   2071:     return $result;
                   2072: }
                   2073: 
                   2074: sub end_simpleeditbutton {
                   2075:     return '';
1.45      albertel 2076: }
1.34      albertel 2077: 
1.428     raeburn  2078: sub practice_problem_header {
                   2079:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2080:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2081:            '</span>';
                   2082: }
                   2083: 
1.1       albertel 2084: 1;
                   2085: __END__
1.435     jms      2086: 
                   2087: =pod
                   2088: 
                   2089: =back
                   2090: 
                   2091: =cut

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