Annotation of loncom/homework/structuretags.pm, revision 1.442

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.442   ! bisitz      4: # $Id: structuretags.pm,v 1.441 2009/03/27 01:07:10 raeburn Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.254     www        28: ###
1.54      www        29: 
1.435     jms        30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
                     34: Apache::structuretags
                     35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: 
                     39: This is part of the LearningOnline Network with CAPA project
                     40: described at http://www.lon-capa.org.
                     41: 
                     42: 
                     43: =head1 NOTABLE SUBROUTINES
                     44: 
                     45: =over
                     46: 
                     47: =item 
                     48: 
                     49: =back
                     50: 
                     51: =cut
                     52: 
1.133     sakharuk   53: 
1.1       albertel   54: package Apache::structuretags; 
                     55: 
                     56: use strict;
                     57: use Apache::lonnet;
1.101     sakharuk   58: use Apache::File();
1.147     www        59: use Apache::lonmenu;
1.210     albertel   60: use Apache::lonlocal;
1.231     sakharuk   61: use Apache::lonxml;
1.434     foxr       62: use Apache::londefdef;
1.338     albertel   63: use Apache::lonenc();
1.267     albertel   64: use Time::HiRes qw( gettimeofday tv_interval );
1.356     www        65: use lib '/home/httpd/lib/perl/';
                     66: use LONCAPA;
                     67:  
1.78      harris41   68: BEGIN {
1.397     albertel   69:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
1.10      albertel   70: }
                     71: 
                     72: sub start_web {
1.326     albertel   73:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.383     albertel   74:     if ($target ne 'edit' && $target ne 'modified') {
                     75: 	my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
                     76: 	if ($target eq 'web' || $target eq 'webgrade') {
                     77: 	    return $bodytext;
                     78: 	}
                     79:     } elsif ($target eq "edit" ) {
                     80: 	my $bodytext = 
                     81: 	    &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
                     82: 	my $result = &Apache::edit::tag_start($target,$token);
                     83: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                     84: 	return $result;
                     85:     } elsif ( $target eq "modified" ) {
                     86: 	return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
1.159     albertel   87:     }
                     88:     return '';
1.10      albertel   89: }
                     90: 
                     91: sub end_web {
1.44      ng         92:     return '';
1.10      albertel   93: }
                     94: 
                     95: sub start_tex {
1.326     albertel   96:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.198     sakharuk   97:     my $result='';
1.383     albertel   98:     if ($target ne 'edit' && $target ne 'modified') {
                     99: 	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
                    100: 	if ($target eq 'tex') {
1.434     foxr      101: 	    
                    102: 	    # If inside a table, occurrences of \\ must be removed;
                    103: 	    # else the table blows up.
                    104: 
                    105: 	    if (&Apache::londefdef::is_inside_of($tagstack, "table")) {
                    106: 		$bodytext =~ s/\\\\//g;
                    107: 	    }
1.432     foxr      108: 	    return $bodytext.'{}';
1.383     albertel  109: 	}
                    110:     } elsif ($target eq "edit" ) {
                    111: 	my $bodytext = 
                    112: 	    &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
                    113: 	my $result = &Apache::edit::tag_start($target,$token);
                    114: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                    115: 	return $result;
                    116:     } elsif ( $target eq "modified" ) {
                    117: 	return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
1.159     albertel  118:     }
1.198     sakharuk  119:     return $result;;
1.10      albertel  120: }
                    121: 
                    122: sub end_tex {
1.44      ng        123:     return '';
1.9       albertel  124: }
                    125: 
1.400     albertel  126: sub homework_js {
                    127:     return &Apache::loncommon::resize_textarea_js().
1.416     raeburn   128:            &setmode_javascript().
1.400     albertel  129: 	<<'JS';
                    130: <script type="text/javascript">
                    131: function setSubmittedPart (part) {
                    132:    this.document.lonhomework.submitted.value="part_"+part;
                    133: }
                    134: 
                    135: function image_response_click (which, e) {
                    136:     init_geometry();
                    137:     if (!e) { e = window.event; } //IE
                    138:     var input_element = document.lonhomework.elements[which];
1.401     albertel  139:     var token_element = document.lonhomework.elements[which+'_token'];
1.400     albertel  140:     var token = token_element.value;
1.401     albertel  141:     var img_element   = document.getElementById(which+'_imageresponse');
1.400     albertel  142:     var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
                    143:     var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
                    144:     var click = x+':'+y;
                    145:     input_element.value = click;
                    146:     img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
                    147: }
1.416     raeburn   148: 
1.400     albertel  149: </script>
                    150: JS
                    151: }
                    152: 
1.416     raeburn   153: sub setmode_javascript {
                    154:     return <<"ENDSCRIPT";
                    155: <script type="text/javascript">
                    156: function setmode(form,probmode) {
                    157:     form.problemmode.value = probmode;
                    158:     form.submit();
                    159: }
                    160: </script>
                    161: ENDSCRIPT
                    162: }
                    163: 
1.48      albertel  164: sub page_start {
1.345     albertel  165:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                    166: 	$extra_head)=@_;
1.159     albertel  167:     my %found;
1.207     albertel  168:     foreach my $taginside (@$tagstack) {
1.159     albertel  169: 	foreach my $taglookedfor ('html','body','form') {
                    170: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    171: 	}
                    172:     }
                    173: 
1.343     albertel  174:     if ($target eq 'tex') {
                    175: 	return
                    176: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                    177: 					   $parstack,$parser,$safeeval);
                    178:     }
                    179: 
1.400     albertel  180:     $extra_head .= &homework_js();
1.374     albertel  181: 
1.434     foxr      182:     if ($env{'environment.wysiwygeditor'} eq 'on') {
                    183: 	$extra_head .= &Apache::lonhtmlcommon::dragmath_js("FCKEditMathPopup");
                    184:     } else {
                    185:         $extra_head .= &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
1.425     raeburn   186:     }
                    187: 
1.344     albertel  188:     my %body_args;
                    189:     if (defined($found{'html'})) {
                    190: 	$body_args{'skip_phases'}{'head'}=1;
                    191:     } else {
1.343     albertel  192: 	
1.345     albertel  193: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel  194: 
1.379     albertel  195: 	$extra_head .= &Apache::londefdef::generate_css_links();
                    196: 
1.384     albertel  197: 	if ($env{'request.state'} eq 'construct') {
1.343     albertel  198: 	    $extra_head.=&Apache::edit::js_change_detection().
                    199: 		"<script type=\"text/javascript\">\n".
                    200: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    201: 		&Apache::loncommon::browser_and_searcher_javascript().
                    202:                 "\n</script>\n";
                    203: 	}
1.159     albertel  204:     }
1.343     albertel  205: 
1.344     albertel  206:     if (defined($found{'body'})) {
                    207: 	$body_args{'skip_phases'}{'body'}=1;
                    208:     } elsif (!defined($found{'body'}) 
                    209: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  210: 	if ($target eq 'web' || $target eq 'edit') {
1.402     albertel  211: 	    if ($env{'environment.remote'} ne 'off') {
                    212: 		$body_args{'only_body'}  = 1;
                    213: 	    }
1.297     albertel  214: 	}
1.272     albertel  215:     } elsif (!defined($found{'body'})) {
1.343     albertel  216: 	my %add_entries;
1.159     albertel  217: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    218: 						  $safeeval);
1.343     albertel  219: 	if ($background ne '' ) {
                    220: 	    $add_entries{'background'} = $background;
                    221: 	}
1.344     albertel  222: 
1.290     albertel  223: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    224: 					       $safeeval);
1.344     albertel  225:        	if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
                    226: 
                    227: 	$body_args{'bgcolor'}        = $bgcolor;
                    228: 	$body_args{'no_title'}       = 1;
                    229: 	$body_args{'force_register'} = 1;
                    230: 	$body_args{'add_entries'}    = \%add_entries;	
1.391     albertel  231: 	if ($env{'environment.remote'} eq 'off'
                    232: 	    && $env{'request.state'} eq   'construct') {
                    233: 	    $body_args{'only_body'}  = 1;
                    234: 	}
1.344     albertel  235:     }
1.365     albertel  236:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  237:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    238: 						    \%body_args);
                    239: 
                    240:     if (!defined($found{'body'}) 
                    241: 	&& $env{'request.state'} ne 'construct'
                    242: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    243: 
1.367     albertel  244: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
1.344     albertel  245: 	if ($symb eq '' && !$publicuser) {
                    246: 	    my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
                    247: 	    $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
                    248: 	    $page_start .= $help;
1.159     albertel  249: 	}
1.344     albertel  250:     }
                    251: 
1.409     albertel  252:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  253: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  254:     }
1.344     albertel  255:     
1.159     albertel  256:     my $form_tag_start;
                    257:     if (!defined($found{'form'})) {
1.337     albertel  258: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.338     albertel  259: 	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.327     albertel  260: 	$form_tag_start.=$uri.'" ';
                    261: 	if ($target eq 'edit') {
                    262: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    263: 	}
1.368     albertel  264: 	$form_tag_start.='>'."\n";
1.355     albertel  265: 
                    266: 	my $symb=&Apache::lonnet::symbread();
                    267: 	if ($symb =~ /\S/) {
                    268: 	    $symb=
                    269: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    270: 	    $form_tag_start.=
1.368     albertel  271: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  272: 	}
1.159     albertel  273:     }
1.343     albertel  274:     return ($page_start,$form_tag_start);
1.105     albertel  275: }
                    276: 
1.141     matthew   277: #use Time::HiRes();
1.105     albertel  278: sub get_resource_name {
1.159     albertel  279:     my ($parstack,$safeeval)=@_;
1.388     foxr      280:     my $name;
1.204     albertel  281:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      282: 	$name = $Apache::lonhomework::name;
                    283:     } else {
                    284: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  285: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      286: 	if ($name eq '') {
                    287: 	    $name=&Apache::lonnet::EXT('resource.title');
                    288: 	    if ($name eq 'con_lost') { $name = ''; }
                    289: 	}
                    290: 	if ($name!~/\S+/) {
                    291: 	    $name=$env{'request.uri'};
                    292: 	    $name=~s-.*/([^/]+)$-$1-;
                    293: 	}
                    294: 	# The name has had html tags escaped:
                    295:        
                    296: 	$name=~s/&lt;/</gs;
                    297: 	$name=~s/&gt;/>/gs;
                    298: 
                    299: 	$Apache::lonhomework::name=$name;
1.204     albertel  300:     }
1.159     albertel  301:     return $name;
1.105     albertel  302: }
                    303: 
                    304: sub setup_rndseed {
1.159     albertel  305:     my ($safeeval)=@_;
                    306:     my $rndseed;
1.367     albertel  307:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  308:     if ($env{'request.state'} eq "construct" 
                    309: 	|| $symb eq '' 
                    310: 	|| $Apache::lonhomework::type eq 'practice'
                    311: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       312: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  313: 						['rndseed']);
1.284     albertel  314: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  315: 	if (!$rndseed) {
1.162     albertel  316: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    317: 	    if (!$rndseed) {
                    318: 		$rndseed=time;
                    319: 	    }
1.284     albertel  320: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  321: 	}
1.374     albertel  322: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    323: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  324: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  325: 	    srand(time);
                    326: 	    $rndseed=int(rand(2100000000));
1.284     albertel  327: 	    $env{'form.rndseed'}=$rndseed;
                    328: 	    delete($env{'form.resetdata'});
                    329: 	    delete($env{'form.newrandomization'});
1.159     albertel  330: 	}
1.187     albertel  331: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  332: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  333:         }
1.247     albertel  334:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    335: 	   $rndseed=&Apache::lonnet::rndseed();
                    336: 	}
1.221     albertel  337: 	if ($safeeval) {
                    338: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  339: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  340: 	}
1.159     albertel  341:     }
                    342:     return $rndseed;
1.105     albertel  343: }
                    344: 
1.268     albertel  345: sub remember_problem_state {
                    346:     return '
1.284     albertel  347:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    348:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    349:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  350: }
                    351: 
1.423     www       352: sub problem_edit_buttons {
                    353:    return  '
1.408     albertel  354: <div class="LC_edit_problem_discards">
1.416     raeburn   355:        <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
1.423     www       356:        ' onclick="javscript:setmode(this.form,'."'discard'".')"  />
1.416     raeburn   357:        <input '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'editxml'".')').' type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" />
1.407     albertel  358:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.408     albertel  359: </div>
                    360: <div class="LC_edit_problem_saves">
1.416     raeburn   361:        <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save and Edit').'" />
                    362:        <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
1.423     www       363: </div>';
                    364: }
                    365: 
                    366: sub problem_edit_header {
                    367:     return '<input type="hidden" name="submitted" value="edit" /><input type="hidden" name="problemmode" value="edit" />'.
                    368: 	&Apache::structuretags::remember_problem_state().'
                    369: <div class="LC_edit_problem_header">
                    370: <div class="LC_edit_problem_header_title">
                    371: '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    372: </div>'.
                    373: &problem_edit_buttons().'
1.408     albertel  374: <hr class="LC_edit_problem_divide" />
1.409     albertel  375: '.&Apache::lonxml::message_location().'
1.408     albertel  376: </div>
                    377: '.
1.282     albertel  378:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  379: }
                    380: 
                    381: sub problem_edit_footer {
1.412     albertel  382:     return '</td></tr></table><br />
                    383: <div class="LC_edit_problem_footer">
1.423     www       384:   <hr class="LC_edit_problem_divide" />'.
                    385: &problem_edit_buttons().'
1.412     albertel  386:   <hr class="LC_edit_problem_divide" />
                    387: </div>
                    388: '.
                    389: 
1.348     albertel  390:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  391:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  392: }
                    393: 
1.235     albertel  394: sub option {
                    395:     my ($value,$name) = @_;
                    396:     my $result ="<option value='".$value."' ";
1.284     albertel  397:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  398: 	$result.=" selected='on' ";
                    399:     }
                    400:     $result.='>';
                    401:     return $result;
                    402: }
                    403: 
1.105     albertel  404: sub problem_web_to_edit_header {
1.159     albertel  405:     my ($rndseed)=@_;
1.406     albertel  406:     my $result .= '<div class="LC_edit_problem_header">';
                    407: 
                    408:     if (!$Apache::lonhomework::parsing_a_task) {
                    409: 	$result .= 
                    410: 	    '<div class="LC_edit_problem_header_title">'.
                    411: 	    &mt('Problem Testing').
                    412: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    413: 	    '</div>';
                    414:     } else {
                    415: 	$result .= 
                    416: 	    '<div class="LC_edit_problem_header_title">'.
                    417: 	    &mt('Task Testing').
                    418: 	    '</div>';
                    419:     }
                    420:     
1.315     albertel  421:     my $show_all_foils_text = 
                    422: 	($Apache::lonhomework::parsing_a_task) ?
                    423: 	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
                    424: 	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    425: 
1.440     bisitz    426:     my $show_all= '<span class="LC_nobreak"><label><input type="checkbox" name="showallfoils"';
                    427:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.406     albertel  428:     $show_all.= ' />'.$show_all_foils_text.'</label></span>';
                    429: 
                    430: 
1.384     albertel  431: 
1.406     albertel  432:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  433:     if (!$Apache::lonhomework::parsing_a_task) {
                    434: 	$result.="
1.406     albertel  435: <div class='LC_edit_problem_header_row1'>
                    436: <span class=\"LC_nobreak\">
1.405     albertel  437: ".&mt("Problem Status:")."
1.235     albertel  438: <select name='problemstate'>
1.270     albertel  439:   <option value=''></option>
1.235     albertel  440:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    441:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    442:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    443:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    444:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    445: </select>
1.406     albertel  446: </span>
                    447: <span class=\"LC_nobreak\">
1.405     albertel  448: ".&mt("Problem Type:")."
1.235     albertel  449: <select name='problemtype'>
1.270     albertel  450:   <option value=''></option>
1.242     albertel  451:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   452:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  453:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.428     raeburn   454:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.235     albertel  455: </select>
1.406     albertel  456: </span>
                    457: $show_all
                    458: </div>
                    459: <div class='LC_edit_problem_header_row2'>
                    460: <span class=\"LC_nobreak\">
1.405     albertel  461: ".&mt("Feedback Mode:")."
1.235     albertel  462: <select name='problemstatus'>
                    463:   <option value=''></option>
1.242     albertel  464:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  465:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    466:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  467: </select>
1.406     albertel  468: </span>
                    469: ";
                    470: 
1.376     albertel  471:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    472: 	$result.="
1.406     albertel  473: <div class='LC_edit_problem_header_row1'>
                    474: <span class=\"LC_nobreak\">
1.405     albertel  475: ".&mt("Problem Status:")."
1.376     albertel  476: <select name='problemstate'>
                    477:   <option value=''></option>
                    478:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    479:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    480:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    481:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    482: </select>
1.406     albertel  483: </span>
                    484: $show_all
                    485: ";
                    486:     }
                    487:     $result.='
                    488:        <span class="LC_nobreak">
                    489:        '.&mt('Apply style file: ').'
                    490:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    491:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    492:        </span>
1.422     www       493:      </div>
                    494:      <div class="LC_edit_problem_header_row1">'.
                    495:        &Apache::lonxml::renderingoptions().'
1.406     albertel  496:      </div>
                    497:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    498:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    499:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    500:    </div>
                    501:    <hr class="LC_edit_problem_divide" />
                    502:    <div class="LC_edit_problem_header_randomize_row">
                    503:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    504:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
                    505:      <input type="text" name="rndseed" size="10" value="'.
                    506: 	       $rndseed.'"
                    507:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    508: 
                    509:     if (!$Apache::lonhomework::parsing_a_task) {
                    510: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    511: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  512: 	$result .= '<span class="LC_nobreak">'.
                    513: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   514: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    515:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    516:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  517: 		$numtoanalyze.'" size="5" />').
                    518: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    519: 		'</span>';
                    520: 						    
1.313     albertel  521:     }
1.406     albertel  522: 
                    523:     $result.='
                    524:    </div>
1.408     albertel  525:    <div class="LC_edit_problem_header_edit_row">';
1.416     raeburn   526:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    527:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    528:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    529:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    530:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  531:     $result.='
                    532:    </div>
1.409     albertel  533:    '.&Apache::lonxml::message_location().'
1.406     albertel  534: </div>';
1.159     albertel  535:     return $result;
1.48      albertel  536: }
                    537: 
1.65      albertel  538: sub initialize_storage {
1.357     albertel  539:     my ($given_symb) = @_;
1.353     albertel  540:     undef(%Apache::lonhomework::results);
                    541:     undef(%Apache::lonhomework::history);
1.357     albertel  542:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  543: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  544:     
                    545:     # anonymous users (CODEd exams) have no data
                    546:     if ($name eq 'anonymous' 
                    547: 	&& !defined($domain)) {
                    548: 	return;
                    549:     }
                    550: 
1.333     albertel  551:     if ($env{'request.state'} eq 'construct' 
                    552: 	|| $symb eq ''
                    553: 	|| $Apache::lonhomework::type eq 'practice') {
                    554: 	
                    555: 	my $namespace = $symb || $env{'request.uri'};
                    556: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  557: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    558: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  559: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    560: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    561: 	    &Apache::lonxml::debug("Attempt reset");
                    562: 	}
1.159     albertel  563: 	%Apache::lonhomework::history=
1.333     albertel  564: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  565: 	my ($temp)=keys %Apache::lonhomework::history ;
                    566: 	&Apache::lonxml::debug("Return message of $temp");
                    567:     } else {
                    568: 	%Apache::lonhomework::history=
                    569: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    570:     }
1.353     albertel  571: 
1.159     albertel  572:     #ignore error conditions
1.67      albertel  573:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  574:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  575: }
                    576: 
1.435     jms       577: =pod
                    578: 
                    579: =item finalize_storage()
                    580: 
                    581: 	Stores away the result has to a student's environment
                    582: 	checks form.grade_ for specific values, other wises stores
                    583: 	to the running users environment
                    584: 	Will increment totals for attempts, students, and corrects
                    585: 	if running user has student role.
                    586: 	
                    587: =cut
                    588: 
                    589: 
1.65      albertel  590: sub finalize_storage {
1.357     albertel  591:     my ($given_symb) = @_;
1.159     albertel  592:     my $result;
1.289     albertel  593:     if (%Apache::lonhomework::results) {
1.323     albertel  594: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    595: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  596: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  597: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  598: 	if ($env{'request.state'} eq 'construct' 
                    599: 	    || $symb eq ''
                    600: 	    || $Apache::lonhomework::type eq 'practice') {
                    601: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  602: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  603: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  604: 					      $namespace,'',$domain,$name);
1.159     albertel  605: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    606: 	} else {
                    607: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    608: 					    $symb,$courseid,$domain,$name);
                    609: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   610:             if ($env{'request.role'} =~/^st/) {
                    611:                 &store_aggregates($symb,$courseid);
                    612:             }
1.159     albertel  613: 	}
1.323     albertel  614:     } else {
                    615: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  616:     }
1.159     albertel  617:     return $result;
1.65      albertel  618: }
                    619: 
1.435     jms       620: =pod
                    621: 
                    622: item store_aggregates()
                    623: 
                    624: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                    625: 	for the course. Increments total number of attempts, unique students 
                    626: 	and corrects for each part for an instance of a problem, as appropriate.
                    627: 	
                    628: =cut
                    629: 
1.285     raeburn   630: sub store_aggregates {
                    631:     my ($symb,$courseid) = @_;
1.286     albertel  632:     my %aggregate;
                    633:     my @parts;
1.288     albertel  634:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    635:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  636:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  637:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  638:             push(@parts, $1);
1.285     raeburn   639:         }
                    640:     }
1.286     albertel  641:     foreach my $part (@parts) {
                    642:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    643: 	    eq 'APPROX_ANS' ||
                    644: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    645: 	    eq 'EXACT_ANS') {
1.287     albertel  646:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   647:         }
1.286     albertel  648:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  649:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   650:         } else {
1.293     albertel  651:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   652:             if ($last_reset) {
1.293     albertel  653:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   654:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    655:                 }
                    656:             }
1.285     raeburn   657:         }
1.287     albertel  658:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   659:     }
1.292     raeburn   660:     if (keys (%aggregate) > 0) {
1.289     albertel  661: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   662:                             $cdomain,$cname);
                    663:     }
                    664: }
1.289     albertel  665: 
1.65      albertel  666: sub checkout_msg {
1.211     albertel  667:     my %lt=&Apache::lonlocal::texthash( 
                    668: 		'resource'=>'The resource needs to be checked out',
                    669: 		'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.',
                    670:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    671:                 'checkout'=>'Check out Exam for Viewing',
                    672: 		'checkout?'=>'Check out Exam?');
1.352     albertel  673:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  674:     return (<<ENDCHECKOUT);
1.211     albertel  675: <h2>$lt{'resource'}</h2>
                    676:     <p>$lt{'id_expln'}</p>
                    677: <font color="red">
                    678: <p>$lt{'warning'}</p>
1.91      albertel  679: </font>
1.352     albertel  680: <form name="checkout" method="POST" action="$uri">
1.91      albertel  681: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  682: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  683: </form>
                    684: ENDCHECKOUT
                    685: }
                    686: 
1.252     albertel  687: sub firstaccess_msg {
1.253     albertel  688:     my ($time,$symb)=@_;
1.414     albertel  689:     my $result;
                    690:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    691:     if ($interval[1] eq 'map') {
                    692: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                    693: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                    694:     
                    695: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.418     bisitz    696: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    697:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    698:                              ,$foldertitle,$time)."</h2>";
1.414     albertel  699:     } elsif ($interval[1] eq 'course') {
                    700: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.418     bisitz    701:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    702:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    703:                              ,$course,$time)."</h2>";
1.414     albertel  704:     } else {
                    705: 	my $title=&Apache::lonnet::gettitle($symb);
1.418     bisitz    706:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
                    707:                              .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                    708:                              ,$title,$time)."</h2>";
1.414     albertel  709:     }
1.352     albertel  710:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz    711:     my $buttontext = &mt('Show Resource');
                    712:     my $timertext = &mt('Start Timer?');
1.414     albertel  713:     $result .= (<<ENDCHECKOUT);
1.352     albertel  714: <form name="markaccess" method="POST" action="$uri">
1.252     albertel  715: <input type="hidden" name="markaccess" value="yes" />
1.418     bisitz    716: <input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel  717: </form>
                    718: ENDCHECKOUT
1.414     albertel  719:     return $result;
1.252     albertel  720: }
                    721: 
1.204     albertel  722: sub init_problem_globals {
                    723:     my ($type)=@_;
                    724:     #initialize globals
1.308     foxr      725:     #   For problems, we start out in part 0 (outside a <part> tag).
                    726:     #   and part 0 is used to describe the main body of the <problem>
                    727:     #
1.204     albertel  728:     if ($type eq 'problem') {
                    729: 	$Apache::inputtags::part='0';
                    730: 	@Apache::inputtags::partlist=('0');
1.405     albertel  731: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel  732: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      733: 
1.266     albertel  734:     } elsif ($type eq 'library') {
1.204     albertel  735: 	$Apache::inputtags::part='';
                    736: 	@Apache::inputtags::partlist=();
1.405     albertel  737: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel  738: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      739: 
1.304     albertel  740:     } elsif ($type eq 'Task') {
                    741: 	$Apache::inputtags::part='0';
                    742: 	@Apache::inputtags::partlist=('0');
1.405     albertel  743: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel  744: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  745:     }
                    746:     @Apache::inputtags::responselist = ();
                    747:     @Apache::inputtags::importlist = ();
                    748:     @Apache::inputtags::previous=();
                    749:     @Apache::inputtags::previous_version=();
                    750:     $Apache::structuretags::printanswer='No';
                    751:     @Apache::structuretags::whileconds=();
                    752:     @Apache::structuretags::whilebody=();
                    753:     @Apache::structuretags::whileline=();
                    754:     $Apache::lonhomework::scantronmode=0;
                    755:     undef($Apache::lonhomework::name);
1.358     albertel  756:     undef($Apache::lonhomework::default_type);
                    757:     undef($Apache::lonhomework::type);
1.204     albertel  758: }
                    759: 
                    760: sub reset_problem_globals {
                    761:     my ($type)=@_;
                    762:     undef(%Apache::lonhomework::history);
                    763:     undef(%Apache::lonhomework::results);
                    764:     undef($Apache::inputtags::part);
1.208     albertel  765: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    766: #detect if we try to do 2 problems in one file
                    767: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  768:     undef($Apache::lonhomework::name);
1.358     albertel  769:     undef($Apache::lonhomework::default_type);
                    770:     undef($Apache::lonhomework::type);
                    771:     undef($Apache::lonhomework::scantronmode);
                    772:     undef($Apache::lonhomework::ignore_response_errors);
1.405     albertel  773:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel  774: }
                    775: 
1.241     albertel  776: sub set_problem_state {
1.240     albertel  777:     my ($part)=@_;
1.284     albertel  778:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  779: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    780: 	    'correct_by_student';
                    781:     }
                    782: }
                    783: 
1.241     albertel  784: sub get_problem_status {
                    785:     my ($part)=@_;
1.267     albertel  786:     my $problem_status;
1.284     albertel  787:     if ($env{'request.state'} eq 'construct' &&
                    788: 	defined($env{'form.problemstatus'})) {
                    789: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  790:     } else {
                    791: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    792: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  793: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  794:     }
                    795:     return $problem_status;
                    796: }
                    797: 
1.9       albertel  798: sub start_problem {
1.326     albertel  799:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  800: 
1.311     foxr      801:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  802:     if (!$Apache::lonxml::metamode) {
                    803: 	&Apache::lonxml::startredirection();
                    804:     }
1.311     foxr      805: 
1.308     foxr      806:     # Problems don't nest and we don't allow more than one <problem> in
                    807:     # a .problem file.
                    808:     #
1.184     albertel  809:     if ( $Apache::inputtags::part ne '' ||
                    810: 	 $Apache::lonhomework::parsing_a_problem) {
                    811: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  812: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  813: 	return '';
                    814:     }
1.184     albertel  815: 
                    816:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  817:     &init_problem_globals('problem');
1.166     albertel  818: 
1.284     albertel  819:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  820: 	$Apache::lonhomework::scantronmode=1;
                    821:     }
1.161     albertel  822: 
1.159     albertel  823:     if ($target ne 'analyze') {
1.415     raeburn   824:         my $type = &Apache::lonnet::EXT('resource.0.type');
                    825: 	$Apache::lonhomework::type=$type;
1.284     albertel  826: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel  827: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel  828: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  829: 	}
1.332     albertel  830: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  831:     }
1.164     albertel  832:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  833: 	my $uri=$env{'request.uri'};
1.159     albertel  834: 	if ($uri=~/\.(\w+)$/) {
                    835: 	    $Apache::lonhomework::type=$1;
                    836: 	    &Apache::lonxml::debug("Using type of $1");
                    837: 	} else {
                    838: 	    $Apache::lonhomework::type='problem';
                    839: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    840: 	}
1.87      albertel  841:     }
1.301     albertel  842:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       843: 
1.363     albertel  844:     &initialize_storage();
1.389     albertel  845:     if ($target ne 'analyze'
                    846:        	&& $env{'request.state'} eq 'construct') {
                    847: 	&set_problem_state('0');
                    848:     }
                    849: 
1.366     albertel  850:     if ($target eq 'web') {
                    851: 	&Apache::lonxml::debug(" grading history ");
                    852: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    853:     }
1.363     albertel  854: 
1.159     albertel  855:     #added vars to the scripting enviroment
1.213     albertel  856:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  857:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  858:     &Apache::run::run($expression,$safeeval);
1.159     albertel  859:     my $status;
                    860:     my $accessmsg;
                    861: 
1.343     albertel  862:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  863:     my ($result,$form_tag_start);
1.354     albertel  864:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    865: 	|| $target eq 'edit') {
1.350     albertel  866: 	($result,$form_tag_start) =
                    867: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    868: 			$name);
                    869:     }
                    870: 
1.284     albertel  871:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  872: 
                    873:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    874:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    875: 	$target eq 'tex') {
                    876: 	#handle exam checkout
                    877: 	if ($Apache::lonhomework::type eq 'exam') {
                    878: 	    my $token=
                    879: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  880: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  881: 		$token=&Apache::lonxml::maketoken();
                    882: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    883: 		    $token;
                    884: 	    }
1.343     albertel  885: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  886: 	}
1.284     albertel  887: 	if ($env{'form.markaccess'}) {
1.414     albertel  888: 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    889: 	    &Apache::lonnet::set_first_access($interval[1]);
1.252     albertel  890: 	}
1.159     albertel  891: 	#handle rand seed in construction space
                    892: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  893: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  894: 	if ($env{'request.state'} ne "construct" && 
                    895: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  896: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    897: 		$rndseed.'" />'.
                    898: 		    '<input type="submit" name="resetdata"
1.334     albertel  899:                              value="'.&mt('New Problem Variation').'" />';
                    900: 	    if (exists($env{'form.username'})) {
                    901: 		$form_tag_start.=
1.164     albertel  902: 		    '<input type="hidden" name="username"
1.284     albertel  903:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  904: 	    }
1.333     albertel  905: 	    if ($env{'request.role.adv'}) {
1.267     albertel  906: 		$form_tag_start.=
1.440     bisitz    907: 		    ' <label><input type="checkbox" name="showallfoils"';
1.284     albertel  908: 		if (defined($env{'form.showallfoils'})) {
1.440     bisitz    909: 		    $form_tag_start.=' checked="checked"';
1.267     albertel  910: 		}
1.300     albertel  911: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    912: 		    '</label>';
1.267     albertel  913: 	    }
1.417     www       914:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn   915:                 $form_tag_start.=&practice_problem_header();
1.417     www       916:             }
1.267     albertel  917: 	    $form_tag_start.='<hr />';
1.162     albertel  918: 	}
1.324     albertel  919: 
                    920: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    921: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  922: 	push (@Apache::inputtags::status,$status);
1.324     albertel  923: 
1.159     albertel  924: 	my $expression='$external::datestatus="'.$status.'";';
                    925: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    926: 	&Apache::run::run($expression,$safeeval);
                    927: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  928: 
1.159     albertel  929: 	if (( $status eq 'CLOSED' ) ||
                    930: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  931: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  932: 	    ( $status eq 'BANNED') ||
1.216     albertel  933: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  934: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  935: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  936: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    937: 						       $style);
1.159     albertel  938: 	    if ( $target eq "web" ) {
1.343     albertel  939: 		my $msg;
1.159     albertel  940: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  941: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.441     raeburn   942:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                    943:                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
1.253     albertel  944: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  945: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  946: 		}
1.216     albertel  947: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       948: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  949: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  950: 		    $msg.=&checkout_msg();
1.252     albertel  951: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  952: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  953: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn   954: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.159     albertel  955: 		}
                    956: 		$result.=$msg.'<br />';
                    957: 	    } elsif ($target eq 'tex') {
1.332     albertel  958: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    959: 		                    : '\begin{minipage}{\textwidth}';
                    960: 		$result.='\begin{document}\noindent \vskip 1 mm '.
                    961: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  962: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  963: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  964: 		} else {
1.211     albertel  965: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  966: 		}
                    967: 	    }
1.324     albertel  968: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  969: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    970: 						       $style);
1.324     albertel  971: 	    if ($target eq 'web') {
1.375     albertel  972: 		$result .= 
                    973: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  974: 	    } elsif ($target eq 'grade') {
                    975: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    976: 							'problem');
                    977: 	    }
1.159     albertel  978: 	} elsif ($target eq 'web') {
1.360     albertel  979: 	    if ($status eq 'CAN_ANSWER' 
                    980: 		&& $slot_name ne ''
                    981: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    982: 		# unproctored slot access, self checkin
                    983: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    984: 					      $slot_name);
                    985: 	    }
1.368     albertel  986: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  987: 	      '<input type="hidden" name="submitted" value="yes" />';
                    988: 	    # create a page header and exit
1.284     albertel  989: 	    if ($env{'request.state'} eq "construct") {
                    990: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn   991:                 if ($Apache::lonhomework::type eq 'practice') {
                    992:                     $result.= '<input type="submit" name="resetdata" '.
                    993:                               'value="'.&mt('New Problem Variation').'" />'.
                    994:                               &practice_problem_header().'<hr />';
                    995:                 }
1.227     albertel  996: 	    }
                    997: 	    # if we are viewing someone else preserve that info
1.284     albertel  998: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  999: 		foreach my $field ('symb','courseid','domain','username') {
                   1000: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1001: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1002: 		}
                   1003: 	    }
                   1004: 	} elsif ($target eq 'tex') {
1.319     foxr     1005: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                   1006: 
1.99      sakharuk 1007: 	}
1.159     albertel 1008:     } elsif ($target eq 'edit') {
1.343     albertel 1009: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1010: 	$Apache::lonxml::warnings_error_header=
                   1011: 	    &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 1012: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1013: 	$result.=$temp;
                   1014:     } elsif ($target eq 'modified') {
                   1015: 	$result=$token->[4];
                   1016:     } else {
                   1017: 	# page_start returned a starting result, delete it if we don't need it
                   1018: 	$result = '';
1.99      sakharuk 1019:     }
1.159     albertel 1020:     return $result;
1.9       albertel 1021: }
                   1022: 
                   1023: sub end_problem {
1.159     albertel 1024:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1025:     my $result;
1.310     foxr     1026: 
1.321     albertel 1027:     if (!$Apache::lonxml::metamode) {
                   1028: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1029: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1030:     }
1.319     foxr     1031: 
                   1032:     if ($target eq 'tex') {
1.321     albertel 1033: 	# Figure out the front matter and replace the
                   1034: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1035: 	# this in end_problem because whether or not we display due
                   1036: 	# dates depends on whether due dates have already been
                   1037: 	# displayed in the problem parts.
                   1038: 
1.319     foxr     1039: 	my $frontmatter   = '';
                   1040: 	my $startminipage = '';
                   1041: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1042: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1043: 	}
                   1044: 	my $id = $Apache::inputtags::part;
                   1045: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1046: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1047: 	my @packages = split /,/,$packages;
                   1048: 	my $allow_print_points = 0;
                   1049: 	foreach my $partial_key (@packages) {
                   1050: 	    if ($partial_key=~m/^part_0$/) {
                   1051: 		$allow_print_points=1;
                   1052: 	    }
                   1053: 	}
                   1054: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1055: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1056: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1057: 			'.disableexampointprint'}) eq 'yes') {
                   1058: 	    $allow_print_points=0;
                   1059: 	}
                   1060: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                   1061: 	my $begin_doc='\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
                   1062: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1063: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1064: 	
                   1065: 	#  Figure out what the due date is and if we need to print
                   1066: 	#  it in the problem header.  We have been logging the
                   1067: 	#  last due date written to file. 
                   1068: 	
                   1069: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                   1070: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                   1071: 	my $temp_file;
                   1072: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1073: 	
                   1074: 	# Figure out what the last printed due date is or set it
                   1075: 	# to the epoch if no duedates have been printed.
                   1076: 	
                   1077: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1078: 	if (-e $filename) {
                   1079: 	    $temp_file = Apache::File->new($filename);
                   1080: 	    my @due_file      = <$temp_file>;
                   1081: 	    $due_file_content = $due_file[$#due_file];
                   1082: 	    chomp $due_file_content;
                   1083: 	} 
                   1084: 	
                   1085: 	# We display the due date iff it is not the same as the last
                   1086: 	# duedate in problem header ($due_file_content), and
                   1087: 	# none of our parts displayed a duedate.
                   1088: 	#
                   1089: 	my $parts_with_displayduedate;
                   1090: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1091: 	    $parts_with_displayduedate = 
                   1092: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1093: 	} else {
                   1094: 	    $parts_with_displayduedate = 0;
                   1095: 	}
                   1096: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1097: 	    $temp_file = Apache::File->new('>'.$filename);
                   1098: 	    print $temp_file "$duetime\n";
                   1099: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1100: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1101: 		    $frontmatter .= $begin_doc.
                   1102: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                   1103: 		} else {
                   1104: 		    $frontmatter.= $begin_doc.$toc_line;
                   1105: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1106: 		}
                   1107: 	    } else {
1.381     albertel 1108: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'.$startminipage;
1.319     foxr     1109: 	    }
                   1110: 	} else {
                   1111: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1112: 		$frontmatter .= $begin_doc.$toc_line;
                   1113: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1114: 	    } else {
1.381     albertel 1115: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1116: 	    }
                   1117: 	}
                   1118: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1119:     }
                   1120: 
1.159     albertel 1121:     my $status=$Apache::inputtags::status['-1'];
                   1122:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1123: 	$target eq 'tex') {
1.249     albertel 1124: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1125: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1126: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1127: 		&Apache::inputtags::grade;
1.324     albertel 1128: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1129: 		# no need to grade, and don't want to hide data
1.249     albertel 1130: 	    } else {
                   1131: 		# move any submission data to .hidden
                   1132: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1133: 	    }
1.159     albertel 1134: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1135: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1136: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1137: 	    # if part is zero, no <part>s existed, so we need show the current
                   1138: 	    # grading status
                   1139: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1140: 	    $result.= $gradestatus;
                   1141: 	}
                   1142: 	if (
1.284     albertel 1143: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1144: 	    ($target eq 'answer') || ($target eq 'tex')
                   1145: 	   ) {
1.227     albertel 1146: 	    if ($target ne 'tex' &&
1.284     albertel 1147: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1148: 		$result.="</form>";
1.348     albertel 1149: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel 1150: 	    }
                   1151: 	    if ($target eq 'web') {
1.346     albertel 1152: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1153: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1154: 		my $endminipage = '';
1.284     albertel 1155: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1156: 		    $endminipage = '\end{minipage}';
                   1157: 		}
1.284     albertel 1158:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1159: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1160: 		} else {
1.262     sakharuk 1161: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1162: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1163: 			$result .= $endminipage.'\end{document} ';
                   1164: 		    } else {
1.382     albertel 1165: 			$result .= $endminipage;
1.262     sakharuk 1166: 		    }
1.159     albertel 1167: 		}
                   1168: 	    }
                   1169: 	}
                   1170: 	if ($target eq 'grade') {
                   1171: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1172: 	    &finalize_storage();
                   1173: 	}
1.284     albertel 1174: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1175: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1176: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1177: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1178: 	                        # we always show answer mode too.
1.159     albertel 1179: 	}
                   1180:     } elsif ($target eq 'meta') {
                   1181: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1182: 	    @Apache::inputtags::response=();
1.159     albertel 1183: 	    $result=&Apache::response::mandatory_part_meta;
                   1184: 	}
1.215     albertel 1185: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1186: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1187:     } elsif ($target eq 'edit') {
                   1188: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1189: 	$result .= &problem_edit_footer();
1.320     albertel 1190:     } elsif ($target eq 'modified') {
                   1191: 	 $result .= $token->[2];
1.159     albertel 1192:     }
1.155     albertel 1193: 
1.284     albertel 1194:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1195: 	&Apache::inputtags::check_for_duplicate_ids();
                   1196:     }
1.204     albertel 1197: 
                   1198:     &reset_problem_globals('problem');
1.159     albertel 1199: 
                   1200:     return $result;
1.48      albertel 1201: }
                   1202: 
1.108     albertel 1203: 
1.48      albertel 1204: sub start_library {
1.159     albertel 1205:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1206:     my ($result,$form_tag_start);
1.371     albertel 1207:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1208: 	&init_problem_globals('library');
                   1209: 	$Apache::lonhomework::type='problem';
                   1210:     }
1.159     albertel 1211:     if ($target eq 'edit') {
1.343     albertel 1212: 	($result,$form_tag_start)=
                   1213: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1214: 			'Edit');
                   1215: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1216: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1217: 	$result.=$temp;
                   1218:     } elsif ($target eq 'modified') {
                   1219: 	$result=$token->[4];
1.340     albertel 1220:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1221: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1222: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1223: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1224: 	($result,$form_tag_start)=
                   1225: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1226: 			$name);
1.159     albertel 1227: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1228: 	$result.=" \n $form_tag_start".	
1.159     albertel 1229: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1230: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1231:         if ($Apache::lonhomework::type eq 'practice') {
                   1232:             $result.= '<input type="submit" name="resetdata" '.
                   1233:                       'value="'.&mt('New Problem Variation').'" />'.
                   1234:                       &practice_problem_header().'<hr />';
                   1235:         }
1.159     albertel 1236:     }
                   1237:     return $result;
1.48      albertel 1238: }
                   1239: 
                   1240: sub end_library {
1.159     albertel 1241:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1242:     my $result='';
                   1243:     if ($target eq 'edit') {
                   1244: 	$result=&problem_edit_footer();
1.371     albertel 1245:     } elsif ($target eq 'web' 
                   1246: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1247: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1248: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1249:     }
1.371     albertel 1250:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1251: 	&reset_problem_globals('library');
                   1252:     }
1.159     albertel 1253:     return $result;
1.197     www      1254: }
                   1255: 
                   1256: sub start_definetag {
1.326     albertel 1257:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1258: 
                   1259:     my $result;
                   1260: 
                   1261:     my $name = $token->[2]->{'name'};
1.326     albertel 1262:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1263:     if ($target eq 'web') {
                   1264: 	if ($name=~/^\//) {
                   1265: 	    $result=
                   1266: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1267: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1268: 	} else {
                   1269: 	    $result=
                   1270: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1271: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1272: 	}
                   1273: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1274: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1275:     }
                   1276:     return $result;
                   1277: }
                   1278: 
                   1279: sub end_definetag {
                   1280:     return '';
1.1       albertel 1281: }
                   1282: 
                   1283: sub start_block {
1.201     albertel 1284:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1285: 
                   1286:     my $result;
1.1       albertel 1287: 
1.339     albertel 1288:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1289: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1290: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1291: 	if (defined($code) && $code ne '') {
1.137     albertel 1292: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1293: 		&Apache::lonxml::default_homework_load($safeeval);
                   1294: 	    }
1.131     albertel 1295: 	    $result = &Apache::run::run($code,$safeeval);
                   1296: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1297: 	} else {
                   1298: 	    $result='1';
                   1299: 	}
                   1300: 	if ( ! $result ) {
1.201     albertel 1301: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1302: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1303: 	}
                   1304: 	$result='';
                   1305:     } elsif ($target eq 'edit') {
                   1306: 	$result .=&Apache::edit::tag_start($target,$token);
                   1307: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1308: 					  $token,40);
                   1309: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1310:     } elsif ($target eq 'modified') {
                   1311: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1312: 						     $safeeval,'condition');
                   1313: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1314:     }
1.131     albertel 1315:     return $result;
1.1       albertel 1316: }
                   1317: 
                   1318: sub end_block {
1.167     www      1319:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1320:     my $result;
                   1321:     if ($target eq "edit") {
                   1322: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1323:     }
                   1324:     return $result;
                   1325: }
                   1326: 
                   1327: sub start_languageblock {
1.201     albertel 1328:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1329: 
                   1330:     my $result;
                   1331: 
1.339     albertel 1332:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1333: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1334: 	my $include = $token->[2]->{'include'};
                   1335: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1336:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.394     www      1337: # This should not even happen, since we should at least have the server language
1.398     www      1338:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1339: # Now loop over all languages in order of preference
                   1340:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1341: # If the languageblock has no arguments, show the contents
1.399     www      1342:            $result=1;
                   1343:            my $found=0;
1.394     www      1344: # Do we have an include argument?
1.398     www      1345: 	   if ($include) {
1.394     www      1346: # If include is specified, by default, don't render the block
1.399     www      1347:               $result=0;
1.398     www      1348:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1349: # ... but if my preferred language is included, render it
1.398     www      1350:                  if ($included_language eq $preferred_language) {
1.399     www      1351:                     $result=1; 
                   1352:                     $found=1; 
1.398     www      1353:                  }
                   1354:               }
                   1355: 	   }
1.394     www      1356: # Do we have an exclude argument?
1.398     www      1357:            if ($exclude) {
1.399     www      1358:               $result=1;
1.398     www      1359:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1360:                  if ($excluded_language eq $preferred_language) {
1.399     www      1361:                     $result=0;
                   1362:                     $found=1;
1.398     www      1363:                  }
                   1364:               }
                   1365: 	   }
1.399     www      1366:            if ($found) { last; }
1.398     www      1367:         }
1.201     albertel 1368: 	if ( ! $result ) {
                   1369: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1370: 						   $style);
                   1371: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1372: 	}
                   1373: 	$result='';
1.167     www      1374:     } elsif ($target eq 'edit') {
                   1375: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1376: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1377: 					  $token,40);
1.211     albertel 1378: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1379: 					  $token,40);
                   1380: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1381:     } elsif ($target eq 'modified') {
                   1382: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1383: 						     $safeeval,'include',
                   1384: 						     'exclude');
1.167     www      1385: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1386:     }
                   1387:     return $result;
                   1388: }
                   1389: 
                   1390: sub end_languageblock {
1.170     www      1391:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1392:     my $result;
1.201     albertel 1393:     if ($target eq "edit") {
1.170     www      1394: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1395:     }
                   1396:     return $result;
                   1397: }
                   1398: 
1.397     albertel 1399: {
                   1400:     my %available_texts;
                   1401:     sub start_translated {
                   1402: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1403: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1404: 	undef(%available_texts);
                   1405:     }
                   1406:     
                   1407:     sub end_translated {
                   1408: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1409: 	my $result;
                   1410: 	#show the translation on viewable targets
                   1411: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1412: 	    # or non-viewable targets, if it's embedded in something that
                   1413: 	    # wants the output
                   1414: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1415: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1416: 	    my @possibilities = keys(%available_texts);
                   1417: 	    my $which = 
                   1418: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1419: 	    $result = $available_texts{$which};
                   1420: 	}
                   1421: 	undef(%available_texts);
                   1422: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1423: 	return $result;
                   1424:     }
                   1425: 
                   1426: 
                   1427:     sub start_lang {
                   1428: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1429: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1430: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1431: 	    &Apache::lonxml::startredirection();
                   1432: 	}
                   1433: 	return '';
                   1434:     }
                   1435: 
                   1436:     sub end_lang {
                   1437: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1438: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1439: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1440: 	    my $result = &Apache::lonxml::endredirection();
                   1441: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1442: 						   $safeeval);
1.431     raeburn  1443:             if ($which=~/\w/) {
                   1444:                 $available_texts{$which} = $result;
                   1445:             }
                   1446:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1447:                                                         $safeeval);
                   1448:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1449:                 if ($language=~/\w/) {
                   1450:                     $available_texts{$language} = $result;
                   1451:                 }
1.427     bisitz   1452:             }
                   1453: 
1.397     albertel 1454: 	}
                   1455: 	return '';
                   1456:     }
                   1457: }
                   1458: 
1.170     www      1459: sub start_instructorcomment {
1.201     albertel 1460:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1461: 
                   1462:     my $result;
                   1463: 
1.339     albertel 1464:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1465: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1466:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1467: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1468: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1469: 						   $parser,$style);
1.170     www      1470: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1471: 	}
                   1472: 	$result='';
                   1473:     } elsif ($target eq 'edit') {
                   1474: 	$result .=&Apache::edit::tag_start($target,$token);
                   1475: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1476:     }
                   1477:     return $result;
                   1478: }
                   1479: 
                   1480: sub end_instructorcomment {
1.159     albertel 1481:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1482:     my $result;
                   1483:     if ($target eq "edit") {
                   1484: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1485:     }
                   1486:     return $result;
1.4       tsai     1487: }
                   1488: 
                   1489: sub start_while {
1.326     albertel 1490:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1491: 
1.160     albertel 1492:     my $result;
1.339     albertel 1493:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1494: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1495: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1496: 
1.160     albertel 1497: 	push( @Apache::structuretags::whileconds, $code);
                   1498: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1499: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1500: 	}
                   1501: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1502: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1503: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1504: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1505: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1506: 	if ( $result ) {
                   1507: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1508: 	}
                   1509:     } elsif ($target eq 'edit') {
                   1510: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1511: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1512: 					  $token,40);
                   1513: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1514:     } elsif ($target eq 'modified') {
                   1515: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1516: 						     $safeeval,'condition');
                   1517: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1518:     }
1.160     albertel 1519:     return $result;
1.4       tsai     1520: }
                   1521: 
                   1522: sub end_while {
1.159     albertel 1523:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1524:     my $result;
                   1525: 
1.339     albertel 1526:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1527: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1528: 	my $code = pop(@Apache::structuretags::whileconds);
                   1529: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1530: 	my $line = pop(@Apache::structuretags::whileline);
                   1531: 	my $return = &Apache::run::run($code,$safeeval);
                   1532: 	my $starttime=time;
                   1533: 	my $error=0;
                   1534: 	while ($return) {
                   1535: 	    if (time-$starttime >
                   1536: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1537: 		$return = 0; $error=1; next;
1.161     albertel 1538: 	    }
                   1539: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1540: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1541: 		$target eq 'analyze') {
                   1542: 		# grade/answer/analyze should produce no output but if we
                   1543: 		# are redirecting, the redirecter should know what to do
                   1544: 		# with the output
                   1545: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1546: 	    }
1.161     albertel 1547: 	    $return = &Apache::run::run($code,$safeeval);
                   1548: 	}
                   1549: 	if ($error) {
1.430     bisitz   1550: 	    &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 1551: 	}
                   1552:     } elsif ($target eq "edit") {
                   1553: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1554:     }
1.160     albertel 1555:     return $result;
1.1       albertel 1556: }
1.6       tsai     1557: 
1.160     albertel 1558: # <randomlist show="1">
1.6       tsai     1559: #  <tag1>..</tag1>
                   1560: #  <tag2>..</tag2>
                   1561: #  <tag3>..</tag3>
1.160     albertel 1562: #  ...
1.6       tsai     1563: # </randomlist>
                   1564: sub start_randomlist {
1.326     albertel 1565:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1566:     my $result;
1.339     albertel 1567:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1568: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1569: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1570: 	my $b_parser= HTML::LCParser->new(\$body);
                   1571: 	$b_parser->xml_mode(1);
                   1572: 	$b_parser->marked_sections(1);
1.159     albertel 1573: 	my $b_tok;
                   1574: 	my @randomlist;
                   1575: 	my $list_item;
                   1576: 	while($b_tok = $b_parser->get_token() ) {
                   1577: 	    if($b_tok->[0] eq 'S') { # start tag
                   1578: 		# get content of the tag until matching end tag
                   1579: 		# get all text upto the matching tag
                   1580: 		# and push the content into @randomlist
                   1581: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1582: 							   $b_parser);
                   1583: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1584: 		push(@randomlist,$list_item);
                   1585: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1586:                 #         $list_item</b>";
                   1587: 	    }
                   1588: 	    if($b_tok->[0] eq 'T') { # text
                   1589: 		# what to do with text in between tags?
                   1590: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1591: 	    }
                   1592: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1593: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1594: 	    # }
                   1595: 	}
1.303     albertel 1596: 	if (@randomlist) {
                   1597: 	    my @idx_arr = (0 .. $#randomlist);
                   1598: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1599: 	    my $bodytext = '';
                   1600: 	    my $show=$#randomlist;
                   1601: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1602: 	    $showarg--;
                   1603: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  1604:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   1605:                 my @currlist;
                   1606:                 my $part = $Apache::inputtags::part;
                   1607:                 if ($part ne '') {
                   1608:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   1609:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   1610:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   1611:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1612:                         }
                   1613:                     } else {
                   1614:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1615:                     }
                   1616:                 }
                   1617:             }
1.303     albertel 1618: 	    for(0 .. $show) {
                   1619: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1620: 	    }
                   1621: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1622: 	}
                   1623:     } elsif ($target eq 'edit' ) {
                   1624: 	$result .=&Apache::edit::tag_start($target,$token);
                   1625: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1626: 					   $token,5);
                   1627: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1628:     } elsif ($target eq 'modified' ) {
                   1629: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1630: 						     $safeeval,'show');
                   1631: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1632:     }
                   1633:     return $result;
1.7       tsai     1634: }
                   1635: 
                   1636: sub shuffle {
                   1637:     my $a=shift;
                   1638:     my $i;
1.303     albertel 1639:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1640: 	&Apache::response::pushrandomnumber();
1.159     albertel 1641: 	for($i=@$a;--$i;) {
                   1642: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1643: 	    next if $i == $j;
                   1644: 	    @$a[$i,$j] = @$a[$j,$i];
                   1645: 	}
1.251     albertel 1646: 	&Apache::response::poprandomnumber();
1.7       tsai     1647:     }
1.6       tsai     1648: }
                   1649: 
                   1650: sub end_randomlist {
1.159     albertel 1651:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1652:     my $result;
                   1653:     if ($target eq 'edit' ) {
                   1654: 	$result=&Apache::edit::tag_end($target,$token,
                   1655: 				       'End Randomly Parsed Block');
                   1656:     }
                   1657:     return $result;
1.6       tsai     1658: }
                   1659: 
1.283     albertel 1660: sub ordered_show_check {
                   1661:     my $last_part=$Apache::inputtags::partlist[-2];
                   1662:     my $in_order=
                   1663: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1664:     my $in_order_show=1;
                   1665:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1666: 	$in_order_show=&Apache::response::check_status($last_part);
                   1667:     }
                   1668:     return $in_order_show;
                   1669: }
                   1670: 
1.11      albertel 1671: sub start_part {
1.326     albertel 1672:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1673:     if (!$Apache::lonxml::metamode) {
                   1674: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1675: 	                                     # duedates.
                   1676:     }
1.159     albertel 1677:     my $result='';
1.386     albertel 1678:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1679:     $Apache::inputtags::part=$id;
1.177     albertel 1680:     push(@Apache::inputtags::partlist,$id);
                   1681:     @Apache::inputtags::response=();
1.159     albertel 1682:     @Apache::inputtags::previous=();
                   1683:     @Apache::inputtags::previous_version=();
1.405     albertel 1684:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1685:     &Apache::response::reset_params();
                   1686: 
1.159     albertel 1687:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1688:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1689:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1690:     my $in_order_show=&ordered_show_check();
1.214     albertel 1691:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1692:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1693:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1694: 
                   1695:     if ($target eq 'meta') {
1.224     www      1696: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1697: 	return &Apache::response::mandatory_part_meta.
                   1698: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1699:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1700: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1701: 	if ($hidden || !$in_order_show) {
1.326     albertel 1702: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1703: 	} else {
                   1704: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1705: 	    push (@Apache::inputtags::status,$status);
                   1706: 	    my $expression='$external::datestatus="'.$status.'";';
                   1707: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1708: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1709: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1710: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1711: 	    }
1.216     albertel 1712: 	    if (( $status eq 'CLOSED' ) ||
                   1713: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1714: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1715: 		( $status eq 'BANNED') ||
                   1716: 		( $status eq 'UNAVAILABLE') ||
                   1717: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1718: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1719: 							   $style);
1.159     albertel 1720: 		if ( $target eq "web" ) {
1.211     albertel 1721: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1722: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1723: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1724: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1725: 		    } else {
1.211     albertel 1726: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1727: 		    }
1.159     albertel 1728: 		}
                   1729: 	    } else {
                   1730: 		if ($target eq 'tex') {
1.284     albertel 1731: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1732: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1733: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1734: 			} else {
                   1735: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1736: 			}
1.195     sakharuk 1737: 		    }
1.159     albertel 1738: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1739: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1740: 		    my @allkeys = split /,/,$allkeys;
                   1741: 		    my $allow_print_points = 0;
                   1742: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1743: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1744: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1745: 			}
                   1746: 		    }
1.275     albertel 1747: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1748: 		    if (defined($maxtries) && $maxtries < 0) {
                   1749: 			$allow_print_points=0;
                   1750: 		    }
1.302     albertel 1751: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1752: 				    '.disableexampointprint'}) eq 'yes') {
                   1753: 			$allow_print_points=0;
                   1754: 		    }
1.222     sakharuk 1755: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1756: 		} elsif ($target eq 'web') {
1.356     www      1757: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1758: 		}
                   1759: 	    }
                   1760: 	}
                   1761:     } elsif ($target eq 'edit') {
                   1762: 	$result.=&Apache::edit::tag_start($target,$token);
                   1763: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1764: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1765: 	    '&nbsp;&nbsp;'.
                   1766: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1767: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1768:     } elsif ($target eq 'modified') {
                   1769: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1770: 						     $safeeval,'id','display');
1.159     albertel 1771: 	if ($constructtag) {
1.225     albertel 1772: 	    #limiting ids to only letters numbers, and space
1.224     www      1773: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1774: 	    $result = &Apache::edit::rebuild_tag($token);
                   1775: 	}
                   1776:     }
                   1777:     return $result;
1.11      albertel 1778: }
                   1779: 
                   1780: sub end_part {
1.159     albertel 1781:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1782:     &Apache::lonxml::debug("in end_part $target ");
                   1783:     my $status=$Apache::inputtags::status['-1'];
                   1784:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1785:     my $in_order_show=&ordered_show_check();
1.321     albertel 1786:     my $result;
                   1787:     if (!$Apache::lonxml::metamode) {
                   1788: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1789: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1790:     }
1.312     albertel 1791:     if ($target eq 'grade') {
1.249     albertel 1792: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1793: 	    !$hidden && $in_order_show) {
1.311     foxr     1794: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1795: 	} else {
                   1796: 	    # move any submission data to .hidden
                   1797: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1798: 	}
1.283     albertel 1799:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1800: 	     !$hidden && $in_order_show) {
1.159     albertel 1801: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1802: 							$target);
1.212     albertel 1803: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1804: 	    $gradestatus='';
                   1805: 	}
1.311     foxr     1806: 	$result.=$gradestatus;
1.265     sakharuk 1807: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1808:     } elsif ($target eq 'edit') {
1.311     foxr     1809: 	$result.=&Apache::edit::end_table();
1.322     albertel 1810:     } elsif ($target eq 'modified') {
                   1811: 	 $result .= $token->[2];
1.159     albertel 1812:     }
                   1813:     pop @Apache::inputtags::status;
                   1814:     $Apache::inputtags::part='';
1.295     albertel 1815:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1816:     return $result;
1.11      albertel 1817: }
1.1       albertel 1818: 
1.25      albertel 1819: sub start_preduedate {
1.326     albertel 1820:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1821:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1822: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1823: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1824: 	if (!$Apache::lonhomework::scantronmode &&
                   1825: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1826: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1827: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1828: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1829: 	}
1.24      albertel 1830:     }
1.159     albertel 1831:     return '';
1.24      albertel 1832: }
                   1833: 
1.25      albertel 1834: sub end_preduedate {
1.159     albertel 1835:     return '';
1.24      albertel 1836: }
                   1837: 
1.369     foxr     1838: # In all the modes where <postanswerdate> text is 
                   1839: # displayable,  all we do is eat up the text between the start/stop
                   1840: # tags if the conditions are not right to display it.
1.25      albertel 1841: sub start_postanswerdate {
1.326     albertel 1842:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1843:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1844: 	&Apache::lonnet::allowed('pav',
                   1845: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1846:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1847: 	$target eq 'tex' ) {
1.300     albertel 1848: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1849: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1850: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1851: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1852: 	}
                   1853:     }
                   1854:     return '';
1.24      albertel 1855: }
                   1856: 
1.25      albertel 1857: sub end_postanswerdate {
1.159     albertel 1858:     return '';
1.24      albertel 1859: }
                   1860: 
1.25      albertel 1861: sub start_notsolved {
1.326     albertel 1862:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1863:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1864: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1865: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1866: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1867: 	if ($gradestatus =~ /^correct/ &&
                   1868: 	    &Apache::response::show_answer()) {
1.159     albertel 1869: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1870: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1871: 	}
1.24      albertel 1872:     }
1.159     albertel 1873:     return '';
1.24      albertel 1874: }
                   1875: 
1.25      albertel 1876: sub end_notsolved {
1.159     albertel 1877:     return '';
1.24      albertel 1878: }
                   1879: 
                   1880: sub start_solved {
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' ||
                   1883: 	$target eq 'tex') {
                   1884: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1885: 	if ($gradestatus !~ /^correct/ ||
                   1886: 	    !&Apache::response::show_answer()) {
1.326     albertel 1887: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1888: 	}
1.24      albertel 1889:     }
1.159     albertel 1890:     return '';
1.24      albertel 1891: }
                   1892: 
                   1893: sub end_solved {
1.248     albertel 1894:     return '';
                   1895: }
                   1896: 
                   1897: sub start_problemtype {
1.326     albertel 1898:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1899:     my $result;
1.339     albertel 1900:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1901: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1902: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1903: 	if (!defined($mode)) { $mode='show'; }
                   1904: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1905: 	my $found=0;
                   1906: 	foreach my $type (split(',',$for)) {
                   1907: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1908: 	}
                   1909: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1910: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1911: 	}
                   1912: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1913: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1914: 	}
                   1915:     } elsif ($target eq 'edit') {
                   1916: 	$result .=&Apache::edit::tag_start($target,$token);
                   1917: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1918: 					   [['show','Show'],
                   1919: 					    ['hide','Hide']]
                   1920: 					   ,$token);
                   1921: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1922: 					     [ ['exam','Exam/Quiz Problem'],
                   1923: 					       ['survey','Survey'],
1.428     raeburn  1924: 					       ['problem','Homework Problem'],
                   1925:                                                ['practice','Practice Problem'] ]
1.248     albertel 1926: 					     ,$token);
                   1927: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1928:     } elsif ($target eq 'modified') {
                   1929: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1930: 						     $safeeval,'mode','for');
                   1931: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1932:     }
                   1933:     return $result;
                   1934: }
                   1935: 
                   1936: sub end_problemtype {
1.159     albertel 1937:     return '';
1.24      albertel 1938: }
1.34      albertel 1939: 
                   1940: sub start_startouttext {
1.159     albertel 1941:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1942:     my @result=(''.'');
                   1943:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 1944:     
                   1945:     my $nesting = 
                   1946: 	&Apache::lonxml::set_state('outtext',
                   1947: 				   &Apache::lonxml::get_state('outtext')+1);
                   1948:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   1949: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   1950:     }
1.159     albertel 1951:     return (@result);
1.34      albertel 1952: }
1.159     albertel 1953: 
1.34      albertel 1954: sub end_startouttext {
1.326     albertel 1955:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1956:     my $result='';
                   1957:     my $text='';
                   1958:     if ($target eq 'edit') {
1.424     foxr     1959: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 1960: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437     raeburn  1961: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
1.438     bisitz   1962:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  1963:                  .&Apache::edit::deletelist($target,$token)
                   1964:                  .'</span></td>';
1.425     raeburn  1965:         unless ($env{'environment.wysiwygeditor'} eq 'on') {
1.434     foxr     1966: 	    $result .= '<td align="left">'
                   1967: 		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   1968: 		.'</td>'
                   1969: 		.'<td>'
                   1970: 		.&Apache::edit::insertlist($target,$token)
                   1971: 		.'</td>';
                   1972: 	}
1.425     raeburn  1973: 	$result.='<td align="right" valign="top">' .
1.434     foxr     1974: 	    &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1975: 		 &Apache::edit::end_row().
1.362     albertel 1976:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1977: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1978:     }
                   1979:     if ($target eq 'modified') {
1.219     albertel 1980: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1981:     }
                   1982:     if ($target eq 'tex') {
                   1983: 	$result .= '\noindent ';
                   1984:     }
                   1985:     return $result;
1.34      albertel 1986: }
1.159     albertel 1987: 
1.34      albertel 1988: sub start_endouttext {
1.159     albertel 1989:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1990:     my $result='';
                   1991:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1992:     if ($target eq "modified") {
                   1993: 	$result='<endouttext />'.
1.377     albertel 1994: 	    &Apache::edit::handle_insertafter('startouttext');
                   1995:     }
1.404     albertel 1996: 
                   1997:     my $nesting = 
                   1998: 	&Apache::lonxml::set_state('outtext',
                   1999: 				   &Apache::lonxml::get_state('outtext')-1);
                   2000:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2001: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2002: 	&Apache::lonxml::set_state('outtext', 0);
                   2003:     }
1.159     albertel 2004:     return $result;
1.34      albertel 2005: }
1.159     albertel 2006: 
1.34      albertel 2007: sub end_endouttext {
1.159     albertel 2008:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2009:     my @result=('','');
                   2010:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2011:     return (@result);
1.34      albertel 2012: }
1.159     albertel 2013: 
1.45      albertel 2014: sub delete_startouttext {
1.326     albertel 2015:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2016:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2017:     my $text=$$parser['-1']->get_text("/endouttext");
                   2018:     my $ntoken=$$parser['-1']->get_token();
                   2019:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2020:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2021:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2022:     # they did the last time round
                   2023:     &Apache::lonxml::increasedepth($ntoken);
                   2024:     &Apache::lonxml::decreasedepth($ntoken);
                   2025:     return 1;
1.193     www      2026: }
                   2027: 
                   2028: sub start_simpleeditbutton {
                   2029:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2030:     my $result='';
1.284     albertel 2031:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2032: 	($target eq 'web') &&
1.330     albertel 2033:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2034:         my $url=$env{'request.noversionuri'};
1.193     www      2035:         $url=~s/\?.*$//;
1.367     albertel 2036: 	my ($symb) = &Apache::lonnet::whichuser();
1.442   ! bisitz   2037: #       Warning make more sense and is more important on edit screen
        !          2038: #       $result='<p class="LC_warning">'
        !          2039: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
        !          2040: #              .&Apache::loncommon::help_open_topic('Caching')
        !          2041: #              .'</p>';
        !          2042:         $result.=&Apache::lontemplate::start_functionslist()
        !          2043:                 .&Apache::lontemplate::item_functionslist(
        !          2044:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'.&mt('Edit').'</a>')
        !          2045:                 .&Apache::lontemplate::end_functionslist();
        !          2046: 
1.193     www      2047:     }
                   2048:     return $result;
                   2049: }
                   2050: 
                   2051: sub end_simpleeditbutton {
                   2052:     return '';
1.45      albertel 2053: }
1.34      albertel 2054: 
1.428     raeburn  2055: sub practice_problem_header {
                   2056:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2057:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2058:            '</span>';
                   2059: }
                   2060: 
1.1       albertel 2061: 1;
                   2062: __END__
1.435     jms      2063: 
                   2064: =pod
                   2065: 
                   2066: =back
                   2067: 
                   2068: =cut

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