Annotation of loncom/homework/structuretags.pm, revision 1.437

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.437   ! raeburn     4: # $Id: structuretags.pm,v 1.436 2008/11/28 14:37:01 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: 
1.406     albertel  426:     my $show_all= '<span class="LC_nobreak"><label><input type="checkbox" name="showallfoils" ';
                    427:     if (defined($env{'form.showallfoils'})) { $show_all.='checked="checked"'; }
                    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: 		$form_tag_start.=
1.300     albertel  907: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  908: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  909: 		    $form_tag_start.='checked="on"';
                    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: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  942: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  943: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  944: 		}
1.216     albertel  945: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       946: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  947: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  948: 		    $msg.=&checkout_msg();
1.252     albertel  949: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  950: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  951: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
                    952: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
1.159     albertel  953: 		}
                    954: 		$result.=$msg.'<br />';
                    955: 	    } elsif ($target eq 'tex') {
1.332     albertel  956: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    957: 		                    : '\begin{minipage}{\textwidth}';
                    958: 		$result.='\begin{document}\noindent \vskip 1 mm '.
                    959: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  960: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  961: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  962: 		} else {
1.211     albertel  963: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  964: 		}
                    965: 	    }
1.324     albertel  966: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  967: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    968: 						       $style);
1.324     albertel  969: 	    if ($target eq 'web') {
1.375     albertel  970: 		$result .= 
                    971: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  972: 	    } elsif ($target eq 'grade') {
                    973: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    974: 							'problem');
                    975: 	    }
1.159     albertel  976: 	} elsif ($target eq 'web') {
1.360     albertel  977: 	    if ($status eq 'CAN_ANSWER' 
                    978: 		&& $slot_name ne ''
                    979: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    980: 		# unproctored slot access, self checkin
                    981: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    982: 					      $slot_name);
                    983: 	    }
1.368     albertel  984: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  985: 	      '<input type="hidden" name="submitted" value="yes" />';
                    986: 	    # create a page header and exit
1.284     albertel  987: 	    if ($env{'request.state'} eq "construct") {
                    988: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn   989:                 if ($Apache::lonhomework::type eq 'practice') {
                    990:                     $result.= '<input type="submit" name="resetdata" '.
                    991:                               'value="'.&mt('New Problem Variation').'" />'.
                    992:                               &practice_problem_header().'<hr />';
                    993:                 }
1.227     albertel  994: 	    }
                    995: 	    # if we are viewing someone else preserve that info
1.284     albertel  996: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  997: 		foreach my $field ('symb','courseid','domain','username') {
                    998: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  999: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1000: 		}
                   1001: 	    }
                   1002: 	} elsif ($target eq 'tex') {
1.319     foxr     1003: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                   1004: 
1.99      sakharuk 1005: 	}
1.159     albertel 1006:     } elsif ($target eq 'edit') {
1.343     albertel 1007: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1008: 	$Apache::lonxml::warnings_error_header=
                   1009: 	    &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 1010: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1011: 	$result.=$temp;
                   1012:     } elsif ($target eq 'modified') {
                   1013: 	$result=$token->[4];
                   1014:     } else {
                   1015: 	# page_start returned a starting result, delete it if we don't need it
                   1016: 	$result = '';
1.99      sakharuk 1017:     }
1.159     albertel 1018:     return $result;
1.9       albertel 1019: }
                   1020: 
                   1021: sub end_problem {
1.159     albertel 1022:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1023:     my $result;
1.310     foxr     1024: 
1.321     albertel 1025:     if (!$Apache::lonxml::metamode) {
                   1026: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1027: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1028:     }
1.319     foxr     1029: 
                   1030:     if ($target eq 'tex') {
1.321     albertel 1031: 	# Figure out the front matter and replace the
                   1032: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1033: 	# this in end_problem because whether or not we display due
                   1034: 	# dates depends on whether due dates have already been
                   1035: 	# displayed in the problem parts.
                   1036: 
1.319     foxr     1037: 	my $frontmatter   = '';
                   1038: 	my $startminipage = '';
                   1039: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1040: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1041: 	}
                   1042: 	my $id = $Apache::inputtags::part;
                   1043: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1044: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1045: 	my @packages = split /,/,$packages;
                   1046: 	my $allow_print_points = 0;
                   1047: 	foreach my $partial_key (@packages) {
                   1048: 	    if ($partial_key=~m/^part_0$/) {
                   1049: 		$allow_print_points=1;
                   1050: 	    }
                   1051: 	}
                   1052: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1053: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1054: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1055: 			'.disableexampointprint'}) eq 'yes') {
                   1056: 	    $allow_print_points=0;
                   1057: 	}
                   1058: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                   1059: 	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 ';
                   1060: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1061: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1062: 	
                   1063: 	#  Figure out what the due date is and if we need to print
                   1064: 	#  it in the problem header.  We have been logging the
                   1065: 	#  last due date written to file. 
                   1066: 	
                   1067: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                   1068: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                   1069: 	my $temp_file;
                   1070: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1071: 	
                   1072: 	# Figure out what the last printed due date is or set it
                   1073: 	# to the epoch if no duedates have been printed.
                   1074: 	
                   1075: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1076: 	if (-e $filename) {
                   1077: 	    $temp_file = Apache::File->new($filename);
                   1078: 	    my @due_file      = <$temp_file>;
                   1079: 	    $due_file_content = $due_file[$#due_file];
                   1080: 	    chomp $due_file_content;
                   1081: 	} 
                   1082: 	
                   1083: 	# We display the due date iff it is not the same as the last
                   1084: 	# duedate in problem header ($due_file_content), and
                   1085: 	# none of our parts displayed a duedate.
                   1086: 	#
                   1087: 	my $parts_with_displayduedate;
                   1088: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1089: 	    $parts_with_displayduedate = 
                   1090: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1091: 	} else {
                   1092: 	    $parts_with_displayduedate = 0;
                   1093: 	}
                   1094: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1095: 	    $temp_file = Apache::File->new('>'.$filename);
                   1096: 	    print $temp_file "$duetime\n";
                   1097: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1098: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1099: 		    $frontmatter .= $begin_doc.
                   1100: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                   1101: 		} else {
                   1102: 		    $frontmatter.= $begin_doc.$toc_line;
                   1103: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1104: 		}
                   1105: 	    } else {
1.381     albertel 1106: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'.$startminipage;
1.319     foxr     1107: 	    }
                   1108: 	} else {
                   1109: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1110: 		$frontmatter .= $begin_doc.$toc_line;
                   1111: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1112: 	    } else {
1.381     albertel 1113: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1114: 	    }
                   1115: 	}
                   1116: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1117:     }
                   1118: 
1.159     albertel 1119:     my $status=$Apache::inputtags::status['-1'];
                   1120:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1121: 	$target eq 'tex') {
1.249     albertel 1122: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1123: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1124: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1125: 		&Apache::inputtags::grade;
1.324     albertel 1126: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1127: 		# no need to grade, and don't want to hide data
1.249     albertel 1128: 	    } else {
                   1129: 		# move any submission data to .hidden
                   1130: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1131: 	    }
1.159     albertel 1132: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1133: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1134: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1135: 	    # if part is zero, no <part>s existed, so we need show the current
                   1136: 	    # grading status
                   1137: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1138: 	    $result.= $gradestatus;
                   1139: 	}
                   1140: 	if (
1.284     albertel 1141: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1142: 	    ($target eq 'answer') || ($target eq 'tex')
                   1143: 	   ) {
1.227     albertel 1144: 	    if ($target ne 'tex' &&
1.284     albertel 1145: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1146: 		$result.="</form>";
1.348     albertel 1147: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel 1148: 	    }
                   1149: 	    if ($target eq 'web') {
1.346     albertel 1150: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1151: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1152: 		my $endminipage = '';
1.284     albertel 1153: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1154: 		    $endminipage = '\end{minipage}';
                   1155: 		}
1.284     albertel 1156:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1157: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1158: 		} else {
1.262     sakharuk 1159: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1160: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1161: 			$result .= $endminipage.'\end{document} ';
                   1162: 		    } else {
1.382     albertel 1163: 			$result .= $endminipage;
1.262     sakharuk 1164: 		    }
1.159     albertel 1165: 		}
                   1166: 	    }
                   1167: 	}
                   1168: 	if ($target eq 'grade') {
                   1169: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1170: 	    &finalize_storage();
                   1171: 	}
1.284     albertel 1172: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1173: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1174: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1175: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1176: 	                        # we always show answer mode too.
1.159     albertel 1177: 	}
                   1178:     } elsif ($target eq 'meta') {
                   1179: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1180: 	    @Apache::inputtags::response=();
1.159     albertel 1181: 	    $result=&Apache::response::mandatory_part_meta;
                   1182: 	}
1.215     albertel 1183: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1184: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1185:     } elsif ($target eq 'edit') {
                   1186: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1187: 	$result .= &problem_edit_footer();
1.320     albertel 1188:     } elsif ($target eq 'modified') {
                   1189: 	 $result .= $token->[2];
1.159     albertel 1190:     }
1.155     albertel 1191: 
1.284     albertel 1192:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1193: 	&Apache::inputtags::check_for_duplicate_ids();
                   1194:     }
1.204     albertel 1195: 
                   1196:     &reset_problem_globals('problem');
1.159     albertel 1197: 
                   1198:     return $result;
1.48      albertel 1199: }
                   1200: 
1.108     albertel 1201: 
1.48      albertel 1202: sub start_library {
1.159     albertel 1203:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1204:     my ($result,$form_tag_start);
1.371     albertel 1205:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1206: 	&init_problem_globals('library');
                   1207: 	$Apache::lonhomework::type='problem';
                   1208:     }
1.159     albertel 1209:     if ($target eq 'edit') {
1.343     albertel 1210: 	($result,$form_tag_start)=
                   1211: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1212: 			'Edit');
                   1213: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1214: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1215: 	$result.=$temp;
                   1216:     } elsif ($target eq 'modified') {
                   1217: 	$result=$token->[4];
1.340     albertel 1218:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1219: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1220: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1221: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1222: 	($result,$form_tag_start)=
                   1223: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1224: 			$name);
1.159     albertel 1225: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1226: 	$result.=" \n $form_tag_start".	
1.159     albertel 1227: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1228: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1229:         if ($Apache::lonhomework::type eq 'practice') {
                   1230:             $result.= '<input type="submit" name="resetdata" '.
                   1231:                       'value="'.&mt('New Problem Variation').'" />'.
                   1232:                       &practice_problem_header().'<hr />';
                   1233:         }
1.159     albertel 1234:     }
                   1235:     return $result;
1.48      albertel 1236: }
                   1237: 
                   1238: sub end_library {
1.159     albertel 1239:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1240:     my $result='';
                   1241:     if ($target eq 'edit') {
                   1242: 	$result=&problem_edit_footer();
1.371     albertel 1243:     } elsif ($target eq 'web' 
                   1244: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1245: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1246: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1247:     }
1.371     albertel 1248:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1249: 	&reset_problem_globals('library');
                   1250:     }
1.159     albertel 1251:     return $result;
1.197     www      1252: }
                   1253: 
                   1254: sub start_definetag {
1.326     albertel 1255:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1256: 
                   1257:     my $result;
                   1258: 
                   1259:     my $name = $token->[2]->{'name'};
1.326     albertel 1260:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1261:     if ($target eq 'web') {
                   1262: 	if ($name=~/^\//) {
                   1263: 	    $result=
                   1264: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1265: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1266: 	} else {
                   1267: 	    $result=
                   1268: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1269: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1270: 	}
                   1271: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1272: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1273:     }
                   1274:     return $result;
                   1275: }
                   1276: 
                   1277: sub end_definetag {
                   1278:     return '';
1.1       albertel 1279: }
                   1280: 
                   1281: sub start_block {
1.201     albertel 1282:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1283: 
                   1284:     my $result;
1.1       albertel 1285: 
1.339     albertel 1286:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1287: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1288: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1289: 	if (defined($code) && $code ne '') {
1.137     albertel 1290: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1291: 		&Apache::lonxml::default_homework_load($safeeval);
                   1292: 	    }
1.131     albertel 1293: 	    $result = &Apache::run::run($code,$safeeval);
                   1294: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1295: 	} else {
                   1296: 	    $result='1';
                   1297: 	}
                   1298: 	if ( ! $result ) {
1.201     albertel 1299: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1300: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1301: 	}
                   1302: 	$result='';
                   1303:     } elsif ($target eq 'edit') {
                   1304: 	$result .=&Apache::edit::tag_start($target,$token);
                   1305: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1306: 					  $token,40);
                   1307: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1308:     } elsif ($target eq 'modified') {
                   1309: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1310: 						     $safeeval,'condition');
                   1311: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1312:     }
1.131     albertel 1313:     return $result;
1.1       albertel 1314: }
                   1315: 
                   1316: sub end_block {
1.167     www      1317:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1318:     my $result;
                   1319:     if ($target eq "edit") {
                   1320: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1321:     }
                   1322:     return $result;
                   1323: }
                   1324: 
                   1325: sub start_languageblock {
1.201     albertel 1326:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1327: 
                   1328:     my $result;
                   1329: 
1.339     albertel 1330:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1331: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1332: 	my $include = $token->[2]->{'include'};
                   1333: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1334:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.394     www      1335: # This should not even happen, since we should at least have the server language
1.398     www      1336:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1337: # Now loop over all languages in order of preference
                   1338:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1339: # If the languageblock has no arguments, show the contents
1.399     www      1340:            $result=1;
                   1341:            my $found=0;
1.394     www      1342: # Do we have an include argument?
1.398     www      1343: 	   if ($include) {
1.394     www      1344: # If include is specified, by default, don't render the block
1.399     www      1345:               $result=0;
1.398     www      1346:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1347: # ... but if my preferred language is included, render it
1.398     www      1348:                  if ($included_language eq $preferred_language) {
1.399     www      1349:                     $result=1; 
                   1350:                     $found=1; 
1.398     www      1351:                  }
                   1352:               }
                   1353: 	   }
1.394     www      1354: # Do we have an exclude argument?
1.398     www      1355:            if ($exclude) {
1.399     www      1356:               $result=1;
1.398     www      1357:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1358:                  if ($excluded_language eq $preferred_language) {
1.399     www      1359:                     $result=0;
                   1360:                     $found=1;
1.398     www      1361:                  }
                   1362:               }
                   1363: 	   }
1.399     www      1364:            if ($found) { last; }
1.398     www      1365:         }
1.201     albertel 1366: 	if ( ! $result ) {
                   1367: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1368: 						   $style);
                   1369: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1370: 	}
                   1371: 	$result='';
1.167     www      1372:     } elsif ($target eq 'edit') {
                   1373: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1374: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1375: 					  $token,40);
1.211     albertel 1376: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1377: 					  $token,40);
                   1378: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1379:     } elsif ($target eq 'modified') {
                   1380: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1381: 						     $safeeval,'include',
                   1382: 						     'exclude');
1.167     www      1383: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1384:     }
                   1385:     return $result;
                   1386: }
                   1387: 
                   1388: sub end_languageblock {
1.170     www      1389:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1390:     my $result;
1.201     albertel 1391:     if ($target eq "edit") {
1.170     www      1392: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1393:     }
                   1394:     return $result;
                   1395: }
                   1396: 
1.397     albertel 1397: {
                   1398:     my %available_texts;
                   1399:     sub start_translated {
                   1400: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1401: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1402: 	undef(%available_texts);
                   1403:     }
                   1404:     
                   1405:     sub end_translated {
                   1406: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1407: 	my $result;
                   1408: 	#show the translation on viewable targets
                   1409: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1410: 	    # or non-viewable targets, if it's embedded in something that
                   1411: 	    # wants the output
                   1412: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1413: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1414: 	    my @possibilities = keys(%available_texts);
                   1415: 	    my $which = 
                   1416: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1417: 	    $result = $available_texts{$which};
                   1418: 	}
                   1419: 	undef(%available_texts);
                   1420: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1421: 	return $result;
                   1422:     }
                   1423: 
                   1424: 
                   1425:     sub start_lang {
                   1426: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1427: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1428: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1429: 	    &Apache::lonxml::startredirection();
                   1430: 	}
                   1431: 	return '';
                   1432:     }
                   1433: 
                   1434:     sub end_lang {
                   1435: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1436: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1437: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1438: 	    my $result = &Apache::lonxml::endredirection();
                   1439: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1440: 						   $safeeval);
1.431     raeburn  1441:             if ($which=~/\w/) {
                   1442:                 $available_texts{$which} = $result;
                   1443:             }
                   1444:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1445:                                                         $safeeval);
                   1446:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1447:                 if ($language=~/\w/) {
                   1448:                     $available_texts{$language} = $result;
                   1449:                 }
1.427     bisitz   1450:             }
                   1451: 
1.397     albertel 1452: 	}
                   1453: 	return '';
                   1454:     }
                   1455: }
                   1456: 
1.170     www      1457: sub start_instructorcomment {
1.201     albertel 1458:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1459: 
                   1460:     my $result;
                   1461: 
1.339     albertel 1462:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1463: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1464:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1465: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1466: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1467: 						   $parser,$style);
1.170     www      1468: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1469: 	}
                   1470: 	$result='';
                   1471:     } elsif ($target eq 'edit') {
                   1472: 	$result .=&Apache::edit::tag_start($target,$token);
                   1473: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1474:     }
                   1475:     return $result;
                   1476: }
                   1477: 
                   1478: sub end_instructorcomment {
1.159     albertel 1479:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1480:     my $result;
                   1481:     if ($target eq "edit") {
                   1482: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1483:     }
                   1484:     return $result;
1.4       tsai     1485: }
                   1486: 
                   1487: sub start_while {
1.326     albertel 1488:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1489: 
1.160     albertel 1490:     my $result;
1.339     albertel 1491:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1492: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1493: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1494: 
1.160     albertel 1495: 	push( @Apache::structuretags::whileconds, $code);
                   1496: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1497: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1498: 	}
                   1499: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1500: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1501: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1502: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1503: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1504: 	if ( $result ) {
                   1505: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1506: 	}
                   1507:     } elsif ($target eq 'edit') {
                   1508: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1509: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1510: 					  $token,40);
                   1511: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1512:     } elsif ($target eq 'modified') {
                   1513: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1514: 						     $safeeval,'condition');
                   1515: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1516:     }
1.160     albertel 1517:     return $result;
1.4       tsai     1518: }
                   1519: 
                   1520: sub end_while {
1.159     albertel 1521:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1522:     my $result;
                   1523: 
1.339     albertel 1524:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1525: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1526: 	my $code = pop(@Apache::structuretags::whileconds);
                   1527: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1528: 	my $line = pop(@Apache::structuretags::whileline);
                   1529: 	my $return = &Apache::run::run($code,$safeeval);
                   1530: 	my $starttime=time;
                   1531: 	my $error=0;
                   1532: 	while ($return) {
                   1533: 	    if (time-$starttime >
                   1534: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1535: 		$return = 0; $error=1; next;
1.161     albertel 1536: 	    }
                   1537: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1538: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1539: 		$target eq 'analyze') {
                   1540: 		# grade/answer/analyze should produce no output but if we
                   1541: 		# are redirecting, the redirecter should know what to do
                   1542: 		# with the output
                   1543: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1544: 	    }
1.161     albertel 1545: 	    $return = &Apache::run::run($code,$safeeval);
                   1546: 	}
                   1547: 	if ($error) {
1.430     bisitz   1548: 	    &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 1549: 	}
                   1550:     } elsif ($target eq "edit") {
                   1551: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1552:     }
1.160     albertel 1553:     return $result;
1.1       albertel 1554: }
1.6       tsai     1555: 
1.160     albertel 1556: # <randomlist show="1">
1.6       tsai     1557: #  <tag1>..</tag1>
                   1558: #  <tag2>..</tag2>
                   1559: #  <tag3>..</tag3>
1.160     albertel 1560: #  ...
1.6       tsai     1561: # </randomlist>
                   1562: sub start_randomlist {
1.326     albertel 1563:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1564:     my $result;
1.339     albertel 1565:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1566: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1567: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1568: 	my $b_parser= HTML::LCParser->new(\$body);
                   1569: 	$b_parser->xml_mode(1);
                   1570: 	$b_parser->marked_sections(1);
1.159     albertel 1571: 	my $b_tok;
                   1572: 	my @randomlist;
                   1573: 	my $list_item;
                   1574: 	while($b_tok = $b_parser->get_token() ) {
                   1575: 	    if($b_tok->[0] eq 'S') { # start tag
                   1576: 		# get content of the tag until matching end tag
                   1577: 		# get all text upto the matching tag
                   1578: 		# and push the content into @randomlist
                   1579: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1580: 							   $b_parser);
                   1581: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1582: 		push(@randomlist,$list_item);
                   1583: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1584:                 #         $list_item</b>";
                   1585: 	    }
                   1586: 	    if($b_tok->[0] eq 'T') { # text
                   1587: 		# what to do with text in between tags?
                   1588: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1589: 	    }
                   1590: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1591: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1592: 	    # }
                   1593: 	}
1.303     albertel 1594: 	if (@randomlist) {
                   1595: 	    my @idx_arr = (0 .. $#randomlist);
                   1596: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1597: 	    my $bodytext = '';
                   1598: 	    my $show=$#randomlist;
                   1599: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1600: 	    $showarg--;
                   1601: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1602: 	    for(0 .. $show) {
                   1603: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1604: 	    }
                   1605: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1606: 	}
                   1607:     } elsif ($target eq 'edit' ) {
                   1608: 	$result .=&Apache::edit::tag_start($target,$token);
                   1609: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1610: 					   $token,5);
                   1611: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1612:     } elsif ($target eq 'modified' ) {
                   1613: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1614: 						     $safeeval,'show');
                   1615: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1616:     }
                   1617:     return $result;
1.7       tsai     1618: }
                   1619: 
                   1620: sub shuffle {
                   1621:     my $a=shift;
                   1622:     my $i;
1.303     albertel 1623:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1624: 	&Apache::response::pushrandomnumber();
1.159     albertel 1625: 	for($i=@$a;--$i;) {
                   1626: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1627: 	    next if $i == $j;
                   1628: 	    @$a[$i,$j] = @$a[$j,$i];
                   1629: 	}
1.251     albertel 1630: 	&Apache::response::poprandomnumber();
1.7       tsai     1631:     }
1.6       tsai     1632: }
                   1633: 
                   1634: sub end_randomlist {
1.159     albertel 1635:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1636:     my $result;
                   1637:     if ($target eq 'edit' ) {
                   1638: 	$result=&Apache::edit::tag_end($target,$token,
                   1639: 				       'End Randomly Parsed Block');
                   1640:     }
                   1641:     return $result;
1.6       tsai     1642: }
                   1643: 
1.283     albertel 1644: sub ordered_show_check {
                   1645:     my $last_part=$Apache::inputtags::partlist[-2];
                   1646:     my $in_order=
                   1647: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1648:     my $in_order_show=1;
                   1649:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1650: 	$in_order_show=&Apache::response::check_status($last_part);
                   1651:     }
                   1652:     return $in_order_show;
                   1653: }
                   1654: 
1.11      albertel 1655: sub start_part {
1.326     albertel 1656:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1657:     if (!$Apache::lonxml::metamode) {
                   1658: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1659: 	                                     # duedates.
                   1660:     }
1.159     albertel 1661:     my $result='';
1.386     albertel 1662:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1663:     $Apache::inputtags::part=$id;
1.177     albertel 1664:     push(@Apache::inputtags::partlist,$id);
                   1665:     @Apache::inputtags::response=();
1.159     albertel 1666:     @Apache::inputtags::previous=();
                   1667:     @Apache::inputtags::previous_version=();
1.405     albertel 1668:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1669:     &Apache::response::reset_params();
                   1670: 
1.159     albertel 1671:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1672:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1673:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1674:     my $in_order_show=&ordered_show_check();
1.214     albertel 1675:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1676:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1677:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1678: 
                   1679:     if ($target eq 'meta') {
1.224     www      1680: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1681: 	return &Apache::response::mandatory_part_meta.
                   1682: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1683:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1684: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1685: 	if ($hidden || !$in_order_show) {
1.326     albertel 1686: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1687: 	} else {
                   1688: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1689: 	    push (@Apache::inputtags::status,$status);
                   1690: 	    my $expression='$external::datestatus="'.$status.'";';
                   1691: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1692: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1693: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1694: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1695: 	    }
1.216     albertel 1696: 	    if (( $status eq 'CLOSED' ) ||
                   1697: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1698: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1699: 		( $status eq 'BANNED') ||
                   1700: 		( $status eq 'UNAVAILABLE') ||
                   1701: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1702: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1703: 							   $style);
1.159     albertel 1704: 		if ( $target eq "web" ) {
1.211     albertel 1705: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1706: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1707: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1708: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1709: 		    } else {
1.211     albertel 1710: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1711: 		    }
1.159     albertel 1712: 		}
                   1713: 	    } else {
                   1714: 		if ($target eq 'tex') {
1.284     albertel 1715: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1716: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1717: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1718: 			} else {
                   1719: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1720: 			}
1.195     sakharuk 1721: 		    }
1.159     albertel 1722: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1723: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1724: 		    my @allkeys = split /,/,$allkeys;
                   1725: 		    my $allow_print_points = 0;
                   1726: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1727: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1728: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1729: 			}
                   1730: 		    }
1.275     albertel 1731: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1732: 		    if (defined($maxtries) && $maxtries < 0) {
                   1733: 			$allow_print_points=0;
                   1734: 		    }
1.302     albertel 1735: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1736: 				    '.disableexampointprint'}) eq 'yes') {
                   1737: 			$allow_print_points=0;
                   1738: 		    }
1.222     sakharuk 1739: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1740: 		} elsif ($target eq 'web') {
1.356     www      1741: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1742: 		}
                   1743: 	    }
                   1744: 	}
                   1745:     } elsif ($target eq 'edit') {
                   1746: 	$result.=&Apache::edit::tag_start($target,$token);
                   1747: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1748: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1749: 	    '&nbsp;&nbsp;'.
                   1750: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1751: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1752:     } elsif ($target eq 'modified') {
                   1753: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1754: 						     $safeeval,'id','display');
1.159     albertel 1755: 	if ($constructtag) {
1.225     albertel 1756: 	    #limiting ids to only letters numbers, and space
1.224     www      1757: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1758: 	    $result = &Apache::edit::rebuild_tag($token);
                   1759: 	}
                   1760:     }
                   1761:     return $result;
1.11      albertel 1762: }
                   1763: 
                   1764: sub end_part {
1.159     albertel 1765:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1766:     &Apache::lonxml::debug("in end_part $target ");
                   1767:     my $status=$Apache::inputtags::status['-1'];
                   1768:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1769:     my $in_order_show=&ordered_show_check();
1.321     albertel 1770:     my $result;
                   1771:     if (!$Apache::lonxml::metamode) {
                   1772: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1773: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1774:     }
1.312     albertel 1775:     if ($target eq 'grade') {
1.249     albertel 1776: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1777: 	    !$hidden && $in_order_show) {
1.311     foxr     1778: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1779: 	} else {
                   1780: 	    # move any submission data to .hidden
                   1781: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1782: 	}
1.283     albertel 1783:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1784: 	     !$hidden && $in_order_show) {
1.159     albertel 1785: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1786: 							$target);
1.212     albertel 1787: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1788: 	    $gradestatus='';
                   1789: 	}
1.311     foxr     1790: 	$result.=$gradestatus;
1.265     sakharuk 1791: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1792:     } elsif ($target eq 'edit') {
1.311     foxr     1793: 	$result.=&Apache::edit::end_table();
1.322     albertel 1794:     } elsif ($target eq 'modified') {
                   1795: 	 $result .= $token->[2];
1.159     albertel 1796:     }
                   1797:     pop @Apache::inputtags::status;
                   1798:     $Apache::inputtags::part='';
1.295     albertel 1799:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1800:     return $result;
1.11      albertel 1801: }
1.1       albertel 1802: 
1.25      albertel 1803: sub start_preduedate {
1.326     albertel 1804:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1805:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1806: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1807: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1808: 	if (!$Apache::lonhomework::scantronmode &&
                   1809: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1810: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1811: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1812: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1813: 	}
1.24      albertel 1814:     }
1.159     albertel 1815:     return '';
1.24      albertel 1816: }
                   1817: 
1.25      albertel 1818: sub end_preduedate {
1.159     albertel 1819:     return '';
1.24      albertel 1820: }
                   1821: 
1.369     foxr     1822: # In all the modes where <postanswerdate> text is 
                   1823: # displayable,  all we do is eat up the text between the start/stop
                   1824: # tags if the conditions are not right to display it.
1.25      albertel 1825: sub start_postanswerdate {
1.326     albertel 1826:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1827:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1828: 	&Apache::lonnet::allowed('pav',
                   1829: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1830:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1831: 	$target eq 'tex' ) {
1.300     albertel 1832: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1833: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1834: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1835: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1836: 	}
                   1837:     }
                   1838:     return '';
1.24      albertel 1839: }
                   1840: 
1.25      albertel 1841: sub end_postanswerdate {
1.159     albertel 1842:     return '';
1.24      albertel 1843: }
                   1844: 
1.25      albertel 1845: sub start_notsolved {
1.326     albertel 1846:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1847:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1848: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1849: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1850: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1851: 	if ($gradestatus =~ /^correct/ &&
                   1852: 	    &Apache::response::show_answer()) {
1.159     albertel 1853: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1854: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1855: 	}
1.24      albertel 1856:     }
1.159     albertel 1857:     return '';
1.24      albertel 1858: }
                   1859: 
1.25      albertel 1860: sub end_notsolved {
1.159     albertel 1861:     return '';
1.24      albertel 1862: }
                   1863: 
                   1864: sub start_solved {
1.326     albertel 1865:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1866:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1867: 	$target eq 'tex') {
                   1868: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1869: 	if ($gradestatus !~ /^correct/ ||
                   1870: 	    !&Apache::response::show_answer()) {
1.326     albertel 1871: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1872: 	}
1.24      albertel 1873:     }
1.159     albertel 1874:     return '';
1.24      albertel 1875: }
                   1876: 
                   1877: sub end_solved {
1.248     albertel 1878:     return '';
                   1879: }
                   1880: 
                   1881: sub start_problemtype {
1.326     albertel 1882:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1883:     my $result;
1.339     albertel 1884:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1885: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1886: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1887: 	if (!defined($mode)) { $mode='show'; }
                   1888: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1889: 	my $found=0;
                   1890: 	foreach my $type (split(',',$for)) {
                   1891: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1892: 	}
                   1893: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1894: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1895: 	}
                   1896: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1897: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1898: 	}
                   1899:     } elsif ($target eq 'edit') {
                   1900: 	$result .=&Apache::edit::tag_start($target,$token);
                   1901: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1902: 					   [['show','Show'],
                   1903: 					    ['hide','Hide']]
                   1904: 					   ,$token);
                   1905: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1906: 					     [ ['exam','Exam/Quiz Problem'],
                   1907: 					       ['survey','Survey'],
1.428     raeburn  1908: 					       ['problem','Homework Problem'],
                   1909:                                                ['practice','Practice Problem'] ]
1.248     albertel 1910: 					     ,$token);
                   1911: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1912:     } elsif ($target eq 'modified') {
                   1913: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1914: 						     $safeeval,'mode','for');
                   1915: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1916:     }
                   1917:     return $result;
                   1918: }
                   1919: 
                   1920: sub end_problemtype {
1.159     albertel 1921:     return '';
1.24      albertel 1922: }
1.34      albertel 1923: 
                   1924: sub start_startouttext {
1.159     albertel 1925:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1926:     my @result=(''.'');
                   1927:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 1928:     
                   1929:     my $nesting = 
                   1930: 	&Apache::lonxml::set_state('outtext',
                   1931: 				   &Apache::lonxml::get_state('outtext')+1);
                   1932:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   1933: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   1934:     }
1.159     albertel 1935:     return (@result);
1.34      albertel 1936: }
1.159     albertel 1937: 
1.34      albertel 1938: sub end_startouttext {
1.326     albertel 1939:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1940:     my $result='';
                   1941:     my $text='';
                   1942:     if ($target eq 'edit') {
1.424     foxr     1943: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 1944: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437   ! raeburn  1945: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
        !          1946:                  .'<td><span clas="LC_nobreak">'.&mt('Delete?').' '
        !          1947:                  .&Apache::edit::deletelist($target,$token)
        !          1948:                  .'</span></td>';
1.425     raeburn  1949:         unless ($env{'environment.wysiwygeditor'} eq 'on') {
1.434     foxr     1950: 	    $result .= '<td align="left">'
                   1951: 		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   1952: 		.'</td>'
                   1953: 		.'<td>'
                   1954: 		.&Apache::edit::insertlist($target,$token)
                   1955: 		.'</td>';
                   1956: 	}
1.425     raeburn  1957: 	$result.='<td align="right" valign="top">' .
1.434     foxr     1958: 	    &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1959: 		 &Apache::edit::end_row().
1.362     albertel 1960:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1961: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1962:     }
                   1963:     if ($target eq 'modified') {
1.219     albertel 1964: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1965:     }
                   1966:     if ($target eq 'tex') {
                   1967: 	$result .= '\noindent ';
                   1968:     }
                   1969:     return $result;
1.34      albertel 1970: }
1.159     albertel 1971: 
1.34      albertel 1972: sub start_endouttext {
1.159     albertel 1973:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1974:     my $result='';
                   1975:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1976:     if ($target eq "modified") {
                   1977: 	$result='<endouttext />'.
1.377     albertel 1978: 	    &Apache::edit::handle_insertafter('startouttext');
                   1979:     }
1.404     albertel 1980: 
                   1981:     my $nesting = 
                   1982: 	&Apache::lonxml::set_state('outtext',
                   1983: 				   &Apache::lonxml::get_state('outtext')-1);
                   1984:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   1985: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   1986: 	&Apache::lonxml::set_state('outtext', 0);
                   1987:     }
1.159     albertel 1988:     return $result;
1.34      albertel 1989: }
1.159     albertel 1990: 
1.34      albertel 1991: sub end_endouttext {
1.159     albertel 1992:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1993:     my @result=('','');
                   1994:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1995:     return (@result);
1.34      albertel 1996: }
1.159     albertel 1997: 
1.45      albertel 1998: sub delete_startouttext {
1.326     albertel 1999:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2000:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2001:     my $text=$$parser['-1']->get_text("/endouttext");
                   2002:     my $ntoken=$$parser['-1']->get_token();
                   2003:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2004:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2005:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2006:     # they did the last time round
                   2007:     &Apache::lonxml::increasedepth($ntoken);
                   2008:     &Apache::lonxml::decreasedepth($ntoken);
                   2009:     return 1;
1.193     www      2010: }
                   2011: 
                   2012: sub start_simpleeditbutton {
                   2013:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2014:     my $result='';
1.284     albertel 2015:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2016: 	($target eq 'web') &&
1.330     albertel 2017:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2018:         my $url=$env{'request.noversionuri'};
1.193     www      2019:         $url=~s/\?.*$//;
1.367     albertel 2020: 	my ($symb) = &Apache::lonnet::whichuser();
1.194     www      2021: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.356     www      2022:                 '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'.&mt('Edit').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
1.196     www      2023: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      2024:     }
                   2025:     return $result;
                   2026: }
                   2027: 
                   2028: sub end_simpleeditbutton {
                   2029:     return '';
1.45      albertel 2030: }
1.34      albertel 2031: 
1.428     raeburn  2032: sub practice_problem_header {
                   2033:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2034:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2035:            '</span>';
                   2036: }
                   2037: 
1.1       albertel 2038: 1;
                   2039: __END__
1.435     jms      2040: 
                   2041: =pod
                   2042: 
                   2043: =back
                   2044: 
                   2045: =cut

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