Annotation of loncom/homework/structuretags.pm, revision 1.404

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

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