Annotation of loncom/homework/structuretags.pm, revision 1.406

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.406   ! albertel    4: # $Id: structuretags.pm,v 1.405 2007/10/17 00:22:51 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)=@_;
1.406   ! albertel  335:     my $result .= '<div class="LC_edit_problem_header">';
        !           336: 
        !           337:     $result.='<div class="LC_edit_problem_header_edit_row">';
        !           338:     $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
1.373     albertel  339:     $result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
1.406   ! albertel  340:     $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />';
        !           341:     $result.='</div>';
        !           342: 
        !           343:     if (!$Apache::lonhomework::parsing_a_task) {
        !           344: 	$result .= 
        !           345: 	    '<div class="LC_edit_problem_header_title">'.
        !           346: 	    &mt('Problem Testing').
        !           347: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
        !           348: 	    '</div>';
        !           349:     } else {
        !           350: 	$result .= 
        !           351: 	    '<div class="LC_edit_problem_header_title">'.
        !           352: 	    &mt('Task Testing').
        !           353: 	    '</div>';
        !           354:     }
        !           355:     
1.315     albertel  356:     my $show_all_foils_text = 
                    357: 	($Apache::lonhomework::parsing_a_task) ?
                    358: 	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
                    359: 	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    360: 
1.406   ! albertel  361:     my $show_all= '<span class="LC_nobreak"><label><input type="checkbox" name="showallfoils" ';
        !           362:     if (defined($env{'form.showallfoils'})) { $show_all.='checked="checked"'; }
        !           363:     $show_all.= ' />'.$show_all_foils_text.'</label></span>';
        !           364: 
        !           365: 
1.384     albertel  366: 
1.406   ! albertel  367:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  368:     if (!$Apache::lonhomework::parsing_a_task) {
                    369: 	$result.="
1.406   ! albertel  370: <div class='LC_edit_problem_header_row1'>
        !           371: <span class=\"LC_nobreak\">
1.405     albertel  372: ".&mt("Problem Status:")."
1.235     albertel  373: <select name='problemstate'>
1.270     albertel  374:   <option value=''></option>
1.235     albertel  375:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    376:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    377:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    378:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    379:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    380: </select>
1.406   ! albertel  381: </span>
        !           382: <span class=\"LC_nobreak\">
1.405     albertel  383: ".&mt("Problem Type:")."
1.235     albertel  384: <select name='problemtype'>
1.270     albertel  385:   <option value=''></option>
1.242     albertel  386:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    387:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    388:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  389: </select>
1.406   ! albertel  390: </span>
        !           391: $show_all
        !           392: </div>
        !           393: <div class='LC_edit_problem_header_row2'>
        !           394: <span class=\"LC_nobreak\">
1.405     albertel  395: ".&mt("Feedback Mode:")."
1.235     albertel  396: <select name='problemstatus'>
                    397:   <option value=''></option>
1.242     albertel  398:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  399:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    400:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  401: </select>
1.406   ! albertel  402: </span>
        !           403: ";
        !           404: 
1.376     albertel  405:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    406: 	$result.="
1.406   ! albertel  407: <div class='LC_edit_problem_header_row1'>
        !           408: <span class=\"LC_nobreak\">
1.405     albertel  409: ".&mt("Problem Status:")."
1.376     albertel  410: <select name='problemstate'>
                    411:   <option value=''></option>
                    412:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    413:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    414:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    415:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    416: </select>
1.406   ! albertel  417: </span>
        !           418: $show_all
        !           419: ";
        !           420:     }
        !           421: 
        !           422:     $result.='
        !           423:        <span class="LC_nobreak">
        !           424:        '.&mt('Apply style file: ').'
        !           425:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
        !           426:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
        !           427:        </span>
        !           428:      </div>
        !           429:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
        !           430:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
        !           431:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
        !           432:    </div>
        !           433:    <hr class="LC_edit_problem_divide" />
        !           434:    <div class="LC_edit_problem_header_randomize_row">
        !           435:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
        !           436:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
        !           437:      <input type="text" name="rndseed" size="10" value="'.
        !           438: 	       $rndseed.'"
        !           439:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
        !           440: 
        !           441:     if (!$Apache::lonhomework::parsing_a_task) {
        !           442: 	my $numtoanalyze=$env{'form.numtoanalyze'};
        !           443: 	if (!$numtoanalyze) { $numtoanalyze=20; }
        !           444: 	$result .= &mt('[_1] for [_2] versions of this problem.',
        !           445: 		       '<input type="submit" name="problemmode" value='.&mt('"Calculate answers').'" />',
        !           446: 		       '<input type="text" name="numtoanalyze" value="'.
        !           447: 		       $numtoanalyze.'" size="5" />').
        !           448: 		       &Apache::loncommon::help_open_topic("Analyze_Problem",
        !           449: 							   '',undef,undef,300);
1.313     albertel  450:     }
1.406   ! albertel  451: 
        !           452:     $result.='
        !           453:    </div>
        !           454:    <hr class="LC_edit_problem_divide" />
        !           455: </div>';
1.159     albertel  456:     return $result;
1.48      albertel  457: }
                    458: 
1.65      albertel  459: sub initialize_storage {
1.357     albertel  460:     my ($given_symb) = @_;
1.353     albertel  461:     undef(%Apache::lonhomework::results);
                    462:     undef(%Apache::lonhomework::history);
1.357     albertel  463:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  464: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  465:     
                    466:     # anonymous users (CODEd exams) have no data
                    467:     if ($name eq 'anonymous' 
                    468: 	&& !defined($domain)) {
                    469: 	return;
                    470:     }
                    471: 
1.333     albertel  472:     if ($env{'request.state'} eq 'construct' 
                    473: 	|| $symb eq ''
                    474: 	|| $Apache::lonhomework::type eq 'practice') {
                    475: 	
                    476: 	my $namespace = $symb || $env{'request.uri'};
                    477: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  478: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    479: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  480: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    481: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    482: 	    &Apache::lonxml::debug("Attempt reset");
                    483: 	}
1.159     albertel  484: 	%Apache::lonhomework::history=
1.333     albertel  485: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  486: 	my ($temp)=keys %Apache::lonhomework::history ;
                    487: 	&Apache::lonxml::debug("Return message of $temp");
                    488:     } else {
                    489: 	%Apache::lonhomework::history=
                    490: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    491:     }
1.353     albertel  492: 
1.159     albertel  493:     #ignore error conditions
1.67      albertel  494:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  495:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  496: }
                    497: 
                    498: # -------------------------------------------------------------finalize_storage
                    499: # Stores away the result has to a student's environment
                    500: # checks form.grade_ for specific values, other wises stores
                    501: # to the running users environment
1.285     raeburn   502: # Will increment totals for attempts, students, and corrects
                    503: # if running user has student role.  
1.65      albertel  504: sub finalize_storage {
1.357     albertel  505:     my ($given_symb) = @_;
1.159     albertel  506:     my $result;
1.289     albertel  507:     if (%Apache::lonhomework::results) {
1.323     albertel  508: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    509: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  510: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  511: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  512: 	if ($env{'request.state'} eq 'construct' 
                    513: 	    || $symb eq ''
                    514: 	    || $Apache::lonhomework::type eq 'practice') {
                    515: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  516: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  517: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  518: 					      $namespace,'',$domain,$name);
1.159     albertel  519: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    520: 	} else {
                    521: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    522: 					    $symb,$courseid,$domain,$name);
                    523: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   524:             if ($env{'request.role'} =~/^st/) {
                    525:                 &store_aggregates($symb,$courseid);
                    526:             }
1.159     albertel  527: 	}
1.323     albertel  528:     } else {
                    529: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  530:     }
1.159     albertel  531:     return $result;
1.65      albertel  532: }
                    533: 
1.285     raeburn   534: # -------------------------------------------------------------store_aggregates
                    535: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    536: # for the course. Increments total number of attempts, unique students 
                    537: # and corrects for each part for an instance of a problem, as appropriate.
                    538: sub store_aggregates {
                    539:     my ($symb,$courseid) = @_;
1.286     albertel  540:     my %aggregate;
                    541:     my @parts;
1.288     albertel  542:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    543:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  544:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  545:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  546:             push(@parts, $1);
1.285     raeburn   547:         }
                    548:     }
1.286     albertel  549:     foreach my $part (@parts) {
                    550:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    551: 	    eq 'APPROX_ANS' ||
                    552: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    553: 	    eq 'EXACT_ANS') {
1.287     albertel  554:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   555:         }
1.286     albertel  556:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  557:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   558:         } else {
1.293     albertel  559:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   560:             if ($last_reset) {
1.293     albertel  561:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   562:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    563:                 }
                    564:             }
1.285     raeburn   565:         }
1.287     albertel  566:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   567:     }
1.292     raeburn   568:     if (keys (%aggregate) > 0) {
1.289     albertel  569: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   570:                             $cdomain,$cname);
                    571:     }
                    572: }
1.289     albertel  573: 
1.65      albertel  574: sub checkout_msg {
1.211     albertel  575:     my %lt=&Apache::lonlocal::texthash( 
                    576: 		'resource'=>'The resource needs to be checked out',
                    577: 		'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.',
                    578:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    579:                 'checkout'=>'Check out Exam for Viewing',
                    580: 		'checkout?'=>'Check out Exam?');
1.352     albertel  581:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  582:     return (<<ENDCHECKOUT);
1.211     albertel  583: <h2>$lt{'resource'}</h2>
                    584:     <p>$lt{'id_expln'}</p>
                    585: <font color="red">
                    586: <p>$lt{'warning'}</p>
1.91      albertel  587: </font>
1.352     albertel  588: <form name="checkout" method="POST" action="$uri">
1.91      albertel  589: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  590: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  591: </form>
                    592: ENDCHECKOUT
                    593: }
                    594: 
1.252     albertel  595: sub firstaccess_msg {
1.253     albertel  596:     my ($time,$symb)=@_;
                    597:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    598:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    599:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.352     albertel  600:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.252     albertel  601:     return (<<ENDCHECKOUT);
1.253     albertel  602: <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  603: <form name="markaccess" method="POST" action="$uri">
1.252     albertel  604: <input type="hidden" name="markaccess" value="yes" />
                    605: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    606: </form>
                    607: ENDCHECKOUT
                    608: }
                    609: 
1.204     albertel  610: sub init_problem_globals {
                    611:     my ($type)=@_;
                    612:     #initialize globals
1.308     foxr      613:     #   For problems, we start out in part 0 (outside a <part> tag).
                    614:     #   and part 0 is used to describe the main body of the <problem>
                    615:     #
1.204     albertel  616:     if ($type eq 'problem') {
                    617: 	$Apache::inputtags::part='0';
                    618: 	@Apache::inputtags::partlist=('0');
1.405     albertel  619: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel  620: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      621: 
1.266     albertel  622:     } elsif ($type eq 'library') {
1.204     albertel  623: 	$Apache::inputtags::part='';
                    624: 	@Apache::inputtags::partlist=();
1.405     albertel  625: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel  626: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      627: 
1.304     albertel  628:     } elsif ($type eq 'Task') {
                    629: 	$Apache::inputtags::part='0';
                    630: 	@Apache::inputtags::partlist=('0');
1.405     albertel  631: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel  632: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  633:     }
                    634:     @Apache::inputtags::responselist = ();
                    635:     @Apache::inputtags::importlist = ();
                    636:     @Apache::inputtags::previous=();
                    637:     @Apache::inputtags::previous_version=();
                    638:     $Apache::structuretags::printanswer='No';
                    639:     @Apache::structuretags::whileconds=();
                    640:     @Apache::structuretags::whilebody=();
                    641:     @Apache::structuretags::whileline=();
                    642:     $Apache::lonhomework::scantronmode=0;
                    643:     undef($Apache::lonhomework::name);
1.358     albertel  644:     undef($Apache::lonhomework::default_type);
                    645:     undef($Apache::lonhomework::type);
1.204     albertel  646: }
                    647: 
                    648: sub reset_problem_globals {
                    649:     my ($type)=@_;
                    650:     undef(%Apache::lonhomework::history);
                    651:     undef(%Apache::lonhomework::results);
                    652:     undef($Apache::inputtags::part);
1.208     albertel  653: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    654: #detect if we try to do 2 problems in one file
                    655: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  656:     undef($Apache::lonhomework::name);
1.358     albertel  657:     undef($Apache::lonhomework::default_type);
                    658:     undef($Apache::lonhomework::type);
                    659:     undef($Apache::lonhomework::scantronmode);
                    660:     undef($Apache::lonhomework::ignore_response_errors);
1.405     albertel  661:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel  662: }
                    663: 
1.241     albertel  664: sub set_problem_state {
1.240     albertel  665:     my ($part)=@_;
1.284     albertel  666:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  667: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    668: 	    'correct_by_student';
                    669:     }
                    670: }
                    671: 
1.241     albertel  672: sub get_problem_status {
                    673:     my ($part)=@_;
1.267     albertel  674:     my $problem_status;
1.284     albertel  675:     if ($env{'request.state'} eq 'construct' &&
                    676: 	defined($env{'form.problemstatus'})) {
                    677: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  678:     } else {
                    679: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    680: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  681: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  682:     }
                    683:     return $problem_status;
                    684: }
                    685: 
1.9       albertel  686: sub start_problem {
1.326     albertel  687:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  688: 
1.311     foxr      689:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  690:     if (!$Apache::lonxml::metamode) {
                    691: 	&Apache::lonxml::startredirection();
                    692:     }
1.311     foxr      693: 
1.308     foxr      694:     # Problems don't nest and we don't allow more than one <problem> in
                    695:     # a .problem file.
                    696:     #
1.184     albertel  697:     if ( $Apache::inputtags::part ne '' ||
                    698: 	 $Apache::lonhomework::parsing_a_problem) {
                    699: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  700: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  701: 	return '';
                    702:     }
1.184     albertel  703: 
                    704:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  705:     &init_problem_globals('problem');
1.166     albertel  706: 
1.284     albertel  707:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  708: 	$Apache::lonhomework::scantronmode=1;
                    709:     }
1.161     albertel  710: 
1.159     albertel  711:     if ($target ne 'analyze') {
                    712: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  713: 	if (($env{'request.state'} eq 'construct') &&
                    714: 	    defined($env{'form.problemtype'})) {
                    715: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  716: 	}
1.332     albertel  717: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  718:     }
1.164     albertel  719:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  720: 	my $uri=$env{'request.uri'};
1.159     albertel  721: 	if ($uri=~/\.(\w+)$/) {
                    722: 	    $Apache::lonhomework::type=$1;
                    723: 	    &Apache::lonxml::debug("Using type of $1");
                    724: 	} else {
                    725: 	    $Apache::lonhomework::type='problem';
                    726: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    727: 	}
1.87      albertel  728:     }
1.301     albertel  729:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       730: 
1.363     albertel  731:     &initialize_storage();
1.389     albertel  732:     if ($target ne 'analyze'
                    733:        	&& $env{'request.state'} eq 'construct') {
                    734: 	&set_problem_state('0');
                    735:     }
                    736: 
1.366     albertel  737:     if ($target eq 'web') {
                    738: 	&Apache::lonxml::debug(" grading history ");
                    739: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    740:     }
1.363     albertel  741: 
1.159     albertel  742:     #added vars to the scripting enviroment
1.213     albertel  743:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  744:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  745:     &Apache::run::run($expression,$safeeval);
1.159     albertel  746:     my $status;
                    747:     my $accessmsg;
                    748: 
1.343     albertel  749:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  750:     my ($result,$form_tag_start);
1.354     albertel  751:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    752: 	|| $target eq 'edit') {
1.350     albertel  753: 	($result,$form_tag_start) =
                    754: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    755: 			$name);
                    756:     }
                    757: 
1.284     albertel  758:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  759: 
                    760:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    761:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    762: 	$target eq 'tex') {
                    763: 	#handle exam checkout
                    764: 	if ($Apache::lonhomework::type eq 'exam') {
                    765: 	    my $token=
                    766: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  767: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  768: 		$token=&Apache::lonxml::maketoken();
                    769: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    770: 		    $token;
                    771: 	    }
1.343     albertel  772: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  773: 	}
1.284     albertel  774: 	if ($env{'form.markaccess'}) {
1.252     albertel  775: 	    &Apache::lonnet::set_first_access('map');
                    776: 	}
1.159     albertel  777: 	#handle rand seed in construction space
                    778: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  779: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  780: 	if ($env{'request.state'} ne "construct" && 
                    781: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  782: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    783: 		$rndseed.'" />'.
                    784: 		    '<input type="submit" name="resetdata"
1.334     albertel  785:                              value="'.&mt('New Problem Variation').'" />';
                    786: 	    if (exists($env{'form.username'})) {
                    787: 		$form_tag_start.=
1.164     albertel  788: 		    '<input type="hidden" name="username"
1.284     albertel  789:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  790: 	    }
1.333     albertel  791: 	    if ($env{'request.role.adv'}) {
1.267     albertel  792: 		$form_tag_start.=
1.300     albertel  793: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  794: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  795: 		    $form_tag_start.='checked="on"';
                    796: 		}
1.300     albertel  797: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    798: 		    '</label>';
1.267     albertel  799: 	    }
                    800: 	    $form_tag_start.='<hr />';
1.162     albertel  801: 	}
1.324     albertel  802: 
                    803: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    804: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  805: 	push (@Apache::inputtags::status,$status);
1.324     albertel  806: 
1.159     albertel  807: 	my $expression='$external::datestatus="'.$status.'";';
                    808: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    809: 	&Apache::run::run($expression,$safeeval);
                    810: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  811: 
1.159     albertel  812: 	if (( $status eq 'CLOSED' ) ||
                    813: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  814: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  815: 	    ( $status eq 'BANNED') ||
1.216     albertel  816: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  817: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  818: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  819: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    820: 						       $style);
1.159     albertel  821: 	    if ( $target eq "web" ) {
1.343     albertel  822: 		my $msg;
1.159     albertel  823: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  824: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  825: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  826: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  827: 		}
1.216     albertel  828: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       829: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  830: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  831: 		    $msg.=&checkout_msg();
1.252     albertel  832: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  833: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  834: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
                    835: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
1.159     albertel  836: 		}
                    837: 		$result.=$msg.'<br />';
                    838: 	    } elsif ($target eq 'tex') {
1.332     albertel  839: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    840: 		                    : '\begin{minipage}{\textwidth}';
                    841: 		$result.='\begin{document}\noindent \vskip 1 mm '.
                    842: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  843: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  844: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  845: 		} else {
1.211     albertel  846: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  847: 		}
                    848: 	    }
1.324     albertel  849: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  850: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    851: 						       $style);
1.324     albertel  852: 	    if ($target eq 'web') {
1.375     albertel  853: 		$result .= 
                    854: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  855: 	    } elsif ($target eq 'grade') {
                    856: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    857: 							'problem');
                    858: 	    }
1.159     albertel  859: 	} elsif ($target eq 'web') {
1.360     albertel  860: 	    if ($status eq 'CAN_ANSWER' 
                    861: 		&& $slot_name ne ''
                    862: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    863: 		# unproctored slot access, self checkin
                    864: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    865: 					      $slot_name);
                    866: 	    }
1.368     albertel  867: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  868: 	      '<input type="hidden" name="submitted" value="yes" />';
                    869: 	    # create a page header and exit
1.284     albertel  870: 	    if ($env{'request.state'} eq "construct") {
                    871: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  872: 	    }
                    873: 	    # if we are viewing someone else preserve that info
1.284     albertel  874: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  875: 		foreach my $field ('symb','courseid','domain','username') {
                    876: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  877: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  878: 		}
                    879: 	    }
                    880: 	} elsif ($target eq 'tex') {
1.319     foxr      881: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    882: 
1.99      sakharuk  883: 	}
1.159     albertel  884:     } elsif ($target eq 'edit') {
1.343     albertel  885: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel  886: 	$Apache::lonxml::warnings_error_header=
                    887: 	    &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  888: 	my $temp=&Apache::edit::insertlist($target,$token);
                    889: 	$result.=$temp;
                    890:     } elsif ($target eq 'modified') {
                    891: 	$result=$token->[4];
                    892:     } else {
                    893: 	# page_start returned a starting result, delete it if we don't need it
                    894: 	$result = '';
1.99      sakharuk  895:     }
1.159     albertel  896:     return $result;
1.9       albertel  897: }
                    898: 
                    899: sub end_problem {
1.159     albertel  900:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel  901:     my $result;
1.310     foxr      902: 
1.321     albertel  903:     if (!$Apache::lonxml::metamode) {
                    904: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel  905: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel  906:     }
1.319     foxr      907: 
                    908:     if ($target eq 'tex') {
1.321     albertel  909: 	# Figure out the front matter and replace the
                    910: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                    911: 	# this in end_problem because whether or not we display due
                    912: 	# dates depends on whether due dates have already been
                    913: 	# displayed in the problem parts.
                    914: 
1.319     foxr      915: 	my $frontmatter   = '';
                    916: 	my $startminipage = '';
                    917: 	if (not $env{'form.problem_split'}=~/yes/) {
                    918: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    919: 	}
                    920: 	my $id = $Apache::inputtags::part;
                    921: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    922: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    923: 	my @packages = split /,/,$packages;
                    924: 	my $allow_print_points = 0;
                    925: 	foreach my $partial_key (@packages) {
                    926: 	    if ($partial_key=~m/^part_0$/) {
                    927: 		$allow_print_points=1;
                    928: 	    }
                    929: 	}
                    930: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    931: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    932: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    933: 			'.disableexampointprint'}) eq 'yes') {
                    934: 	    $allow_print_points=0;
                    935: 	}
                    936: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    937: 	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 ';
                    938: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    939: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    940: 	
                    941: 	#  Figure out what the due date is and if we need to print
                    942: 	#  it in the problem header.  We have been logging the
                    943: 	#  last due date written to file. 
                    944: 	
                    945: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    946: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    947: 	my $temp_file;
                    948: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    949: 	
                    950: 	# Figure out what the last printed due date is or set it
                    951: 	# to the epoch if no duedates have been printed.
                    952: 	
                    953: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    954: 	if (-e $filename) {
                    955: 	    $temp_file = Apache::File->new($filename);
                    956: 	    my @due_file      = <$temp_file>;
                    957: 	    $due_file_content = $due_file[$#due_file];
                    958: 	    chomp $due_file_content;
                    959: 	} 
                    960: 	
                    961: 	# We display the due date iff it is not the same as the last
                    962: 	# duedate in problem header ($due_file_content), and
                    963: 	# none of our parts displayed a duedate.
                    964: 	#
                    965: 	my $parts_with_displayduedate;
                    966: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    967: 	    $parts_with_displayduedate = 
                    968: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    969: 	} else {
                    970: 	    $parts_with_displayduedate = 0;
                    971: 	}
                    972: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    973: 	    $temp_file = Apache::File->new('>'.$filename);
                    974: 	    print $temp_file "$duetime\n";
                    975: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    976: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    977: 		    $frontmatter .= $begin_doc.
                    978: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    979: 		} else {
                    980: 		    $frontmatter.= $begin_doc.$toc_line;
                    981: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    982: 		}
                    983: 	    } else {
1.381     albertel  984: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'.$startminipage;
1.319     foxr      985: 	    }
                    986: 	} else {
                    987: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    988: 		$frontmatter .= $begin_doc.$toc_line;
                    989: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    990: 	    } else {
1.381     albertel  991: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr      992: 	    }
                    993: 	}
                    994: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    995:     }
                    996: 
1.159     albertel  997:     my $status=$Apache::inputtags::status['-1'];
                    998:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    999: 	$target eq 'tex') {
1.249     albertel 1000: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1001: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1002: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1003: 		&Apache::inputtags::grade;
1.324     albertel 1004: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1005: 		# no need to grade, and don't want to hide data
1.249     albertel 1006: 	    } else {
                   1007: 		# move any submission data to .hidden
                   1008: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1009: 	    }
1.159     albertel 1010: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1011: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1012: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1013: 	    # if part is zero, no <part>s existed, so we need show the current
                   1014: 	    # grading status
                   1015: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1016: 	    $result.= $gradestatus;
                   1017: 	}
                   1018: 	if (
1.284     albertel 1019: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1020: 	    ($target eq 'answer') || ($target eq 'tex')
                   1021: 	   ) {
1.227     albertel 1022: 	    if ($target ne 'tex' &&
1.284     albertel 1023: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1024: 		$result.="</form>";
1.348     albertel 1025: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel 1026: 	    }
                   1027: 	    if ($target eq 'web') {
1.346     albertel 1028: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1029: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1030: 		my $endminipage = '';
1.284     albertel 1031: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1032: 		    $endminipage = '\end{minipage}';
                   1033: 		}
1.284     albertel 1034:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1035: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1036: 		} else {
1.262     sakharuk 1037: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1038: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1039: 			$result .= $endminipage.'\end{document} ';
                   1040: 		    } else {
1.382     albertel 1041: 			$result .= $endminipage;
1.262     sakharuk 1042: 		    }
1.159     albertel 1043: 		}
                   1044: 	    }
                   1045: 	}
                   1046: 	if ($target eq 'grade') {
                   1047: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1048: 	    &finalize_storage();
                   1049: 	}
1.284     albertel 1050: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1051: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1052: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1053: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1054: 	                        # we always show answer mode too.
1.159     albertel 1055: 	}
                   1056:     } elsif ($target eq 'meta') {
                   1057: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1058: 	    @Apache::inputtags::response=();
1.159     albertel 1059: 	    $result=&Apache::response::mandatory_part_meta;
                   1060: 	}
1.215     albertel 1061: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1062: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1063:     } elsif ($target eq 'edit') {
                   1064: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1065: 	$result .= &problem_edit_footer();
1.320     albertel 1066:     } elsif ($target eq 'modified') {
                   1067: 	 $result .= $token->[2];
1.159     albertel 1068:     }
1.155     albertel 1069: 
1.284     albertel 1070:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1071: 	&Apache::inputtags::check_for_duplicate_ids();
                   1072:     }
1.204     albertel 1073: 
                   1074:     &reset_problem_globals('problem');
1.159     albertel 1075: 
                   1076:     return $result;
1.48      albertel 1077: }
                   1078: 
1.108     albertel 1079: 
1.48      albertel 1080: sub start_library {
1.159     albertel 1081:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1082:     my ($result,$form_tag_start);
1.371     albertel 1083:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1084: 	&init_problem_globals('library');
                   1085: 	$Apache::lonhomework::type='problem';
                   1086:     }
1.159     albertel 1087:     if ($target eq 'edit') {
1.343     albertel 1088: 	($result,$form_tag_start)=
                   1089: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1090: 			'Edit');
                   1091: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1092: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1093: 	$result.=$temp;
                   1094:     } elsif ($target eq 'modified') {
                   1095: 	$result=$token->[4];
1.340     albertel 1096:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1097: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1098: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1099: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1100: 	($result,$form_tag_start)=
                   1101: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1102: 			$name);
1.159     albertel 1103: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1104: 	$result.=" \n $form_tag_start".	
1.159     albertel 1105: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1106: 	$result.=&problem_web_to_edit_header($rndseed);
                   1107:     }
                   1108:     return $result;
1.48      albertel 1109: }
                   1110: 
                   1111: sub end_library {
1.159     albertel 1112:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1113:     my $result='';
                   1114:     if ($target eq 'edit') {
                   1115: 	$result=&problem_edit_footer();
1.371     albertel 1116:     } elsif ($target eq 'web' 
                   1117: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1118: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1119: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1120:     }
1.371     albertel 1121:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1122: 	&reset_problem_globals('library');
                   1123:     }
1.159     albertel 1124:     return $result;
1.197     www      1125: }
                   1126: 
                   1127: sub start_definetag {
1.326     albertel 1128:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1129: 
                   1130:     my $result;
                   1131: 
                   1132:     my $name = $token->[2]->{'name'};
1.326     albertel 1133:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1134:     if ($target eq 'web') {
                   1135: 	if ($name=~/^\//) {
                   1136: 	    $result=
                   1137: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1138: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1139: 	} else {
                   1140: 	    $result=
                   1141: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1142: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1143: 	}
                   1144: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1145: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1146:     }
                   1147:     return $result;
                   1148: }
                   1149: 
                   1150: sub end_definetag {
                   1151:     return '';
1.1       albertel 1152: }
                   1153: 
                   1154: sub start_block {
1.201     albertel 1155:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1156: 
                   1157:     my $result;
1.1       albertel 1158: 
1.339     albertel 1159:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1160: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1161: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1162: 	if (defined($code) && $code ne '') {
1.137     albertel 1163: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1164: 		&Apache::lonxml::default_homework_load($safeeval);
                   1165: 	    }
1.131     albertel 1166: 	    $result = &Apache::run::run($code,$safeeval);
                   1167: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1168: 	} else {
                   1169: 	    $result='1';
                   1170: 	}
                   1171: 	if ( ! $result ) {
1.201     albertel 1172: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1173: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1174: 	}
                   1175: 	$result='';
                   1176:     } elsif ($target eq 'edit') {
                   1177: 	$result .=&Apache::edit::tag_start($target,$token);
                   1178: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1179: 					  $token,40);
                   1180: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1181:     } elsif ($target eq 'modified') {
                   1182: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1183: 						     $safeeval,'condition');
                   1184: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1185:     }
1.131     albertel 1186:     return $result;
1.1       albertel 1187: }
                   1188: 
                   1189: sub end_block {
1.167     www      1190:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1191:     my $result;
                   1192:     if ($target eq "edit") {
                   1193: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1194:     }
                   1195:     return $result;
                   1196: }
                   1197: 
                   1198: sub start_languageblock {
1.201     albertel 1199:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1200: 
                   1201:     my $result;
                   1202: 
1.339     albertel 1203:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1204: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1205: 	my $include = $token->[2]->{'include'};
                   1206: 	my $exclude = $token->[2]->{'exclude'};
1.398     www      1207:         my @preferred_languages=&Apache::loncommon::preferred_languages();
1.394     www      1208: # This should not even happen, since we should at least have the server language
1.398     www      1209:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1210: # Now loop over all languages in order of preference
                   1211:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1212: # If the languageblock has no arguments, show the contents
1.399     www      1213:            $result=1;
                   1214:            my $found=0;
1.394     www      1215: # Do we have an include argument?
1.398     www      1216: 	   if ($include) {
1.394     www      1217: # If include is specified, by default, don't render the block
1.399     www      1218:               $result=0;
1.398     www      1219:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1220: # ... but if my preferred language is included, render it
1.398     www      1221:                  if ($included_language eq $preferred_language) {
1.399     www      1222:                     $result=1; 
                   1223:                     $found=1; 
1.398     www      1224:                  }
                   1225:               }
                   1226: 	   }
1.394     www      1227: # Do we have an exclude argument?
1.398     www      1228:            if ($exclude) {
1.399     www      1229:               $result=1;
1.398     www      1230:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1231:                  if ($excluded_language eq $preferred_language) {
1.399     www      1232:                     $result=0;
                   1233:                     $found=1;
1.398     www      1234:                  }
                   1235:               }
                   1236: 	   }
1.399     www      1237:            if ($found) { last; }
1.398     www      1238:         }
1.201     albertel 1239: 	if ( ! $result ) {
                   1240: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1241: 						   $style);
                   1242: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1243: 	}
                   1244: 	$result='';
1.167     www      1245:     } elsif ($target eq 'edit') {
                   1246: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1247: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1248: 					  $token,40);
1.211     albertel 1249: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1250: 					  $token,40);
                   1251: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1252:     } elsif ($target eq 'modified') {
                   1253: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1254: 						     $safeeval,'include',
                   1255: 						     'exclude');
1.167     www      1256: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1257:     }
                   1258:     return $result;
                   1259: }
                   1260: 
                   1261: sub end_languageblock {
1.170     www      1262:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1263:     my $result;
1.201     albertel 1264:     if ($target eq "edit") {
1.170     www      1265: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1266:     }
                   1267:     return $result;
                   1268: }
                   1269: 
1.397     albertel 1270: {
                   1271:     my %available_texts;
                   1272:     sub start_translated {
                   1273: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1274: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1275: 	undef(%available_texts);
                   1276:     }
                   1277:     
                   1278:     sub end_translated {
                   1279: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1280: 	my $result;
                   1281: 	#show the translation on viewable targets
                   1282: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1283: 	    # or non-viewable targets, if it's embedded in something that
                   1284: 	    # wants the output
                   1285: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1286: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1287: 	    my @possibilities = keys(%available_texts);
                   1288: 	    my $which = 
                   1289: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1290: 	    $result = $available_texts{$which};
                   1291: 	}
                   1292: 	undef(%available_texts);
                   1293: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1294: 	return $result;
                   1295:     }
                   1296: 
                   1297: 
                   1298:     sub start_lang {
                   1299: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1300: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1301: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1302: 	    &Apache::lonxml::startredirection();
                   1303: 	}
                   1304: 	return '';
                   1305:     }
                   1306: 
                   1307:     sub end_lang {
                   1308: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1309: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1310: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1311: 	    my $result = &Apache::lonxml::endredirection();
                   1312: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1313: 						   $safeeval);
                   1314: 	    $available_texts{$which} = $result;
                   1315: 	}
                   1316: 	return '';
                   1317:     }
                   1318: }
                   1319: 
1.170     www      1320: sub start_instructorcomment {
1.201     albertel 1321:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1322: 
                   1323:     my $result;
                   1324: 
1.339     albertel 1325:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1326: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1327:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1328: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1329: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1330: 						   $parser,$style);
1.170     www      1331: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1332: 	}
                   1333: 	$result='';
                   1334:     } elsif ($target eq 'edit') {
                   1335: 	$result .=&Apache::edit::tag_start($target,$token);
                   1336: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1337:     }
                   1338:     return $result;
                   1339: }
                   1340: 
                   1341: sub end_instructorcomment {
1.159     albertel 1342:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1343:     my $result;
                   1344:     if ($target eq "edit") {
                   1345: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1346:     }
                   1347:     return $result;
1.4       tsai     1348: }
                   1349: 
                   1350: sub start_while {
1.326     albertel 1351:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1352: 
1.160     albertel 1353:     my $result;
1.339     albertel 1354:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1355: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1356: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1357: 
1.160     albertel 1358: 	push( @Apache::structuretags::whileconds, $code);
                   1359: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1360: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1361: 	}
                   1362: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1363: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1364: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1365: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1366: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1367: 	if ( $result ) {
                   1368: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1369: 	}
                   1370:     } elsif ($target eq 'edit') {
                   1371: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1372: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1373: 					  $token,40);
                   1374: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1375:     } elsif ($target eq 'modified') {
                   1376: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1377: 						     $safeeval,'condition');
                   1378: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1379:     }
1.160     albertel 1380:     return $result;
1.4       tsai     1381: }
                   1382: 
                   1383: sub end_while {
1.159     albertel 1384:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1385:     my $result;
                   1386: 
1.339     albertel 1387:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1388: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1389: 	my $code = pop(@Apache::structuretags::whileconds);
                   1390: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1391: 	my $line = pop(@Apache::structuretags::whileline);
                   1392: 	my $return = &Apache::run::run($code,$safeeval);
                   1393: 	my $starttime=time;
                   1394: 	my $error=0;
                   1395: 	while ($return) {
                   1396: 	    if (time-$starttime >
                   1397: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1398: 		$return = 0; $error=1; next;
1.161     albertel 1399: 	    }
                   1400: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1401: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1402: 		$target eq 'analyze') {
                   1403: 		# grade/answer/analyze should produce no output but if we
                   1404: 		# are redirecting, the redirecter should know what to do
                   1405: 		# with the output
                   1406: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1407: 	    }
1.161     albertel 1408: 	    $return = &Apache::run::run($code,$safeeval);
                   1409: 	}
                   1410: 	if ($error) {
1.270     albertel 1411: 	    &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 1412: 	}
                   1413:     } elsif ($target eq "edit") {
                   1414: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1415:     }
1.160     albertel 1416:     return $result;
1.1       albertel 1417: }
1.6       tsai     1418: 
1.160     albertel 1419: # <randomlist show="1">
1.6       tsai     1420: #  <tag1>..</tag1>
                   1421: #  <tag2>..</tag2>
                   1422: #  <tag3>..</tag3>
1.160     albertel 1423: #  ...
1.6       tsai     1424: # </randomlist>
                   1425: sub start_randomlist {
1.326     albertel 1426:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1427:     my $result;
1.339     albertel 1428:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1429: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1430: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1431: 	my $b_parser= HTML::LCParser->new(\$body);
                   1432: 	$b_parser->xml_mode(1);
                   1433: 	$b_parser->marked_sections(1);
1.159     albertel 1434: 	my $b_tok;
                   1435: 	my @randomlist;
                   1436: 	my $list_item;
                   1437: 	while($b_tok = $b_parser->get_token() ) {
                   1438: 	    if($b_tok->[0] eq 'S') { # start tag
                   1439: 		# get content of the tag until matching end tag
                   1440: 		# get all text upto the matching tag
                   1441: 		# and push the content into @randomlist
                   1442: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1443: 							   $b_parser);
                   1444: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1445: 		push(@randomlist,$list_item);
                   1446: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1447:                 #         $list_item</b>";
                   1448: 	    }
                   1449: 	    if($b_tok->[0] eq 'T') { # text
                   1450: 		# what to do with text in between tags?
                   1451: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1452: 	    }
                   1453: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1454: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1455: 	    # }
                   1456: 	}
1.303     albertel 1457: 	if (@randomlist) {
                   1458: 	    my @idx_arr = (0 .. $#randomlist);
                   1459: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1460: 	    my $bodytext = '';
                   1461: 	    my $show=$#randomlist;
                   1462: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1463: 	    $showarg--;
                   1464: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1465: 	    for(0 .. $show) {
                   1466: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1467: 	    }
                   1468: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1469: 	}
                   1470:     } elsif ($target eq 'edit' ) {
                   1471: 	$result .=&Apache::edit::tag_start($target,$token);
                   1472: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1473: 					   $token,5);
                   1474: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1475:     } elsif ($target eq 'modified' ) {
                   1476: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1477: 						     $safeeval,'show');
                   1478: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1479:     }
                   1480:     return $result;
1.7       tsai     1481: }
                   1482: 
                   1483: sub shuffle {
                   1484:     my $a=shift;
                   1485:     my $i;
1.303     albertel 1486:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1487: 	&Apache::response::pushrandomnumber();
1.159     albertel 1488: 	for($i=@$a;--$i;) {
                   1489: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1490: 	    next if $i == $j;
                   1491: 	    @$a[$i,$j] = @$a[$j,$i];
                   1492: 	}
1.251     albertel 1493: 	&Apache::response::poprandomnumber();
1.7       tsai     1494:     }
1.6       tsai     1495: }
                   1496: 
                   1497: sub end_randomlist {
1.159     albertel 1498:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1499:     my $result;
                   1500:     if ($target eq 'edit' ) {
                   1501: 	$result=&Apache::edit::tag_end($target,$token,
                   1502: 				       'End Randomly Parsed Block');
                   1503:     }
                   1504:     return $result;
1.6       tsai     1505: }
                   1506: 
1.283     albertel 1507: sub ordered_show_check {
                   1508:     my $last_part=$Apache::inputtags::partlist[-2];
                   1509:     my $in_order=
                   1510: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1511:     my $in_order_show=1;
                   1512:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1513: 	$in_order_show=&Apache::response::check_status($last_part);
                   1514:     }
                   1515:     return $in_order_show;
                   1516: }
                   1517: 
1.11      albertel 1518: sub start_part {
1.326     albertel 1519:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1520:     if (!$Apache::lonxml::metamode) {
                   1521: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1522: 	                                     # duedates.
                   1523:     }
1.159     albertel 1524:     my $result='';
1.386     albertel 1525:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1526:     $Apache::inputtags::part=$id;
1.177     albertel 1527:     push(@Apache::inputtags::partlist,$id);
                   1528:     @Apache::inputtags::response=();
1.159     albertel 1529:     @Apache::inputtags::previous=();
                   1530:     @Apache::inputtags::previous_version=();
1.405     albertel 1531:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1532:     &Apache::response::reset_params();
                   1533: 
1.159     albertel 1534:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1535:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1536:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1537:     my $in_order_show=&ordered_show_check();
1.214     albertel 1538:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1539:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1540:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1541: 
                   1542:     if ($target eq 'meta') {
1.224     www      1543: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1544: 	return &Apache::response::mandatory_part_meta.
                   1545: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1546:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1547: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1548: 	if ($hidden || !$in_order_show) {
1.326     albertel 1549: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1550: 	} else {
                   1551: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1552: 	    push (@Apache::inputtags::status,$status);
                   1553: 	    my $expression='$external::datestatus="'.$status.'";';
                   1554: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1555: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1556: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1557: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1558: 	    }
1.216     albertel 1559: 	    if (( $status eq 'CLOSED' ) ||
                   1560: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1561: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1562: 		( $status eq 'BANNED') ||
                   1563: 		( $status eq 'UNAVAILABLE') ||
                   1564: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1565: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1566: 							   $style);
1.159     albertel 1567: 		if ( $target eq "web" ) {
1.211     albertel 1568: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1569: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1570: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1571: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1572: 		    } else {
1.211     albertel 1573: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1574: 		    }
1.159     albertel 1575: 		}
                   1576: 	    } else {
                   1577: 		if ($target eq 'tex') {
1.284     albertel 1578: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1579: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1580: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1581: 			} else {
                   1582: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1583: 			}
1.195     sakharuk 1584: 		    }
1.159     albertel 1585: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1586: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1587: 		    my @allkeys = split /,/,$allkeys;
                   1588: 		    my $allow_print_points = 0;
                   1589: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1590: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1591: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1592: 			}
                   1593: 		    }
1.275     albertel 1594: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1595: 		    if (defined($maxtries) && $maxtries < 0) {
                   1596: 			$allow_print_points=0;
                   1597: 		    }
1.302     albertel 1598: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1599: 				    '.disableexampointprint'}) eq 'yes') {
                   1600: 			$allow_print_points=0;
                   1601: 		    }
1.222     sakharuk 1602: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1603: 		} elsif ($target eq 'web') {
1.356     www      1604: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1605: 		}
                   1606: 	    }
                   1607: 	}
                   1608:     } elsif ($target eq 'edit') {
                   1609: 	$result.=&Apache::edit::tag_start($target,$token);
                   1610: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1611: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1612: 	    '&nbsp;&nbsp;'.
                   1613: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1614: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1615:     } elsif ($target eq 'modified') {
                   1616: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1617: 						     $safeeval,'id','display');
1.159     albertel 1618: 	if ($constructtag) {
1.225     albertel 1619: 	    #limiting ids to only letters numbers, and space
1.224     www      1620: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1621: 	    $result = &Apache::edit::rebuild_tag($token);
                   1622: 	}
                   1623:     }
                   1624:     return $result;
1.11      albertel 1625: }
                   1626: 
                   1627: sub end_part {
1.159     albertel 1628:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1629:     &Apache::lonxml::debug("in end_part $target ");
                   1630:     my $status=$Apache::inputtags::status['-1'];
                   1631:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1632:     my $in_order_show=&ordered_show_check();
1.321     albertel 1633:     my $result;
                   1634:     if (!$Apache::lonxml::metamode) {
                   1635: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1636: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1637:     }
1.312     albertel 1638:     if ($target eq 'grade') {
1.249     albertel 1639: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1640: 	    !$hidden && $in_order_show) {
1.311     foxr     1641: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1642: 	} else {
                   1643: 	    # move any submission data to .hidden
                   1644: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1645: 	}
1.283     albertel 1646:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1647: 	     !$hidden && $in_order_show) {
1.159     albertel 1648: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1649: 							$target);
1.212     albertel 1650: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1651: 	    $gradestatus='';
                   1652: 	}
1.311     foxr     1653: 	$result.=$gradestatus;
1.265     sakharuk 1654: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1655:     } elsif ($target eq 'edit') {
1.311     foxr     1656: 	$result.=&Apache::edit::end_table();
1.322     albertel 1657:     } elsif ($target eq 'modified') {
                   1658: 	 $result .= $token->[2];
1.159     albertel 1659:     }
                   1660:     pop @Apache::inputtags::status;
                   1661:     $Apache::inputtags::part='';
1.295     albertel 1662:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1663:     return $result;
1.11      albertel 1664: }
1.1       albertel 1665: 
1.25      albertel 1666: sub start_preduedate {
1.326     albertel 1667:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1668:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1669: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1670: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1671: 	if (!$Apache::lonhomework::scantronmode &&
                   1672: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1673: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1674: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1675: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1676: 	}
1.24      albertel 1677:     }
1.159     albertel 1678:     return '';
1.24      albertel 1679: }
                   1680: 
1.25      albertel 1681: sub end_preduedate {
1.159     albertel 1682:     return '';
1.24      albertel 1683: }
                   1684: 
1.369     foxr     1685: # In all the modes where <postanswerdate> text is 
                   1686: # displayable,  all we do is eat up the text between the start/stop
                   1687: # tags if the conditions are not right to display it.
1.25      albertel 1688: sub start_postanswerdate {
1.326     albertel 1689:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1690:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1691: 	&Apache::lonnet::allowed('pav',
                   1692: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1693:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1694: 	$target eq 'tex' ) {
1.300     albertel 1695: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1696: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1697: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1698: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1699: 	}
                   1700:     }
                   1701:     return '';
1.24      albertel 1702: }
                   1703: 
1.25      albertel 1704: sub end_postanswerdate {
1.159     albertel 1705:     return '';
1.24      albertel 1706: }
                   1707: 
1.25      albertel 1708: sub start_notsolved {
1.326     albertel 1709:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1710:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1711: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1712: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1713: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1714: 	if ($gradestatus =~ /^correct/ &&
                   1715: 	    &Apache::response::show_answer()) {
1.159     albertel 1716: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1717: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1718: 	}
1.24      albertel 1719:     }
1.159     albertel 1720:     return '';
1.24      albertel 1721: }
                   1722: 
1.25      albertel 1723: sub end_notsolved {
1.159     albertel 1724:     return '';
1.24      albertel 1725: }
                   1726: 
                   1727: sub start_solved {
1.326     albertel 1728:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1729:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1730: 	$target eq 'tex') {
                   1731: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1732: 	if ($gradestatus !~ /^correct/ ||
                   1733: 	    !&Apache::response::show_answer()) {
1.326     albertel 1734: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1735: 	}
1.24      albertel 1736:     }
1.159     albertel 1737:     return '';
1.24      albertel 1738: }
                   1739: 
                   1740: sub end_solved {
1.248     albertel 1741:     return '';
                   1742: }
                   1743: 
                   1744: sub start_problemtype {
1.326     albertel 1745:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1746:     my $result;
1.339     albertel 1747:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1748: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1749: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1750: 	if (!defined($mode)) { $mode='show'; }
                   1751: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1752: 	my $found=0;
                   1753: 	foreach my $type (split(',',$for)) {
                   1754: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1755: 	}
                   1756: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1757: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1758: 	}
                   1759: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1760: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1761: 	}
                   1762:     } elsif ($target eq 'edit') {
                   1763: 	$result .=&Apache::edit::tag_start($target,$token);
                   1764: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1765: 					   [['show','Show'],
                   1766: 					    ['hide','Hide']]
                   1767: 					   ,$token);
                   1768: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1769: 					     [ ['exam','Exam/Quiz Problem'],
                   1770: 					       ['survey','Survey'],
                   1771: 					       ['problem','Homework Problem'] ]
                   1772: 					     ,$token);
                   1773: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1774:     } elsif ($target eq 'modified') {
                   1775: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1776: 						     $safeeval,'mode','for');
                   1777: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1778:     }
                   1779:     return $result;
                   1780: }
                   1781: 
                   1782: sub end_problemtype {
1.159     albertel 1783:     return '';
1.24      albertel 1784: }
1.34      albertel 1785: 
                   1786: sub start_startouttext {
1.159     albertel 1787:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1788:     my @result=(''.'');
                   1789:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 1790:     
                   1791:     my $nesting = 
                   1792: 	&Apache::lonxml::set_state('outtext',
                   1793: 				   &Apache::lonxml::get_state('outtext')+1);
                   1794:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   1795: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   1796:     }
1.159     albertel 1797:     return (@result);
1.34      albertel 1798: }
1.159     albertel 1799: 
1.34      albertel 1800: sub end_startouttext {
1.326     albertel 1801:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1802:     my $result='';
                   1803:     my $text='';
                   1804: 
                   1805:     if ($target eq 'edit') {
1.326     albertel 1806: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.211     albertel 1807: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1808: <td>".&mt('Delete:').
1.159     albertel 1809:                  &Apache::edit::deletelist($target,$token)
                   1810: 		 ."</td>
1.42      albertel 1811: <td>".
1.159     albertel 1812:                  &Apache::edit::insertlist($target,$token).
1.362     albertel 1813: 		 '</td><td align="right" valign="top">' .
                   1814: 		 &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1815: 		 &Apache::edit::end_row().
1.362     albertel 1816:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1817: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1818:     }
                   1819:     if ($target eq 'modified') {
1.219     albertel 1820: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1821:     }
                   1822:     if ($target eq 'tex') {
                   1823: 	$result .= '\noindent ';
                   1824:     }
                   1825:     return $result;
1.34      albertel 1826: }
1.159     albertel 1827: 
1.34      albertel 1828: sub start_endouttext {
1.159     albertel 1829:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1830:     my $result='';
                   1831:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1832:     if ($target eq "modified") {
                   1833: 	$result='<endouttext />'.
1.377     albertel 1834: 	    &Apache::edit::handle_insertafter('startouttext');
                   1835:     }
1.404     albertel 1836: 
                   1837:     my $nesting = 
                   1838: 	&Apache::lonxml::set_state('outtext',
                   1839: 				   &Apache::lonxml::get_state('outtext')-1);
                   1840:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   1841: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   1842: 	&Apache::lonxml::set_state('outtext', 0);
                   1843:     }
1.159     albertel 1844:     return $result;
1.34      albertel 1845: }
1.159     albertel 1846: 
1.34      albertel 1847: sub end_endouttext {
1.159     albertel 1848:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1849:     my @result=('','');
                   1850:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1851:     return (@result);
1.34      albertel 1852: }
1.159     albertel 1853: 
1.45      albertel 1854: sub delete_startouttext {
1.326     albertel 1855:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1856:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 1857:     my $text=$$parser['-1']->get_text("/endouttext");
                   1858:     my $ntoken=$$parser['-1']->get_token();
                   1859:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1860:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1861:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1862:     # they did the last time round
                   1863:     &Apache::lonxml::increasedepth($ntoken);
                   1864:     &Apache::lonxml::decreasedepth($ntoken);
                   1865:     return 1;
1.193     www      1866: }
                   1867: 
                   1868: sub start_simpleeditbutton {
                   1869:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1870:     my $result='';
1.284     albertel 1871:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1872: 	($target eq 'web') &&
1.330     albertel 1873:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 1874:         my $url=$env{'request.noversionuri'};
1.193     www      1875:         $url=~s/\?.*$//;
1.367     albertel 1876: 	my ($symb) = &Apache::lonnet::whichuser();
1.194     www      1877: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.356     www      1878:                 '<a href="'.$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      1879: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1880:     }
                   1881:     return $result;
                   1882: }
                   1883: 
                   1884: sub end_simpleeditbutton {
                   1885:     return '';
1.45      albertel 1886: }
1.34      albertel 1887: 
1.1       albertel 1888: 1;
                   1889: __END__

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