Annotation of loncom/homework/structuretags.pm, revision 1.399

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.399   ! www         4: # $Id: structuretags.pm,v 1.398 2007/09/12 07:59:51 www 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 $result;;
1.10      albertel   89: }
                     90: 
                     91: sub end_tex {
1.44      ng         92:     return '';
1.9       albertel   93: }
                     94: 
1.48      albertel   95: sub page_start {
1.345     albertel   96:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                     97: 	$extra_head)=@_;
1.159     albertel   98:     my %found;
1.207     albertel   99:     foreach my $taginside (@$tagstack) {
1.159     albertel  100: 	foreach my $taglookedfor ('html','body','form') {
                    101: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    102: 	}
                    103:     }
                    104: 
1.343     albertel  105:     if ($target eq 'tex') {
                    106: 	return
                    107: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                    108: 					   $parstack,$parser,$safeeval);
                    109:     }
                    110: 
1.374     albertel  111:     $extra_head.= '
                    112: <script type="text/javascript">
                    113: function setSubmittedPart (part) {
                    114:    this.document.lonhomework.submitted.value="part_"+part;
                    115: }
                    116: </script>
                    117: ';
                    118: 
1.344     albertel  119:     my %body_args;
                    120:     if (defined($found{'html'})) {
                    121: 	$body_args{'skip_phases'}{'head'}=1;
                    122:     } else {
1.343     albertel  123: 	
1.345     albertel  124: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel  125: 
1.379     albertel  126: 	$extra_head .= &Apache::londefdef::generate_css_links();
                    127: 
1.384     albertel  128: 	if ($env{'request.state'} eq 'construct') {
1.343     albertel  129: 	    $extra_head.=&Apache::edit::js_change_detection().
                    130: 		"<script type=\"text/javascript\">\n".
                    131: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    132: 		&Apache::loncommon::browser_and_searcher_javascript().
                    133:                 "\n</script>\n";
                    134: 	}
1.159     albertel  135:     }
1.343     albertel  136: 
1.344     albertel  137:     if (defined($found{'body'})) {
                    138: 	$body_args{'skip_phases'}{'body'}=1;
                    139:     } elsif (!defined($found{'body'}) 
                    140: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  141: 	if ($target eq 'web' || $target eq 'edit') {
1.344     albertel  142: 	    # no extra args to bodytag
1.297     albertel  143: 	}
1.272     albertel  144:     } elsif (!defined($found{'body'})) {
1.343     albertel  145: 	my %add_entries;
1.159     albertel  146: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    147: 						  $safeeval);
1.343     albertel  148: 	if ($background ne '' ) {
                    149: 	    $add_entries{'background'} = $background;
                    150: 	}
1.344     albertel  151: 
1.290     albertel  152: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    153: 					       $safeeval);
1.344     albertel  154:        	if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
                    155: 
                    156: 	$body_args{'bgcolor'}        = $bgcolor;
                    157: 	$body_args{'no_title'}       = 1;
                    158: 	$body_args{'force_register'} = 1;
                    159: 	$body_args{'add_entries'}    = \%add_entries;	
1.391     albertel  160: 	if ($env{'environment.remote'} eq 'off'
                    161: 	    && $env{'request.state'} eq   'construct') {
                    162: 	    $body_args{'only_body'}  = 1;
                    163: 	}
1.344     albertel  164:     }
1.365     albertel  165:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  166:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    167: 						    \%body_args);
                    168: 
                    169:     if (!defined($found{'body'}) 
                    170: 	&& $env{'request.state'} ne 'construct'
                    171: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    172: 
1.367     albertel  173: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
1.344     albertel  174: 	if ($symb eq '' && !$publicuser) {
                    175: 	    my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
                    176: 	    $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
                    177: 	    $page_start .= $help;
1.159     albertel  178: 	}
1.344     albertel  179:     }
                    180: 
                    181:     if (!defined($found{'body'})) {
1.343     albertel  182: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  183:     }
1.344     albertel  184:     
1.159     albertel  185:     my $form_tag_start;
                    186:     if (!defined($found{'form'})) {
1.337     albertel  187: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.338     albertel  188: 	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.327     albertel  189: 	$form_tag_start.=$uri.'" ';
                    190: 	if ($target eq 'edit') {
                    191: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    192: 	}
1.368     albertel  193: 	$form_tag_start.='>'."\n";
1.355     albertel  194: 
                    195: 	my $symb=&Apache::lonnet::symbread();
                    196: 	if ($symb =~ /\S/) {
                    197: 	    $symb=
                    198: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    199: 	    $form_tag_start.=
1.368     albertel  200: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  201: 	}
1.159     albertel  202:     }
1.343     albertel  203:     return ($page_start,$form_tag_start);
1.105     albertel  204: }
                    205: 
1.141     matthew   206: #use Time::HiRes();
1.105     albertel  207: sub get_resource_name {
1.159     albertel  208:     my ($parstack,$safeeval)=@_;
1.388     foxr      209:     my $name;
1.204     albertel  210:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      211: 	$name = $Apache::lonhomework::name;
                    212:     } else {
                    213: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  214: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      215: 	if ($name eq '') {
                    216: 	    $name=&Apache::lonnet::EXT('resource.title');
                    217: 	    if ($name eq 'con_lost') { $name = ''; }
                    218: 	}
                    219: 	if ($name!~/\S+/) {
                    220: 	    $name=$env{'request.uri'};
                    221: 	    $name=~s-.*/([^/]+)$-$1-;
                    222: 	}
                    223: 	# The name has had html tags escaped:
                    224:        
                    225: 	$name=~s/&lt;/</gs;
                    226: 	$name=~s/&gt;/>/gs;
                    227: 
                    228: 	$Apache::lonhomework::name=$name;
1.204     albertel  229:     }
1.159     albertel  230:     return $name;
1.105     albertel  231: }
                    232: 
                    233: sub setup_rndseed {
1.159     albertel  234:     my ($safeeval)=@_;
                    235:     my $rndseed;
1.367     albertel  236:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  237:     if ($env{'request.state'} eq "construct" 
                    238: 	|| $symb eq '' 
                    239: 	|| $Apache::lonhomework::type eq 'practice'
                    240: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       241: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  242: 						['rndseed']);
1.284     albertel  243: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  244: 	if (!$rndseed) {
1.162     albertel  245: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    246: 	    if (!$rndseed) {
                    247: 		$rndseed=time;
                    248: 	    }
1.284     albertel  249: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  250: 	}
1.374     albertel  251: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    252: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  253: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  254: 	    srand(time);
                    255: 	    $rndseed=int(rand(2100000000));
1.284     albertel  256: 	    $env{'form.rndseed'}=$rndseed;
                    257: 	    delete($env{'form.resetdata'});
                    258: 	    delete($env{'form.newrandomization'});
1.159     albertel  259: 	}
1.187     albertel  260: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  261: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  262:         }
1.247     albertel  263:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    264: 	   $rndseed=&Apache::lonnet::rndseed();
                    265: 	}
1.221     albertel  266: 	if ($safeeval) {
                    267: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  268: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  269: 	}
1.159     albertel  270:     }
                    271:     return $rndseed;
1.105     albertel  272: }
                    273: 
1.268     albertel  274: sub remember_problem_state {
                    275:     return '
1.284     albertel  276:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    277:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    278:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  279: }
                    280: 
1.105     albertel  281: sub problem_edit_header {
1.268     albertel  282:     return '<input type="hidden" name="submitted" value="edit" />'.
                    283: 	&Apache::structuretags::remember_problem_state().'
1.210     albertel  284:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   285:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
1.328     albertel  286:        <input '.&Apache::edit::submit_ask_anyway().' type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   287:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    288:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    289:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.359     albertel  290:        &Apache::loncommon::help_open_menu('Problem Editing Help','Problem_Editor_XML_Index',5,'Authoring',undef,undef,undef,'Problem Editing Help')
1.260     albertel  291:        .'</td></tr></table>'.
1.282     albertel  292:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  293: }
                    294: 
                    295: sub problem_edit_footer {
1.210     albertel  296:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       297:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
1.348     albertel  298:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  299:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  300: }
                    301: 
1.235     albertel  302: sub option {
                    303:     my ($value,$name) = @_;
                    304:     my $result ="<option value='".$value."' ";
1.284     albertel  305:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  306: 	$result.=" selected='on' ";
                    307:     }
                    308:     $result.='>';
                    309:     return $result;
                    310: }
                    311: 
1.105     albertel  312: sub problem_web_to_edit_header {
1.159     albertel  313:     my ($rndseed)=@_;
1.313     albertel  314:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
1.373     albertel  315:     $result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
1.313     albertel  316:     $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   317:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    318:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  319:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.270     albertel  320:               <input type="text" name="rndseed" size="10" value="'.
1.175     albertel  321: 	       $rndseed.'"
1.270     albertel  322:            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.384     albertel  323:              <span class="LC_nobreak"><label><input type="checkbox" name="showallfoils" ';
1.315     albertel  324:     my $show_all_foils_text = 
                    325: 	($Apache::lonhomework::parsing_a_task) ?
                    326: 	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
                    327: 	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    328: 
1.284     albertel  329:     if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
1.384     albertel  330:     $result.= ' />'.$show_all_foils_text.'</label></span>'.
1.228     www       331: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
1.371     albertel  332: 	'<hr />';
1.386     albertel  333:     $result.=&mt('Apply style file: ').'
1.384     albertel  334: <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    335:  <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    336: <input type="submit" name="clear_style_file" value="'.&mt('Clear').'" />
                    337: <br />';
                    338: 
1.313     albertel  339:     if (!$Apache::lonhomework::parsing_a_task) {
                    340: 	$result.="
1.235     albertel  341: <nobr>
                    342: Problem Status:
                    343: <select name='problemstate'>
1.270     albertel  344:   <option value=''></option>
1.235     albertel  345:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    346:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    347:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    348:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    349:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    350: </select>
                    351: </nobr>
                    352: <nobr>
                    353: Problem Type:
                    354: <select name='problemtype'>
1.270     albertel  355:   <option value=''></option>
1.242     albertel  356:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    357:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    358:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  359: </select>
                    360: </nobr>
                    361: <nobr>
                    362: Feedback Mode:
                    363: <select name='problemstatus'>
                    364:   <option value=''></option>
1.242     albertel  365:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    366:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  367: </select>
                    368: </nobr>
1.242     albertel  369: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  370: <hr />";
1.313     albertel  371: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    372: 	if (!$numtoanalyze) { $numtoanalyze=20; }
                    373: 	$result.= '<input type="submit" name="problemmode" value='.
                    374: 	    &mt('"Calculate answers').'" /> for
1.136     albertel  375:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  376: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    377: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  378: 						     '',undef,undef,300).
1.210     albertel  379: 						     '<hr />';
1.376     albertel  380:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    381: 	$result.="
                    382: <nobr>
                    383: Problem Status:
                    384: <select name='problemstate'>
                    385:   <option value=''></option>
                    386:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    387:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    388:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    389:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    390: </select>
                    391: </nobr>
                    392: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
                    393: <hr />";
1.313     albertel  394:     }
1.159     albertel  395:     return $result;
1.48      albertel  396: }
                    397: 
1.65      albertel  398: sub initialize_storage {
1.357     albertel  399:     my ($given_symb) = @_;
1.353     albertel  400:     undef(%Apache::lonhomework::results);
                    401:     undef(%Apache::lonhomework::history);
1.357     albertel  402:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  403: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  404:     
                    405:     # anonymous users (CODEd exams) have no data
                    406:     if ($name eq 'anonymous' 
                    407: 	&& !defined($domain)) {
                    408: 	return;
                    409:     }
                    410: 
1.333     albertel  411:     if ($env{'request.state'} eq 'construct' 
                    412: 	|| $symb eq ''
                    413: 	|| $Apache::lonhomework::type eq 'practice') {
                    414: 	
                    415: 	my $namespace = $symb || $env{'request.uri'};
                    416: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  417: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    418: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  419: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    420: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    421: 	    &Apache::lonxml::debug("Attempt reset");
                    422: 	}
1.159     albertel  423: 	%Apache::lonhomework::history=
1.333     albertel  424: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  425: 	my ($temp)=keys %Apache::lonhomework::history ;
                    426: 	&Apache::lonxml::debug("Return message of $temp");
                    427:     } else {
                    428: 	%Apache::lonhomework::history=
                    429: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    430:     }
1.353     albertel  431: 
1.159     albertel  432:     #ignore error conditions
1.67      albertel  433:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  434:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  435: }
                    436: 
                    437: # -------------------------------------------------------------finalize_storage
                    438: # Stores away the result has to a student's environment
                    439: # checks form.grade_ for specific values, other wises stores
                    440: # to the running users environment
1.285     raeburn   441: # Will increment totals for attempts, students, and corrects
                    442: # if running user has student role.  
1.65      albertel  443: sub finalize_storage {
1.357     albertel  444:     my ($given_symb) = @_;
1.159     albertel  445:     my $result;
1.289     albertel  446:     if (%Apache::lonhomework::results) {
1.323     albertel  447: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    448: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  449: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  450: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  451: 	if ($env{'request.state'} eq 'construct' 
                    452: 	    || $symb eq ''
                    453: 	    || $Apache::lonhomework::type eq 'practice') {
                    454: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  455: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  456: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  457: 					      $namespace,'',$domain,$name);
1.159     albertel  458: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    459: 	} else {
                    460: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    461: 					    $symb,$courseid,$domain,$name);
                    462: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   463:             if ($env{'request.role'} =~/^st/) {
                    464:                 &store_aggregates($symb,$courseid);
                    465:             }
1.159     albertel  466: 	}
1.323     albertel  467:     } else {
                    468: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  469:     }
1.159     albertel  470:     return $result;
1.65      albertel  471: }
                    472: 
1.285     raeburn   473: # -------------------------------------------------------------store_aggregates
                    474: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    475: # for the course. Increments total number of attempts, unique students 
                    476: # and corrects for each part for an instance of a problem, as appropriate.
                    477: sub store_aggregates {
                    478:     my ($symb,$courseid) = @_;
1.286     albertel  479:     my %aggregate;
                    480:     my @parts;
1.288     albertel  481:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    482:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  483:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  484:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  485:             push(@parts, $1);
1.285     raeburn   486:         }
                    487:     }
1.286     albertel  488:     foreach my $part (@parts) {
                    489:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    490: 	    eq 'APPROX_ANS' ||
                    491: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    492: 	    eq 'EXACT_ANS') {
1.287     albertel  493:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   494:         }
1.286     albertel  495:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  496:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   497:         } else {
1.293     albertel  498:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   499:             if ($last_reset) {
1.293     albertel  500:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   501:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    502:                 }
                    503:             }
1.285     raeburn   504:         }
1.287     albertel  505:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   506:     }
1.292     raeburn   507:     if (keys (%aggregate) > 0) {
1.289     albertel  508: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   509:                             $cdomain,$cname);
                    510:     }
                    511: }
1.289     albertel  512: 
1.65      albertel  513: sub checkout_msg {
1.211     albertel  514:     my %lt=&Apache::lonlocal::texthash( 
                    515: 		'resource'=>'The resource needs to be checked out',
                    516: 		'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.',
                    517:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    518:                 'checkout'=>'Check out Exam for Viewing',
                    519: 		'checkout?'=>'Check out Exam?');
1.352     albertel  520:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  521:     return (<<ENDCHECKOUT);
1.211     albertel  522: <h2>$lt{'resource'}</h2>
                    523:     <p>$lt{'id_expln'}</p>
                    524: <font color="red">
                    525: <p>$lt{'warning'}</p>
1.91      albertel  526: </font>
1.352     albertel  527: <form name="checkout" method="POST" action="$uri">
1.91      albertel  528: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  529: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  530: </form>
                    531: ENDCHECKOUT
                    532: }
                    533: 
1.252     albertel  534: sub firstaccess_msg {
1.253     albertel  535:     my ($time,$symb)=@_;
                    536:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    537:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    538:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.352     albertel  539:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.252     albertel  540:     return (<<ENDCHECKOUT);
1.253     albertel  541: <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  542: <form name="markaccess" method="POST" action="$uri">
1.252     albertel  543: <input type="hidden" name="markaccess" value="yes" />
                    544: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    545: </form>
                    546: ENDCHECKOUT
                    547: }
                    548: 
1.204     albertel  549: sub init_problem_globals {
                    550:     my ($type)=@_;
                    551:     #initialize globals
1.308     foxr      552:     #   For problems, we start out in part 0 (outside a <part> tag).
                    553:     #   and part 0 is used to describe the main body of the <problem>
                    554:     #
1.204     albertel  555:     if ($type eq 'problem') {
                    556: 	$Apache::inputtags::part='0';
                    557: 	@Apache::inputtags::partlist=('0');
1.266     albertel  558: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    559: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      560: 
1.266     albertel  561:     } elsif ($type eq 'library') {
1.204     albertel  562: 	$Apache::inputtags::part='';
                    563: 	@Apache::inputtags::partlist=();
                    564: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  565: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      566: 
1.304     albertel  567:     } elsif ($type eq 'Task') {
                    568: 	$Apache::inputtags::part='0';
                    569: 	@Apache::inputtags::partlist=('0');
                    570: 	$Apache::lonhomework::problemstatus='';	
                    571: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  572:     }
                    573:     @Apache::inputtags::responselist = ();
                    574:     @Apache::inputtags::importlist = ();
                    575:     @Apache::inputtags::previous=();
                    576:     @Apache::inputtags::previous_version=();
                    577:     $Apache::structuretags::printanswer='No';
                    578:     @Apache::structuretags::whileconds=();
                    579:     @Apache::structuretags::whilebody=();
                    580:     @Apache::structuretags::whileline=();
                    581:     $Apache::lonhomework::scantronmode=0;
                    582:     undef($Apache::lonhomework::name);
1.358     albertel  583:     undef($Apache::lonhomework::default_type);
                    584:     undef($Apache::lonhomework::type);
1.204     albertel  585: }
                    586: 
                    587: sub reset_problem_globals {
                    588:     my ($type)=@_;
                    589:     undef(%Apache::lonhomework::history);
                    590:     undef(%Apache::lonhomework::results);
                    591:     undef($Apache::inputtags::part);
1.208     albertel  592: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    593: #detect if we try to do 2 problems in one file
                    594: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  595:     undef($Apache::lonhomework::name);
1.358     albertel  596:     undef($Apache::lonhomework::default_type);
                    597:     undef($Apache::lonhomework::type);
                    598:     undef($Apache::lonhomework::scantronmode);
                    599:     undef($Apache::lonhomework::problemstatus);
                    600:     undef($Apache::lonhomework::ignore_response_errors);
1.204     albertel  601: }
                    602: 
1.241     albertel  603: sub set_problem_state {
1.240     albertel  604:     my ($part)=@_;
1.284     albertel  605:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  606: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    607: 	    'correct_by_student';
                    608:     }
                    609: }
                    610: 
1.241     albertel  611: sub get_problem_status {
                    612:     my ($part)=@_;
1.267     albertel  613:     my $problem_status;
1.284     albertel  614:     if ($env{'request.state'} eq 'construct' &&
                    615: 	defined($env{'form.problemstatus'})) {
                    616: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  617:     } else {
                    618: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    619: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  620: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  621:     }
                    622:     return $problem_status;
                    623: }
                    624: 
1.9       albertel  625: sub start_problem {
1.326     albertel  626:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  627: 
1.311     foxr      628:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  629:     if (!$Apache::lonxml::metamode) {
                    630: 	&Apache::lonxml::startredirection();
                    631:     }
1.311     foxr      632: 
1.308     foxr      633:     # Problems don't nest and we don't allow more than one <problem> in
                    634:     # a .problem file.
                    635:     #
1.184     albertel  636:     if ( $Apache::inputtags::part ne '' ||
                    637: 	 $Apache::lonhomework::parsing_a_problem) {
                    638: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  639: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  640: 	return '';
                    641:     }
1.184     albertel  642: 
                    643:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  644:     &init_problem_globals('problem');
1.166     albertel  645: 
1.284     albertel  646:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  647: 	$Apache::lonhomework::scantronmode=1;
                    648:     }
1.161     albertel  649: 
1.159     albertel  650:     if ($target ne 'analyze') {
                    651: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  652: 	if (($env{'request.state'} eq 'construct') &&
                    653: 	    defined($env{'form.problemtype'})) {
                    654: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  655: 	}
1.332     albertel  656: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  657:     }
1.164     albertel  658:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  659: 	my $uri=$env{'request.uri'};
1.159     albertel  660: 	if ($uri=~/\.(\w+)$/) {
                    661: 	    $Apache::lonhomework::type=$1;
                    662: 	    &Apache::lonxml::debug("Using type of $1");
                    663: 	} else {
                    664: 	    $Apache::lonhomework::type='problem';
                    665: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    666: 	}
1.87      albertel  667:     }
1.301     albertel  668:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       669: 
1.363     albertel  670:     &initialize_storage();
1.389     albertel  671:     if ($target ne 'analyze'
                    672:        	&& $env{'request.state'} eq 'construct') {
                    673: 	&set_problem_state('0');
                    674:     }
                    675: 
1.366     albertel  676:     if ($target eq 'web') {
                    677: 	&Apache::lonxml::debug(" grading history ");
                    678: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    679:     }
1.363     albertel  680: 
1.159     albertel  681:     #added vars to the scripting enviroment
1.213     albertel  682:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  683:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  684:     &Apache::run::run($expression,$safeeval);
1.159     albertel  685:     my $status;
                    686:     my $accessmsg;
                    687: 
1.343     albertel  688:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  689:     my ($result,$form_tag_start);
1.354     albertel  690:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    691: 	|| $target eq 'edit') {
1.350     albertel  692: 	($result,$form_tag_start) =
                    693: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    694: 			$name);
                    695:     }
                    696: 
1.284     albertel  697:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  698: 
                    699:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    700:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    701: 	$target eq 'tex') {
                    702: 	#handle exam checkout
                    703: 	if ($Apache::lonhomework::type eq 'exam') {
                    704: 	    my $token=
                    705: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  706: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  707: 		$token=&Apache::lonxml::maketoken();
                    708: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    709: 		    $token;
                    710: 	    }
1.343     albertel  711: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  712: 	}
1.284     albertel  713: 	if ($env{'form.markaccess'}) {
1.252     albertel  714: 	    &Apache::lonnet::set_first_access('map');
                    715: 	}
1.159     albertel  716: 	#handle rand seed in construction space
                    717: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  718: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  719: 	if ($env{'request.state'} ne "construct" && 
                    720: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  721: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    722: 		$rndseed.'" />'.
                    723: 		    '<input type="submit" name="resetdata"
1.334     albertel  724:                              value="'.&mt('New Problem Variation').'" />';
                    725: 	    if (exists($env{'form.username'})) {
                    726: 		$form_tag_start.=
1.164     albertel  727: 		    '<input type="hidden" name="username"
1.284     albertel  728:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  729: 	    }
1.333     albertel  730: 	    if ($env{'request.role.adv'}) {
1.267     albertel  731: 		$form_tag_start.=
1.300     albertel  732: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  733: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  734: 		    $form_tag_start.='checked="on"';
                    735: 		}
1.300     albertel  736: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    737: 		    '</label>';
1.267     albertel  738: 	    }
                    739: 	    $form_tag_start.='<hr />';
1.162     albertel  740: 	}
1.324     albertel  741: 
                    742: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    743: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  744: 	push (@Apache::inputtags::status,$status);
1.324     albertel  745: 
1.159     albertel  746: 	my $expression='$external::datestatus="'.$status.'";';
                    747: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    748: 	&Apache::run::run($expression,$safeeval);
                    749: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  750: 
1.159     albertel  751: 	if (( $status eq 'CLOSED' ) ||
                    752: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  753: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  754: 	    ( $status eq 'BANNED') ||
1.216     albertel  755: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  756: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  757: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  758: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    759: 						       $style);
1.159     albertel  760: 	    if ( $target eq "web" ) {
1.343     albertel  761: 		my $msg;
1.159     albertel  762: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  763: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  764: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  765: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  766: 		}
1.216     albertel  767: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       768: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  769: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  770: 		    $msg.=&checkout_msg();
1.252     albertel  771: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  772: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  773: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
                    774: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
1.159     albertel  775: 		}
                    776: 		$result.=$msg.'<br />';
                    777: 	    } elsif ($target eq 'tex') {
1.332     albertel  778: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    779: 		                    : '\begin{minipage}{\textwidth}';
                    780: 		$result.='\begin{document}\noindent \vskip 1 mm '.
                    781: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  782: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  783: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  784: 		} else {
1.211     albertel  785: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  786: 		}
                    787: 	    }
1.324     albertel  788: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  789: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    790: 						       $style);
1.324     albertel  791: 	    if ($target eq 'web') {
1.375     albertel  792: 		$result .= 
                    793: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  794: 	    } elsif ($target eq 'grade') {
                    795: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    796: 							'problem');
                    797: 	    }
1.159     albertel  798: 	} elsif ($target eq 'web') {
1.360     albertel  799: 	    if ($status eq 'CAN_ANSWER' 
                    800: 		&& $slot_name ne ''
                    801: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    802: 		# unproctored slot access, self checkin
                    803: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    804: 					      $slot_name);
                    805: 	    }
1.368     albertel  806: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  807: 	      '<input type="hidden" name="submitted" value="yes" />';
                    808: 	    # create a page header and exit
1.284     albertel  809: 	    if ($env{'request.state'} eq "construct") {
                    810: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  811: 	    }
                    812: 	    # if we are viewing someone else preserve that info
1.284     albertel  813: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  814: 		foreach my $field ('symb','courseid','domain','username') {
                    815: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  816: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  817: 		}
                    818: 	    }
                    819: 	} elsif ($target eq 'tex') {
1.319     foxr      820: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    821: 
1.99      sakharuk  822: 	}
1.159     albertel  823:     } elsif ($target eq 'edit') {
1.343     albertel  824: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel  825: 	$Apache::lonxml::warnings_error_header=
                    826: 	    &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  827: 	my $temp=&Apache::edit::insertlist($target,$token);
                    828: 	$result.=$temp;
                    829:     } elsif ($target eq 'modified') {
                    830: 	$result=$token->[4];
                    831:     } else {
                    832: 	# page_start returned a starting result, delete it if we don't need it
                    833: 	$result = '';
1.99      sakharuk  834:     }
1.159     albertel  835:     return $result;
1.9       albertel  836: }
                    837: 
                    838: sub end_problem {
1.159     albertel  839:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel  840:     my $result;
1.310     foxr      841: 
1.321     albertel  842:     if (!$Apache::lonxml::metamode) {
                    843: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel  844: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel  845:     }
1.319     foxr      846: 
                    847:     if ($target eq 'tex') {
1.321     albertel  848: 	# Figure out the front matter and replace the
                    849: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                    850: 	# this in end_problem because whether or not we display due
                    851: 	# dates depends on whether due dates have already been
                    852: 	# displayed in the problem parts.
                    853: 
1.319     foxr      854: 	my $frontmatter   = '';
                    855: 	my $startminipage = '';
                    856: 	if (not $env{'form.problem_split'}=~/yes/) {
                    857: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    858: 	}
                    859: 	my $id = $Apache::inputtags::part;
                    860: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    861: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    862: 	my @packages = split /,/,$packages;
                    863: 	my $allow_print_points = 0;
                    864: 	foreach my $partial_key (@packages) {
                    865: 	    if ($partial_key=~m/^part_0$/) {
                    866: 		$allow_print_points=1;
                    867: 	    }
                    868: 	}
                    869: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    870: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    871: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    872: 			'.disableexampointprint'}) eq 'yes') {
                    873: 	    $allow_print_points=0;
                    874: 	}
                    875: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    876: 	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 ';
                    877: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    878: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    879: 	
                    880: 	#  Figure out what the due date is and if we need to print
                    881: 	#  it in the problem header.  We have been logging the
                    882: 	#  last due date written to file. 
                    883: 	
                    884: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    885: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    886: 	my $temp_file;
                    887: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    888: 	
                    889: 	# Figure out what the last printed due date is or set it
                    890: 	# to the epoch if no duedates have been printed.
                    891: 	
                    892: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    893: 	if (-e $filename) {
                    894: 	    $temp_file = Apache::File->new($filename);
                    895: 	    my @due_file      = <$temp_file>;
                    896: 	    $due_file_content = $due_file[$#due_file];
                    897: 	    chomp $due_file_content;
                    898: 	} 
                    899: 	
                    900: 	# We display the due date iff it is not the same as the last
                    901: 	# duedate in problem header ($due_file_content), and
                    902: 	# none of our parts displayed a duedate.
                    903: 	#
                    904: 	my $parts_with_displayduedate;
                    905: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    906: 	    $parts_with_displayduedate = 
                    907: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    908: 	} else {
                    909: 	    $parts_with_displayduedate = 0;
                    910: 	}
                    911: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    912: 	    $temp_file = Apache::File->new('>'.$filename);
                    913: 	    print $temp_file "$duetime\n";
                    914: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    915: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    916: 		    $frontmatter .= $begin_doc.
                    917: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    918: 		} else {
                    919: 		    $frontmatter.= $begin_doc.$toc_line;
                    920: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    921: 		}
                    922: 	    } else {
1.381     albertel  923: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'.$startminipage;
1.319     foxr      924: 	    }
                    925: 	} else {
                    926: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    927: 		$frontmatter .= $begin_doc.$toc_line;
                    928: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    929: 	    } else {
1.381     albertel  930: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr      931: 	    }
                    932: 	}
                    933: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    934:     }
                    935: 
1.159     albertel  936:     my $status=$Apache::inputtags::status['-1'];
                    937:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    938: 	$target eq 'tex') {
1.249     albertel  939: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  940: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  941: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    942: 		&Apache::inputtags::grade;
1.324     albertel  943: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                    944: 		# no need to grade, and don't want to hide data
1.249     albertel  945: 	    } else {
                    946: 		# move any submission data to .hidden
                    947: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    948: 	    }
1.159     albertel  949: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    950: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  951: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  952: 	    # if part is zero, no <part>s existed, so we need show the current
                    953: 	    # grading status
                    954: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    955: 	    $result.= $gradestatus;
                    956: 	}
                    957: 	if (
1.284     albertel  958: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  959: 	    ($target eq 'answer') || ($target eq 'tex')
                    960: 	   ) {
1.227     albertel  961: 	    if ($target ne 'tex' &&
1.284     albertel  962: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       963: 		$result.="</form>";
1.348     albertel  964: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel  965: 	    }
                    966: 	    if ($target eq 'web') {
1.346     albertel  967: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel  968: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  969: 		my $endminipage = '';
1.284     albertel  970: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  971: 		    $endminipage = '\end{minipage}';
                    972: 		}
1.284     albertel  973:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  974: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel  975: 		} else {
1.262     sakharuk  976: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  977: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  978: 			$result .= $endminipage.'\end{document} ';
                    979: 		    } else {
1.382     albertel  980: 			$result .= $endminipage;
1.262     sakharuk  981: 		    }
1.159     albertel  982: 		}
                    983: 	    }
                    984: 	}
                    985: 	if ($target eq 'grade') {
                    986: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    987: 	    &finalize_storage();
                    988: 	}
1.284     albertel  989: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    990: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel  991: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel  992: 	                        # normally we get it from above, but in CSTR
1.172     albertel  993: 	                        # we always show answer mode too.
1.159     albertel  994: 	}
                    995:     } elsif ($target eq 'meta') {
                    996: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  997: 	    @Apache::inputtags::response=();
1.159     albertel  998: 	    $result=&Apache::response::mandatory_part_meta;
                    999: 	}
1.215     albertel 1000: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1001: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1002:     } elsif ($target eq 'edit') {
                   1003: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1004: 	$result .= &problem_edit_footer();
1.320     albertel 1005:     } elsif ($target eq 'modified') {
                   1006: 	 $result .= $token->[2];
1.159     albertel 1007:     }
1.155     albertel 1008: 
1.284     albertel 1009:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1010: 	&Apache::inputtags::check_for_duplicate_ids();
                   1011:     }
1.204     albertel 1012: 
                   1013:     &reset_problem_globals('problem');
1.159     albertel 1014: 
                   1015:     return $result;
1.48      albertel 1016: }
                   1017: 
1.108     albertel 1018: 
1.48      albertel 1019: sub start_library {
1.159     albertel 1020:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1021:     my ($result,$form_tag_start);
1.371     albertel 1022:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1023: 	&init_problem_globals('library');
                   1024: 	$Apache::lonhomework::type='problem';
                   1025:     }
1.159     albertel 1026:     if ($target eq 'edit') {
1.343     albertel 1027: 	($result,$form_tag_start)=
                   1028: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1029: 			'Edit');
                   1030: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1031: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1032: 	$result.=$temp;
                   1033:     } elsif ($target eq 'modified') {
                   1034: 	$result=$token->[4];
1.340     albertel 1035:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1036: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1037: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1038: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1039: 	($result,$form_tag_start)=
                   1040: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1041: 			$name);
1.159     albertel 1042: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1043: 	$result.=" \n $form_tag_start".	
1.159     albertel 1044: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1045: 	$result.=&problem_web_to_edit_header($rndseed);
                   1046:     }
                   1047:     return $result;
1.48      albertel 1048: }
                   1049: 
                   1050: sub end_library {
1.159     albertel 1051:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1052:     my $result='';
                   1053:     if ($target eq 'edit') {
                   1054: 	$result=&problem_edit_footer();
1.371     albertel 1055:     } elsif ($target eq 'web' 
                   1056: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1057: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1058: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1059:     }
1.371     albertel 1060:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1061: 	&reset_problem_globals('library');
                   1062:     }
1.159     albertel 1063:     return $result;
1.197     www      1064: }
                   1065: 
                   1066: sub start_definetag {
1.326     albertel 1067:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1068: 
                   1069:     my $result;
                   1070: 
                   1071:     my $name = $token->[2]->{'name'};
1.326     albertel 1072:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1073:     if ($target eq 'web') {
                   1074: 	if ($name=~/^\//) {
                   1075: 	    $result=
                   1076: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1077: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1078: 	} else {
                   1079: 	    $result=
                   1080: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1081: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1082: 	}
                   1083: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1084: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1085:     }
                   1086:     return $result;
                   1087: }
                   1088: 
                   1089: sub end_definetag {
                   1090:     return '';
1.1       albertel 1091: }
                   1092: 
                   1093: sub start_block {
1.201     albertel 1094:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1095: 
                   1096:     my $result;
1.1       albertel 1097: 
1.339     albertel 1098:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1099: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1100: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1101: 	if (defined($code) && $code ne '') {
1.137     albertel 1102: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1103: 		&Apache::lonxml::default_homework_load($safeeval);
                   1104: 	    }
1.131     albertel 1105: 	    $result = &Apache::run::run($code,$safeeval);
                   1106: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1107: 	} else {
                   1108: 	    $result='1';
                   1109: 	}
                   1110: 	if ( ! $result ) {
1.201     albertel 1111: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1112: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1113: 	}
                   1114: 	$result='';
                   1115:     } elsif ($target eq 'edit') {
                   1116: 	$result .=&Apache::edit::tag_start($target,$token);
                   1117: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1118: 					  $token,40);
                   1119: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1120:     } elsif ($target eq 'modified') {
                   1121: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1122: 						     $safeeval,'condition');
                   1123: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1124:     }
1.131     albertel 1125:     return $result;
1.1       albertel 1126: }
                   1127: 
                   1128: sub end_block {
1.167     www      1129:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1130:     my $result;
                   1131:     if ($target eq "edit") {
                   1132: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1133:     }
                   1134:     return $result;
                   1135: }
                   1136: 
                   1137: sub start_languageblock {
1.201     albertel 1138:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1139: 
                   1140:     my $result;
                   1141: 
1.339     albertel 1142:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1143: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1144: 	my $include = $token->[2]->{'include'};
                   1145: 	my $exclude = $token->[2]->{'exclude'};
1.398     www      1146:         my @preferred_languages=&Apache::loncommon::preferred_languages();
1.394     www      1147: # This should not even happen, since we should at least have the server language
1.398     www      1148:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1149: # Now loop over all languages in order of preference
                   1150:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1151: # If the languageblock has no arguments, show the contents
1.399   ! www      1152:            $result=1;
        !          1153:            my $found=0;
1.394     www      1154: # Do we have an include argument?
1.398     www      1155: 	   if ($include) {
1.394     www      1156: # If include is specified, by default, don't render the block
1.399   ! www      1157:               $result=0;
1.398     www      1158:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1159: # ... but if my preferred language is included, render it
1.398     www      1160:                  if ($included_language eq $preferred_language) {
1.399   ! www      1161:                     $result=1; 
        !          1162:                     $found=1; 
1.398     www      1163:                  }
                   1164:               }
                   1165: 	   }
1.394     www      1166: # Do we have an exclude argument?
1.398     www      1167:            if ($exclude) {
1.399   ! www      1168:               $result=1;
1.398     www      1169:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1170:                  if ($excluded_language eq $preferred_language) {
1.399   ! www      1171:                     $result=0;
        !          1172:                     $found=1;
1.398     www      1173:                  }
                   1174:               }
                   1175: 	   }
1.399   ! www      1176:            if ($found) { last; }
1.398     www      1177:         }
1.201     albertel 1178: 	if ( ! $result ) {
                   1179: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1180: 						   $style);
                   1181: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1182: 	}
                   1183: 	$result='';
1.167     www      1184:     } elsif ($target eq 'edit') {
                   1185: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1186: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1187: 					  $token,40);
1.211     albertel 1188: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1189: 					  $token,40);
                   1190: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1191:     } elsif ($target eq 'modified') {
                   1192: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1193: 						     $safeeval,'include',
                   1194: 						     'exclude');
1.167     www      1195: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1196:     }
                   1197:     return $result;
                   1198: }
                   1199: 
                   1200: sub end_languageblock {
1.170     www      1201:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1202:     my $result;
1.201     albertel 1203:     if ($target eq "edit") {
1.170     www      1204: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1205:     }
                   1206:     return $result;
                   1207: }
                   1208: 
1.397     albertel 1209: {
                   1210:     my %available_texts;
                   1211:     sub start_translated {
                   1212: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1213: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1214: 	undef(%available_texts);
                   1215:     }
                   1216:     
                   1217:     sub end_translated {
                   1218: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1219: 	my $result;
                   1220: 	#show the translation on viewable targets
                   1221: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1222: 	    # or non-viewable targets, if it's embedded in something that
                   1223: 	    # wants the output
                   1224: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1225: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1226: 	    my @possibilities = keys(%available_texts);
                   1227: 	    my $which = 
                   1228: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1229: 	    $result = $available_texts{$which};
                   1230: 	}
                   1231: 	undef(%available_texts);
                   1232: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1233: 	return $result;
                   1234:     }
                   1235: 
                   1236: 
                   1237:     sub start_lang {
                   1238: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1239: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1240: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1241: 	    &Apache::lonxml::startredirection();
                   1242: 	}
                   1243: 	return '';
                   1244:     }
                   1245: 
                   1246:     sub end_lang {
                   1247: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1248: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1249: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1250: 	    my $result = &Apache::lonxml::endredirection();
                   1251: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1252: 						   $safeeval);
                   1253: 	    $available_texts{$which} = $result;
                   1254: 	}
                   1255: 	return '';
                   1256:     }
                   1257: }
                   1258: 
1.170     www      1259: sub start_instructorcomment {
1.201     albertel 1260:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1261: 
                   1262:     my $result;
                   1263: 
1.339     albertel 1264:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1265: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1266:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1267: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1268: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1269: 						   $parser,$style);
1.170     www      1270: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1271: 	}
                   1272: 	$result='';
                   1273:     } elsif ($target eq 'edit') {
                   1274: 	$result .=&Apache::edit::tag_start($target,$token);
                   1275: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1276:     }
                   1277:     return $result;
                   1278: }
                   1279: 
                   1280: sub end_instructorcomment {
1.159     albertel 1281:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1282:     my $result;
                   1283:     if ($target eq "edit") {
                   1284: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1285:     }
                   1286:     return $result;
1.4       tsai     1287: }
                   1288: 
                   1289: sub start_while {
1.326     albertel 1290:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1291: 
1.160     albertel 1292:     my $result;
1.339     albertel 1293:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1294: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1295: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1296: 
1.160     albertel 1297: 	push( @Apache::structuretags::whileconds, $code);
                   1298: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1299: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1300: 	}
                   1301: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1302: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1303: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1304: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1305: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1306: 	if ( $result ) {
                   1307: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1308: 	}
                   1309:     } elsif ($target eq 'edit') {
                   1310: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1311: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1312: 					  $token,40);
                   1313: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1314:     } elsif ($target eq 'modified') {
                   1315: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1316: 						     $safeeval,'condition');
                   1317: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1318:     }
1.160     albertel 1319:     return $result;
1.4       tsai     1320: }
                   1321: 
                   1322: sub end_while {
1.159     albertel 1323:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1324:     my $result;
                   1325: 
1.339     albertel 1326:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1327: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1328: 	my $code = pop(@Apache::structuretags::whileconds);
                   1329: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1330: 	my $line = pop(@Apache::structuretags::whileline);
                   1331: 	my $return = &Apache::run::run($code,$safeeval);
                   1332: 	my $starttime=time;
                   1333: 	my $error=0;
                   1334: 	while ($return) {
                   1335: 	    if (time-$starttime >
                   1336: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1337: 		$return = 0; $error=1; next;
1.161     albertel 1338: 	    }
                   1339: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1340: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1341: 		$target eq 'analyze') {
                   1342: 		# grade/answer/analyze should produce no output but if we
                   1343: 		# are redirecting, the redirecter should know what to do
                   1344: 		# with the output
                   1345: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1346: 	    }
1.161     albertel 1347: 	    $return = &Apache::run::run($code,$safeeval);
                   1348: 	}
                   1349: 	if ($error) {
1.270     albertel 1350: 	    &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 1351: 	}
                   1352:     } elsif ($target eq "edit") {
                   1353: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1354:     }
1.160     albertel 1355:     return $result;
1.1       albertel 1356: }
1.6       tsai     1357: 
1.160     albertel 1358: # <randomlist show="1">
1.6       tsai     1359: #  <tag1>..</tag1>
                   1360: #  <tag2>..</tag2>
                   1361: #  <tag3>..</tag3>
1.160     albertel 1362: #  ...
1.6       tsai     1363: # </randomlist>
                   1364: sub start_randomlist {
1.326     albertel 1365:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1366:     my $result;
1.339     albertel 1367:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1368: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1369: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1370: 	my $b_parser= HTML::LCParser->new(\$body);
                   1371: 	$b_parser->xml_mode(1);
                   1372: 	$b_parser->marked_sections(1);
1.159     albertel 1373: 	my $b_tok;
                   1374: 	my @randomlist;
                   1375: 	my $list_item;
                   1376: 	while($b_tok = $b_parser->get_token() ) {
                   1377: 	    if($b_tok->[0] eq 'S') { # start tag
                   1378: 		# get content of the tag until matching end tag
                   1379: 		# get all text upto the matching tag
                   1380: 		# and push the content into @randomlist
                   1381: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1382: 							   $b_parser);
                   1383: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1384: 		push(@randomlist,$list_item);
                   1385: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1386:                 #         $list_item</b>";
                   1387: 	    }
                   1388: 	    if($b_tok->[0] eq 'T') { # text
                   1389: 		# what to do with text in between tags?
                   1390: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1391: 	    }
                   1392: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1393: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1394: 	    # }
                   1395: 	}
1.303     albertel 1396: 	if (@randomlist) {
                   1397: 	    my @idx_arr = (0 .. $#randomlist);
                   1398: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1399: 	    my $bodytext = '';
                   1400: 	    my $show=$#randomlist;
                   1401: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1402: 	    $showarg--;
                   1403: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1404: 	    for(0 .. $show) {
                   1405: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1406: 	    }
                   1407: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1408: 	}
                   1409:     } elsif ($target eq 'edit' ) {
                   1410: 	$result .=&Apache::edit::tag_start($target,$token);
                   1411: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1412: 					   $token,5);
                   1413: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1414:     } elsif ($target eq 'modified' ) {
                   1415: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1416: 						     $safeeval,'show');
                   1417: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1418:     }
                   1419:     return $result;
1.7       tsai     1420: }
                   1421: 
                   1422: sub shuffle {
                   1423:     my $a=shift;
                   1424:     my $i;
1.303     albertel 1425:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1426: 	&Apache::response::pushrandomnumber();
1.159     albertel 1427: 	for($i=@$a;--$i;) {
                   1428: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1429: 	    next if $i == $j;
                   1430: 	    @$a[$i,$j] = @$a[$j,$i];
                   1431: 	}
1.251     albertel 1432: 	&Apache::response::poprandomnumber();
1.7       tsai     1433:     }
1.6       tsai     1434: }
                   1435: 
                   1436: sub end_randomlist {
1.159     albertel 1437:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1438:     my $result;
                   1439:     if ($target eq 'edit' ) {
                   1440: 	$result=&Apache::edit::tag_end($target,$token,
                   1441: 				       'End Randomly Parsed Block');
                   1442:     }
                   1443:     return $result;
1.6       tsai     1444: }
                   1445: 
1.283     albertel 1446: sub ordered_show_check {
                   1447:     my $last_part=$Apache::inputtags::partlist[-2];
                   1448:     my $in_order=
                   1449: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1450:     my $in_order_show=1;
                   1451:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1452: 	$in_order_show=&Apache::response::check_status($last_part);
                   1453:     }
                   1454:     return $in_order_show;
                   1455: }
                   1456: 
1.11      albertel 1457: sub start_part {
1.326     albertel 1458:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1459:     if (!$Apache::lonxml::metamode) {
                   1460: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1461: 	                                     # duedates.
                   1462:     }
1.159     albertel 1463:     my $result='';
1.386     albertel 1464:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1465:     $Apache::inputtags::part=$id;
1.177     albertel 1466:     push(@Apache::inputtags::partlist,$id);
                   1467:     @Apache::inputtags::response=();
1.159     albertel 1468:     @Apache::inputtags::previous=();
                   1469:     @Apache::inputtags::previous_version=();
1.241     albertel 1470:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1471:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1472:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1473:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1474:     my $in_order_show=&ordered_show_check();
1.214     albertel 1475:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1476:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1477:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1478: 
                   1479:     if ($target eq 'meta') {
1.224     www      1480: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1481: 	return &Apache::response::mandatory_part_meta.
                   1482: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1483:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1484: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1485: 	if ($hidden || !$in_order_show) {
1.326     albertel 1486: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1487: 	} else {
                   1488: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1489: 	    push (@Apache::inputtags::status,$status);
                   1490: 	    my $expression='$external::datestatus="'.$status.'";';
                   1491: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1492: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1493: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1494: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1495: 	    }
1.216     albertel 1496: 	    if (( $status eq 'CLOSED' ) ||
                   1497: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1498: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1499: 		( $status eq 'BANNED') ||
                   1500: 		( $status eq 'UNAVAILABLE') ||
                   1501: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1502: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1503: 							   $style);
1.159     albertel 1504: 		if ( $target eq "web" ) {
1.211     albertel 1505: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1506: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1507: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1508: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1509: 		    } else {
1.211     albertel 1510: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1511: 		    }
1.159     albertel 1512: 		}
                   1513: 	    } else {
                   1514: 		if ($target eq 'tex') {
1.284     albertel 1515: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1516: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1517: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1518: 			} else {
                   1519: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1520: 			}
1.195     sakharuk 1521: 		    }
1.159     albertel 1522: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1523: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1524: 		    my @allkeys = split /,/,$allkeys;
                   1525: 		    my $allow_print_points = 0;
                   1526: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1527: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1528: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1529: 			}
                   1530: 		    }
1.275     albertel 1531: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1532: 		    if (defined($maxtries) && $maxtries < 0) {
                   1533: 			$allow_print_points=0;
                   1534: 		    }
1.302     albertel 1535: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1536: 				    '.disableexampointprint'}) eq 'yes') {
                   1537: 			$allow_print_points=0;
                   1538: 		    }
1.222     sakharuk 1539: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1540: 		} elsif ($target eq 'web') {
1.356     www      1541: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1542: 		}
                   1543: 	    }
                   1544: 	}
                   1545:     } elsif ($target eq 'edit') {
                   1546: 	$result.=&Apache::edit::tag_start($target,$token);
                   1547: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1548: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1549: 	    '&nbsp;&nbsp;'.
                   1550: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1551: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1552:     } elsif ($target eq 'modified') {
                   1553: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1554: 						     $safeeval,'id','display');
1.159     albertel 1555: 	if ($constructtag) {
1.225     albertel 1556: 	    #limiting ids to only letters numbers, and space
1.224     www      1557: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1558: 	    $result = &Apache::edit::rebuild_tag($token);
                   1559: 	}
                   1560:     }
                   1561:     return $result;
1.11      albertel 1562: }
                   1563: 
                   1564: sub end_part {
1.159     albertel 1565:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1566:     &Apache::lonxml::debug("in end_part $target ");
                   1567:     my $status=$Apache::inputtags::status['-1'];
                   1568:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1569:     my $in_order_show=&ordered_show_check();
1.321     albertel 1570:     my $result;
                   1571:     if (!$Apache::lonxml::metamode) {
                   1572: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1573: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1574:     }
1.312     albertel 1575:     if ($target eq 'grade') {
1.249     albertel 1576: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1577: 	    !$hidden && $in_order_show) {
1.311     foxr     1578: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1579: 	} else {
                   1580: 	    # move any submission data to .hidden
                   1581: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1582: 	}
1.283     albertel 1583:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1584: 	     !$hidden && $in_order_show) {
1.159     albertel 1585: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1586: 							$target);
1.212     albertel 1587: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1588: 	    $gradestatus='';
                   1589: 	}
1.311     foxr     1590: 	$result.=$gradestatus;
1.265     sakharuk 1591: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1592:     } elsif ($target eq 'edit') {
1.311     foxr     1593: 	$result.=&Apache::edit::end_table();
1.322     albertel 1594:     } elsif ($target eq 'modified') {
                   1595: 	 $result .= $token->[2];
1.159     albertel 1596:     }
                   1597:     pop @Apache::inputtags::status;
                   1598:     $Apache::inputtags::part='';
1.295     albertel 1599:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1600:     return $result;
1.11      albertel 1601: }
1.1       albertel 1602: 
1.25      albertel 1603: sub start_preduedate {
1.326     albertel 1604:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1605:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1606: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1607: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1608: 	if (!$Apache::lonhomework::scantronmode &&
                   1609: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1610: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1611: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1612: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1613: 	}
1.24      albertel 1614:     }
1.159     albertel 1615:     return '';
1.24      albertel 1616: }
                   1617: 
1.25      albertel 1618: sub end_preduedate {
1.159     albertel 1619:     return '';
1.24      albertel 1620: }
                   1621: 
1.369     foxr     1622: # In all the modes where <postanswerdate> text is 
                   1623: # displayable,  all we do is eat up the text between the start/stop
                   1624: # tags if the conditions are not right to display it.
1.25      albertel 1625: sub start_postanswerdate {
1.326     albertel 1626:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1627:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1628: 	&Apache::lonnet::allowed('pav',
                   1629: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1630:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1631: 	$target eq 'tex' ) {
1.300     albertel 1632: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1633: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1634: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1635: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1636: 	}
                   1637:     }
                   1638:     return '';
1.24      albertel 1639: }
                   1640: 
1.25      albertel 1641: sub end_postanswerdate {
1.159     albertel 1642:     return '';
1.24      albertel 1643: }
                   1644: 
1.25      albertel 1645: sub start_notsolved {
1.326     albertel 1646:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1647:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1648: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1649: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1650: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1651: 	if ($gradestatus =~ /^correct/ &&
                   1652: 	    &Apache::response::show_answer()) {
1.159     albertel 1653: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1654: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1655: 	}
1.24      albertel 1656:     }
1.159     albertel 1657:     return '';
1.24      albertel 1658: }
                   1659: 
1.25      albertel 1660: sub end_notsolved {
1.159     albertel 1661:     return '';
1.24      albertel 1662: }
                   1663: 
                   1664: sub start_solved {
1.326     albertel 1665:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1666:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1667: 	$target eq 'tex') {
                   1668: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1669: 	if ($gradestatus !~ /^correct/ ||
                   1670: 	    !&Apache::response::show_answer()) {
1.326     albertel 1671: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1672: 	}
1.24      albertel 1673:     }
1.159     albertel 1674:     return '';
1.24      albertel 1675: }
                   1676: 
                   1677: sub end_solved {
1.248     albertel 1678:     return '';
                   1679: }
                   1680: 
                   1681: sub start_problemtype {
1.326     albertel 1682:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1683:     my $result;
1.339     albertel 1684:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1685: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1686: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1687: 	if (!defined($mode)) { $mode='show'; }
                   1688: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1689: 	my $found=0;
                   1690: 	foreach my $type (split(',',$for)) {
                   1691: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1692: 	}
                   1693: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1694: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1695: 	}
                   1696: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1697: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1698: 	}
                   1699:     } elsif ($target eq 'edit') {
                   1700: 	$result .=&Apache::edit::tag_start($target,$token);
                   1701: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1702: 					   [['show','Show'],
                   1703: 					    ['hide','Hide']]
                   1704: 					   ,$token);
                   1705: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1706: 					     [ ['exam','Exam/Quiz Problem'],
                   1707: 					       ['survey','Survey'],
                   1708: 					       ['problem','Homework Problem'] ]
                   1709: 					     ,$token);
                   1710: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1711:     } elsif ($target eq 'modified') {
                   1712: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1713: 						     $safeeval,'mode','for');
                   1714: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1715:     }
                   1716:     return $result;
                   1717: }
                   1718: 
                   1719: sub end_problemtype {
1.159     albertel 1720:     return '';
1.24      albertel 1721: }
1.34      albertel 1722: 
                   1723: sub start_startouttext {
1.159     albertel 1724:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1725:     my @result=(''.'');
                   1726:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1727:     return (@result);
1.34      albertel 1728: }
1.159     albertel 1729: 
1.34      albertel 1730: sub end_startouttext {
1.326     albertel 1731:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1732:     my $result='';
                   1733:     my $text='';
                   1734: 
                   1735:     if ($target eq 'edit') {
1.326     albertel 1736: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.211     albertel 1737: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1738: <td>".&mt('Delete:').
1.159     albertel 1739:                  &Apache::edit::deletelist($target,$token)
                   1740: 		 ."</td>
1.42      albertel 1741: <td>".
1.159     albertel 1742:                  &Apache::edit::insertlist($target,$token).
1.362     albertel 1743: 		 '</td><td align="right" valign="top">' .
                   1744: 		 &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1745: 		 &Apache::edit::end_row().
1.362     albertel 1746:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1747: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1748:     }
                   1749:     if ($target eq 'modified') {
1.219     albertel 1750: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1751:     }
                   1752:     if ($target eq 'tex') {
                   1753: 	$result .= '\noindent ';
                   1754:     }
                   1755:     return $result;
1.34      albertel 1756: }
1.159     albertel 1757: 
1.34      albertel 1758: sub start_endouttext {
1.159     albertel 1759:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1760:     my $result='';
                   1761:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1762:     if ($target eq "modified") {
                   1763: 	$result='<endouttext />'.
1.377     albertel 1764: 	    &Apache::edit::handle_insertafter('startouttext');
                   1765:     }
1.159     albertel 1766:     return $result;
1.34      albertel 1767: }
1.159     albertel 1768: 
1.34      albertel 1769: sub end_endouttext {
1.159     albertel 1770:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1771:     my @result=('','');
                   1772:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1773:     return (@result);
1.34      albertel 1774: }
1.159     albertel 1775: 
1.45      albertel 1776: sub delete_startouttext {
1.326     albertel 1777:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1778:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 1779:     my $text=$$parser['-1']->get_text("/endouttext");
                   1780:     my $ntoken=$$parser['-1']->get_token();
                   1781:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1782:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1783:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1784:     # they did the last time round
                   1785:     &Apache::lonxml::increasedepth($ntoken);
                   1786:     &Apache::lonxml::decreasedepth($ntoken);
                   1787:     return 1;
1.193     www      1788: }
                   1789: 
                   1790: sub start_simpleeditbutton {
                   1791:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1792:     my $result='';
1.284     albertel 1793:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1794: 	($target eq 'web') &&
1.330     albertel 1795:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 1796:         my $url=$env{'request.noversionuri'};
1.193     www      1797:         $url=~s/\?.*$//;
1.367     albertel 1798: 	my ($symb) = &Apache::lonnet::whichuser();
1.194     www      1799: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.356     www      1800:                 '<a href="'.$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      1801: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1802:     }
                   1803:     return $result;
                   1804: }
                   1805: 
                   1806: sub end_simpleeditbutton {
                   1807:     return '';
1.45      albertel 1808: }
1.34      albertel 1809: 
1.1       albertel 1810: 1;
                   1811: __END__

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