Annotation of loncom/homework/structuretags.pm, revision 1.446

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.446   ! bisitz      4: # $Id: structuretags.pm,v 1.445 2009/05/15 14:48:35 bisitz Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.254     www        28: ###
1.54      www        29: 
1.435     jms        30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
                     34: Apache::structuretags
                     35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: 
                     39: This is part of the LearningOnline Network with CAPA project
                     40: described at http://www.lon-capa.org.
                     41: 
                     42: 
                     43: =head1 NOTABLE SUBROUTINES
                     44: 
                     45: =over
                     46: 
                     47: =item 
                     48: 
                     49: =back
                     50: 
                     51: =cut
                     52: 
1.133     sakharuk   53: 
1.1       albertel   54: package Apache::structuretags; 
                     55: 
                     56: use strict;
                     57: use Apache::lonnet;
1.101     sakharuk   58: use Apache::File();
1.147     www        59: use Apache::lonmenu;
1.210     albertel   60: use Apache::lonlocal;
1.231     sakharuk   61: use Apache::lonxml;
1.434     foxr       62: use Apache::londefdef;
1.338     albertel   63: use Apache::lonenc();
1.267     albertel   64: use Time::HiRes qw( gettimeofday tv_interval );
1.356     www        65: use lib '/home/httpd/lib/perl/';
                     66: use LONCAPA;
                     67:  
1.78      harris41   68: BEGIN {
1.397     albertel   69:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
1.10      albertel   70: }
                     71: 
                     72: sub start_web {
1.326     albertel   73:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.383     albertel   74:     if ($target ne 'edit' && $target ne 'modified') {
                     75: 	my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
                     76: 	if ($target eq 'web' || $target eq 'webgrade') {
                     77: 	    return $bodytext;
                     78: 	}
                     79:     } elsif ($target eq "edit" ) {
                     80: 	my $bodytext = 
                     81: 	    &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
                     82: 	my $result = &Apache::edit::tag_start($target,$token);
                     83: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                     84: 	return $result;
                     85:     } elsif ( $target eq "modified" ) {
                     86: 	return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
1.159     albertel   87:     }
                     88:     return '';
1.10      albertel   89: }
                     90: 
                     91: sub end_web {
1.44      ng         92:     return '';
1.10      albertel   93: }
                     94: 
                     95: sub start_tex {
1.326     albertel   96:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.198     sakharuk   97:     my $result='';
1.383     albertel   98:     if ($target ne 'edit' && $target ne 'modified') {
                     99: 	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
                    100: 	if ($target eq 'tex') {
1.434     foxr      101: 	    
                    102: 	    # If inside a table, occurrences of \\ must be removed;
                    103: 	    # else the table blows up.
                    104: 
                    105: 	    if (&Apache::londefdef::is_inside_of($tagstack, "table")) {
                    106: 		$bodytext =~ s/\\\\//g;
                    107: 	    }
1.432     foxr      108: 	    return $bodytext.'{}';
1.383     albertel  109: 	}
                    110:     } elsif ($target eq "edit" ) {
                    111: 	my $bodytext = 
                    112: 	    &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
                    113: 	my $result = &Apache::edit::tag_start($target,$token);
                    114: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                    115: 	return $result;
                    116:     } elsif ( $target eq "modified" ) {
                    117: 	return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
1.159     albertel  118:     }
1.198     sakharuk  119:     return $result;;
1.10      albertel  120: }
                    121: 
                    122: sub end_tex {
1.44      ng        123:     return '';
1.9       albertel  124: }
                    125: 
1.400     albertel  126: sub homework_js {
                    127:     return &Apache::loncommon::resize_textarea_js().
1.416     raeburn   128:            &setmode_javascript().
1.400     albertel  129: 	<<'JS';
                    130: <script type="text/javascript">
                    131: function setSubmittedPart (part) {
                    132:    this.document.lonhomework.submitted.value="part_"+part;
                    133: }
                    134: 
                    135: function image_response_click (which, e) {
                    136:     init_geometry();
                    137:     if (!e) { e = window.event; } //IE
                    138:     var input_element = document.lonhomework.elements[which];
1.401     albertel  139:     var token_element = document.lonhomework.elements[which+'_token'];
1.400     albertel  140:     var token = token_element.value;
1.401     albertel  141:     var img_element   = document.getElementById(which+'_imageresponse');
1.400     albertel  142:     var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
                    143:     var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
                    144:     var click = x+':'+y;
                    145:     input_element.value = click;
                    146:     img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
                    147: }
1.416     raeburn   148: 
1.400     albertel  149: </script>
                    150: JS
                    151: }
                    152: 
1.416     raeburn   153: sub setmode_javascript {
                    154:     return <<"ENDSCRIPT";
                    155: <script type="text/javascript">
                    156: function setmode(form,probmode) {
                    157:     form.problemmode.value = probmode;
                    158:     form.submit();
                    159: }
                    160: </script>
                    161: ENDSCRIPT
                    162: }
                    163: 
1.48      albertel  164: sub page_start {
1.345     albertel  165:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                    166: 	$extra_head)=@_;
1.159     albertel  167:     my %found;
1.207     albertel  168:     foreach my $taginside (@$tagstack) {
1.159     albertel  169: 	foreach my $taglookedfor ('html','body','form') {
                    170: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    171: 	}
                    172:     }
                    173: 
1.343     albertel  174:     if ($target eq 'tex') {
                    175: 	return
                    176: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                    177: 					   $parstack,$parser,$safeeval);
                    178:     }
                    179: 
1.400     albertel  180:     $extra_head .= &homework_js();
1.374     albertel  181: 
1.434     foxr      182:     if ($env{'environment.wysiwygeditor'} eq 'on') {
                    183: 	$extra_head .= &Apache::lonhtmlcommon::dragmath_js("FCKEditMathPopup");
                    184:     } else {
                    185:         $extra_head .= &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
1.425     raeburn   186:     }
                    187: 
1.344     albertel  188:     my %body_args;
                    189:     if (defined($found{'html'})) {
                    190: 	$body_args{'skip_phases'}{'head'}=1;
                    191:     } else {
1.343     albertel  192: 	
1.345     albertel  193: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel  194: 
1.379     albertel  195: 	$extra_head .= &Apache::londefdef::generate_css_links();
                    196: 
1.384     albertel  197: 	if ($env{'request.state'} eq 'construct') {
1.343     albertel  198: 	    $extra_head.=&Apache::edit::js_change_detection().
                    199: 		"<script type=\"text/javascript\">\n".
                    200: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    201: 		&Apache::loncommon::browser_and_searcher_javascript().
                    202:                 "\n</script>\n";
                    203: 	}
1.159     albertel  204:     }
1.343     albertel  205: 
1.446   ! bisitz    206:     my $pageheader = '';
1.344     albertel  207:     if (defined($found{'body'})) {
                    208: 	$body_args{'skip_phases'}{'body'}=1;
                    209:     } elsif (!defined($found{'body'}) 
                    210: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  211: 	if ($target eq 'web' || $target eq 'edit') {
1.402     albertel  212: 	    if ($env{'environment.remote'} ne 'off') {
                    213: 		$body_args{'only_body'}  = 1;
                    214: 	    }
1.446   ! bisitz    215:         $pageheader = &Apache::lonhtmlcommon::breadcrumbs() # FIXME add breadcrumbs
        !           216:                      .&Apache::loncommon::head_subbox(
        !           217:                 &Apache::loncommon::CSTR_pageheader());
1.297     albertel  218: 	}
1.272     albertel  219:     } elsif (!defined($found{'body'})) {
1.343     albertel  220: 	my %add_entries;
1.159     albertel  221: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    222: 						  $safeeval);
1.343     albertel  223: 	if ($background ne '' ) {
                    224: 	    $add_entries{'background'} = $background;
                    225: 	}
1.344     albertel  226: 
1.290     albertel  227: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    228: 					       $safeeval);
1.446   ! bisitz    229:         if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
1.344     albertel  230: 
1.446   ! bisitz    231:         $body_args{'bgcolor'}        = $bgcolor;
        !           232:         # $body_args{'no_title'}       = 1;
        !           233:         $body_args{'force_register'} = 1;
        !           234:         $body_args{'add_entries'}    = \%add_entries;
        !           235:         if ($env{'environment.remote'} eq 'off'
        !           236:             && $env{'request.state'} eq   'construct') {
        !           237:             $body_args{'only_body'}  = 1;
        !           238:         }
1.344     albertel  239:     }
1.365     albertel  240:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  241:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    242: 						    \%body_args);
1.446   ! bisitz    243:     $page_start .= $pageheader;
1.344     albertel  244:     if (!defined($found{'body'}) 
                    245: 	&& $env{'request.state'} ne 'construct'
                    246: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    247: 
1.367     albertel  248: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
1.344     albertel  249: 	if ($symb eq '' && !$publicuser) {
                    250: 	    my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
                    251: 	    $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
                    252: 	    $page_start .= $help;
1.159     albertel  253: 	}
1.344     albertel  254:     }
                    255: 
1.409     albertel  256:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  257: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  258:     }
1.344     albertel  259:     
1.159     albertel  260:     my $form_tag_start;
                    261:     if (!defined($found{'form'})) {
1.337     albertel  262: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.338     albertel  263: 	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.327     albertel  264: 	$form_tag_start.=$uri.'" ';
                    265: 	if ($target eq 'edit') {
                    266: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    267: 	}
1.368     albertel  268: 	$form_tag_start.='>'."\n";
1.355     albertel  269: 
                    270: 	my $symb=&Apache::lonnet::symbread();
                    271: 	if ($symb =~ /\S/) {
                    272: 	    $symb=
                    273: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    274: 	    $form_tag_start.=
1.368     albertel  275: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  276: 	}
1.159     albertel  277:     }
1.343     albertel  278:     return ($page_start,$form_tag_start);
1.105     albertel  279: }
                    280: 
1.141     matthew   281: #use Time::HiRes();
1.105     albertel  282: sub get_resource_name {
1.159     albertel  283:     my ($parstack,$safeeval)=@_;
1.388     foxr      284:     my $name;
1.204     albertel  285:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      286: 	$name = $Apache::lonhomework::name;
                    287:     } else {
                    288: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  289: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      290: 	if ($name eq '') {
                    291: 	    $name=&Apache::lonnet::EXT('resource.title');
                    292: 	    if ($name eq 'con_lost') { $name = ''; }
                    293: 	}
                    294: 	if ($name!~/\S+/) {
                    295: 	    $name=$env{'request.uri'};
                    296: 	    $name=~s-.*/([^/]+)$-$1-;
                    297: 	}
                    298: 	# The name has had html tags escaped:
                    299:        
                    300: 	$name=~s/&lt;/</gs;
                    301: 	$name=~s/&gt;/>/gs;
                    302: 
                    303: 	$Apache::lonhomework::name=$name;
1.204     albertel  304:     }
1.159     albertel  305:     return $name;
1.105     albertel  306: }
                    307: 
                    308: sub setup_rndseed {
1.159     albertel  309:     my ($safeeval)=@_;
                    310:     my $rndseed;
1.367     albertel  311:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  312:     if ($env{'request.state'} eq "construct" 
                    313: 	|| $symb eq '' 
                    314: 	|| $Apache::lonhomework::type eq 'practice'
                    315: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       316: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  317: 						['rndseed']);
1.284     albertel  318: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  319: 	if (!$rndseed) {
1.162     albertel  320: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    321: 	    if (!$rndseed) {
                    322: 		$rndseed=time;
                    323: 	    }
1.284     albertel  324: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  325: 	}
1.374     albertel  326: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    327: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  328: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  329: 	    srand(time);
                    330: 	    $rndseed=int(rand(2100000000));
1.284     albertel  331: 	    $env{'form.rndseed'}=$rndseed;
                    332: 	    delete($env{'form.resetdata'});
                    333: 	    delete($env{'form.newrandomization'});
1.159     albertel  334: 	}
1.187     albertel  335: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  336: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  337:         }
1.247     albertel  338:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    339: 	   $rndseed=&Apache::lonnet::rndseed();
                    340: 	}
1.221     albertel  341: 	if ($safeeval) {
                    342: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  343: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  344: 	}
1.159     albertel  345:     }
                    346:     return $rndseed;
1.105     albertel  347: }
                    348: 
1.268     albertel  349: sub remember_problem_state {
                    350:     return '
1.284     albertel  351:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    352:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    353:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  354: }
                    355: 
1.423     www       356: sub problem_edit_buttons {
                    357:    return  '
1.408     albertel  358: <div class="LC_edit_problem_discards">
1.416     raeburn   359:        <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
1.423     www       360:        ' onclick="javscript:setmode(this.form,'."'discard'".')"  />
1.416     raeburn   361:        <input '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'editxml'".')').' type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" />
1.407     albertel  362:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.408     albertel  363: </div>
                    364: <div class="LC_edit_problem_saves">
1.416     raeburn   365:        <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save and Edit').'" />
                    366:        <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
1.423     www       367: </div>';
                    368: }
                    369: 
                    370: sub problem_edit_header {
                    371:     return '<input type="hidden" name="submitted" value="edit" /><input type="hidden" name="problemmode" value="edit" />'.
                    372: 	&Apache::structuretags::remember_problem_state().'
                    373: <div class="LC_edit_problem_header">
                    374: <div class="LC_edit_problem_header_title">
                    375: '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    376: </div>'.
                    377: &problem_edit_buttons().'
1.408     albertel  378: <hr class="LC_edit_problem_divide" />
1.409     albertel  379: '.&Apache::lonxml::message_location().'
1.408     albertel  380: </div>
                    381: '.
1.282     albertel  382:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  383: }
                    384: 
                    385: sub problem_edit_footer {
1.412     albertel  386:     return '</td></tr></table><br />
                    387: <div class="LC_edit_problem_footer">
1.423     www       388:   <hr class="LC_edit_problem_divide" />'.
                    389: &problem_edit_buttons().'
1.412     albertel  390:   <hr class="LC_edit_problem_divide" />
                    391: </div>
                    392: '.
                    393: 
1.348     albertel  394:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  395:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  396: }
                    397: 
1.235     albertel  398: sub option {
                    399:     my ($value,$name) = @_;
                    400:     my $result ="<option value='".$value."' ";
1.284     albertel  401:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  402: 	$result.=" selected='on' ";
                    403:     }
                    404:     $result.='>';
                    405:     return $result;
                    406: }
                    407: 
1.105     albertel  408: sub problem_web_to_edit_header {
1.159     albertel  409:     my ($rndseed)=@_;
1.406     albertel  410:     my $result .= '<div class="LC_edit_problem_header">';
                    411: 
                    412:     if (!$Apache::lonhomework::parsing_a_task) {
                    413: 	$result .= 
                    414: 	    '<div class="LC_edit_problem_header_title">'.
                    415: 	    &mt('Problem Testing').
                    416: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    417: 	    '</div>';
                    418:     } else {
                    419: 	$result .= 
                    420: 	    '<div class="LC_edit_problem_header_title">'.
                    421: 	    &mt('Task Testing').
                    422: 	    '</div>';
                    423:     }
                    424:     
1.315     albertel  425:     my $show_all_foils_text = 
                    426: 	($Apache::lonhomework::parsing_a_task) ?
                    427: 	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
                    428: 	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    429: 
1.440     bisitz    430:     my $show_all= '<span class="LC_nobreak"><label><input type="checkbox" name="showallfoils"';
                    431:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.406     albertel  432:     $show_all.= ' />'.$show_all_foils_text.'</label></span>';
                    433: 
                    434: 
1.384     albertel  435: 
1.406     albertel  436:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  437:     if (!$Apache::lonhomework::parsing_a_task) {
                    438: 	$result.="
1.406     albertel  439: <div class='LC_edit_problem_header_row1'>
                    440: <span class=\"LC_nobreak\">
1.405     albertel  441: ".&mt("Problem Status:")."
1.235     albertel  442: <select name='problemstate'>
1.270     albertel  443:   <option value=''></option>
1.235     albertel  444:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    445:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    446:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    447:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    448:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    449: </select>
1.406     albertel  450: </span>
                    451: <span class=\"LC_nobreak\">
1.405     albertel  452: ".&mt("Problem Type:")."
1.235     albertel  453: <select name='problemtype'>
1.270     albertel  454:   <option value=''></option>
1.242     albertel  455:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   456:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  457:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.428     raeburn   458:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.235     albertel  459: </select>
1.406     albertel  460: </span>
                    461: $show_all
                    462: </div>
                    463: <div class='LC_edit_problem_header_row2'>
                    464: <span class=\"LC_nobreak\">
1.405     albertel  465: ".&mt("Feedback Mode:")."
1.235     albertel  466: <select name='problemstatus'>
                    467:   <option value=''></option>
1.242     albertel  468:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  469:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    470:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  471: </select>
1.406     albertel  472: </span>
                    473: ";
                    474: 
1.376     albertel  475:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    476: 	$result.="
1.406     albertel  477: <div class='LC_edit_problem_header_row1'>
                    478: <span class=\"LC_nobreak\">
1.405     albertel  479: ".&mt("Problem Status:")."
1.376     albertel  480: <select name='problemstate'>
                    481:   <option value=''></option>
                    482:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    483:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    484:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    485:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    486: </select>
1.406     albertel  487: </span>
                    488: $show_all
                    489: ";
                    490:     }
                    491:     $result.='
                    492:        <span class="LC_nobreak">
                    493:        '.&mt('Apply style file: ').'
                    494:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    495:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    496:        </span>
1.422     www       497:      </div>
                    498:      <div class="LC_edit_problem_header_row1">'.
                    499:        &Apache::lonxml::renderingoptions().'
1.406     albertel  500:      </div>
                    501:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    502:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    503:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    504:    </div>
                    505:    <hr class="LC_edit_problem_divide" />
                    506:    <div class="LC_edit_problem_header_randomize_row">
                    507:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    508:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
                    509:      <input type="text" name="rndseed" size="10" value="'.
                    510: 	       $rndseed.'"
                    511:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    512: 
                    513:     if (!$Apache::lonhomework::parsing_a_task) {
                    514: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    515: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  516: 	$result .= '<span class="LC_nobreak">'.
                    517: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   518: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    519:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    520:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  521: 		$numtoanalyze.'" size="5" />').
                    522: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    523: 		'</span>';
                    524: 						    
1.313     albertel  525:     }
1.406     albertel  526: 
                    527:     $result.='
                    528:    </div>
1.408     albertel  529:    <div class="LC_edit_problem_header_edit_row">';
1.416     raeburn   530:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    531:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    532:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    533:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    534:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  535:     $result.='
                    536:    </div>
1.409     albertel  537:    '.&Apache::lonxml::message_location().'
1.406     albertel  538: </div>';
1.159     albertel  539:     return $result;
1.48      albertel  540: }
                    541: 
1.65      albertel  542: sub initialize_storage {
1.357     albertel  543:     my ($given_symb) = @_;
1.353     albertel  544:     undef(%Apache::lonhomework::results);
                    545:     undef(%Apache::lonhomework::history);
1.357     albertel  546:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  547: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  548:     
                    549:     # anonymous users (CODEd exams) have no data
                    550:     if ($name eq 'anonymous' 
                    551: 	&& !defined($domain)) {
                    552: 	return;
                    553:     }
                    554: 
1.333     albertel  555:     if ($env{'request.state'} eq 'construct' 
                    556: 	|| $symb eq ''
                    557: 	|| $Apache::lonhomework::type eq 'practice') {
                    558: 	
                    559: 	my $namespace = $symb || $env{'request.uri'};
                    560: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  561: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    562: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  563: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    564: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    565: 	    &Apache::lonxml::debug("Attempt reset");
                    566: 	}
1.159     albertel  567: 	%Apache::lonhomework::history=
1.333     albertel  568: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  569: 	my ($temp)=keys %Apache::lonhomework::history ;
                    570: 	&Apache::lonxml::debug("Return message of $temp");
                    571:     } else {
                    572: 	%Apache::lonhomework::history=
                    573: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    574:     }
1.353     albertel  575: 
1.159     albertel  576:     #ignore error conditions
1.67      albertel  577:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  578:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  579: }
                    580: 
1.435     jms       581: =pod
                    582: 
                    583: =item finalize_storage()
                    584: 
                    585: 	Stores away the result has to a student's environment
                    586: 	checks form.grade_ for specific values, other wises stores
                    587: 	to the running users environment
                    588: 	Will increment totals for attempts, students, and corrects
                    589: 	if running user has student role.
                    590: 	
                    591: =cut
                    592: 
                    593: 
1.65      albertel  594: sub finalize_storage {
1.357     albertel  595:     my ($given_symb) = @_;
1.159     albertel  596:     my $result;
1.289     albertel  597:     if (%Apache::lonhomework::results) {
1.323     albertel  598: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    599: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  600: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  601: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  602: 	if ($env{'request.state'} eq 'construct' 
                    603: 	    || $symb eq ''
                    604: 	    || $Apache::lonhomework::type eq 'practice') {
                    605: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  606: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  607: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  608: 					      $namespace,'',$domain,$name);
1.159     albertel  609: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    610: 	} else {
                    611: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    612: 					    $symb,$courseid,$domain,$name);
                    613: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   614:             if ($env{'request.role'} =~/^st/) {
                    615:                 &store_aggregates($symb,$courseid);
                    616:             }
1.159     albertel  617: 	}
1.323     albertel  618:     } else {
                    619: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  620:     }
1.159     albertel  621:     return $result;
1.65      albertel  622: }
                    623: 
1.435     jms       624: =pod
                    625: 
                    626: item store_aggregates()
                    627: 
                    628: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                    629: 	for the course. Increments total number of attempts, unique students 
                    630: 	and corrects for each part for an instance of a problem, as appropriate.
                    631: 	
                    632: =cut
                    633: 
1.285     raeburn   634: sub store_aggregates {
                    635:     my ($symb,$courseid) = @_;
1.286     albertel  636:     my %aggregate;
                    637:     my @parts;
1.288     albertel  638:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    639:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  640:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  641:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  642:             push(@parts, $1);
1.285     raeburn   643:         }
                    644:     }
1.286     albertel  645:     foreach my $part (@parts) {
                    646:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    647: 	    eq 'APPROX_ANS' ||
                    648: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    649: 	    eq 'EXACT_ANS') {
1.287     albertel  650:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   651:         }
1.286     albertel  652:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  653:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   654:         } else {
1.293     albertel  655:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   656:             if ($last_reset) {
1.293     albertel  657:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   658:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    659:                 }
                    660:             }
1.285     raeburn   661:         }
1.287     albertel  662:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   663:     }
1.292     raeburn   664:     if (keys (%aggregate) > 0) {
1.289     albertel  665: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   666:                             $cdomain,$cname);
                    667:     }
                    668: }
1.289     albertel  669: 
1.65      albertel  670: sub checkout_msg {
1.211     albertel  671:     my %lt=&Apache::lonlocal::texthash( 
                    672: 		'resource'=>'The resource needs to be checked out',
                    673: 		'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.',
                    674:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    675:                 'checkout'=>'Check out Exam for Viewing',
                    676: 		'checkout?'=>'Check out Exam?');
1.352     albertel  677:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  678:     return (<<ENDCHECKOUT);
1.211     albertel  679: <h2>$lt{'resource'}</h2>
                    680:     <p>$lt{'id_expln'}</p>
                    681: <font color="red">
                    682: <p>$lt{'warning'}</p>
1.91      albertel  683: </font>
1.444     bisitz    684: <form name="checkout" method="post" action="$uri">
1.91      albertel  685: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  686: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  687: </form>
                    688: ENDCHECKOUT
                    689: }
                    690: 
1.252     albertel  691: sub firstaccess_msg {
1.253     albertel  692:     my ($time,$symb)=@_;
1.414     albertel  693:     my $result;
                    694:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    695:     if ($interval[1] eq 'map') {
                    696: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                    697: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                    698:     
                    699: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.418     bisitz    700: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    701:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    702:                              ,$foldertitle,$time)."</h2>";
1.414     albertel  703:     } elsif ($interval[1] eq 'course') {
                    704: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.418     bisitz    705:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    706:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    707:                              ,$course,$time)."</h2>";
1.414     albertel  708:     } else {
                    709: 	my $title=&Apache::lonnet::gettitle($symb);
1.418     bisitz    710:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
                    711:                              .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                    712:                              ,$title,$time)."</h2>";
1.414     albertel  713:     }
1.352     albertel  714:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz    715:     my $buttontext = &mt('Show Resource');
                    716:     my $timertext = &mt('Start Timer?');
1.414     albertel  717:     $result .= (<<ENDCHECKOUT);
1.444     bisitz    718: <form name="markaccess" method="post" action="$uri">
1.252     albertel  719: <input type="hidden" name="markaccess" value="yes" />
1.418     bisitz    720: <input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel  721: </form>
                    722: ENDCHECKOUT
1.414     albertel  723:     return $result;
1.252     albertel  724: }
                    725: 
1.204     albertel  726: sub init_problem_globals {
                    727:     my ($type)=@_;
                    728:     #initialize globals
1.308     foxr      729:     #   For problems, we start out in part 0 (outside a <part> tag).
                    730:     #   and part 0 is used to describe the main body of the <problem>
                    731:     #
1.204     albertel  732:     if ($type eq 'problem') {
                    733: 	$Apache::inputtags::part='0';
                    734: 	@Apache::inputtags::partlist=('0');
1.405     albertel  735: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel  736: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      737: 
1.266     albertel  738:     } elsif ($type eq 'library') {
1.204     albertel  739: 	$Apache::inputtags::part='';
                    740: 	@Apache::inputtags::partlist=();
1.405     albertel  741: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel  742: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      743: 
1.304     albertel  744:     } elsif ($type eq 'Task') {
                    745: 	$Apache::inputtags::part='0';
                    746: 	@Apache::inputtags::partlist=('0');
1.405     albertel  747: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel  748: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  749:     }
                    750:     @Apache::inputtags::responselist = ();
                    751:     @Apache::inputtags::importlist = ();
                    752:     @Apache::inputtags::previous=();
                    753:     @Apache::inputtags::previous_version=();
                    754:     $Apache::structuretags::printanswer='No';
                    755:     @Apache::structuretags::whileconds=();
                    756:     @Apache::structuretags::whilebody=();
                    757:     @Apache::structuretags::whileline=();
                    758:     $Apache::lonhomework::scantronmode=0;
                    759:     undef($Apache::lonhomework::name);
1.358     albertel  760:     undef($Apache::lonhomework::default_type);
                    761:     undef($Apache::lonhomework::type);
1.204     albertel  762: }
                    763: 
                    764: sub reset_problem_globals {
                    765:     my ($type)=@_;
                    766:     undef(%Apache::lonhomework::history);
                    767:     undef(%Apache::lonhomework::results);
                    768:     undef($Apache::inputtags::part);
1.208     albertel  769: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    770: #detect if we try to do 2 problems in one file
                    771: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  772:     undef($Apache::lonhomework::name);
1.358     albertel  773:     undef($Apache::lonhomework::default_type);
                    774:     undef($Apache::lonhomework::type);
                    775:     undef($Apache::lonhomework::scantronmode);
                    776:     undef($Apache::lonhomework::ignore_response_errors);
1.405     albertel  777:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel  778: }
                    779: 
1.241     albertel  780: sub set_problem_state {
1.240     albertel  781:     my ($part)=@_;
1.284     albertel  782:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  783: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    784: 	    'correct_by_student';
                    785:     }
                    786: }
                    787: 
1.241     albertel  788: sub get_problem_status {
                    789:     my ($part)=@_;
1.267     albertel  790:     my $problem_status;
1.284     albertel  791:     if ($env{'request.state'} eq 'construct' &&
                    792: 	defined($env{'form.problemstatus'})) {
                    793: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  794:     } else {
                    795: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    796: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  797: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  798:     }
                    799:     return $problem_status;
                    800: }
                    801: 
1.9       albertel  802: sub start_problem {
1.326     albertel  803:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  804: 
1.311     foxr      805:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  806:     if (!$Apache::lonxml::metamode) {
                    807: 	&Apache::lonxml::startredirection();
                    808:     }
1.311     foxr      809: 
1.308     foxr      810:     # Problems don't nest and we don't allow more than one <problem> in
                    811:     # a .problem file.
                    812:     #
1.184     albertel  813:     if ( $Apache::inputtags::part ne '' ||
                    814: 	 $Apache::lonhomework::parsing_a_problem) {
                    815: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  816: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  817: 	return '';
                    818:     }
1.184     albertel  819: 
                    820:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  821:     &init_problem_globals('problem');
1.166     albertel  822: 
1.284     albertel  823:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  824: 	$Apache::lonhomework::scantronmode=1;
                    825:     }
1.161     albertel  826: 
1.159     albertel  827:     if ($target ne 'analyze') {
1.415     raeburn   828:         my $type = &Apache::lonnet::EXT('resource.0.type');
                    829: 	$Apache::lonhomework::type=$type;
1.284     albertel  830: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel  831: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel  832: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  833: 	}
1.332     albertel  834: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  835:     }
1.164     albertel  836:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  837: 	my $uri=$env{'request.uri'};
1.159     albertel  838: 	if ($uri=~/\.(\w+)$/) {
                    839: 	    $Apache::lonhomework::type=$1;
                    840: 	    &Apache::lonxml::debug("Using type of $1");
                    841: 	} else {
                    842: 	    $Apache::lonhomework::type='problem';
                    843: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    844: 	}
1.87      albertel  845:     }
1.301     albertel  846:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       847: 
1.363     albertel  848:     &initialize_storage();
1.389     albertel  849:     if ($target ne 'analyze'
                    850:        	&& $env{'request.state'} eq 'construct') {
                    851: 	&set_problem_state('0');
                    852:     }
                    853: 
1.366     albertel  854:     if ($target eq 'web') {
                    855: 	&Apache::lonxml::debug(" grading history ");
                    856: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    857:     }
1.363     albertel  858: 
1.159     albertel  859:     #added vars to the scripting enviroment
1.213     albertel  860:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  861:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  862:     &Apache::run::run($expression,$safeeval);
1.159     albertel  863:     my $status;
                    864:     my $accessmsg;
                    865: 
1.343     albertel  866:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  867:     my ($result,$form_tag_start);
1.354     albertel  868:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    869: 	|| $target eq 'edit') {
1.350     albertel  870: 	($result,$form_tag_start) =
                    871: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    872: 			$name);
                    873:     }
                    874: 
1.284     albertel  875:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  876: 
                    877:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    878:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    879: 	$target eq 'tex') {
                    880: 	#handle exam checkout
                    881: 	if ($Apache::lonhomework::type eq 'exam') {
                    882: 	    my $token=
                    883: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  884: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  885: 		$token=&Apache::lonxml::maketoken();
                    886: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    887: 		    $token;
                    888: 	    }
1.343     albertel  889: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  890: 	}
1.284     albertel  891: 	if ($env{'form.markaccess'}) {
1.414     albertel  892: 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    893: 	    &Apache::lonnet::set_first_access($interval[1]);
1.252     albertel  894: 	}
1.159     albertel  895: 	#handle rand seed in construction space
                    896: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  897: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  898: 	if ($env{'request.state'} ne "construct" && 
                    899: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  900: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    901: 		$rndseed.'" />'.
                    902: 		    '<input type="submit" name="resetdata"
1.334     albertel  903:                              value="'.&mt('New Problem Variation').'" />';
                    904: 	    if (exists($env{'form.username'})) {
                    905: 		$form_tag_start.=
1.164     albertel  906: 		    '<input type="hidden" name="username"
1.284     albertel  907:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  908: 	    }
1.333     albertel  909: 	    if ($env{'request.role.adv'}) {
1.267     albertel  910: 		$form_tag_start.=
1.440     bisitz    911: 		    ' <label><input type="checkbox" name="showallfoils"';
1.284     albertel  912: 		if (defined($env{'form.showallfoils'})) {
1.440     bisitz    913: 		    $form_tag_start.=' checked="checked"';
1.267     albertel  914: 		}
1.300     albertel  915: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    916: 		    '</label>';
1.267     albertel  917: 	    }
1.417     www       918:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn   919:                 $form_tag_start.=&practice_problem_header();
1.417     www       920:             }
1.267     albertel  921: 	    $form_tag_start.='<hr />';
1.162     albertel  922: 	}
1.324     albertel  923: 
                    924: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    925: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  926: 	push (@Apache::inputtags::status,$status);
1.324     albertel  927: 
1.159     albertel  928: 	my $expression='$external::datestatus="'.$status.'";';
                    929: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    930: 	&Apache::run::run($expression,$safeeval);
                    931: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  932: 
1.159     albertel  933: 	if (( $status eq 'CLOSED' ) ||
                    934: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  935: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  936: 	    ( $status eq 'BANNED') ||
1.216     albertel  937: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  938: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  939: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  940: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    941: 						       $style);
1.159     albertel  942: 	    if ( $target eq "web" ) {
1.343     albertel  943: 		my $msg;
1.159     albertel  944: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  945: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.441     raeburn   946:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                    947:                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
1.253     albertel  948: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  949: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  950: 		}
1.216     albertel  951: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       952: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  953: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  954: 		    $msg.=&checkout_msg();
1.252     albertel  955: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  956: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  957: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn   958: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.159     albertel  959: 		}
                    960: 		$result.=$msg.'<br />';
                    961: 	    } elsif ($target eq 'tex') {
1.332     albertel  962: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    963: 		                    : '\begin{minipage}{\textwidth}';
1.443     foxr      964: 		$result.='\noindent \vskip 1 mm '.
1.332     albertel  965: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  966: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  967: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  968: 		} else {
1.211     albertel  969: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  970: 		}
                    971: 	    }
1.324     albertel  972: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  973: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    974: 						       $style);
1.324     albertel  975: 	    if ($target eq 'web') {
1.375     albertel  976: 		$result .= 
                    977: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  978: 	    } elsif ($target eq 'grade') {
                    979: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    980: 							'problem');
                    981: 	    }
1.159     albertel  982: 	} elsif ($target eq 'web') {
1.360     albertel  983: 	    if ($status eq 'CAN_ANSWER' 
                    984: 		&& $slot_name ne ''
                    985: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    986: 		# unproctored slot access, self checkin
                    987: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    988: 					      $slot_name);
                    989: 	    }
1.368     albertel  990: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  991: 	      '<input type="hidden" name="submitted" value="yes" />';
                    992: 	    # create a page header and exit
1.284     albertel  993: 	    if ($env{'request.state'} eq "construct") {
                    994: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn   995:                 if ($Apache::lonhomework::type eq 'practice') {
                    996:                     $result.= '<input type="submit" name="resetdata" '.
                    997:                               'value="'.&mt('New Problem Variation').'" />'.
                    998:                               &practice_problem_header().'<hr />';
                    999:                 }
1.227     albertel 1000: 	    }
                   1001: 	    # if we are viewing someone else preserve that info
1.284     albertel 1002: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel 1003: 		foreach my $field ('symb','courseid','domain','username') {
                   1004: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1005: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1006: 		}
                   1007: 	    }
                   1008: 	} elsif ($target eq 'tex') {
1.319     foxr     1009: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                   1010: 
1.99      sakharuk 1011: 	}
1.159     albertel 1012:     } elsif ($target eq 'edit') {
1.343     albertel 1013: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1014: 	$Apache::lonxml::warnings_error_header=
                   1015: 	    &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 1016: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1017: 	$result.=$temp;
                   1018:     } elsif ($target eq 'modified') {
                   1019: 	$result=$token->[4];
                   1020:     } else {
                   1021: 	# page_start returned a starting result, delete it if we don't need it
                   1022: 	$result = '';
1.99      sakharuk 1023:     }
1.159     albertel 1024:     return $result;
1.9       albertel 1025: }
                   1026: 
                   1027: sub end_problem {
1.159     albertel 1028:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1029:     my $result;
1.310     foxr     1030: 
1.321     albertel 1031:     if (!$Apache::lonxml::metamode) {
                   1032: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1033: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1034:     }
1.319     foxr     1035: 
                   1036:     if ($target eq 'tex') {
1.321     albertel 1037: 	# Figure out the front matter and replace the
                   1038: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1039: 	# this in end_problem because whether or not we display due
                   1040: 	# dates depends on whether due dates have already been
                   1041: 	# displayed in the problem parts.
                   1042: 
1.319     foxr     1043: 	my $frontmatter   = '';
                   1044: 	my $startminipage = '';
                   1045: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1046: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1047: 	}
                   1048: 	my $id = $Apache::inputtags::part;
                   1049: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1050: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1051: 	my @packages = split /,/,$packages;
                   1052: 	my $allow_print_points = 0;
                   1053: 	foreach my $partial_key (@packages) {
                   1054: 	    if ($partial_key=~m/^part_0$/) {
                   1055: 		$allow_print_points=1;
                   1056: 	    }
                   1057: 	}
                   1058: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1059: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1060: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1061: 			'.disableexampointprint'}) eq 'yes') {
                   1062: 	    $allow_print_points=0;
                   1063: 	}
                   1064: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.443     foxr     1065: 	my $begin_doc=' \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
1.319     foxr     1066: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1067: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1068: 	
                   1069: 	#  Figure out what the due date is and if we need to print
                   1070: 	#  it in the problem header.  We have been logging the
                   1071: 	#  last due date written to file. 
                   1072: 	
                   1073: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                   1074: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                   1075: 	my $temp_file;
                   1076: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1077: 	
                   1078: 	# Figure out what the last printed due date is or set it
                   1079: 	# to the epoch if no duedates have been printed.
                   1080: 	
                   1081: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1082: 	if (-e $filename) {
                   1083: 	    $temp_file = Apache::File->new($filename);
                   1084: 	    my @due_file      = <$temp_file>;
                   1085: 	    $due_file_content = $due_file[$#due_file];
                   1086: 	    chomp $due_file_content;
                   1087: 	} 
                   1088: 	
                   1089: 	# We display the due date iff it is not the same as the last
                   1090: 	# duedate in problem header ($due_file_content), and
                   1091: 	# none of our parts displayed a duedate.
                   1092: 	#
                   1093: 	my $parts_with_displayduedate;
                   1094: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1095: 	    $parts_with_displayduedate = 
                   1096: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1097: 	} else {
                   1098: 	    $parts_with_displayduedate = 0;
                   1099: 	}
                   1100: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1101: 	    $temp_file = Apache::File->new('>'.$filename);
                   1102: 	    print $temp_file "$duetime\n";
                   1103: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1104: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1105: 		    $frontmatter .= $begin_doc.
                   1106: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                   1107: 		} else {
                   1108: 		    $frontmatter.= $begin_doc.$toc_line;
                   1109: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1110: 		}
                   1111: 	    } else {
1.381     albertel 1112: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'.$startminipage;
1.319     foxr     1113: 	    }
                   1114: 	} else {
                   1115: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1116: 		$frontmatter .= $begin_doc.$toc_line;
                   1117: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1118: 	    } else {
1.381     albertel 1119: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1120: 	    }
                   1121: 	}
                   1122: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1123:     }
                   1124: 
1.159     albertel 1125:     my $status=$Apache::inputtags::status['-1'];
                   1126:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1127: 	$target eq 'tex') {
1.249     albertel 1128: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1129: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1130: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1131: 		&Apache::inputtags::grade;
1.324     albertel 1132: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1133: 		# no need to grade, and don't want to hide data
1.249     albertel 1134: 	    } else {
                   1135: 		# move any submission data to .hidden
                   1136: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1137: 	    }
1.159     albertel 1138: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1139: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1140: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1141: 	    # if part is zero, no <part>s existed, so we need show the current
                   1142: 	    # grading status
                   1143: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1144: 	    $result.= $gradestatus;
                   1145: 	}
                   1146: 	if (
1.284     albertel 1147: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1148: 	    ($target eq 'answer') || ($target eq 'tex')
                   1149: 	   ) {
1.227     albertel 1150: 	    if ($target ne 'tex' &&
1.284     albertel 1151: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1152: 		$result.="</form>";
1.348     albertel 1153: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel 1154: 	    }
                   1155: 	    if ($target eq 'web') {
1.346     albertel 1156: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1157: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1158: 		my $endminipage = '';
1.284     albertel 1159: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1160: 		    $endminipage = '\end{minipage}';
                   1161: 		}
1.284     albertel 1162:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1163: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1164: 		} else {
1.262     sakharuk 1165: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1166: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1167: 			$result .= $endminipage.'\end{document} ';
                   1168: 		    } else {
1.382     albertel 1169: 			$result .= $endminipage;
1.262     sakharuk 1170: 		    }
1.159     albertel 1171: 		}
                   1172: 	    }
                   1173: 	}
                   1174: 	if ($target eq 'grade') {
                   1175: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1176: 	    &finalize_storage();
                   1177: 	}
1.284     albertel 1178: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1179: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1180: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1181: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1182: 	                        # we always show answer mode too.
1.159     albertel 1183: 	}
                   1184:     } elsif ($target eq 'meta') {
                   1185: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1186: 	    @Apache::inputtags::response=();
1.159     albertel 1187: 	    $result=&Apache::response::mandatory_part_meta;
                   1188: 	}
1.215     albertel 1189: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1190: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1191:     } elsif ($target eq 'edit') {
                   1192: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1193: 	$result .= &problem_edit_footer();
1.320     albertel 1194:     } elsif ($target eq 'modified') {
                   1195: 	 $result .= $token->[2];
1.159     albertel 1196:     }
1.155     albertel 1197: 
1.284     albertel 1198:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1199: 	&Apache::inputtags::check_for_duplicate_ids();
                   1200:     }
1.204     albertel 1201: 
                   1202:     &reset_problem_globals('problem');
1.159     albertel 1203: 
                   1204:     return $result;
1.48      albertel 1205: }
                   1206: 
1.108     albertel 1207: 
1.48      albertel 1208: sub start_library {
1.159     albertel 1209:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1210:     my ($result,$form_tag_start);
1.371     albertel 1211:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1212: 	&init_problem_globals('library');
                   1213: 	$Apache::lonhomework::type='problem';
                   1214:     }
1.159     albertel 1215:     if ($target eq 'edit') {
1.343     albertel 1216: 	($result,$form_tag_start)=
                   1217: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1218: 			'Edit');
                   1219: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1220: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1221: 	$result.=$temp;
                   1222:     } elsif ($target eq 'modified') {
                   1223: 	$result=$token->[4];
1.340     albertel 1224:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1225: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1226: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1227: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1228: 	($result,$form_tag_start)=
                   1229: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1230: 			$name);
1.159     albertel 1231: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1232: 	$result.=" \n $form_tag_start".	
1.159     albertel 1233: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1234: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1235:         if ($Apache::lonhomework::type eq 'practice') {
                   1236:             $result.= '<input type="submit" name="resetdata" '.
                   1237:                       'value="'.&mt('New Problem Variation').'" />'.
                   1238:                       &practice_problem_header().'<hr />';
                   1239:         }
1.159     albertel 1240:     }
                   1241:     return $result;
1.48      albertel 1242: }
                   1243: 
                   1244: sub end_library {
1.159     albertel 1245:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1246:     my $result='';
                   1247:     if ($target eq 'edit') {
                   1248: 	$result=&problem_edit_footer();
1.371     albertel 1249:     } elsif ($target eq 'web' 
                   1250: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1251: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1252: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1253:     }
1.371     albertel 1254:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1255: 	&reset_problem_globals('library');
                   1256:     }
1.159     albertel 1257:     return $result;
1.197     www      1258: }
                   1259: 
                   1260: sub start_definetag {
1.326     albertel 1261:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1262: 
                   1263:     my $result;
                   1264: 
                   1265:     my $name = $token->[2]->{'name'};
1.326     albertel 1266:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1267:     if ($target eq 'web') {
                   1268: 	if ($name=~/^\//) {
                   1269: 	    $result=
                   1270: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1271: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1272: 	} else {
                   1273: 	    $result=
                   1274: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1275: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1276: 	}
                   1277: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1278: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1279:     }
                   1280:     return $result;
                   1281: }
                   1282: 
                   1283: sub end_definetag {
                   1284:     return '';
1.1       albertel 1285: }
                   1286: 
                   1287: sub start_block {
1.201     albertel 1288:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1289: 
                   1290:     my $result;
1.1       albertel 1291: 
1.339     albertel 1292:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1293: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1294: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1295: 	if (defined($code) && $code ne '') {
1.137     albertel 1296: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1297: 		&Apache::lonxml::default_homework_load($safeeval);
                   1298: 	    }
1.131     albertel 1299: 	    $result = &Apache::run::run($code,$safeeval);
                   1300: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1301: 	} else {
                   1302: 	    $result='1';
                   1303: 	}
                   1304: 	if ( ! $result ) {
1.201     albertel 1305: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1306: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1307: 	}
                   1308: 	$result='';
                   1309:     } elsif ($target eq 'edit') {
                   1310: 	$result .=&Apache::edit::tag_start($target,$token);
                   1311: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   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); }
1.38      albertel 1318:     }
1.131     albertel 1319:     return $result;
1.1       albertel 1320: }
                   1321: 
                   1322: sub end_block {
1.167     www      1323:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1324:     my $result;
                   1325:     if ($target eq "edit") {
                   1326: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1327:     }
                   1328:     return $result;
                   1329: }
                   1330: 
                   1331: sub start_languageblock {
1.201     albertel 1332:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1333: 
                   1334:     my $result;
                   1335: 
1.339     albertel 1336:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1337: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1338: 	my $include = $token->[2]->{'include'};
                   1339: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1340:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.394     www      1341: # This should not even happen, since we should at least have the server language
1.398     www      1342:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1343: # Now loop over all languages in order of preference
                   1344:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1345: # If the languageblock has no arguments, show the contents
1.399     www      1346:            $result=1;
                   1347:            my $found=0;
1.394     www      1348: # Do we have an include argument?
1.398     www      1349: 	   if ($include) {
1.394     www      1350: # If include is specified, by default, don't render the block
1.399     www      1351:               $result=0;
1.398     www      1352:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1353: # ... but if my preferred language is included, render it
1.398     www      1354:                  if ($included_language eq $preferred_language) {
1.399     www      1355:                     $result=1; 
                   1356:                     $found=1; 
1.398     www      1357:                  }
                   1358:               }
                   1359: 	   }
1.394     www      1360: # Do we have an exclude argument?
1.398     www      1361:            if ($exclude) {
1.399     www      1362:               $result=1;
1.398     www      1363:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1364:                  if ($excluded_language eq $preferred_language) {
1.399     www      1365:                     $result=0;
                   1366:                     $found=1;
1.398     www      1367:                  }
                   1368:               }
                   1369: 	   }
1.399     www      1370:            if ($found) { last; }
1.398     www      1371:         }
1.201     albertel 1372: 	if ( ! $result ) {
                   1373: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1374: 						   $style);
                   1375: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1376: 	}
                   1377: 	$result='';
1.167     www      1378:     } elsif ($target eq 'edit') {
                   1379: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1380: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1381: 					  $token,40);
1.211     albertel 1382: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1383: 					  $token,40);
                   1384: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1385:     } elsif ($target eq 'modified') {
                   1386: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1387: 						     $safeeval,'include',
                   1388: 						     'exclude');
1.167     www      1389: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1390:     }
                   1391:     return $result;
                   1392: }
                   1393: 
                   1394: sub end_languageblock {
1.170     www      1395:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1396:     my $result;
1.201     albertel 1397:     if ($target eq "edit") {
1.170     www      1398: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1399:     }
                   1400:     return $result;
                   1401: }
                   1402: 
1.397     albertel 1403: {
                   1404:     my %available_texts;
                   1405:     sub start_translated {
                   1406: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1407: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1408: 	undef(%available_texts);
                   1409:     }
                   1410:     
                   1411:     sub end_translated {
                   1412: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1413: 	my $result;
                   1414: 	#show the translation on viewable targets
                   1415: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1416: 	    # or non-viewable targets, if it's embedded in something that
                   1417: 	    # wants the output
                   1418: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1419: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1420: 	    my @possibilities = keys(%available_texts);
                   1421: 	    my $which = 
                   1422: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1423: 	    $result = $available_texts{$which};
                   1424: 	}
                   1425: 	undef(%available_texts);
                   1426: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1427: 	return $result;
                   1428:     }
                   1429: 
                   1430: 
                   1431:     sub start_lang {
                   1432: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1433: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1434: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1435: 	    &Apache::lonxml::startredirection();
                   1436: 	}
                   1437: 	return '';
                   1438:     }
                   1439: 
                   1440:     sub end_lang {
                   1441: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1442: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1443: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1444: 	    my $result = &Apache::lonxml::endredirection();
                   1445: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1446: 						   $safeeval);
1.431     raeburn  1447:             if ($which=~/\w/) {
                   1448:                 $available_texts{$which} = $result;
                   1449:             }
                   1450:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1451:                                                         $safeeval);
                   1452:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1453:                 if ($language=~/\w/) {
                   1454:                     $available_texts{$language} = $result;
                   1455:                 }
1.427     bisitz   1456:             }
                   1457: 
1.397     albertel 1458: 	}
                   1459: 	return '';
                   1460:     }
                   1461: }
                   1462: 
1.170     www      1463: sub start_instructorcomment {
1.201     albertel 1464:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1465: 
                   1466:     my $result;
                   1467: 
1.339     albertel 1468:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1469: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1470:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1471: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1472: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1473: 						   $parser,$style);
1.170     www      1474: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1475: 	}
                   1476: 	$result='';
                   1477:     } elsif ($target eq 'edit') {
                   1478: 	$result .=&Apache::edit::tag_start($target,$token);
                   1479: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1480:     }
                   1481:     return $result;
                   1482: }
                   1483: 
                   1484: sub end_instructorcomment {
1.159     albertel 1485:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1486:     my $result;
                   1487:     if ($target eq "edit") {
                   1488: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1489:     }
                   1490:     return $result;
1.4       tsai     1491: }
                   1492: 
                   1493: sub start_while {
1.326     albertel 1494:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1495: 
1.160     albertel 1496:     my $result;
1.339     albertel 1497:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1498: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1499: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1500: 
1.160     albertel 1501: 	push( @Apache::structuretags::whileconds, $code);
                   1502: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1503: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1504: 	}
                   1505: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1506: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1507: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1508: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1509: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1510: 	if ( $result ) {
                   1511: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1512: 	}
                   1513:     } elsif ($target eq 'edit') {
                   1514: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1515: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1516: 					  $token,40);
                   1517: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1518:     } elsif ($target eq 'modified') {
                   1519: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1520: 						     $safeeval,'condition');
                   1521: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1522:     }
1.160     albertel 1523:     return $result;
1.4       tsai     1524: }
                   1525: 
                   1526: sub end_while {
1.159     albertel 1527:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1528:     my $result;
                   1529: 
1.339     albertel 1530:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1531: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1532: 	my $code = pop(@Apache::structuretags::whileconds);
                   1533: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1534: 	my $line = pop(@Apache::structuretags::whileline);
                   1535: 	my $return = &Apache::run::run($code,$safeeval);
                   1536: 	my $starttime=time;
                   1537: 	my $error=0;
                   1538: 	while ($return) {
                   1539: 	    if (time-$starttime >
                   1540: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1541: 		$return = 0; $error=1; next;
1.161     albertel 1542: 	    }
                   1543: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1544: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1545: 		$target eq 'analyze') {
                   1546: 		# grade/answer/analyze should produce no output but if we
                   1547: 		# are redirecting, the redirecter should know what to do
                   1548: 		# with the output
                   1549: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1550: 	    }
1.161     albertel 1551: 	    $return = &Apache::run::run($code,$safeeval);
                   1552: 	}
                   1553: 	if ($error) {
1.430     bisitz   1554: 	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occurred while running &lt;while&gt; on line').' '.$line.'</pre>');
1.160     albertel 1555: 	}
                   1556:     } elsif ($target eq "edit") {
                   1557: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1558:     }
1.160     albertel 1559:     return $result;
1.1       albertel 1560: }
1.6       tsai     1561: 
1.160     albertel 1562: # <randomlist show="1">
1.6       tsai     1563: #  <tag1>..</tag1>
                   1564: #  <tag2>..</tag2>
                   1565: #  <tag3>..</tag3>
1.160     albertel 1566: #  ...
1.6       tsai     1567: # </randomlist>
                   1568: sub start_randomlist {
1.326     albertel 1569:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1570:     my $result;
1.339     albertel 1571:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1572: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1573: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1574: 	my $b_parser= HTML::LCParser->new(\$body);
                   1575: 	$b_parser->xml_mode(1);
                   1576: 	$b_parser->marked_sections(1);
1.159     albertel 1577: 	my $b_tok;
                   1578: 	my @randomlist;
                   1579: 	my $list_item;
                   1580: 	while($b_tok = $b_parser->get_token() ) {
                   1581: 	    if($b_tok->[0] eq 'S') { # start tag
                   1582: 		# get content of the tag until matching end tag
                   1583: 		# get all text upto the matching tag
                   1584: 		# and push the content into @randomlist
                   1585: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1586: 							   $b_parser);
                   1587: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1588: 		push(@randomlist,$list_item);
                   1589: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1590:                 #         $list_item</b>";
                   1591: 	    }
                   1592: 	    if($b_tok->[0] eq 'T') { # text
                   1593: 		# what to do with text in between tags?
                   1594: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1595: 	    }
                   1596: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1597: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1598: 	    # }
                   1599: 	}
1.303     albertel 1600: 	if (@randomlist) {
                   1601: 	    my @idx_arr = (0 .. $#randomlist);
                   1602: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1603: 	    my $bodytext = '';
                   1604: 	    my $show=$#randomlist;
                   1605: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1606: 	    $showarg--;
                   1607: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  1608:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   1609:                 my @currlist;
                   1610:                 my $part = $Apache::inputtags::part;
                   1611:                 if ($part ne '') {
                   1612:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   1613:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   1614:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   1615:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1616:                         }
                   1617:                     } else {
                   1618:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1619:                     }
                   1620:                 }
                   1621:             }
1.303     albertel 1622: 	    for(0 .. $show) {
                   1623: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1624: 	    }
                   1625: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1626: 	}
                   1627:     } elsif ($target eq 'edit' ) {
                   1628: 	$result .=&Apache::edit::tag_start($target,$token);
                   1629: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1630: 					   $token,5);
                   1631: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1632:     } elsif ($target eq 'modified' ) {
                   1633: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1634: 						     $safeeval,'show');
                   1635: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1636:     }
                   1637:     return $result;
1.7       tsai     1638: }
                   1639: 
                   1640: sub shuffle {
                   1641:     my $a=shift;
                   1642:     my $i;
1.303     albertel 1643:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1644: 	&Apache::response::pushrandomnumber();
1.159     albertel 1645: 	for($i=@$a;--$i;) {
                   1646: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1647: 	    next if $i == $j;
                   1648: 	    @$a[$i,$j] = @$a[$j,$i];
                   1649: 	}
1.251     albertel 1650: 	&Apache::response::poprandomnumber();
1.7       tsai     1651:     }
1.6       tsai     1652: }
                   1653: 
                   1654: sub end_randomlist {
1.159     albertel 1655:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1656:     my $result;
                   1657:     if ($target eq 'edit' ) {
                   1658: 	$result=&Apache::edit::tag_end($target,$token,
                   1659: 				       'End Randomly Parsed Block');
                   1660:     }
                   1661:     return $result;
1.6       tsai     1662: }
                   1663: 
1.283     albertel 1664: sub ordered_show_check {
                   1665:     my $last_part=$Apache::inputtags::partlist[-2];
                   1666:     my $in_order=
                   1667: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1668:     my $in_order_show=1;
                   1669:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1670: 	$in_order_show=&Apache::response::check_status($last_part);
                   1671:     }
                   1672:     return $in_order_show;
                   1673: }
                   1674: 
1.11      albertel 1675: sub start_part {
1.326     albertel 1676:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1677:     if (!$Apache::lonxml::metamode) {
                   1678: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1679: 	                                     # duedates.
                   1680:     }
1.159     albertel 1681:     my $result='';
1.386     albertel 1682:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1683:     $Apache::inputtags::part=$id;
1.177     albertel 1684:     push(@Apache::inputtags::partlist,$id);
                   1685:     @Apache::inputtags::response=();
1.159     albertel 1686:     @Apache::inputtags::previous=();
                   1687:     @Apache::inputtags::previous_version=();
1.405     albertel 1688:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1689:     &Apache::response::reset_params();
                   1690: 
1.159     albertel 1691:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1692:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1693:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1694:     my $in_order_show=&ordered_show_check();
1.214     albertel 1695:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1696:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1697:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1698: 
                   1699:     if ($target eq 'meta') {
1.224     www      1700: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1701: 	return &Apache::response::mandatory_part_meta.
                   1702: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1703:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1704: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1705: 	if ($hidden || !$in_order_show) {
1.326     albertel 1706: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1707: 	} else {
                   1708: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1709: 	    push (@Apache::inputtags::status,$status);
                   1710: 	    my $expression='$external::datestatus="'.$status.'";';
                   1711: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1712: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1713: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1714: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1715: 	    }
1.216     albertel 1716: 	    if (( $status eq 'CLOSED' ) ||
                   1717: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1718: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1719: 		( $status eq 'BANNED') ||
                   1720: 		( $status eq 'UNAVAILABLE') ||
                   1721: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1722: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1723: 							   $style);
1.159     albertel 1724: 		if ( $target eq "web" ) {
1.211     albertel 1725: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1726: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1727: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1728: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1729: 		    } else {
1.211     albertel 1730: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1731: 		    }
1.159     albertel 1732: 		}
                   1733: 	    } else {
                   1734: 		if ($target eq 'tex') {
1.284     albertel 1735: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1736: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1737: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1738: 			} else {
                   1739: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1740: 			}
1.195     sakharuk 1741: 		    }
1.159     albertel 1742: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1743: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1744: 		    my @allkeys = split /,/,$allkeys;
                   1745: 		    my $allow_print_points = 0;
                   1746: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1747: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1748: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1749: 			}
                   1750: 		    }
1.275     albertel 1751: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1752: 		    if (defined($maxtries) && $maxtries < 0) {
                   1753: 			$allow_print_points=0;
                   1754: 		    }
1.302     albertel 1755: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1756: 				    '.disableexampointprint'}) eq 'yes') {
                   1757: 			$allow_print_points=0;
                   1758: 		    }
1.222     sakharuk 1759: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1760: 		} elsif ($target eq 'web') {
1.356     www      1761: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1762: 		}
                   1763: 	    }
                   1764: 	}
                   1765:     } elsif ($target eq 'edit') {
                   1766: 	$result.=&Apache::edit::tag_start($target,$token);
                   1767: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1768: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1769: 	    '&nbsp;&nbsp;'.
                   1770: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1771: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1772:     } elsif ($target eq 'modified') {
                   1773: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1774: 						     $safeeval,'id','display');
1.159     albertel 1775: 	if ($constructtag) {
1.225     albertel 1776: 	    #limiting ids to only letters numbers, and space
1.224     www      1777: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1778: 	    $result = &Apache::edit::rebuild_tag($token);
                   1779: 	}
                   1780:     }
                   1781:     return $result;
1.11      albertel 1782: }
                   1783: 
                   1784: sub end_part {
1.159     albertel 1785:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1786:     &Apache::lonxml::debug("in end_part $target ");
                   1787:     my $status=$Apache::inputtags::status['-1'];
                   1788:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1789:     my $in_order_show=&ordered_show_check();
1.321     albertel 1790:     my $result;
                   1791:     if (!$Apache::lonxml::metamode) {
                   1792: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1793: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1794:     }
1.312     albertel 1795:     if ($target eq 'grade') {
1.249     albertel 1796: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1797: 	    !$hidden && $in_order_show) {
1.311     foxr     1798: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1799: 	} else {
                   1800: 	    # move any submission data to .hidden
                   1801: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1802: 	}
1.283     albertel 1803:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1804: 	     !$hidden && $in_order_show) {
1.159     albertel 1805: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1806: 							$target);
1.212     albertel 1807: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1808: 	    $gradestatus='';
                   1809: 	}
1.311     foxr     1810: 	$result.=$gradestatus;
1.265     sakharuk 1811: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1812:     } elsif ($target eq 'edit') {
1.311     foxr     1813: 	$result.=&Apache::edit::end_table();
1.322     albertel 1814:     } elsif ($target eq 'modified') {
                   1815: 	 $result .= $token->[2];
1.159     albertel 1816:     }
                   1817:     pop @Apache::inputtags::status;
                   1818:     $Apache::inputtags::part='';
1.295     albertel 1819:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1820:     return $result;
1.11      albertel 1821: }
1.1       albertel 1822: 
1.25      albertel 1823: sub start_preduedate {
1.326     albertel 1824:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1825:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1826: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1827: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1828: 	if (!$Apache::lonhomework::scantronmode &&
                   1829: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1830: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1831: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1832: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1833: 	}
1.24      albertel 1834:     }
1.159     albertel 1835:     return '';
1.24      albertel 1836: }
                   1837: 
1.25      albertel 1838: sub end_preduedate {
1.159     albertel 1839:     return '';
1.24      albertel 1840: }
                   1841: 
1.369     foxr     1842: # In all the modes where <postanswerdate> text is 
                   1843: # displayable,  all we do is eat up the text between the start/stop
                   1844: # tags if the conditions are not right to display it.
1.25      albertel 1845: sub start_postanswerdate {
1.326     albertel 1846:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1847:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1848: 	&Apache::lonnet::allowed('pav',
                   1849: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1850:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1851: 	$target eq 'tex' ) {
1.300     albertel 1852: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1853: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1854: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1855: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1856: 	}
                   1857:     }
                   1858:     return '';
1.24      albertel 1859: }
                   1860: 
1.25      albertel 1861: sub end_postanswerdate {
1.159     albertel 1862:     return '';
1.24      albertel 1863: }
                   1864: 
1.25      albertel 1865: sub start_notsolved {
1.326     albertel 1866:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1867:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1868: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1869: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1870: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1871: 	if ($gradestatus =~ /^correct/ &&
                   1872: 	    &Apache::response::show_answer()) {
1.159     albertel 1873: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1874: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1875: 	}
1.24      albertel 1876:     }
1.159     albertel 1877:     return '';
1.24      albertel 1878: }
                   1879: 
1.25      albertel 1880: sub end_notsolved {
1.159     albertel 1881:     return '';
1.24      albertel 1882: }
                   1883: 
                   1884: sub start_solved {
1.326     albertel 1885:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1886:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1887: 	$target eq 'tex') {
                   1888: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1889: 	if ($gradestatus !~ /^correct/ ||
                   1890: 	    !&Apache::response::show_answer()) {
1.326     albertel 1891: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1892: 	}
1.24      albertel 1893:     }
1.159     albertel 1894:     return '';
1.24      albertel 1895: }
                   1896: 
                   1897: sub end_solved {
1.248     albertel 1898:     return '';
                   1899: }
                   1900: 
                   1901: sub start_problemtype {
1.326     albertel 1902:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1903:     my $result;
1.339     albertel 1904:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1905: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1906: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1907: 	if (!defined($mode)) { $mode='show'; }
                   1908: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1909: 	my $found=0;
                   1910: 	foreach my $type (split(',',$for)) {
                   1911: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1912: 	}
                   1913: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1914: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1915: 	}
                   1916: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1917: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1918: 	}
                   1919:     } elsif ($target eq 'edit') {
                   1920: 	$result .=&Apache::edit::tag_start($target,$token);
                   1921: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1922: 					   [['show','Show'],
                   1923: 					    ['hide','Hide']]
                   1924: 					   ,$token);
                   1925: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1926: 					     [ ['exam','Exam/Quiz Problem'],
                   1927: 					       ['survey','Survey'],
1.428     raeburn  1928: 					       ['problem','Homework Problem'],
                   1929:                                                ['practice','Practice Problem'] ]
1.248     albertel 1930: 					     ,$token);
                   1931: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1932:     } elsif ($target eq 'modified') {
                   1933: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1934: 						     $safeeval,'mode','for');
                   1935: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1936:     }
                   1937:     return $result;
                   1938: }
                   1939: 
                   1940: sub end_problemtype {
1.159     albertel 1941:     return '';
1.24      albertel 1942: }
1.34      albertel 1943: 
                   1944: sub start_startouttext {
1.159     albertel 1945:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1946:     my @result=(''.'');
                   1947:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 1948:     
                   1949:     my $nesting = 
                   1950: 	&Apache::lonxml::set_state('outtext',
                   1951: 				   &Apache::lonxml::get_state('outtext')+1);
                   1952:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   1953: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   1954:     }
1.159     albertel 1955:     return (@result);
1.34      albertel 1956: }
1.159     albertel 1957: 
1.34      albertel 1958: sub end_startouttext {
1.326     albertel 1959:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1960:     my $result='';
                   1961:     my $text='';
                   1962:     if ($target eq 'edit') {
1.424     foxr     1963: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 1964: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437     raeburn  1965: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
1.438     bisitz   1966:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  1967:                  .&Apache::edit::deletelist($target,$token)
                   1968:                  .'</span></td>';
1.425     raeburn  1969:         unless ($env{'environment.wysiwygeditor'} eq 'on') {
1.434     foxr     1970: 	    $result .= '<td align="left">'
                   1971: 		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   1972: 		.'</td>'
                   1973: 		.'<td>'
                   1974: 		.&Apache::edit::insertlist($target,$token)
                   1975: 		.'</td>';
                   1976: 	}
1.425     raeburn  1977: 	$result.='<td align="right" valign="top">' .
1.434     foxr     1978: 	    &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1979: 		 &Apache::edit::end_row().
1.362     albertel 1980:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1981: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1982:     }
                   1983:     if ($target eq 'modified') {
1.219     albertel 1984: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1985:     }
                   1986:     if ($target eq 'tex') {
                   1987: 	$result .= '\noindent ';
                   1988:     }
                   1989:     return $result;
1.34      albertel 1990: }
1.159     albertel 1991: 
1.34      albertel 1992: sub start_endouttext {
1.159     albertel 1993:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1994:     my $result='';
                   1995:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1996:     if ($target eq "modified") {
                   1997: 	$result='<endouttext />'.
1.377     albertel 1998: 	    &Apache::edit::handle_insertafter('startouttext');
                   1999:     }
1.404     albertel 2000: 
                   2001:     my $nesting = 
                   2002: 	&Apache::lonxml::set_state('outtext',
                   2003: 				   &Apache::lonxml::get_state('outtext')-1);
                   2004:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2005: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2006: 	&Apache::lonxml::set_state('outtext', 0);
                   2007:     }
1.159     albertel 2008:     return $result;
1.34      albertel 2009: }
1.159     albertel 2010: 
1.34      albertel 2011: sub end_endouttext {
1.159     albertel 2012:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2013:     my @result=('','');
                   2014:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2015:     return (@result);
1.34      albertel 2016: }
1.159     albertel 2017: 
1.45      albertel 2018: sub delete_startouttext {
1.326     albertel 2019:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2020:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2021:     my $text=$$parser['-1']->get_text("/endouttext");
                   2022:     my $ntoken=$$parser['-1']->get_token();
                   2023:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2024:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2025:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2026:     # they did the last time round
                   2027:     &Apache::lonxml::increasedepth($ntoken);
                   2028:     &Apache::lonxml::decreasedepth($ntoken);
                   2029:     return 1;
1.193     www      2030: }
                   2031: 
                   2032: sub start_simpleeditbutton {
                   2033:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2034:     my $result='';
1.284     albertel 2035:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2036: 	($target eq 'web') &&
1.330     albertel 2037:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2038:         my $url=$env{'request.noversionuri'};
1.193     www      2039:         $url=~s/\?.*$//;
1.367     albertel 2040: 	my ($symb) = &Apache::lonnet::whichuser();
1.442     bisitz   2041: #       Warning make more sense and is more important on edit screen
                   2042: #       $result='<p class="LC_warning">'
                   2043: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
                   2044: #              .&Apache::loncommon::help_open_topic('Caching')
                   2045: #              .'</p>';
                   2046:         $result.=&Apache::lontemplate::start_functionslist()
                   2047:                 .&Apache::lontemplate::item_functionslist(
                   2048:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'.&mt('Edit').'</a>')
                   2049:                 .&Apache::lontemplate::end_functionslist();
                   2050: 
1.193     www      2051:     }
                   2052:     return $result;
                   2053: }
                   2054: 
                   2055: sub end_simpleeditbutton {
                   2056:     return '';
1.45      albertel 2057: }
1.34      albertel 2058: 
1.428     raeburn  2059: sub practice_problem_header {
                   2060:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2061:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2062:            '</span>';
                   2063: }
                   2064: 
1.1       albertel 2065: 1;
                   2066: __END__
1.435     jms      2067: 
                   2068: =pod
                   2069: 
                   2070: =back
                   2071: 
                   2072: =cut

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