Annotation of loncom/homework/structuretags.pm, revision 1.465.2.2

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.465.2.2! raeburn     4: # $Id: structuretags.pm,v 1.465.2.1 2010/05/18 21:03:15 raeburn Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.254     www        28: ###
1.54      www        29: 
1.435     jms        30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
                     34: Apache::structuretags
                     35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: 
                     39: This is part of the LearningOnline Network with CAPA project
                     40: described at http://www.lon-capa.org.
                     41: 
                     42: 
                     43: =head1 NOTABLE SUBROUTINES
                     44: 
                     45: =over
                     46: 
                     47: =item 
                     48: 
                     49: =back
                     50: 
                     51: =cut
                     52: 
1.133     sakharuk   53: 
1.1       albertel   54: package Apache::structuretags; 
                     55: 
                     56: use strict;
                     57: use Apache::lonnet;
1.101     sakharuk   58: use Apache::File();
1.147     www        59: use Apache::lonmenu;
1.210     albertel   60: use Apache::lonlocal;
1.231     sakharuk   61: use Apache::lonxml;
1.434     foxr       62: use Apache::londefdef;
1.338     albertel   63: use Apache::lonenc();
1.267     albertel   64: use Time::HiRes qw( gettimeofday tv_interval );
1.356     www        65: use lib '/home/httpd/lib/perl/';
                     66: use LONCAPA;
                     67:  
1.78      harris41   68: BEGIN {
1.465.2.2! raeburn    69:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startpartmarker','startouttext','endpartmarker','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: 	    }
1.450     bisitz    215:         # Breadcrumbs for Construction Space
                    216:         &Apache::lonhtmlcommon::clear_breadcrumbs();
                    217:         &Apache::lonhtmlcommon::add_breadcrumb({
                    218:             'text'  => 'Construction Space',
                    219:             'href'  => &Apache::loncommon::authorspace(),
                    220:         });
1.460     droeschl  221:         # breadcrumbs (and tools) will be created 
                    222:         # in start_page->bodytag->innerregister
                    223: 
1.450     bisitz    224: # FIXME Where are we?
                    225: #        &Apache::lonhtmlcommon::add_breadcrumb({
                    226: #            'text'  => 'Problem Editing', # 'Problem Testing'
                    227: #            'href'  => '',
                    228: #        });
1.460     droeschl  229:         $pageheader =&Apache::loncommon::head_subbox(
1.446     bisitz    230:                 &Apache::loncommon::CSTR_pageheader());
1.297     albertel  231: 	}
1.272     albertel  232:     } elsif (!defined($found{'body'})) {
1.343     albertel  233: 	my %add_entries;
1.159     albertel  234: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    235: 						  $safeeval);
1.343     albertel  236: 	if ($background ne '' ) {
                    237: 	    $add_entries{'background'} = $background;
                    238: 	}
1.344     albertel  239: 
1.290     albertel  240: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    241: 					       $safeeval);
1.446     bisitz    242:         if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
1.344     albertel  243: 
1.446     bisitz    244:         $body_args{'bgcolor'}        = $bgcolor;
                    245:         # $body_args{'no_title'}       = 1;
                    246:         $body_args{'force_register'} = 1;
                    247:         $body_args{'add_entries'}    = \%add_entries;
                    248:         if ($env{'environment.remote'} eq 'off'
                    249:             && $env{'request.state'} eq   'construct') {
                    250:             $body_args{'only_body'}  = 1;
                    251:         }
1.344     albertel  252:     }
1.365     albertel  253:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  254:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    255: 						    \%body_args);
1.446     bisitz    256:     $page_start .= $pageheader;
1.462     raeburn   257:     if (!defined($found{'body'}) 
                    258: 	&& $env{'request.state'} ne 'construct'
                    259: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    260: 
                    261: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
                    262:         if ($symb eq '' && !$publicuser) {
                    263:             $page_start .= '<p class="LC_info">'
                    264:                           .&mt('Browsing resource, all submissions are temporary.')
                    265:                           .'</p>';
1.457     bisitz    266:         }
1.344     albertel  267:     }
                    268: 
1.409     albertel  269:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  270: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  271:     }
1.344     albertel  272:     
1.159     albertel  273:     my $form_tag_start;
                    274:     if (!defined($found{'form'})) {
1.337     albertel  275: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.465     raeburn   276: 	my $uri = &Apache::loncommon::inhibit_menu_check(
1.455     droeschl  277:                 &Apache::lonenc::check_encrypt($env{'request.uri'}));
1.464     raeburn   278:         $uri = &HTML::Entities::encode($uri,'<>&"');
1.327     albertel  279: 	$form_tag_start.=$uri.'" ';
                    280: 	if ($target eq 'edit') {
                    281: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    282: 	}
1.368     albertel  283: 	$form_tag_start.='>'."\n";
1.355     albertel  284: 
                    285: 	my $symb=&Apache::lonnet::symbread();
                    286: 	if ($symb =~ /\S/) {
                    287: 	    $symb=
                    288: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    289: 	    $form_tag_start.=
1.368     albertel  290: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  291: 	}
1.159     albertel  292:     }
1.343     albertel  293:     return ($page_start,$form_tag_start);
1.105     albertel  294: }
                    295: 
1.141     matthew   296: #use Time::HiRes();
1.105     albertel  297: sub get_resource_name {
1.159     albertel  298:     my ($parstack,$safeeval)=@_;
1.388     foxr      299:     my $name;
1.204     albertel  300:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      301: 	$name = $Apache::lonhomework::name;
                    302:     } else {
                    303: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  304: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      305: 	if ($name eq '') {
                    306: 	    $name=&Apache::lonnet::EXT('resource.title');
                    307: 	    if ($name eq 'con_lost') { $name = ''; }
                    308: 	}
                    309: 	if ($name!~/\S+/) {
                    310: 	    $name=$env{'request.uri'};
                    311: 	    $name=~s-.*/([^/]+)$-$1-;
                    312: 	}
                    313: 	# The name has had html tags escaped:
                    314:        
                    315: 	$name=~s/&lt;/</gs;
                    316: 	$name=~s/&gt;/>/gs;
                    317: 
                    318: 	$Apache::lonhomework::name=$name;
1.204     albertel  319:     }
1.159     albertel  320:     return $name;
1.105     albertel  321: }
                    322: 
                    323: sub setup_rndseed {
1.159     albertel  324:     my ($safeeval)=@_;
                    325:     my $rndseed;
1.367     albertel  326:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  327:     if ($env{'request.state'} eq "construct" 
                    328: 	|| $symb eq '' 
                    329: 	|| $Apache::lonhomework::type eq 'practice'
                    330: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       331: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  332: 						['rndseed']);
1.284     albertel  333: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  334: 	if (!$rndseed) {
1.162     albertel  335: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    336: 	    if (!$rndseed) {
                    337: 		$rndseed=time;
                    338: 	    }
1.284     albertel  339: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  340: 	}
1.374     albertel  341: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    342: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  343: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  344: 	    srand(time);
                    345: 	    $rndseed=int(rand(2100000000));
1.284     albertel  346: 	    $env{'form.rndseed'}=$rndseed;
                    347: 	    delete($env{'form.resetdata'});
                    348: 	    delete($env{'form.newrandomization'});
1.159     albertel  349: 	}
1.187     albertel  350: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  351: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  352:         }
1.247     albertel  353:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    354: 	   $rndseed=&Apache::lonnet::rndseed();
                    355: 	}
1.221     albertel  356: 	if ($safeeval) {
                    357: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  358: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  359: 	}
1.159     albertel  360:     }
                    361:     return $rndseed;
1.105     albertel  362: }
                    363: 
1.268     albertel  364: sub remember_problem_state {
                    365:     return '
1.284     albertel  366:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    367:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    368:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  369: }
                    370: 
1.423     www       371: sub problem_edit_buttons {
                    372:    return  '
1.408     albertel  373: <div class="LC_edit_problem_discards">
1.416     raeburn   374:        <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
1.423     www       375:        ' onclick="javscript:setmode(this.form,'."'discard'".')"  />
1.416     raeburn   376:        <input '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'editxml'".')').' type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" />
1.407     albertel  377:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.408     albertel  378: </div>
                    379: <div class="LC_edit_problem_saves">
1.416     raeburn   380:        <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save and Edit').'" />
                    381:        <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
1.423     www       382: </div>';
                    383: }
                    384: 
                    385: sub problem_edit_header {
                    386:     return '<input type="hidden" name="submitted" value="edit" /><input type="hidden" name="problemmode" value="edit" />'.
                    387: 	&Apache::structuretags::remember_problem_state().'
                    388: <div class="LC_edit_problem_header">
                    389: <div class="LC_edit_problem_header_title">
                    390: '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    391: </div>'.
                    392: &problem_edit_buttons().'
1.459     bisitz    393: <hr style="clear:both;" />
1.409     albertel  394: '.&Apache::lonxml::message_location().'
1.408     albertel  395: </div>
                    396: '.
1.458     bisitz    397:        '<table border="0" width="100%"><tr><td bgcolor="#F8F8F8">';
1.105     albertel  398: }
                    399: 
                    400: sub problem_edit_footer {
1.412     albertel  401:     return '</td></tr></table><br />
                    402: <div class="LC_edit_problem_footer">
1.453     bisitz    403:   <hr />'.
1.423     www       404: &problem_edit_buttons().'
1.459     bisitz    405:   <hr style="clear:both;" />
1.412     albertel  406: </div>
                    407: '.
                    408: 
1.348     albertel  409:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  410:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  411: }
                    412: 
1.235     albertel  413: sub option {
                    414:     my ($value,$name) = @_;
                    415:     my $result ="<option value='".$value."' ";
1.284     albertel  416:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  417: 	$result.=" selected='on' ";
                    418:     }
                    419:     $result.='>';
                    420:     return $result;
                    421: }
                    422: 
1.105     albertel  423: sub problem_web_to_edit_header {
1.159     albertel  424:     my ($rndseed)=@_;
1.406     albertel  425:     my $result .= '<div class="LC_edit_problem_header">';
                    426: 
                    427:     if (!$Apache::lonhomework::parsing_a_task) {
                    428: 	$result .= 
                    429: 	    '<div class="LC_edit_problem_header_title">'.
                    430: 	    &mt('Problem Testing').
                    431: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    432: 	    '</div>';
                    433:     } else {
                    434: 	$result .= 
                    435: 	    '<div class="LC_edit_problem_header_title">'.
                    436: 	    &mt('Task Testing').
                    437: 	    '</div>';
                    438:     }
                    439:     
1.315     albertel  440:     my $show_all_foils_text = 
                    441: 	($Apache::lonhomework::parsing_a_task) ?
1.452     bisitz    442: 	&mt('Show All Instances')
                    443: 	: &mt('Show All Foils');
1.315     albertel  444: 
1.452     bisitz    445:     my $show_all= '<span class="LC_nobreak"><label for="showallfoils">'
                    446:                  .'<input type="checkbox" name="showallfoils"';
1.440     bisitz    447:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.452     bisitz    448:     $show_all.= ' /> '.$show_all_foils_text
                    449:                .'</label></span>';
1.406     albertel  450: 
                    451: 
1.384     albertel  452: 
1.406     albertel  453:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  454:     if (!$Apache::lonhomework::parsing_a_task) {
                    455: 	$result.="
1.406     albertel  456: <div class='LC_edit_problem_header_row1'>
                    457: <span class=\"LC_nobreak\">
1.405     albertel  458: ".&mt("Problem Status:")."
1.235     albertel  459: <select name='problemstate'>
1.270     albertel  460:   <option value=''></option>
1.235     albertel  461:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    462:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    463:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    464:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    465:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    466: </select>
1.406     albertel  467: </span>
                    468: <span class=\"LC_nobreak\">
1.405     albertel  469: ".&mt("Problem Type:")."
1.235     albertel  470: <select name='problemtype'>
1.270     albertel  471:   <option value=''></option>
1.242     albertel  472:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   473:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  474:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.465     raeburn   475:   ".&option('surveycred' ,'problemtype').&mt("Survey Question (with credit)")."</option>
                    476:   ".&option('anonsurvey' ,'problemtype').&mt("Anonymous Survey Question")."</option>
                    477:   ".&option('anonsurveycred' ,'problemtype').&mt("Anonymous Survey Question (with credit)")."</option>
1.428     raeburn   478:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.235     albertel  479: </select>
1.406     albertel  480: </span>
                    481: $show_all
                    482: </div>
                    483: <div class='LC_edit_problem_header_row2'>
                    484: <span class=\"LC_nobreak\">
1.405     albertel  485: ".&mt("Feedback Mode:")."
1.235     albertel  486: <select name='problemstatus'>
                    487:   <option value=''></option>
1.242     albertel  488:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  489:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    490:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  491: </select>
1.406     albertel  492: </span>
                    493: ";
                    494: 
1.376     albertel  495:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    496: 	$result.="
1.406     albertel  497: <div class='LC_edit_problem_header_row1'>
                    498: <span class=\"LC_nobreak\">
1.405     albertel  499: ".&mt("Problem Status:")."
1.376     albertel  500: <select name='problemstate'>
                    501:   <option value=''></option>
                    502:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    503:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    504:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    505:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    506: </select>
1.406     albertel  507: </span>
                    508: $show_all
                    509: ";
                    510:     }
                    511:     $result.='
                    512:        <span class="LC_nobreak">
                    513:        '.&mt('Apply style file: ').'
                    514:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    515:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    516:        </span>
1.422     www       517:      </div>
                    518:      <div class="LC_edit_problem_header_row1">'.
                    519:        &Apache::lonxml::renderingoptions().'
1.406     albertel  520:      </div>
                    521:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    522:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    523:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    524:    </div>
1.453     bisitz    525:    <hr />
1.406     albertel  526:    <div class="LC_edit_problem_header_randomize_row">
                    527:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    528:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
                    529:      <input type="text" name="rndseed" size="10" value="'.
                    530: 	       $rndseed.'"
                    531:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    532: 
                    533:     if (!$Apache::lonhomework::parsing_a_task) {
                    534: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    535: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  536: 	$result .= '<span class="LC_nobreak">'.
                    537: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   538: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    539:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    540:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  541: 		$numtoanalyze.'" size="5" />').
                    542: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    543: 		'</span>';
                    544: 						    
1.313     albertel  545:     }
1.406     albertel  546: 
                    547:     $result.='
                    548:    </div>
1.453     bisitz    549:    <hr />
1.447     bisitz    550:    <div>';
1.416     raeburn   551:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    552:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    553:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    554:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    555:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  556:     $result.='
                    557:    </div>
1.453     bisitz    558:    <hr />
1.409     albertel  559:    '.&Apache::lonxml::message_location().'
1.406     albertel  560: </div>';
1.159     albertel  561:     return $result;
1.48      albertel  562: }
                    563: 
1.65      albertel  564: sub initialize_storage {
1.357     albertel  565:     my ($given_symb) = @_;
1.353     albertel  566:     undef(%Apache::lonhomework::results);
                    567:     undef(%Apache::lonhomework::history);
1.357     albertel  568:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  569: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  570:     
                    571:     # anonymous users (CODEd exams) have no data
                    572:     if ($name eq 'anonymous' 
                    573: 	&& !defined($domain)) {
                    574: 	return;
                    575:     }
                    576: 
1.333     albertel  577:     if ($env{'request.state'} eq 'construct' 
                    578: 	|| $symb eq ''
                    579: 	|| $Apache::lonhomework::type eq 'practice') {
                    580: 	
                    581: 	my $namespace = $symb || $env{'request.uri'};
                    582: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  583: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    584: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  585: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    586: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    587: 	    &Apache::lonxml::debug("Attempt reset");
                    588: 	}
1.159     albertel  589: 	%Apache::lonhomework::history=
1.333     albertel  590: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  591: 	my ($temp)=keys %Apache::lonhomework::history ;
                    592: 	&Apache::lonxml::debug("Return message of $temp");
                    593:     } else {
                    594: 	%Apache::lonhomework::history=
                    595: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    596:     }
1.353     albertel  597: 
1.159     albertel  598:     #ignore error conditions
1.67      albertel  599:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  600:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  601: }
                    602: 
1.435     jms       603: =pod
                    604: 
                    605: =item finalize_storage()
                    606: 
                    607: 	Stores away the result has to a student's environment
                    608: 	checks form.grade_ for specific values, other wises stores
                    609: 	to the running users environment
                    610: 	Will increment totals for attempts, students, and corrects
                    611: 	if running user has student role.
                    612: 	
                    613: =cut
                    614: 
                    615: 
1.65      albertel  616: sub finalize_storage {
1.357     albertel  617:     my ($given_symb) = @_;
1.159     albertel  618:     my $result;
1.289     albertel  619:     if (%Apache::lonhomework::results) {
1.323     albertel  620: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    621: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  622: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  623: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  624: 	if ($env{'request.state'} eq 'construct' 
                    625: 	    || $symb eq ''
                    626: 	    || $Apache::lonhomework::type eq 'practice') {
                    627: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  628: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  629: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  630: 					      $namespace,'',$domain,$name);
1.159     albertel  631: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    632: 	} else {
                    633: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    634: 					    $symb,$courseid,$domain,$name);
                    635: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   636:             if ($env{'request.role'} =~/^st/) {
                    637:                 &store_aggregates($symb,$courseid);
                    638:             }
1.159     albertel  639: 	}
1.323     albertel  640:     } else {
                    641: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  642:     }
1.159     albertel  643:     return $result;
1.65      albertel  644: }
                    645: 
1.435     jms       646: =pod
                    647: 
                    648: item store_aggregates()
                    649: 
                    650: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                    651: 	for the course. Increments total number of attempts, unique students 
                    652: 	and corrects for each part for an instance of a problem, as appropriate.
                    653: 	
                    654: =cut
                    655: 
1.285     raeburn   656: sub store_aggregates {
                    657:     my ($symb,$courseid) = @_;
1.286     albertel  658:     my %aggregate;
                    659:     my @parts;
1.288     albertel  660:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    661:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  662:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  663:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  664:             push(@parts, $1);
1.285     raeburn   665:         }
                    666:     }
1.286     albertel  667:     foreach my $part (@parts) {
                    668:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    669: 	    eq 'APPROX_ANS' ||
                    670: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    671: 	    eq 'EXACT_ANS') {
1.287     albertel  672:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   673:         }
1.286     albertel  674:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  675:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   676:         } else {
1.293     albertel  677:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   678:             if ($last_reset) {
1.293     albertel  679:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   680:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    681:                 }
                    682:             }
1.285     raeburn   683:         }
1.287     albertel  684:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   685:     }
1.292     raeburn   686:     if (keys (%aggregate) > 0) {
1.289     albertel  687: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   688:                             $cdomain,$cname);
                    689:     }
                    690: }
1.289     albertel  691: 
1.65      albertel  692: sub checkout_msg {
1.211     albertel  693:     my %lt=&Apache::lonlocal::texthash( 
                    694: 		'resource'=>'The resource needs to be checked out',
                    695: 		'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.',
                    696:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    697:                 'checkout'=>'Check out Exam for Viewing',
                    698: 		'checkout?'=>'Check out Exam?');
1.352     albertel  699:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  700:     return (<<ENDCHECKOUT);
1.211     albertel  701: <h2>$lt{'resource'}</h2>
                    702:     <p>$lt{'id_expln'}</p>
1.449     bisitz    703: <p class="LC_warning">$lt{'warning'}</p>
1.444     bisitz    704: <form name="checkout" method="post" action="$uri">
1.91      albertel  705: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  706: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  707: </form>
                    708: ENDCHECKOUT
                    709: }
                    710: 
1.252     albertel  711: sub firstaccess_msg {
1.253     albertel  712:     my ($time,$symb)=@_;
1.414     albertel  713:     my $result;
                    714:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    715:     if ($interval[1] eq 'map') {
                    716: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                    717: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                    718:     
                    719: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.418     bisitz    720: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    721:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    722:                              ,$foldertitle,$time)."</h2>";
1.414     albertel  723:     } elsif ($interval[1] eq 'course') {
                    724: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.418     bisitz    725:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    726:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    727:                              ,$course,$time)."</h2>";
1.414     albertel  728:     } else {
                    729: 	my $title=&Apache::lonnet::gettitle($symb);
1.418     bisitz    730:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
                    731:                              .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                    732:                              ,$title,$time)."</h2>";
1.414     albertel  733:     }
1.352     albertel  734:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz    735:     my $buttontext = &mt('Show Resource');
                    736:     my $timertext = &mt('Start Timer?');
1.414     albertel  737:     $result .= (<<ENDCHECKOUT);
1.444     bisitz    738: <form name="markaccess" method="post" action="$uri">
1.252     albertel  739: <input type="hidden" name="markaccess" value="yes" />
1.418     bisitz    740: <input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel  741: </form>
                    742: ENDCHECKOUT
1.414     albertel  743:     return $result;
1.252     albertel  744: }
                    745: 
1.204     albertel  746: sub init_problem_globals {
                    747:     my ($type)=@_;
                    748:     #initialize globals
1.308     foxr      749:     #   For problems, we start out in part 0 (outside a <part> tag).
                    750:     #   and part 0 is used to describe the main body of the <problem>
                    751:     #
1.204     albertel  752:     if ($type eq 'problem') {
                    753: 	$Apache::inputtags::part='0';
                    754: 	@Apache::inputtags::partlist=('0');
1.405     albertel  755: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel  756: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      757: 
1.266     albertel  758:     } elsif ($type eq 'library') {
1.204     albertel  759: 	$Apache::inputtags::part='';
                    760: 	@Apache::inputtags::partlist=();
1.405     albertel  761: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel  762: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      763: 
1.304     albertel  764:     } elsif ($type eq 'Task') {
                    765: 	$Apache::inputtags::part='0';
                    766: 	@Apache::inputtags::partlist=('0');
1.405     albertel  767: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel  768: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  769:     }
                    770:     @Apache::inputtags::responselist = ();
                    771:     @Apache::inputtags::importlist = ();
                    772:     @Apache::inputtags::previous=();
                    773:     @Apache::inputtags::previous_version=();
                    774:     $Apache::structuretags::printanswer='No';
                    775:     @Apache::structuretags::whileconds=();
                    776:     @Apache::structuretags::whilebody=();
                    777:     @Apache::structuretags::whileline=();
                    778:     $Apache::lonhomework::scantronmode=0;
                    779:     undef($Apache::lonhomework::name);
1.358     albertel  780:     undef($Apache::lonhomework::default_type);
                    781:     undef($Apache::lonhomework::type);
1.204     albertel  782: }
                    783: 
                    784: sub reset_problem_globals {
                    785:     my ($type)=@_;
                    786:     undef(%Apache::lonhomework::history);
                    787:     undef(%Apache::lonhomework::results);
                    788:     undef($Apache::inputtags::part);
1.208     albertel  789: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    790: #detect if we try to do 2 problems in one file
                    791: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  792:     undef($Apache::lonhomework::name);
1.358     albertel  793:     undef($Apache::lonhomework::default_type);
                    794:     undef($Apache::lonhomework::type);
                    795:     undef($Apache::lonhomework::scantronmode);
                    796:     undef($Apache::lonhomework::ignore_response_errors);
1.405     albertel  797:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel  798: }
                    799: 
1.241     albertel  800: sub set_problem_state {
1.240     albertel  801:     my ($part)=@_;
1.284     albertel  802:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  803: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    804: 	    'correct_by_student';
                    805:     }
                    806: }
                    807: 
1.241     albertel  808: sub get_problem_status {
                    809:     my ($part)=@_;
1.267     albertel  810:     my $problem_status;
1.284     albertel  811:     if ($env{'request.state'} eq 'construct' &&
                    812: 	defined($env{'form.problemstatus'})) {
                    813: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  814:     } else {
                    815: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    816: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  817: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  818:     }
                    819:     return $problem_status;
                    820: }
                    821: 
1.9       albertel  822: sub start_problem {
1.326     albertel  823:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  824: 
1.311     foxr      825:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  826:     if (!$Apache::lonxml::metamode) {
                    827: 	&Apache::lonxml::startredirection();
                    828:     }
1.311     foxr      829: 
1.308     foxr      830:     # Problems don't nest and we don't allow more than one <problem> in
                    831:     # a .problem file.
                    832:     #
1.184     albertel  833:     if ( $Apache::inputtags::part ne '' ||
                    834: 	 $Apache::lonhomework::parsing_a_problem) {
                    835: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  836: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  837: 	return '';
                    838:     }
1.184     albertel  839: 
                    840:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  841:     &init_problem_globals('problem');
1.166     albertel  842: 
1.284     albertel  843:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  844: 	$Apache::lonhomework::scantronmode=1;
                    845:     }
1.161     albertel  846: 
1.159     albertel  847:     if ($target ne 'analyze') {
1.415     raeburn   848:         my $type = &Apache::lonnet::EXT('resource.0.type');
                    849: 	$Apache::lonhomework::type=$type;
1.284     albertel  850: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel  851: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel  852: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  853: 	}
1.332     albertel  854: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  855:     }
1.164     albertel  856:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  857: 	my $uri=$env{'request.uri'};
1.159     albertel  858: 	if ($uri=~/\.(\w+)$/) {
                    859: 	    $Apache::lonhomework::type=$1;
                    860: 	    &Apache::lonxml::debug("Using type of $1");
                    861: 	} else {
                    862: 	    $Apache::lonhomework::type='problem';
                    863: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    864: 	}
1.87      albertel  865:     }
1.301     albertel  866:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       867: 
1.363     albertel  868:     &initialize_storage();
1.389     albertel  869:     if ($target ne 'analyze'
                    870:        	&& $env{'request.state'} eq 'construct') {
                    871: 	&set_problem_state('0');
                    872:     }
                    873: 
1.366     albertel  874:     if ($target eq 'web') {
                    875: 	&Apache::lonxml::debug(" grading history ");
                    876: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    877:     }
1.363     albertel  878: 
1.159     albertel  879:     #added vars to the scripting enviroment
1.213     albertel  880:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  881:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  882:     &Apache::run::run($expression,$safeeval);
1.159     albertel  883:     my $status;
                    884:     my $accessmsg;
                    885: 
1.343     albertel  886:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  887:     my ($result,$form_tag_start);
1.354     albertel  888:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    889: 	|| $target eq 'edit') {
1.350     albertel  890: 	($result,$form_tag_start) =
                    891: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    892: 			$name);
                    893:     }
                    894: 
1.284     albertel  895:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  896: 
                    897:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    898:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    899: 	$target eq 'tex') {
                    900: 	#handle exam checkout
                    901: 	if ($Apache::lonhomework::type eq 'exam') {
                    902: 	    my $token=
                    903: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  904: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  905: 		$token=&Apache::lonxml::maketoken();
                    906: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    907: 		    $token;
                    908: 	    }
1.343     albertel  909: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  910: 	}
1.284     albertel  911: 	if ($env{'form.markaccess'}) {
1.414     albertel  912: 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    913: 	    &Apache::lonnet::set_first_access($interval[1]);
1.252     albertel  914: 	}
1.159     albertel  915: 	#handle rand seed in construction space
                    916: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  917: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  918: 	if ($env{'request.state'} ne "construct" && 
                    919: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  920: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
1.462     raeburn   921: 		$rndseed.'" />'.
                    922: 		    '<input type="submit" name="resetdata"
                    923:                              value="'.&mt('New Problem Variation').'" />';
1.334     albertel  924: 	    if (exists($env{'form.username'})) {
                    925: 		$form_tag_start.=
1.164     albertel  926: 		    '<input type="hidden" name="username"
1.284     albertel  927:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  928: 	    }
1.462     raeburn   929: 	    if ($env{'request.role.adv'}) {
                    930: 		$form_tag_start.= ' <label class="LC_nobreak">'
                    931:                          .'<input type="checkbox" name="showallfoils"';
                    932: 		if (defined($env{'form.showallfoils'})) {
                    933: 		    $form_tag_start.=' checked="checked"';
                    934: 		}
                    935:                 $form_tag_start.= ' /> '
                    936:                                  .&mt('Show All Foils')
                    937:                                  .'</label>';
                    938: 	    }
1.417     www       939:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn   940:                 $form_tag_start.=&practice_problem_header();
1.417     www       941:             }
1.462     raeburn   942: 	    $form_tag_start.='<hr />';
1.162     albertel  943: 	}
1.324     albertel  944: 
                    945: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    946: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  947: 	push (@Apache::inputtags::status,$status);
1.324     albertel  948: 
1.159     albertel  949: 	my $expression='$external::datestatus="'.$status.'";';
                    950: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    951: 	&Apache::run::run($expression,$safeeval);
                    952: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  953: 
1.159     albertel  954: 	if (( $status eq 'CLOSED' ) ||
                    955: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  956: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  957: 	    ( $status eq 'BANNED') ||
1.216     albertel  958: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  959: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  960: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  961: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    962: 						       $style);
1.159     albertel  963: 	    if ( $target eq "web" ) {
1.343     albertel  964: 		my $msg;
1.159     albertel  965: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  966: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.441     raeburn   967:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                    968:                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
1.253     albertel  969: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  970: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  971: 		}
1.216     albertel  972: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       973: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  974: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  975: 		    $msg.=&checkout_msg();
1.252     albertel  976: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  977: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  978: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn   979: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.159     albertel  980: 		}
                    981: 		$result.=$msg.'<br />';
                    982: 	    } elsif ($target eq 'tex') {
1.332     albertel  983: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    984: 		                    : '\begin{minipage}{\textwidth}';
1.443     foxr      985: 		$result.='\noindent \vskip 1 mm '.
1.332     albertel  986: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  987: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  988: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  989: 		} else {
1.211     albertel  990: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  991: 		}
                    992: 	    }
1.324     albertel  993: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  994: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    995: 						       $style);
1.324     albertel  996: 	    if ($target eq 'web') {
1.375     albertel  997: 		$result .= 
                    998: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  999: 	    } elsif ($target eq 'grade') {
                   1000: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                   1001: 							'problem');
                   1002: 	    }
1.159     albertel 1003: 	} elsif ($target eq 'web') {
1.360     albertel 1004: 	    if ($status eq 'CAN_ANSWER' 
                   1005: 		&& $slot_name ne ''
                   1006: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                   1007: 		# unproctored slot access, self checkin
                   1008: 		&Apache::bridgetask::check_in('problem',undef,undef,
                   1009: 					      $slot_name);
                   1010: 	    }
1.368     albertel 1011: 	    $result.="\n $form_tag_start \t".	
1.227     albertel 1012: 	      '<input type="hidden" name="submitted" value="yes" />';
                   1013: 	    # create a page header and exit
1.284     albertel 1014: 	    if ($env{'request.state'} eq "construct") {
                   1015: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn  1016:                 if ($Apache::lonhomework::type eq 'practice') {
                   1017:                     $result.= '<input type="submit" name="resetdata" '.
                   1018:                               'value="'.&mt('New Problem Variation').'" />'.
                   1019:                               &practice_problem_header().'<hr />';
                   1020:                 }
1.227     albertel 1021: 	    }
                   1022: 	    # if we are viewing someone else preserve that info
1.284     albertel 1023: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel 1024: 		foreach my $field ('symb','courseid','domain','username') {
                   1025: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1026: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1027: 		}
                   1028: 	    }
                   1029: 	} elsif ($target eq 'tex') {
1.319     foxr     1030: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                   1031: 
1.99      sakharuk 1032: 	}
1.159     albertel 1033:     } elsif ($target eq 'edit') {
1.343     albertel 1034: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1035: 	$Apache::lonxml::warnings_error_header=
                   1036: 	    &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 1037: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1038: 	$result.=$temp;
                   1039:     } elsif ($target eq 'modified') {
                   1040: 	$result=$token->[4];
                   1041:     } else {
                   1042: 	# page_start returned a starting result, delete it if we don't need it
                   1043: 	$result = '';
1.99      sakharuk 1044:     }
1.159     albertel 1045:     return $result;
1.9       albertel 1046: }
                   1047: 
                   1048: sub end_problem {
1.159     albertel 1049:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1050:     my $result;
1.310     foxr     1051: 
1.321     albertel 1052:     if (!$Apache::lonxml::metamode) {
                   1053: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1054: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1055:     }
1.319     foxr     1056: 
                   1057:     if ($target eq 'tex') {
1.321     albertel 1058: 	# Figure out the front matter and replace the
                   1059: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1060: 	# this in end_problem because whether or not we display due
                   1061: 	# dates depends on whether due dates have already been
                   1062: 	# displayed in the problem parts.
                   1063: 
1.319     foxr     1064: 	my $frontmatter   = '';
                   1065: 	my $startminipage = '';
                   1066: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1067: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1068: 	}
                   1069: 	my $id = $Apache::inputtags::part;
                   1070: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1071: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1072: 	my @packages = split /,/,$packages;
                   1073: 	my $allow_print_points = 0;
                   1074: 	foreach my $partial_key (@packages) {
                   1075: 	    if ($partial_key=~m/^part_0$/) {
                   1076: 		$allow_print_points=1;
                   1077: 	    }
                   1078: 	}
                   1079: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1080: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1081: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1082: 			'.disableexampointprint'}) eq 'yes') {
                   1083: 	    $allow_print_points=0;
                   1084: 	}
                   1085: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.443     foxr     1086: 	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     1087: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1088: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1089: 	
                   1090: 	#  Figure out what the due date is and if we need to print
                   1091: 	#  it in the problem header.  We have been logging the
                   1092: 	#  last due date written to file. 
                   1093: 	
                   1094: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                   1095: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
1.448     bisitz   1096:         my $duedate_text = &mt('Due date: [_1]'
                   1097:                               ,&Apache::lonlocal::locallocaltime($duetime));
1.319     foxr     1098: 	my $temp_file;
                   1099: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1100: 	
                   1101: 	# Figure out what the last printed due date is or set it
                   1102: 	# to the epoch if no duedates have been printed.
                   1103: 	
                   1104: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1105: 	if (-e $filename) {
                   1106: 	    $temp_file = Apache::File->new($filename);
                   1107: 	    my @due_file      = <$temp_file>;
                   1108: 	    $due_file_content = $due_file[$#due_file];
                   1109: 	    chomp $due_file_content;
                   1110: 	} 
                   1111: 	
                   1112: 	# We display the due date iff it is not the same as the last
                   1113: 	# duedate in problem header ($due_file_content), and
                   1114: 	# none of our parts displayed a duedate.
                   1115: 	#
                   1116: 	my $parts_with_displayduedate;
                   1117: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1118: 	    $parts_with_displayduedate = 
                   1119: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1120: 	} else {
                   1121: 	    $parts_with_displayduedate = 0;
                   1122: 	}
                   1123: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1124: 	    $temp_file = Apache::File->new('>'.$filename);
                   1125: 	    print $temp_file "$duetime\n";
                   1126: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1127: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1128: 		    $frontmatter .= $begin_doc.
1.448     bisitz   1129: 			'\textit{'.$duedate_text.'} '.$toc_line;
1.319     foxr     1130: 		} else {
                   1131: 		    $frontmatter.= $begin_doc.$toc_line;
1.463     foxr     1132: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { 
                   1133: 			$frontmatter .= '\fbox{\textit{'.$weight.' pt}}';
                   1134: 		    }
1.319     foxr     1135: 		}
                   1136: 	    } else {
1.448     bisitz   1137: 		$frontmatter .= '\vskip 1mm\textit{'.$duedate_text.'} \\\\\\\\'.$startminipage;
1.319     foxr     1138: 	    }
                   1139: 	} else {
                   1140: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1141: 		$frontmatter .= $begin_doc.$toc_line;
1.463     foxr     1142: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { 
                   1143: 		    $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';
                   1144: 		}
1.319     foxr     1145: 	    } else {
1.381     albertel 1146: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1147: 	    }
                   1148: 	}
                   1149: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1150:     }
                   1151: 
1.159     albertel 1152:     my $status=$Apache::inputtags::status['-1'];
                   1153:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1154: 	$target eq 'tex') {
1.249     albertel 1155: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1156: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1157: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1158: 		&Apache::inputtags::grade;
1.324     albertel 1159: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1160: 		# no need to grade, and don't want to hide data
1.249     albertel 1161: 	    } else {
                   1162: 		# move any submission data to .hidden
                   1163: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1164: 	    }
1.159     albertel 1165: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1166: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1167: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1168: 	    # if part is zero, no <part>s existed, so we need show the current
                   1169: 	    # grading status
                   1170: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1171: 	    $result.= $gradestatus;
                   1172: 	}
                   1173: 	if (
1.284     albertel 1174: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1175: 	    ($target eq 'answer') || ($target eq 'tex')
                   1176: 	   ) {
1.227     albertel 1177: 	    if ($target ne 'tex' &&
1.284     albertel 1178: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1179: 		$result.="</form>";
1.348     albertel 1180: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel 1181: 	    }
                   1182: 	    if ($target eq 'web') {
1.346     albertel 1183: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1184: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1185: 		my $endminipage = '';
1.284     albertel 1186: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1187: 		    $endminipage = '\end{minipage}';
                   1188: 		}
1.284     albertel 1189:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1190: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1191: 		} else {
1.262     sakharuk 1192: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1193: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1194: 			$result .= $endminipage.'\end{document} ';
                   1195: 		    } else {
1.382     albertel 1196: 			$result .= $endminipage;
1.262     sakharuk 1197: 		    }
1.159     albertel 1198: 		}
                   1199: 	    }
                   1200: 	}
                   1201: 	if ($target eq 'grade') {
                   1202: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1203: 	    &finalize_storage();
                   1204: 	}
1.284     albertel 1205: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1206: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1207: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1208: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1209: 	                        # we always show answer mode too.
1.159     albertel 1210: 	}
                   1211:     } elsif ($target eq 'meta') {
                   1212: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1213: 	    @Apache::inputtags::response=();
1.159     albertel 1214: 	    $result=&Apache::response::mandatory_part_meta;
                   1215: 	}
1.215     albertel 1216: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1217: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1218:     } elsif ($target eq 'edit') {
                   1219: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1220: 	$result .= &problem_edit_footer();
1.320     albertel 1221:     } elsif ($target eq 'modified') {
                   1222: 	 $result .= $token->[2];
1.159     albertel 1223:     }
1.155     albertel 1224: 
1.284     albertel 1225:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1226: 	&Apache::inputtags::check_for_duplicate_ids();
                   1227:     }
1.204     albertel 1228: 
                   1229:     &reset_problem_globals('problem');
1.159     albertel 1230: 
                   1231:     return $result;
1.48      albertel 1232: }
                   1233: 
1.108     albertel 1234: 
1.48      albertel 1235: sub start_library {
1.159     albertel 1236:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1237:     my ($result,$form_tag_start);
1.371     albertel 1238:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1239: 	&init_problem_globals('library');
                   1240: 	$Apache::lonhomework::type='problem';
                   1241:     }
1.159     albertel 1242:     if ($target eq 'edit') {
1.343     albertel 1243: 	($result,$form_tag_start)=
                   1244: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1245: 			'Edit');
                   1246: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1247: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1248: 	$result.=$temp;
                   1249:     } elsif ($target eq 'modified') {
                   1250: 	$result=$token->[4];
1.340     albertel 1251:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1252: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1253: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1254: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1255: 	($result,$form_tag_start)=
                   1256: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1257: 			$name);
1.159     albertel 1258: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1259: 	$result.=" \n $form_tag_start".	
1.159     albertel 1260: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1261: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1262:         if ($Apache::lonhomework::type eq 'practice') {
                   1263:             $result.= '<input type="submit" name="resetdata" '.
                   1264:                       'value="'.&mt('New Problem Variation').'" />'.
                   1265:                       &practice_problem_header().'<hr />';
                   1266:         }
1.159     albertel 1267:     }
                   1268:     return $result;
1.48      albertel 1269: }
                   1270: 
                   1271: sub end_library {
1.159     albertel 1272:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1273:     my $result='';
                   1274:     if ($target eq 'edit') {
                   1275: 	$result=&problem_edit_footer();
1.371     albertel 1276:     } elsif ($target eq 'web' 
                   1277: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1278: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1279: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1280:     }
1.371     albertel 1281:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1282: 	&reset_problem_globals('library');
                   1283:     }
1.159     albertel 1284:     return $result;
1.197     www      1285: }
                   1286: 
                   1287: sub start_definetag {
1.326     albertel 1288:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1289: 
                   1290:     my $result;
                   1291: 
                   1292:     my $name = $token->[2]->{'name'};
1.326     albertel 1293:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1294:     if ($target eq 'web') {
                   1295: 	if ($name=~/^\//) {
                   1296: 	    $result=
                   1297: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1298: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1299: 	} else {
                   1300: 	    $result=
                   1301: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1302: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1303: 	}
                   1304: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1305: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1306:     }
                   1307:     return $result;
                   1308: }
                   1309: 
                   1310: sub end_definetag {
                   1311:     return '';
1.1       albertel 1312: }
                   1313: 
                   1314: sub start_block {
1.201     albertel 1315:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1316: 
                   1317:     my $result;
1.1       albertel 1318: 
1.339     albertel 1319:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1320: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1321: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1322: 	if (defined($code) && $code ne '') {
1.137     albertel 1323: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1324: 		&Apache::lonxml::default_homework_load($safeeval);
                   1325: 	    }
1.131     albertel 1326: 	    $result = &Apache::run::run($code,$safeeval);
                   1327: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1328: 	} else {
                   1329: 	    $result='1';
                   1330: 	}
                   1331: 	if ( ! $result ) {
1.201     albertel 1332: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1333: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1334: 	}
                   1335: 	$result='';
                   1336:     } elsif ($target eq 'edit') {
                   1337: 	$result .=&Apache::edit::tag_start($target,$token);
                   1338: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1339: 					  $token,40);
                   1340: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1341:     } elsif ($target eq 'modified') {
                   1342: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1343: 						     $safeeval,'condition');
                   1344: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1345:     }
1.131     albertel 1346:     return $result;
1.1       albertel 1347: }
                   1348: 
                   1349: sub end_block {
1.167     www      1350:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1351:     my $result;
                   1352:     if ($target eq "edit") {
                   1353: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1354:     }
                   1355:     return $result;
                   1356: }
                   1357: 
                   1358: sub start_languageblock {
1.201     albertel 1359:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1360: 
                   1361:     my $result;
                   1362: 
1.339     albertel 1363:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1364: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1365: 	my $include = $token->[2]->{'include'};
                   1366: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1367:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.394     www      1368: # This should not even happen, since we should at least have the server language
1.398     www      1369:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1370: # Now loop over all languages in order of preference
                   1371:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1372: # If the languageblock has no arguments, show the contents
1.399     www      1373:            $result=1;
                   1374:            my $found=0;
1.394     www      1375: # Do we have an include argument?
1.398     www      1376: 	   if ($include) {
1.394     www      1377: # If include is specified, by default, don't render the block
1.399     www      1378:               $result=0;
1.398     www      1379:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1380: # ... but if my preferred language is included, render it
1.398     www      1381:                  if ($included_language eq $preferred_language) {
1.399     www      1382:                     $result=1; 
                   1383:                     $found=1; 
1.398     www      1384:                  }
                   1385:               }
                   1386: 	   }
1.394     www      1387: # Do we have an exclude argument?
1.398     www      1388:            if ($exclude) {
1.399     www      1389:               $result=1;
1.398     www      1390:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1391:                  if ($excluded_language eq $preferred_language) {
1.399     www      1392:                     $result=0;
                   1393:                     $found=1;
1.398     www      1394:                  }
                   1395:               }
                   1396: 	   }
1.399     www      1397:            if ($found) { last; }
1.398     www      1398:         }
1.201     albertel 1399: 	if ( ! $result ) {
                   1400: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1401: 						   $style);
                   1402: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1403: 	}
                   1404: 	$result='';
1.167     www      1405:     } elsif ($target eq 'edit') {
                   1406: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1407: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1408: 					  $token,40);
1.211     albertel 1409: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1410: 					  $token,40);
                   1411: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1412:     } elsif ($target eq 'modified') {
                   1413: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1414: 						     $safeeval,'include',
                   1415: 						     'exclude');
1.167     www      1416: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1417:     }
                   1418:     return $result;
                   1419: }
                   1420: 
                   1421: sub end_languageblock {
1.170     www      1422:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1423:     my $result;
1.201     albertel 1424:     if ($target eq "edit") {
1.170     www      1425: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1426:     }
                   1427:     return $result;
                   1428: }
                   1429: 
1.397     albertel 1430: {
                   1431:     my %available_texts;
                   1432:     sub start_translated {
                   1433: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1434: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1435: 	undef(%available_texts);
                   1436:     }
                   1437:     
                   1438:     sub end_translated {
                   1439: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1440: 	my $result;
                   1441: 	#show the translation on viewable targets
                   1442: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1443: 	    # or non-viewable targets, if it's embedded in something that
                   1444: 	    # wants the output
                   1445: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1446: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1447: 	    my @possibilities = keys(%available_texts);
                   1448: 	    my $which = 
                   1449: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1450: 	    $result = $available_texts{$which};
                   1451: 	}
                   1452: 	undef(%available_texts);
                   1453: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1454: 	return $result;
                   1455:     }
                   1456: 
                   1457: 
                   1458:     sub start_lang {
                   1459: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1460: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1461: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1462: 	    &Apache::lonxml::startredirection();
                   1463: 	}
                   1464: 	return '';
                   1465:     }
                   1466: 
                   1467:     sub end_lang {
                   1468: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1469: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1470: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1471: 	    my $result = &Apache::lonxml::endredirection();
                   1472: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1473: 						   $safeeval);
1.431     raeburn  1474:             if ($which=~/\w/) {
                   1475:                 $available_texts{$which} = $result;
                   1476:             }
                   1477:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1478:                                                         $safeeval);
                   1479:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1480:                 if ($language=~/\w/) {
                   1481:                     $available_texts{$language} = $result;
                   1482:                 }
1.427     bisitz   1483:             }
                   1484: 
1.397     albertel 1485: 	}
                   1486: 	return '';
                   1487:     }
                   1488: }
                   1489: 
1.170     www      1490: sub start_instructorcomment {
1.201     albertel 1491:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1492: 
                   1493:     my $result;
                   1494: 
1.339     albertel 1495:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1496: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.465.2.1  raeburn  1497:         $result=($env{'request.role'}=~/^(in|cc|co|au|ca|li)/);
1.284     albertel 1498: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1499: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1500: 						   $parser,$style);
1.170     www      1501: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1502: 	}
                   1503: 	$result='';
                   1504:     } elsif ($target eq 'edit') {
                   1505: 	$result .=&Apache::edit::tag_start($target,$token);
                   1506: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1507:     }
                   1508:     return $result;
                   1509: }
                   1510: 
                   1511: sub end_instructorcomment {
1.159     albertel 1512:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1513:     my $result;
                   1514:     if ($target eq "edit") {
                   1515: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1516:     }
                   1517:     return $result;
1.4       tsai     1518: }
                   1519: 
                   1520: sub start_while {
1.326     albertel 1521:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1522: 
1.160     albertel 1523:     my $result;
1.339     albertel 1524:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1525: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1526: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1527: 
1.160     albertel 1528: 	push( @Apache::structuretags::whileconds, $code);
                   1529: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1530: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1531: 	}
                   1532: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1533: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1534: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1535: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1536: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1537: 	if ( $result ) {
                   1538: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1539: 	}
                   1540:     } elsif ($target eq 'edit') {
                   1541: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1542: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1543: 					  $token,40);
                   1544: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1545:     } elsif ($target eq 'modified') {
                   1546: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1547: 						     $safeeval,'condition');
                   1548: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1549:     }
1.160     albertel 1550:     return $result;
1.4       tsai     1551: }
                   1552: 
                   1553: sub end_while {
1.159     albertel 1554:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1555:     my $result;
                   1556: 
1.339     albertel 1557:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1558: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1559: 	my $code = pop(@Apache::structuretags::whileconds);
                   1560: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1561: 	my $line = pop(@Apache::structuretags::whileline);
                   1562: 	my $return = &Apache::run::run($code,$safeeval);
                   1563: 	my $starttime=time;
                   1564: 	my $error=0;
                   1565: 	while ($return) {
                   1566: 	    if (time-$starttime >
                   1567: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1568: 		$return = 0; $error=1; next;
1.161     albertel 1569: 	    }
                   1570: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1571: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1572: 		$target eq 'analyze') {
                   1573: 		# grade/answer/analyze should produce no output but if we
                   1574: 		# are redirecting, the redirecter should know what to do
                   1575: 		# with the output
                   1576: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1577: 	    }
1.161     albertel 1578: 	    $return = &Apache::run::run($code,$safeeval);
                   1579: 	}
                   1580: 	if ($error) {
1.430     bisitz   1581: 	    &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 1582: 	}
                   1583:     } elsif ($target eq "edit") {
                   1584: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1585:     }
1.160     albertel 1586:     return $result;
1.1       albertel 1587: }
1.6       tsai     1588: 
1.160     albertel 1589: # <randomlist show="1">
1.6       tsai     1590: #  <tag1>..</tag1>
                   1591: #  <tag2>..</tag2>
                   1592: #  <tag3>..</tag3>
1.160     albertel 1593: #  ...
1.6       tsai     1594: # </randomlist>
                   1595: sub start_randomlist {
1.326     albertel 1596:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1597:     my $result;
1.339     albertel 1598:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1599: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1600: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1601: 	my $b_parser= HTML::LCParser->new(\$body);
                   1602: 	$b_parser->xml_mode(1);
                   1603: 	$b_parser->marked_sections(1);
1.159     albertel 1604: 	my $b_tok;
                   1605: 	my @randomlist;
                   1606: 	my $list_item;
                   1607: 	while($b_tok = $b_parser->get_token() ) {
                   1608: 	    if($b_tok->[0] eq 'S') { # start tag
                   1609: 		# get content of the tag until matching end tag
                   1610: 		# get all text upto the matching tag
                   1611: 		# and push the content into @randomlist
                   1612: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1613: 							   $b_parser);
                   1614: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1615: 		push(@randomlist,$list_item);
                   1616: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1617:                 #         $list_item</b>";
                   1618: 	    }
                   1619: 	    if($b_tok->[0] eq 'T') { # text
                   1620: 		# what to do with text in between tags?
                   1621: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1622: 	    }
                   1623: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1624: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1625: 	    # }
                   1626: 	}
1.303     albertel 1627: 	if (@randomlist) {
                   1628: 	    my @idx_arr = (0 .. $#randomlist);
                   1629: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1630: 	    my $bodytext = '';
                   1631: 	    my $show=$#randomlist;
                   1632: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1633: 	    $showarg--;
                   1634: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  1635:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   1636:                 my @currlist;
                   1637:                 my $part = $Apache::inputtags::part;
                   1638:                 if ($part ne '') {
                   1639:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   1640:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   1641:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   1642:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1643:                         }
                   1644:                     } else {
                   1645:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1646:                     }
                   1647:                 }
                   1648:             }
1.303     albertel 1649: 	    for(0 .. $show) {
                   1650: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1651: 	    }
                   1652: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1653: 	}
                   1654:     } elsif ($target eq 'edit' ) {
                   1655: 	$result .=&Apache::edit::tag_start($target,$token);
                   1656: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1657: 					   $token,5);
                   1658: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1659:     } elsif ($target eq 'modified' ) {
                   1660: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1661: 						     $safeeval,'show');
                   1662: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1663:     }
                   1664:     return $result;
1.7       tsai     1665: }
                   1666: 
                   1667: sub shuffle {
                   1668:     my $a=shift;
                   1669:     my $i;
1.303     albertel 1670:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1671: 	&Apache::response::pushrandomnumber();
1.159     albertel 1672: 	for($i=@$a;--$i;) {
                   1673: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1674: 	    next if $i == $j;
                   1675: 	    @$a[$i,$j] = @$a[$j,$i];
                   1676: 	}
1.251     albertel 1677: 	&Apache::response::poprandomnumber();
1.7       tsai     1678:     }
1.6       tsai     1679: }
                   1680: 
                   1681: sub end_randomlist {
1.159     albertel 1682:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1683:     my $result;
                   1684:     if ($target eq 'edit' ) {
                   1685: 	$result=&Apache::edit::tag_end($target,$token,
                   1686: 				       'End Randomly Parsed Block');
                   1687:     }
                   1688:     return $result;
1.6       tsai     1689: }
                   1690: 
1.283     albertel 1691: sub ordered_show_check {
                   1692:     my $last_part=$Apache::inputtags::partlist[-2];
                   1693:     my $in_order=
                   1694: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1695:     my $in_order_show=1;
                   1696:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1697: 	$in_order_show=&Apache::response::check_status($last_part);
                   1698:     }
                   1699:     return $in_order_show;
                   1700: }
                   1701: 
1.465.2.2! raeburn  1702: sub start_startpartmarker {
        !          1703:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
        !          1704:     my $result='';
        !          1705:     if ($target eq 'edit') {
        !          1706:         $result=&Apache::edit::tag_start($target,$token);
        !          1707:         $result.=&mt('Marker for the start of a part. Place end marker below to wrap in-between tags into a new part.').'</td></tr>';
        !          1708:         $result.=&Apache::edit::end_table();
        !          1709: 
        !          1710:     }
        !          1711:     return $result;
        !          1712: }
        !          1713: 
        !          1714: sub end_startpartmarker {
        !          1715:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
        !          1716:     my @result;
        !          1717:     if ($target eq 'edit') { $result[1]='no'; }
        !          1718:     return @result;
        !          1719: }
        !          1720: 
        !          1721: sub start_endpartmarker {
        !          1722:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
        !          1723:     my $result='';
        !          1724:     if ($target eq 'edit') {
        !          1725:         $result=&Apache::edit::tag_start($target,$token);
        !          1726:         $result.=&mt('Marker for the end of a part. Place start marker above to wrap in-between tags into a new part.').'</td></tr>';
        !          1727:         $result.=&Apache::edit::end_table();
        !          1728: 
        !          1729:     }
        !          1730:     return $result;
        !          1731: }
        !          1732: 
        !          1733: sub end_endpartmarker {
        !          1734:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
        !          1735:     my @result;
        !          1736:     if ($target eq 'edit') { $result[1]='no'; }
        !          1737:     return @result;
        !          1738: }
        !          1739: 
1.11      albertel 1740: sub start_part {
1.326     albertel 1741:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1742:     if (!$Apache::lonxml::metamode) {
                   1743: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1744: 	                                     # duedates.
                   1745:     }
1.159     albertel 1746:     my $result='';
1.386     albertel 1747:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1748:     $Apache::inputtags::part=$id;
1.177     albertel 1749:     push(@Apache::inputtags::partlist,$id);
                   1750:     @Apache::inputtags::response=();
1.159     albertel 1751:     @Apache::inputtags::previous=();
                   1752:     @Apache::inputtags::previous_version=();
1.405     albertel 1753:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1754:     &Apache::response::reset_params();
                   1755: 
1.159     albertel 1756:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1757:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1758:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1759:     my $in_order_show=&ordered_show_check();
1.214     albertel 1760:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1761:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1762:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1763: 
                   1764:     if ($target eq 'meta') {
1.224     www      1765: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1766: 	return &Apache::response::mandatory_part_meta.
                   1767: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1768:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1769: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1770: 	if ($hidden || !$in_order_show) {
1.326     albertel 1771: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1772: 	} else {
                   1773: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1774: 	    push (@Apache::inputtags::status,$status);
                   1775: 	    my $expression='$external::datestatus="'.$status.'";';
                   1776: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1777: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1778: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1779: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1780: 	    }
1.216     albertel 1781: 	    if (( $status eq 'CLOSED' ) ||
                   1782: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1783: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1784: 		( $status eq 'BANNED') ||
                   1785: 		( $status eq 'UNAVAILABLE') ||
                   1786: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1787: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1788: 							   $style);
1.159     albertel 1789: 		if ( $target eq "web" ) {
1.211     albertel 1790: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1791: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1792: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1793: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1794: 		    } else {
1.211     albertel 1795: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1796: 		    }
1.159     albertel 1797: 		}
                   1798: 	    } else {
                   1799: 		if ($target eq 'tex') {
1.284     albertel 1800: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1801: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1802: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1803: 			} else {
                   1804: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1805: 			}
1.195     sakharuk 1806: 		    }
1.159     albertel 1807: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1808: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1809: 		    my @allkeys = split /,/,$allkeys;
                   1810: 		    my $allow_print_points = 0;
                   1811: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1812: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1813: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1814: 			}
                   1815: 		    }
1.275     albertel 1816: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1817: 		    if (defined($maxtries) && $maxtries < 0) {
                   1818: 			$allow_print_points=0;
                   1819: 		    }
1.302     albertel 1820: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1821: 				    '.disableexampointprint'}) eq 'yes') {
                   1822: 			$allow_print_points=0;
                   1823: 		    }
1.463     foxr     1824: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { 
                   1825: 			$result .= '\vskip 10mm\fbox{\textit{'.$weight.' pt}}';
                   1826: 
                   1827: 		    }
1.233     www      1828: 		} elsif ($target eq 'web') {
1.356     www      1829: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1830: 		}
                   1831: 	    }
                   1832: 	}
                   1833:     } elsif ($target eq 'edit') {
                   1834: 	$result.=&Apache::edit::tag_start($target,$token);
                   1835: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1836: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1837: 	    '&nbsp;&nbsp;'.
                   1838: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1839: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1840:     } elsif ($target eq 'modified') {
                   1841: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1842: 						     $safeeval,'id','display');
1.159     albertel 1843: 	if ($constructtag) {
1.225     albertel 1844: 	    #limiting ids to only letters numbers, and space
1.224     www      1845: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1846: 	    $result = &Apache::edit::rebuild_tag($token);
                   1847: 	}
                   1848:     }
                   1849:     return $result;
1.11      albertel 1850: }
                   1851: 
                   1852: sub end_part {
1.159     albertel 1853:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1854:     &Apache::lonxml::debug("in end_part $target ");
                   1855:     my $status=$Apache::inputtags::status['-1'];
                   1856:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1857:     my $in_order_show=&ordered_show_check();
1.321     albertel 1858:     my $result;
                   1859:     if (!$Apache::lonxml::metamode) {
                   1860: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1861: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1862:     }
1.312     albertel 1863:     if ($target eq 'grade') {
1.249     albertel 1864: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1865: 	    !$hidden && $in_order_show) {
1.311     foxr     1866: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1867: 	} else {
                   1868: 	    # move any submission data to .hidden
                   1869: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1870: 	}
1.283     albertel 1871:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1872: 	     !$hidden && $in_order_show) {
1.159     albertel 1873: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1874: 							$target);
1.212     albertel 1875: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1876: 	    $gradestatus='';
                   1877: 	}
1.311     foxr     1878: 	$result.=$gradestatus;
1.265     sakharuk 1879: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1880:     } elsif ($target eq 'edit') {
1.311     foxr     1881: 	$result.=&Apache::edit::end_table();
1.322     albertel 1882:     } elsif ($target eq 'modified') {
                   1883: 	 $result .= $token->[2];
1.159     albertel 1884:     }
                   1885:     pop @Apache::inputtags::status;
                   1886:     $Apache::inputtags::part='';
1.295     albertel 1887:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1888:     return $result;
1.11      albertel 1889: }
1.1       albertel 1890: 
1.25      albertel 1891: sub start_preduedate {
1.326     albertel 1892:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1893:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1894: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1895: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1896: 	if (!$Apache::lonhomework::scantronmode &&
                   1897: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1898: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1899: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1900: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1901: 	}
1.24      albertel 1902:     }
1.159     albertel 1903:     return '';
1.24      albertel 1904: }
                   1905: 
1.25      albertel 1906: sub end_preduedate {
1.159     albertel 1907:     return '';
1.24      albertel 1908: }
                   1909: 
1.369     foxr     1910: # In all the modes where <postanswerdate> text is 
                   1911: # displayable,  all we do is eat up the text between the start/stop
                   1912: # tags if the conditions are not right to display it.
1.25      albertel 1913: sub start_postanswerdate {
1.326     albertel 1914:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1915:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1916: 	&Apache::lonnet::allowed('pav',
                   1917: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1918:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1919: 	$target eq 'tex' ) {
1.300     albertel 1920: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1921: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1922: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1923: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1924: 	}
                   1925:     }
                   1926:     return '';
1.24      albertel 1927: }
                   1928: 
1.25      albertel 1929: sub end_postanswerdate {
1.159     albertel 1930:     return '';
1.24      albertel 1931: }
                   1932: 
1.25      albertel 1933: sub start_notsolved {
1.326     albertel 1934:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1935:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1936: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1937: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1938: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1939: 	if ($gradestatus =~ /^correct/ &&
                   1940: 	    &Apache::response::show_answer()) {
1.159     albertel 1941: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1942: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1943: 	}
1.24      albertel 1944:     }
1.159     albertel 1945:     return '';
1.24      albertel 1946: }
                   1947: 
1.25      albertel 1948: sub end_notsolved {
1.159     albertel 1949:     return '';
1.24      albertel 1950: }
                   1951: 
                   1952: sub start_solved {
1.326     albertel 1953:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1954:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1955: 	$target eq 'tex') {
                   1956: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1957: 	if ($gradestatus !~ /^correct/ ||
                   1958: 	    !&Apache::response::show_answer()) {
1.326     albertel 1959: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1960: 	}
1.24      albertel 1961:     }
1.159     albertel 1962:     return '';
1.24      albertel 1963: }
                   1964: 
                   1965: sub end_solved {
1.248     albertel 1966:     return '';
                   1967: }
                   1968: 
                   1969: sub start_problemtype {
1.326     albertel 1970:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1971:     my $result;
1.339     albertel 1972:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1973: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1974: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1975: 	if (!defined($mode)) { $mode='show'; }
                   1976: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1977: 	my $found=0;
                   1978: 	foreach my $type (split(',',$for)) {
                   1979: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1980: 	}
                   1981: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1982: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1983: 	}
                   1984: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1985: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1986: 	}
                   1987:     } elsif ($target eq 'edit') {
                   1988: 	$result .=&Apache::edit::tag_start($target,$token);
                   1989: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1990: 					   [['show','Show'],
                   1991: 					    ['hide','Hide']]
                   1992: 					   ,$token);
                   1993: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1994: 					     [ ['exam','Exam/Quiz Problem'],
                   1995: 					       ['survey','Survey'],
1.465     raeburn  1996:                                                ['surveycred','Survey (with credit)'],
                   1997:                                                ['anonsurvey','Anonymous Survey'],
                   1998:                                                ['anonsurveycred','Anonymous Survey (with credit)'],
1.428     raeburn  1999: 					       ['problem','Homework Problem'],
                   2000:                                                ['practice','Practice Problem'] ]
1.248     albertel 2001: 					     ,$token);
                   2002: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2003:     } elsif ($target eq 'modified') {
                   2004: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2005: 						     $safeeval,'mode','for');
                   2006: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2007:     }
                   2008:     return $result;
                   2009: }
                   2010: 
                   2011: sub end_problemtype {
1.159     albertel 2012:     return '';
1.24      albertel 2013: }
1.34      albertel 2014: 
                   2015: sub start_startouttext {
1.159     albertel 2016:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2017:     my @result=(''.'');
                   2018:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 2019:     
                   2020:     my $nesting = 
                   2021: 	&Apache::lonxml::set_state('outtext',
                   2022: 				   &Apache::lonxml::get_state('outtext')+1);
                   2023:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   2024: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   2025:     }
1.159     albertel 2026:     return (@result);
1.34      albertel 2027: }
1.159     albertel 2028: 
1.34      albertel 2029: sub end_startouttext {
1.326     albertel 2030:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2031:     my $result='';
                   2032:     my $text='';
                   2033:     if ($target eq 'edit') {
1.424     foxr     2034: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 2035: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437     raeburn  2036: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
1.438     bisitz   2037:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  2038:                  .&Apache::edit::deletelist($target,$token)
                   2039:                  .'</span></td>';
1.425     raeburn  2040:         unless ($env{'environment.wysiwygeditor'} eq 'on') {
1.434     foxr     2041: 	    $result .= '<td align="left">'
                   2042: 		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   2043: 		.'</td>'
                   2044: 		.'<td>'
                   2045: 		.&Apache::edit::insertlist($target,$token)
                   2046: 		.'</td>';
                   2047: 	}
1.425     raeburn  2048: 	$result.='<td align="right" valign="top">' .
1.434     foxr     2049: 	    &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 2050: 		 &Apache::edit::end_row().
1.362     albertel 2051:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      2052: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 2053:     }
                   2054:     if ($target eq 'modified') {
1.219     albertel 2055: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 2056:     }
                   2057:     if ($target eq 'tex') {
                   2058: 	$result .= '\noindent ';
                   2059:     }
                   2060:     return $result;
1.34      albertel 2061: }
1.159     albertel 2062: 
1.34      albertel 2063: sub start_endouttext {
1.159     albertel 2064:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2065:     my $result='';
                   2066:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   2067:     if ($target eq "modified") {
                   2068: 	$result='<endouttext />'.
1.377     albertel 2069: 	    &Apache::edit::handle_insertafter('startouttext');
                   2070:     }
1.404     albertel 2071: 
                   2072:     my $nesting = 
                   2073: 	&Apache::lonxml::set_state('outtext',
                   2074: 				   &Apache::lonxml::get_state('outtext')-1);
                   2075:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2076: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2077: 	&Apache::lonxml::set_state('outtext', 0);
                   2078:     }
1.159     albertel 2079:     return $result;
1.34      albertel 2080: }
1.159     albertel 2081: 
1.34      albertel 2082: sub end_endouttext {
1.159     albertel 2083:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2084:     my @result=('','');
                   2085:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2086:     return (@result);
1.34      albertel 2087: }
1.159     albertel 2088: 
1.45      albertel 2089: sub delete_startouttext {
1.326     albertel 2090:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2091:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2092:     my $text=$$parser['-1']->get_text("/endouttext");
                   2093:     my $ntoken=$$parser['-1']->get_token();
                   2094:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2095:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2096:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2097:     # they did the last time round
                   2098:     &Apache::lonxml::increasedepth($ntoken);
                   2099:     &Apache::lonxml::decreasedepth($ntoken);
                   2100:     return 1;
1.193     www      2101: }
                   2102: 
                   2103: sub start_simpleeditbutton {
                   2104:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2105:     my $result='';
1.284     albertel 2106:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2107: 	($target eq 'web') &&
1.330     albertel 2108:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2109:         my $url=$env{'request.noversionuri'};
1.193     www      2110:         $url=~s/\?.*$//;
1.367     albertel 2111: 	my ($symb) = &Apache::lonnet::whichuser();
1.451     bisitz   2112: #       Warning makes more sense and is more important on edit screen
1.442     bisitz   2113: #       $result='<p class="LC_warning">'
                   2114: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
                   2115: #              .&Apache::loncommon::help_open_topic('Caching')
                   2116: #              .'</p>';
1.451     bisitz   2117:         $result.=&Apache::lonhtmlcommon::start_funclist()
                   2118:                 .&Apache::lonhtmlcommon::add_item_funclist(
                   2119:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'
                   2120:                     .&mt('Edit').'</a>')
                   2121:                 .&Apache::lonhtmlcommon::end_funclist();
1.442     bisitz   2122: 
1.193     www      2123:     }
                   2124:     return $result;
                   2125: }
                   2126: 
                   2127: sub end_simpleeditbutton {
                   2128:     return '';
1.45      albertel 2129: }
1.34      albertel 2130: 
1.428     raeburn  2131: sub practice_problem_header {
                   2132:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2133:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2134:            '</span>';
                   2135: }
                   2136: 
1.1       albertel 2137: 1;
                   2138: __END__
1.435     jms      2139: 
                   2140: =pod
                   2141: 
                   2142: =back
                   2143: 
                   2144: =cut

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