Return to scripttag.pm CVS log

Up to [LON-CAPA] / loncom / xml

Toggle box tag

    1: # The LearningOnline Network with CAPA
    2: # <script> definiton
    3: #
    4: # $Id: scripttag.pm,v 1.161 2011/12/19 18:00:27 www Exp $
    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: #
   28: 
   29: package Apache::scripttag;
   30: 
   31: use strict;
   32: use Apache::lonnet;
   33: use Apache::lonlocal;
   34: use Apache::style();
   35: 
   36: #Globals
   37: # this used to pass around the standard callsub arguments to a tag func
   38: # so xmlparse can reenter the inner_xmlparse loop.
   39: 
   40: @Apache::scripttag::parser_env = ();
   41: BEGIN {
   42:   &Apache::lonxml::register('Apache::scripttag',
   43: 			    ('script','scriptlib','parserlib','import',
   44: 			     'window','togglebox','display','storetc','physnet',
   45: 			     'standalone','comment','num','parse','algebra',
   46: 			     'LONCAPA_INTERNAL_TURN_STYLE_ON',
   47: 			     'LONCAPA_INTERNAL_TURN_STYLE_OFF'));
   48: }
   49: 
   50: sub start_LONCAPA_INTERNAL_TURN_STYLE_ON {
   51:     $Apache::lonxml::usestyle=1;
   52:     $Apache::lonxml::style_values='';
   53:     return ('','no');
   54: }
   55: 
   56: sub end_LONCAPA_INTERNAL_TURN_STYLE_ON {
   57:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   58:     my $end=&Apache::lonxml::get_param('end',$parstack,$safeeval);
   59:     if (defined($end)) {
   60: 	&Apache::lonxml::end_tag($tagstack,$parstack,$token);
   61:     }
   62:     return ('','no');
   63: }
   64: 
   65: sub start_LONCAPA_INTERNAL_TURN_STYLE_OFF {
   66:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   67:     $Apache::lonxml::usestyle=0;
   68:     my $end=&Apache::lonxml::get_param('end',$parstack,$safeeval);
   69:     if (!$end) {
   70: 	$Apache::lonxml::style_values=$$parstack[-1];
   71: 	$Apache::lonxml::style_end_values=$$parstack[-1];
   72:     } else {
   73: 	$Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
   74: 	$Apache::lonxml::style_end_values='';
   75:     }
   76:     return ('','no');
   77: }
   78: 
   79: sub end_LONCAPA_INTERNAL_TURN_STYLE_OFF {
   80:     return ('','no');
   81: }
   82: 
   83: sub start_script {
   84:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   85:   @Apache::scripttag::parser_env = @_;
   86:   my $result='';
   87:   my $type= &Apache::lonxml::get_param('type',$parstack,$safeeval);
   88:   &Apache::lonxml::debug("found type of $type");
   89:   if ($type eq "loncapa/perl") {
   90:     if ( $target eq "modified" ) {
   91: 	$result=$token->[4].&Apache::edit::modifiedfield('/script',$parser);
   92:     } elsif ( $target eq 'web' || $target eq 'tex' ||
   93: 	      $target eq 'grade' || $target eq 'webgrade' ||
   94: 	      $target eq 'answer' || $target eq 'analyze' ) {
   95: 	my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
   96: 	if (!$Apache::lonxml::default_homework_loaded) {
   97: 	    &Apache::lonxml::default_homework_load($safeeval);
   98: 	}
   99: 	&Apache::run::run($bodytext,$safeeval);
  100: 	if (($target eq 'answer') &&
  101: 	    ($env{'form.answer_output_mode'} ne 'tex') &&
  102: 	    ($Apache::lonhomework::viewgrades == 'F')) {
  103: 	    $Apache::lonxml::evaluate--;
  104: 	    my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
  105: 	    $uname =~s/\W//g;
  106: 	    $udom  =~s/\W//g;
  107: 	    my $function_name = 
  108: 		join('_','LONCAPA_scriptvars',$uname,$udom,
  109: 		     $env{'form.counter'},$Apache::lonxml::curdepth);
  110:             &Apache::lonxml::add_script_result(
  111: 	             &Apache::loncommon::modal_adhoc_window($function_name,500,500,
  112:                             '<pre>'.&Apache::run::dump($target,$safeeval).'</pre>',
  113:                             &mt('Script Vars'))."<br />");
  114: 	}
  115:     } elsif ($target eq "edit" ) {
  116:       #&Apache::run::run($bodytext,$safeeval);
  117:       #$result="<br /> &lt;$token->[1]&gt; output: <br />$bodytext<br />Source:<br />";
  118: 	my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
  119: 	$result=&Apache::edit::tag_start($target,$token,'Script');
  120: 	$result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4);
  121:     } elsif ($target eq 'meta') {
  122: 	my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
  123:     }
  124:   } else {
  125:       my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
  126:       if ($target ne "meta" && $target ne 'tex' && $target ne 'answer') {
  127: 	  $result = $token->[4];
  128: 	  $result.=$bodytext;
  129:       }
  130:   }
  131:   return $result;
  132: }
  133: 
  134: sub end_script {
  135:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  136:   if ( $target eq "meta" ) { return ''; } 
  137:   my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
  138:   my $result='';
  139:   #other script blocks need to survive
  140:   if ($type ne "loncapa/perl" && $target ne 'tex') {
  141:     return $token->[2];
  142:   } elsif ($target eq 'edit' ) {
  143:     return &Apache::edit::end_table();
  144:   } elsif ($target eq 'answer') {
  145:     $Apache::lonxml::evaluate++;
  146:   }
  147:   return '';
  148: }
  149: 
  150: sub start_display {
  151:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  152:   @Apache::scripttag::parser_env = @_;
  153:   my $result;
  154: 
  155:   if ( $target eq "modified" ) {
  156:       $result=$token->[4].&Apache::edit::modifiedfield("/display",$parser);
  157:   } elsif ( $target eq 'web' || $target eq 'tex' ||
  158: 	    $target eq 'grade' || $target eq 'webgrade' ||
  159: 	    $target eq 'answer' || $target eq 'analyze') {
  160:       my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
  161:       if (!$Apache::lonxml::default_homework_loaded) {
  162: 	  &Apache::lonxml::default_homework_load($safeeval);
  163:       }
  164:       $result=&Apache::run::run($bodytext,$safeeval);
  165:       if ($target eq 'grade' || $target eq 'answer' ||
  166: 	  $target eq 'analyze') {
  167: 	  # grade/answer/analyxe should produce no output but if we
  168: 	  # are redirecting, the redirecter should know what to do
  169: 	  # with the output
  170: 	  if (!$Apache::lonxml::redirection) { $result=''; }
  171:       }
  172:       $Apache::lonxml::post_evaluate=0;
  173:   } elsif ($target eq "edit" ) {
  174:     my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
  175:     #$result = 
  176:     #  "<br /> &lt;$token->[1]&gt; output: <br />$bodytext<br />Source:<br />";
  177:     #$result.=&Apache::edit::editfield($token->[1],$bodytext,'',40,1);
  178:     $result=&Apache::edit::tag_start($target,$token,'Script With Display');
  179:     $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,1)
  180:   } elsif ($target eq 'meta') {
  181:       my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
  182:   }
  183:   return $result;
  184: }
  185: 
  186: sub end_display {
  187:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  188:   if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
  189:   return '';
  190: }
  191: 
  192: sub start_scriptlib {
  193:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  194:   my $bodytext;
  195:   my $result ='';
  196:   my $error='';
  197: 
  198:   if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
  199:       $target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
  200:       $target eq 'analyze' || $target eq 'webgrade') {
  201:     $bodytext=$$parser[$#$parser]->get_text("/scriptlib");
  202:     $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
  203: 				     $$parstack[$#$parstack]);
  204:     my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
  205: 					       $bodytext);
  206:     my $script=&Apache::lonnet::getfile($location);
  207:     if ($script == -1) {
  208:       if ($target eq 'edit') {
  209:         $error='</tr><tr><td>'.&mt('Errors').'</td><td colspan="2"><b>'.&mt(' Unable to find [_1]','<span class="LC_filename">'.$location.'</span>').'</b></td>'."\n";
  210:       } else {
  211: 	&Apache::lonxml::error("<b> Unable to find <i>$location</i> for scriptlib</b>");
  212: 	return "";
  213:       }
  214:     }
  215:     &Apache::run::run($script,$safeeval);
  216:     #&Apache::lonxml::debug("ran $bodytext:<br />".&Apache::lonnet::getfile($bodytext)."<br />");
  217:   }
  218:   if ($target eq "edit" ) {
  219:     $result=
  220:       &Apache::edit::tag_start($target,$token,'New Script Functions').
  221: 	&Apache::edit::editline($token->[1],$bodytext,'scriptlib',40).
  222:             &Apache::edit::browse(undef,'textnode').
  223: 	  $error.'</td></tr>'.
  224: 	    &Apache::edit::end_table();
  225:   }
  226:   if ($target eq "modified" ) {
  227:       $result=$token->[4].&Apache::edit::modifiedfield("/scriptlib",$parser);
  228:   }
  229:   return $result;
  230: }
  231: 
  232: sub end_scriptlib {
  233:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  234:   my @result;
  235:   if ($target eq "edit" ) { $result[1]='no'; }
  236:   return @result;
  237: }
  238: 
  239: sub start_parserlib {
  240:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  241:   my $bodytext;
  242:   my $result ="";
  243:   my $error='';
  244:   if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
  245:       $target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
  246:       $target eq 'analyze' || $target eq 'webgrade') {
  247:     $bodytext=$$parser[$#$parser]->get_text("/parserlib");
  248:     $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
  249: 				     $$parstack[$#$parstack]);
  250:     my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
  251: 					       $bodytext);
  252:     my $styletext=&Apache::lonnet::getfile($location);
  253:     #&Apache::lonxml::debug("found :$bodytext: in :$location: with :$styletext:");
  254:     if ($styletext == -1) {
  255:       if ($target eq 'edit') {
  256: 	$error='</tr><tr><td>Errors</td><td colspan="2"><b> Unable to find <i>'.$location.'</i></b></td>'."\n";
  257:       } else {
  258: 	&Apache::lonxml::error("<b> Unable to find <i>$location</i> for parserlib</b>");
  259: 	return "";
  260:       }
  261:     }
  262:     %$style = ( %$style , &Apache::style::styleparser($target,$styletext));
  263:   }
  264:   if ($target eq "edit" ) {
  265:     $result=
  266:       &Apache::edit::tag_start($target,$token,'New Tag Definitions').
  267: 	&Apache::edit::editline($token->[1],$bodytext,'',40).
  268: 	  $error.'</td></tr>'.
  269: 	    &Apache::edit::end_table();
  270:   }
  271:   if ($target eq "modified" ) {
  272:       $result=$token->[4].&Apache::edit::modifiedfield("/parserlib",$parser);
  273:   }
  274:   return $result;
  275: }
  276: 
  277: sub end_parserlib {
  278:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  279:   my @result;
  280:   if ($target eq "edit" ) { $result[1]='no'; }
  281:   return @result;
  282: }
  283: 
  284: sub start_window {
  285:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  286:     my $result = '';
  287:     if ($target eq 'web' || $target eq 'webgrade') {
  288: 	&Apache::lonxml::startredirection;
  289:     } elsif ($target eq 'tex') {
  290: 	$result = '\unskip\footnote{';
  291:     } elsif ($target eq 'edit') {
  292: 	$result.=&Apache::edit::tag_start($target,$token);
  293: 	$result.=&Apache::edit::text_arg('Text of Link:','linktext',$token,70);
  294: 	$result.=&Apache::edit::text_arg('Height:','height',$token,5);
  295: 	$result.=&Apache::edit::text_arg('Width:','width',$token,5);
  296: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
  297:     } elsif ($target eq 'modified') {
  298: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
  299: 						     $safeeval,'linktext',
  300: 						     'width','height');
  301: 	if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
  302:     }
  303:     return $result;  
  304: }
  305: 
  306: sub end_window {
  307:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  308:   my $result;
  309:   if ($target eq 'web' || $target eq 'webgrade') {
  310:     my $output=&Apache::lonxml::endredirection;
  311:     my $linktext= &Apache::lonxml::get_param('linktext',$parstack,$safeeval);
  312:     if (!$linktext) { $linktext='<sup>*</sup>'; }
  313:     my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
  314:     if (!$width) { $width='500'; }
  315:     my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
  316:     if (!$height) { $height='200'; }
  317: 
  318:     my ($start_page,$end_page);
  319:     $result=&Apache::loncommon::modal_adhoc_window
  320:            ("LONCAPA_newwindow_$Apache::lonxml::curdepth",$width,$height,$output,$linktext);
  321:   } elsif ($target eq 'tex') {
  322:       $result = '}';
  323:   } else {
  324:       $result = '';
  325:   }
  326:   return $result; 
  327: }
  328: 
  329: 
  330: sub start_togglebox {
  331:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  332:     my $result = '';
  333:     if ($target eq 'web' || $target eq 'webgrade') {
  334:         my $id="LONCAPA_togglebox_$Apache::lonxml::curdepth";
  335:         my $heading=&Apache::lonxml::get_param('heading',$parstack,$safeeval);
  336:         unless ($heading) { $heading=''; } else { $heading.=' '; }
  337:         my $showtext=&Apache::lonxml::get_param('showtext',$parstack,$safeeval);
  338:         unless ($showtext) { $showtext=&mt('show'); }
  339:         my $hidetext=&Apache::lonxml::get_param('hidetext',$parstack,$safeeval);
  340:         unless ($hidetext) { $hidetext=&mt('hide'); }
  341:         my $headerbg=&Apache::lonxml::get_param('headerbg',$parstack,$safeeval);
  342:         unless ($headerbg) { $headerbg='#FFFFFF'; }
  343:         $result=&Apache::loncommon::start_data_table().
  344:                 &Apache::loncommon::start_data_table_header_row().'<td bgcolor="'.$headerbg.'">'.$heading.
  345:                 '[<a id="'.$id.'link" href="javascript:LCtoggleDisplay(\''.$id.'\',\''.$hidetext.'\',\''.
  346:                 $showtext.'\')">'.$showtext.'</a>]</td>'.
  347:                 &Apache::loncommon::end_data_table_header_row().
  348:                 '<tr id="'.$id.'" style="display:none""><td>';
  349:     } elsif ($target eq 'tex') {
  350:         my $heading=&Apache::lonxml::get_param('heading',$parstack,$safeeval);
  351:         unless ($heading) { $heading=''; } else { $heading.=' '; }
  352:         $result = "\n\n".'\fbox{{\bf '.$heading.'} \qquad '."\n";
  353:     } elsif ($target eq 'edit') {
  354:         $result.=&Apache::edit::tag_start($target,$token);
  355:         $result.=&Apache::edit::text_arg('Heading:','heading',$token,70);
  356:         $result.=&Apache::edit::text_arg('Header Background:','headerbg',$token,7);
  357:         $result.=&Apache::edit::text_arg('Show text:','showtext',$token,10);
  358:         $result.=&Apache::edit::text_arg('Hide text:','hidetext',$token,10);
  359:         $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
  360:     } elsif ($target eq 'modified') {
  361:         my $constructtag=&Apache::edit::get_new_args($token,$parstack,
  362:                                                      $safeeval,'heading',
  363:                                                      'showtext','hidetext',
  364:                                                      'headerbg','textbg');
  365:         if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
  366:     }
  367:     return $result;
  368: }
  369: 
  370: sub end_togglebox {
  371:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  372:   my $result;
  373:   if ($target eq 'web' || $target eq 'webgrade') {
  374:     $result='</td></tr>'.&Apache::loncommon::end_data_table();
  375:   } elsif ($target eq 'tex') {
  376:       $result = "}\n\n";
  377:   } else {
  378:       $result = '';
  379:   }
  380:   return $result;
  381: }
  382: 
  383: 
  384: 
  385: sub start_import {
  386:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  387:   my $bodytext=$$parser[$#$parser]->get_text("/import");
  388:   my $result ="";
  389: 
  390:   $bodytext=&Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
  391: 
  392:   if ($target eq 'web' ||  $target eq 'webgrade' || $target eq 'grade' 
  393:       || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze' ) {
  394:     # FIXME this probably needs to be smart about construction vs.
  395:     # non construction space.
  396:     my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
  397:     my $file=&Apache::lonnet::getfile($location);
  398:     if ($file == -1) {
  399:       &Apache::lonxml::error("<b> Unable to find <i>$bodytext as $location</i> for import</b>");
  400:       return "";
  401:     }
  402:     my $importmode=&Apache::lonxml::get_param('importmode',$parstack,$safeeval);
  403:     if (($importmode eq 'problem') || ($importmode eq 'part')) {
  404: # We are using import to import published problems
  405:        if (($importmode eq 'problem') || ($file=~/<part[^<]*>/s)) {
  406: # We explicitly don't want this to be a separate part or the problem already has parts
  407:           $file=~s/^\s*<problem>/<library>/s;
  408: 	  $file=~s/<\/problem>\s*$/<\/library>/s;
  409:        } else {
  410: # We want this to be a separate part, but it currently is not
  411:           $file=~s/^\s*<problem>/<library><part>/s;
  412: 	  $file=~s/<\/problem>\s*$/<\/part><\/library>/s;
  413:        }
  414:     }
  415:     my $dir=$location;
  416:     $dir=~s:/[^/]*$::;
  417:     #  &Apache::lonxml::debug("directory $dir $location file $file \n<b>END</b>\n");
  418:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
  419:     if (!$id) { $id=$Apache::lonxml::curdepth; }
  420:     push(@Apache::inputtags::import,$id);
  421:     push(@Apache::inputtags::importlist,$id);
  422: 
  423:     &Apache::lonxml::newparser($parser,\$file,$dir);
  424: 
  425:   } elsif ($target eq "edit" ) {
  426:     $result.=&Apache::edit::tag_start($target,$token);
  427:     my $location=$token->[1];
  428:     $location=~s/^\s*//s;
  429:     $location=~s/\s*$//s;
  430:     $result.=&Apache::edit::editline($location,$bodytext,'',40);
  431:     $result.=&Apache::edit::browse(undef,'textnode');
  432:     $result.= '&nbsp;<label>'.&mt('Import as:').
  433:               '<select name="importmode_'.$Apache::lonxml::curdepth.'">';
  434:     my %options=&Apache::lonlocal::texthash(''        => 'as standard library',
  435:                                             'problem' => 'as problem',
  436:                                             'part'    => 'as problem part(s)');
  437:     foreach my $option (sort(keys(%options))) {
  438:        $result.='<option value="'.$option.'"';
  439:        if ($option eq &Apache::lonxml::get_param('importmode',$parstack,$safeeval)) {
  440:           $result.=' selected="selected"';
  441:        }
  442:        $result.='>'.$options{$option}.'</option>';
  443:     }
  444:     $result.='</select></label>';
  445:     #FIXME this need to convert $bodytext to be a contruction space reference
  446:     #my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
  447:     #$result.="Click<a href=\"$location\">here</a> to edit<br />"
  448:   } elsif ($target eq 'modified') {
  449:       &Apache::edit::get_new_args($token,$parstack,$safeeval,'importmode');
  450:       $result='<import id="'.$token->[2]{'id'}.'" importmode="'.$token->[2]{'importmode'}.'">';
  451:       $result.=&Apache::edit::modifiedfield("/import",$parser);
  452:   } elsif ($target eq 'meta') {
  453:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
  454:     $result.='<import part="'.$Apache::inputtags::part;
  455:     if ($id) {
  456:       $result.='" id="'.$id;
  457:     }
  458:     $result.='" importmode="'.$token->[2]{'importmode'}.'">';
  459:     $result.=$bodytext;
  460:     $result.='</import>';
  461:   }
  462:   return $result;
  463: }
  464: 
  465: sub end_import {
  466:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  467:   pop(@Apache::inputtags::import);
  468:   my $result;
  469:   if ($target eq 'edit' ) { $result=&Apache::edit::end_row.
  470: 				&Apache::edit::end_table(); }
  471:   return $result;
  472: }
  473: 
  474: sub start_storetc {
  475:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  476:   my $result = '';
  477:   &Apache::lonxml::startredirection;
  478:   return $result; 
  479: }
  480: 
  481: sub end_storetc {
  482:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  483:     my $result;
  484:     my $output=&Apache::lonxml::endredirection;
  485:     $output =~ s/\"/\&quot\;/g;
  486:     $result = '{\bf '.$output.'.}}\write\tcfile{\protect\tcpc{ '.$output.'.}{\the\value{relpage}}}';
  487:     return $result;
  488: }
  489: 
  490: 
  491: sub start_physnet {
  492:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  493:     my $bodytext = '/adm/includes/physnet.sty';
  494:     my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
  495:     my $cbistyletext=&Apache::lonnet::getfile($location);
  496: 
  497:     %$style = (%$style,&Apache::style::styleparser($target,$cbistyletext));
  498:     $$parser['-1']->unget_token($token);
  499: #    if ( defined($$style{'physnet'}) ) {
  500: #        &Apache::lonxml::newparser($parser,\$$style{'physnet'});
  501: #    }
  502:     return "";
  503: }
  504: 
  505: sub end_physnet {
  506:   return '';
  507: }
  508: 
  509: sub start_standalone {
  510:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  511:   my $result='';
  512:   if ($target eq 'web' || $target eq 'webgrade') {
  513:     if ( $env{'request.course.id'} ) {
  514:       my $inside = &Apache::lonxml::get_all_text("/standalone",$parser,$style);
  515:     } else {
  516:       $result='<table bgcolor="#E1E1E1" border="2"><tr><td>';
  517:     }
  518:   }
  519:   return $result;
  520: }
  521: 
  522: sub end_standalone {
  523:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  524:   my $result='';
  525:   if ($target eq 'web' || $target eq 'webgrade' ) {
  526:     if ( $env{'request.course.id'} ) {
  527:     } else {
  528:       $result='</td></tr></table>';
  529:     }
  530:   }
  531:   return $result;
  532: }
  533: 
  534: sub start_comment {
  535:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  536:   my $result='';
  537:   if ($target eq 'edit') {
  538:     $result=&Apache::edit::tag_start($target,$token);
  539:     my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
  540:     $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4)
  541:   } elsif ( $target eq 'modified') {
  542:     $result=$token->[4].&Apache::edit::modifiedfield("/comment",$parser);
  543:   } elsif ( $target eq 'web'    || $target eq 'tex'  || $target eq 'grade'   ||
  544: 	    $target eq 'answer' || $target eq 'meta' || $target eq 'analyze' ||
  545: 	    $target eq 'webgrade') {
  546:     #normally throw away comments
  547:     my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
  548:   }
  549:   return $result;
  550: }
  551: 
  552: sub end_comment {
  553:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  554:   if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
  555:   return '';
  556: }
  557: 
  558: 
  559: sub xmlparse {
  560:   my ($string) = @_;
  561:   &Apache::lonxml::debug("xmlparse recursion starting with $string");
  562:   # Apache::run::evaluate does an 'eval' on the name of the subroutine
  563:   # if it detects something that looks like a subroutine, this ends up calling
  564:   # things without any arguments and since perl is nice enough to pass
  565:   # along the default arguments when you don't explicitly say no arguments
  566:   # if you call &xmlparse, it gets &xmlparse passed as it argument.
  567:   # Same thing soccurs with &chemparse.
  568:   if ($string eq '&xmlparse') { return '&xmlparse'; }
  569:   if ($string eq '&chemparse') { return '&chemparse'; }
  570:   my ($target,$token,$tagstack,$parstack,$oldparser,$safeeval,$style)=
  571:     @Apache::scripttag::parser_env;
  572:   my @parser;
  573:   &Apache::lonxml::newparser(\@parser,\$string);
  574:   &Apache::lonxml::startredirection();
  575:   my $result=&Apache::lonxml::inner_xmlparse($target,$tagstack,
  576: 					     $parstack,\@parser,
  577: 					     $safeeval,$style);
  578:   $result.=&Apache::lonxml::endredirection();
  579:   &Apache::lonxml::debug("target is $target xmlparse recursion ending with $result");
  580:   return $result;
  581: }
  582: 
  583: sub start_num {
  584:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
  585:     my $result = '';
  586:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/num",$parser);
  587:     if ($target eq 'tex' || $target eq 'web' || $target eq 'webgrade') {
  588: 	$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
  589: 	if (!$Apache::lonxml::default_homework_loaded) {
  590: 	    &Apache::lonxml::default_homework_load($safeeval);
  591: 	}
  592: 	@Apache::scripttag::parser_env = @_;
  593: 	my $format=&Apache::lonxml::get_param('format',$parstack,$safeeval);
  594: 	$result=&Apache::run::run("return &prettyprint(q\0$inside\0,q\0$format\0);",$safeeval);
  595:     }    
  596:     return $result;
  597: }
  598: 
  599: sub end_num {
  600:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
  601:     my $result = '';
  602:     return $result;
  603: }
  604: 
  605: sub start_parse {
  606:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
  607:     my $result = '';
  608:     if ( $target eq 'web'    || $target eq 'tex'    ||
  609: 	 $target eq 'grade'  || $target eq 'answer' ||
  610: 	 $target eq 'analyze'|| $target eq 'webgrade') {
  611: 	my $inside = &Apache::lonxml::get_all_text_unbalanced("/parse",$parser);
  612: 	$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
  613: 	if (!$Apache::lonxml::default_homework_loaded) {
  614: 	    &Apache::lonxml::default_homework_load($safeeval);
  615: 	}
  616: 	@Apache::scripttag::parser_env = @_;
  617: 	$result=&Apache::run::run("return &xmlparse(q\0$inside\0);",$safeeval);
  618: 	if ($target eq 'grade' || $target eq 'answer' ||
  619: 	    $target eq 'analyze') {
  620: 	    # grade/answer/analyxe should produce no output but if we
  621: 	    # are redirecting, the redirecter should know what to do
  622: 	    # with the output
  623: 	    if (!$Apache::lonxml::redirection) { $result=''; }
  624: 	}
  625:     }
  626:     return $result;
  627: }
  628: 
  629: sub end_parse {
  630:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
  631:     my $result = '';
  632:     return $result;
  633: }
  634: 
  635: sub start_algebra {
  636:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
  637:     my $result = '';
  638:     if ( $target eq 'web'     || $target eq 'tex'    ||
  639: 	 $target eq 'grade'   || $target eq 'answer' ||
  640: 	 $target eq 'analyze' || $target eq 'webgrade') {
  641: 	my $inside = &Apache::lonxml::get_all_text_unbalanced("/algebra",$parser);
  642: 	$inside = &Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
  643: 	if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
  644: 	    my $style=&Apache::lonxml::get_param('style',$parstack,$safeeval);
  645: 	    $result=&Apache::lontexconvert::algebra($inside,$target,$style,$parstack,$safeeval);
  646: 	}
  647: 	$Apache::lonxml::post_evaluate=0;
  648:     }
  649:     return $result;
  650: }
  651: 
  652: sub end_algebra {
  653:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
  654:     my $result = '';
  655:     return $result;
  656: }
  657: 
  658: 1;
  659: __END__
  660: 
  661: =pod
  662: 
  663: =head1 NAME
  664: 
  665: Apache::scripttag.pm
  666: 
  667: =head1 SYNOPSIS
  668: 
  669: implements <script>, <scriptlib>, <parserlib>,
  670: and <import>
  671: 
  672: This is part of the LearningOnline Network with CAPA project
  673: described at http://www.lon-capa.org.
  674: 
  675: =cut
  676: