Annotation of loncom/xml/londefdef.pm, revision 1.398

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.398   ! foxr        4: # $Id: londefdef.pm,v 1.397 2008/11/24 18:55:01 jms Exp $
1.41      sakharuk    5: # 
1.34      www         6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
1.156     sakharuk   28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
1.34      www        29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
                     30: # binary executable programs or libraries distributed by the 
                     31: # Michigan State University (the "Licensee"), but any binaries so 
                     32: # distributed are hereby licensed only for use in the context
                     33: # of a program or computational system for which the Licensee is the 
                     34: # primary author or distributor, and which performs substantial 
                     35: # additional tasks beyond the translation of (La)TeX into HTML.
                     36: # The C source of the Code may not be distributed by the Licensee
                     37: # to any other parties under any circumstances.
                     38: #
1.1       sakharuk   39: 
1.2       albertel   40: package Apache::londefdef; 
1.1       sakharuk   41: 
1.267     albertel   42: use Apache::lonnet;
1.1       sakharuk   43: use strict;
1.124     sakharuk   44: use Apache::lonxml;
1.398   ! foxr       45: use Apache::lontable;
1.57      sakharuk   46: use Apache::File();
1.70      sakharuk   47: use Image::Magick;
1.118     www        48: use Apache::lonmenu();
                     49: use Apache::lonmeta();
1.389     www        50: use Apache::lonlocal;
1.187     albertel   51: use Apache::Constants qw(:common);
1.282     foxr       52: use File::Basename;
1.345     albertel   53: use LONCAPA();
1.302     foxr       54: # use Data::Dumper;
1.160     sakharuk   55: 
1.38      harris41   56: BEGIN {
1.15      sakharuk   57: 
1.135     sakharuk   58:     &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
1.15      sakharuk   59: 
1.188     albertel   60: }
                     61: 
1.398   ! foxr       62: 
1.188     albertel   63: sub initialize_londefdef {
                     64:     $Apache::londefdef::TD_redirection=0;
                     65:     @Apache::londefdef::table = ();
                     66:     $Apache::londefdef::select=0;
1.243     albertel   67:     undef(@Apache::londefdef::description);
                     68:     @Apache::londefdef::DD=(0);
                     69:     @Apache::londefdef::DT=(0);
1.244     albertel   70:     @Apache::londefdef::seenDT=(0);
1.238     albertel   71:     $Apache::londefdef::list_index=0;
1.327     albertel   72:     undef($Apache::londefdef::head);
                     73:     undef($Apache::londefdef::title);
1.3       sakharuk   74: }
1.1       sakharuk   75: 
1.35      sakharuk   76: #======================= TAG SUBROUTINES =====================
1.8       sakharuk   77: #-- <output>
1.21      albertel   78: sub start_output {
1.122     albertel   79:     my ($target) = @_;
                     80:     if ($target eq 'meta') { $Apache::lonxml::metamode--; }
                     81:     return '';
1.21      albertel   82: }
                     83: sub end_output {
1.122     albertel   84:     my ($target) = @_;
                     85:     if ($target eq 'meta') { $Apache::lonxml::metamode++; }
                     86:     return '';
1.21      albertel   87: }
1.4       sakharuk   88: #-- <m> tag
1.33      albertel   89: sub start_m {
1.190     albertel   90:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel   91:     my $currentstring = '';
1.193     albertel   92:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
1.191     albertel   93:     if ($target eq 'web' || $target eq 'analyze') {
1.122     albertel   94: 	&Apache::lonxml::debug("M is starting with:$inside:");
                     95: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                     96: 	if ($eval eq 'on') {
                     97: 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
1.392     bisitz     98: 	    #&Apache::lonxml::debug("M is evaluated to:$inside:");
1.122     albertel   99: 	}
1.317     albertel  100: 	my $tex = $inside;
1.276     albertel  101: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                    102: 	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
1.122     albertel  103: 	if ($Apache::lontexconvert::errorstring) {
1.392     bisitz    104: 	    my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occurred while attempting to convert this TeX: <pre>';
1.317     albertel  105: 	    $tex = &HTML::Entities::encode($tex,'<>&"');
                    106: 	    my ($linenumber) =
                    107: 		($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
                    108: 	    if (defined($linenumber)) {
                    109: 		my @tex=split("\n",$tex);
                    110: 		$tex[$linenumber]='<b><font color="red">'.
                    111: 		    $tex[$linenumber].'</font></b>';
                    112: 		$tex=join("\n",@tex);
                    113: 	    }
                    114: 	    &Apache::lonxml::warning($errormsg.$tex.'</pre>');
1.122     albertel  115: 	    $Apache::lontexconvert::errorstring='';
                    116: 	}
                    117: 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
1.178     albertel  118: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  119:     } elsif ($target eq 'tex') {
1.360     foxr      120: 
1.190     albertel  121: 	$currentstring = $inside;
1.178     albertel  122: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    123: 	if ($eval eq 'on') {
                    124: 	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
                    125: 	}
1.122     albertel  126: 	if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
1.257     albertel  127: 	# detect simple math mode entry exits, and convert them
1.360     foxr      128:         # to use \ensuremath ... unless there's a \verb inside.
                    129: 	if (! ($currentstring=~/\\verb/)) {
1.395     raeburn   130: 	    if ($currentstring=~/^\s*\$[^\$].*\$\s*$/) {
1.360     foxr      131: 		$currentstring=~s/^(\s*)\$/$1/;
                    132: 		$currentstring=~s/\$(\s*)$/$1/;
                    133: 		$currentstring='\ensuremath{'.$currentstring.'}';
                    134: 	    }
1.257     albertel  135: 	}
1.178     albertel  136: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  137:     }
                    138:     return $currentstring;
1.33      albertel  139: }
1.122     albertel  140: 
1.33      albertel  141: sub end_m {
1.122     albertel  142:     my ($target,$token) = @_;
                    143:     my $currentstring = '';
1.204     albertel  144:     if ($target eq 'tex') {
1.122     albertel  145: 	$currentstring = "";
                    146:     }
                    147:     return $currentstring;
1.33      albertel  148: }
1.110     albertel  149: 
                    150: sub start_tthoption {
1.299     albertel  151:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  152:     my $result;
1.325     albertel  153:     if ($target eq 'web' || $target eq 'webgrade') {
1.299     albertel  154: 	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
                    155: 						   $style);
1.122     albertel  156: 	$inside=~s/^\s*//;
1.267     albertel  157: 	if ($env{'browser.mathml'}) {
1.122     albertel  158: 	    &tth::ttmoptions($inside);
                    159: 	} else {
                    160: 	    &tth::tthoptions($inside);
                    161: 	}
                    162:     }
                    163:     return $result;
1.110     albertel  164: }
                    165: 
                    166: sub end_tthoption {
1.122     albertel  167:     my ($target,$token) = @_;
                    168:     my $result;
                    169:     return $result;
1.110     albertel  170: }
                    171: 
1.181     sakharuk  172: #-- <html> tag (end tag optional)
1.100     albertel  173: sub start_html {
                    174:     my ($target,$token) = @_;
                    175:     my $currentstring = '';
1.269     albertel  176:     if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
1.327     albertel  177: 	# start_body() takes care of emitting the <html> 
1.100     albertel  178:     } elsif ($target eq 'tex') {
1.331     albertel  179: 	$currentstring .= 
                    180: 	    '\documentclass[letterpaper,twoside]{article}\raggedbottom';
1.267     albertel  181: 	if (($env{'form.latex_type'}=~'batchmode') ||
                    182:             (!$env{'request.role.adv'})) {$currentstring .='\batchmode';} 
1.217     sakharuk  183: 	$currentstring .= '\newcommand{\keephidden}[1]{}'.
                    184:                           '\renewcommand{\deg}{$^{\circ}$}'.
1.306     foxr      185: 			  '\usepackage{multirow}'.
1.217     sakharuk  186:                           '\usepackage{longtable}'.
                    187:                           '\usepackage{textcomp}'.
                    188:                           '\usepackage{makeidx}'.
                    189:                           '\usepackage[dvips]{graphicx}'.
1.286     foxr      190: 			  '\usepackage{wrapfig}'.
1.248     foxr      191: 			  '\usepackage{picins}'.
1.386     foxr      192: 			  '\usepackage[T1]{fontenc}'."\n".
1.393     raeburn   193:                           '\usepackage{lmodern}'."\n".
1.388     foxr      194: 			  '\usepackage[postscript]{ucs}'."\n".
1.387     foxr      195: 			  '\usepackage[utf8x]{inputenc}'."\n".
                    196: 			  '\usepackage{pifont}' ."\n".
1.385     foxr      197: 			  '\usepackage{latexsym}'."\n".
1.217     sakharuk  198:                           '\usepackage{epsfig}'.
1.398   ! foxr      199: 			  "\\usepackage{xtab}\n".
        !           200: 			  "\\usepackage{tabularx}\n".
        !           201: 			  "\\usepackage{booktabs}\n".
        !           202: 			  "\\usepackage{array}\n".
        !           203: 			  "\\usepackage{colortbl}\n".
        !           204: 			  "\\usepackage{xcolor}\n".
1.217     sakharuk  205:                           '\usepackage{calc}'.
                    206:                           '\usepackage{amsmath}'.
                    207:                           '\usepackage{amssymb}'.
                    208:                           '\usepackage{amsfonts}'.
                    209:                           '\usepackage{amsthm}'.
1.391     onken     210:                           '\usepackage{amscd}';
                    211: 
                    212:         if($env{'form.pdfFormFields'} eq 'yes') {
                    213:             $currentstring .= '\usepackage{hyperref}'.
                    214:                               '\usepackage{eforms}'.
                    215:                               '\usepackage{tabularx}';
                    216:         } 
                    217: 
                    218:         $currentstring .= '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'.
1.217     sakharuk  219:                           '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}';
1.100     albertel  220:     }
                    221:     return $currentstring;
                    222: }
1.122     albertel  223: 
                    224: sub end_html {
1.232     sakharuk  225:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  226:     my $currentstring = '';
1.324     albertel  227:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  228: 	# end_body takes care of the </html>
1.122     albertel  229:     }
                    230:     return $currentstring;
                    231: }
                    232: 
1.181     sakharuk  233: #-- <head> tag (end tag optional)
1.122     albertel  234: sub start_head {
                    235:     my ($target,$token) = @_;
                    236:     my $currentstring = '';
1.324     albertel  237:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  238: 	&Apache::lonxml::startredirection();
1.122     albertel  239:     } 
                    240:     return $currentstring;
                    241: }
                    242: 
                    243: sub end_head {
                    244:     my ($target,$token) = @_;
                    245:     my $currentstring = '';
1.324     albertel  246:     if (($target eq 'web'      && $env{'request.state'} eq 'published') ||
                    247: 	($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
1.327     albertel  248: 	# in case there is a </head> but no <head>
                    249: 	if ($Apache::lonxml::redirection) {
                    250: 	    $Apache::londefdef::head = &Apache::lonxml::endredirection();
                    251: 	}
1.122     albertel  252:     } 
                    253:     return $currentstring;
                    254: }
                    255: 
1.181     sakharuk  256: #-- <map> tag (end tag required)
1.122     albertel  257: sub start_map {
                    258:     my ($target,$token) = @_;
                    259:     my $currentstring = '';
1.325     albertel  260:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  261: 	$currentstring = $token->[4];     
                    262:     } 
                    263:     return $currentstring;
                    264: }
                    265: 
                    266: sub end_map {
                    267:     my ($target,$token) = @_;
                    268:     my $currentstring = '';
1.325     albertel  269:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  270: 	$currentstring = $token->[2];    
                    271:     } 
                    272:     return $currentstring;
                    273: }
                    274: 
1.181     sakharuk  275: #-- <select> tag (end tag required)
1.122     albertel  276: sub start_select {
                    277:     my ($target,$token) = @_;
                    278:     my $currentstring = '';
1.325     albertel  279:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  280: 	$currentstring = $token->[4];     
1.181     sakharuk  281:     }  elsif ($target eq 'tex') {
                    282: 	$Apache::londefdef::select=0;
                    283:     }
1.122     albertel  284:     return $currentstring;
                    285: }
                    286: 
                    287: sub end_select {
                    288:     my ($target,$token) = @_;
                    289:     my $currentstring = '';
1.325     albertel  290:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  291: 	$currentstring = $token->[2];    
                    292:     } 
                    293:     return $currentstring;
                    294: }
                    295: 
1.181     sakharuk  296: #-- <option> tag (end tag optional)
1.122     albertel  297: sub start_option {
1.181     sakharuk  298:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  299:     my $currentstring = '';
1.325     albertel  300:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  301: 	$currentstring = $token->[4];     
1.181     sakharuk  302:     } elsif ($target eq 'tex') {
                    303: 	$Apache::londefdef::select++;
                    304: 	if ($Apache::londefdef::select == 1) {
                    305: 	    $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
                    306: 	} else {
                    307: 	    $currentstring='\keephidden{';
                    308: 	}
                    309:     }
1.122     albertel  310:     return $currentstring;
                    311: }
                    312: 
                    313: sub end_option {
                    314:     my ($target,$token) = @_;
                    315:     my $currentstring = '';
1.325     albertel  316:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  317: 	$currentstring = $token->[2];    
1.181     sakharuk  318:     }  elsif ($target eq 'tex') {
                    319: 	$currentstring='}';
                    320:     }
1.122     albertel  321:     return $currentstring;
                    322: }
                    323: 
1.181     sakharuk  324: #-- <input> tag (end tag forbidden)
1.122     albertel  325: sub start_input {
                    326:     my ($target,$token) = @_;
                    327:     my $currentstring = '';
1.325     albertel  328:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  329: 	$currentstring = $token->[4];     
                    330:     } 
                    331:     return $currentstring;
                    332: }
                    333: 
                    334: sub end_input {
                    335:     my ($target,$token) = @_;
                    336:     my $currentstring = '';
1.325     albertel  337:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  338: 	$currentstring = $token->[2];    
                    339:     } 
                    340:     return $currentstring;
                    341: }
                    342: 
1.181     sakharuk  343: #-- <textarea> tag (end tag required)
1.122     albertel  344: sub start_textarea {
                    345:     my ($target,$token) = @_;
                    346:     my $currentstring = '';
1.325     albertel  347:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  348: 	$currentstring = $token->[4];     
                    349:     } 
                    350:     return $currentstring;
                    351: }
                    352: 
                    353: sub end_textarea {
                    354:     my ($target,$token) = @_;
                    355:     my $currentstring = '';
1.325     albertel  356:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  357: 	$currentstring = $token->[2];    
                    358:     } 
                    359:     return $currentstring;
                    360: }
                    361: 
1.181     sakharuk  362: #-- <form> tag (end tag required)
1.122     albertel  363: sub start_form {
                    364:     my ($target,$token) = @_;
                    365:     my $currentstring = '';
1.325     albertel  366:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  367: 	$currentstring = $token->[4];     
                    368:     } 
                    369:     return $currentstring;
                    370: }
                    371: 
                    372: sub end_form {
                    373:     my ($target,$token) = @_;
                    374:     my $currentstring = '';
1.325     albertel  375:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  376: 	$currentstring = $token->[2];    
                    377:     } 
                    378:     return $currentstring;
                    379: }
                    380: 
1.181     sakharuk  381: #-- <title> tag (end tag required)
1.122     albertel  382: sub start_title {
1.327     albertel  383:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  384:     my $currentstring = '';
1.324     albertel  385:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  386: 	$Apache::londefdef::title = 
                    387: 	    &Apache::lonxml::get_all_text('/title',$parser,$style);
1.122     albertel  388:     } elsif ($target eq 'tex') {
1.166     sakharuk  389: 	$currentstring .= '\keephidden{Title of the document:  ' 
1.122     albertel  390:     }
                    391:     if ($target eq 'meta') {
                    392: 	$currentstring='<title>';
1.185     albertel  393: 	&start_output($target);
1.122     albertel  394:     }
                    395:     return $currentstring;
                    396: }
                    397: 
                    398: sub end_title {
                    399:     my ($target,$token) = @_;
                    400:     my $currentstring = '';
1.324     albertel  401:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  402: 	# start_title takes care of swallowing the title
1.122     albertel  403:     } elsif ($target eq 'tex') {
                    404: 	$currentstring .= '}';
                    405:     }  
                    406:     if ($target eq 'meta') {
1.185     albertel  407: 	&end_output($target);
1.122     albertel  408: 	$currentstring='</title>';
                    409:     } 
                    410:     return $currentstring;
                    411: }
                    412: 
1.181     sakharuk  413: #-- <meta> tag (end tag forbidden)
1.122     albertel  414: sub start_meta {
1.299     albertel  415:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  416:     my $currentstring = '';
1.325     albertel  417:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  418: 	my $args='';
                    419: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    420: 	if ($args eq '') {
1.299     albertel  421: 	    &Apache::lonxml::get_all_text("/meta",$parser,$style);
1.122     albertel  422: 	} else {
                    423: 	    $currentstring = $token->[4];
1.1       sakharuk  424: 	}
1.135     sakharuk  425:     } elsif ($target eq 'meta') {
1.122     albertel  426: 	unless (&Apache::lonxml::get_param
                    427: 		('http-equiv',$parstack,$safeeval,undef,1)) {
                    428: 	    my $name=$token->[2]->{'name'};
                    429: 	    $name=~tr/A-Z/a-z/;
                    430: 	    $name=~s/\s/\_/gs;
                    431: 	    $name=~s/\W//gs;
                    432: 	    if ($name) {
1.154     www       433: 		$currentstring='<'.$name;
                    434:                  my $display=&Apache::lonxml::get_param
                    435: 		('display',$parstack,$safeeval,undef,1);
                    436:                 if ($display) {
                    437:                     $display=~s/\"/\'/g;
                    438: 		    $currentstring.=' display="'.$display.'"';
                    439:                 }
                    440: 		$currentstring.='>'.
1.122     albertel  441: 		    &Apache::lonxml::get_param
                    442: 			('content',$parstack,$safeeval,undef,1).
1.135     sakharuk  443: 			'</'.$name.'>';
1.1       sakharuk  444: 	    }
1.154     www       445:             my $display=&Apache::lonxml::get_param
                    446: 		('display',$parstack,$safeeval,undef,1);
                    447:             if ($display) {
1.204     albertel  448: 		$display=&HTML::Entities::encode($display,'<>&"');
1.154     www       449: 		$currentstring.='<'.$name.'.display>'.$display.
                    450:                                '</'.$name.'.display>';
                    451:             }
1.1       sakharuk  452: 	}
1.135     sakharuk  453:     } elsif ($target eq 'tex') {
1.151     sakharuk  454: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    455: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
                    456: 	if ((not defined $content) && (not defined $name)) {
                    457: 	    &Apache::lonxml::startredirection();
                    458: 	}
1.374     albertel  459:     } elsif ($target eq 'edit') {
                    460: 	$currentstring .= &Apache::edit::tag_start($target,$token);
                    461: 	$currentstring .= &Apache::edit::text_arg('Name:','name',$token,30);
                    462: 	$currentstring .= &Apache::edit::text_arg('Content:','content',$token,70);
                    463: 	$currentstring .= &Apache::edit::end_row();
                    464:     } elsif ($target eq 'modified') {
                    465: 	my $constructtag =
                    466: 	    &Apache::edit::get_new_args($token,$parstack,$safeeval,
                    467: 					'name','content');
                    468: 	if ($constructtag) { $currentstring = &Apache::edit::rebuild_tag($token); }
1.122     albertel  469:     }
                    470:     return $currentstring;
                    471: }
                    472: 
                    473: sub end_meta {
1.165     albertel  474:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  475:     my $currentstring = '';
1.325     albertel  476:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  477: 	my $args='';
                    478: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    479: 	if ($args ne '') {
1.121     www       480: 	    $currentstring = $token->[4];
1.122     albertel  481: 	}
1.135     sakharuk  482:     } elsif ($target eq 'tex') {
1.165     albertel  483: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    484: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
1.164     albertel  485: 	if ((not defined $content) && (not defined $name)) {
1.169     albertel  486: 	    &Apache::lonxml::endredirection();
1.164     albertel  487: 	}
1.135     sakharuk  488:     }
1.122     albertel  489:     return $currentstring;
                    490: }
                    491: 
1.374     albertel  492: sub insert_meta {
                    493:     return '
                    494:     <meta />';
                    495: }
                    496: 
1.121     www       497: # accessrule
1.122     albertel  498: sub start_accessrule {
1.299     albertel  499:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  500:     my $currentstring = '';
1.373     albertel  501:     my $eff  =&Apache::lonxml::get_param('effect',$parstack,$safeeval,undef,1);
                    502:     my $realm=&Apache::lonxml::get_param('realm', $parstack,$safeeval,undef,1);
                    503:     my $role =&Apache::lonxml::get_param('role',  $parstack,$safeeval,undef,1);
                    504:     my $type =&Apache::lonxml::get_param('type',  $parstack,$safeeval,undef,1);
                    505: 
                    506:     my ($dom,$crs,$sec,$separator);
1.369     albertel  507:     if ($type eq 'user') {
1.373     albertel  508: 	($dom,$crs,$sec)=split(m{/},$realm);
1.369     albertel  509: 	$crs = &LONCAPA::clean_username($crs);
1.373     albertel  510: 	$separator = '/';
1.369     albertel  511:     } else {
1.373     albertel  512: 	($dom,$crs,$sec)=split(/\_/,$realm);
1.369     albertel  513: 	$crs = &LONCAPA::clean_courseid($crs);
1.373     albertel  514: 	$separator = '_';
1.369     albertel  515:     }
1.373     albertel  516:     $dom = &LONCAPA::clean_domain($dom);
                    517: 
1.369     albertel  518:     $sec =~s/\W//;
                    519:     $realm = $dom;
1.373     albertel  520:     if ($crs =~ /\S/) { $realm .= $separator.$crs; }
                    521:     if ($sec =~ /\S/) { $realm .= $separator.$sec; }
1.369     albertel  522:     $role=~s/\W//g;
                    523: 
1.122     albertel  524:     if ($target eq 'web') {
                    525: 	my $args='';
                    526: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    527: 	if ($args eq '') {
1.299     albertel  528: 	    &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
1.122     albertel  529: 	} else {
                    530: 	    $currentstring = $token->[4];
                    531: 	}
                    532:     }
                    533:     if ($target eq 'meta') {
1.369     albertel  534: 	$currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
1.122     albertel  535:     }
                    536:     return $currentstring;
                    537: }
                    538: 
                    539: sub end_accessrule {
                    540:     my ($target,$token,$tagstack,$parstack,$parser) = @_;
                    541:     my $currentstring = '';
                    542:     if ($target eq 'web') {
                    543: 	my $args='';
                    544: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    545: 	if ($args ne '') {
                    546: 	    $currentstring = $token->[4];
                    547: 	}
                    548:     } 
                    549:     return $currentstring;
                    550: }
                    551: 
1.366     albertel  552: sub generate_css_links {
                    553:     my $links;
                    554:     my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
                    555:     if ($css_href =~ /\S/) {
                    556: 	&Apache::lonxml::extlink($css_href);
                    557: 	$links .= 
                    558: 	    '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
                    559:     }
                    560:     return $links;
                    561: }
                    562: 
1.181     sakharuk  563: #-- <body> tag (end tag required)
1.122     albertel  564: sub start_body {
                    565:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    566:     my $currentstring = '';
1.244     albertel  567: 
1.324     albertel  568:     if ($target eq 'web' || $target eq 'webgrade') {
1.170     albertel  569: 	if ($Apache::lonhomework::parsing_a_problem) {
                    570: 	    &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
                    571: 	    return '';
                    572: 	}
1.122     albertel  573: 	
1.327     albertel  574: 	if (&is_inside_of($tagstack, "head")) {
                    575: 	    &end_head(@_);
1.122     albertel  576: 	}
1.366     albertel  577: 	
                    578: 	my $extra_head = &generate_css_links();
                    579: 
1.327     albertel  580: 	$currentstring = 
                    581: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
1.366     albertel  582: 					   $Apache::londefdef::head
                    583: 					      .$extra_head,
1.327     albertel  584: 					   {'add_entries'    => $token->[2],
                    585: 					    'no_title'       => 1,
                    586: 					    'force_register' => 1});
                    587: 
1.267     albertel  588: 	if ($env{'request.state'} ne 'published') {
1.378     albertel  589: 	    $currentstring.=&Apache::lonmenu::constspaceform();
                    590: 	    $currentstring.=&Apache::londefdef::edit_controls();
1.1       sakharuk  591: 	}
1.201     albertel  592: 	$currentstring.=&Apache::lonxml::message_location();
1.122     albertel  593:     } elsif ($target eq 'tex') {
                    594: 	$currentstring = '\begin{document}';  
                    595:     } 
                    596:     return $currentstring;
                    597: }
                    598: 
1.376     albertel  599: sub edit_controls {
1.389     www       600:     my $result .= '
1.376     albertel  601: <form method="post">
1.389     www       602: <div class="LC_edit_problem_header">
                    603: <div class="LC_edit_problem_header_row1">'.
                    604: &Apache::lonxml::renderingoptions().'
                    605: <input type="submit" name="changeproblemmode" value="'.&mt('Change View').'" />
                    606: </div>
1.394     bisitz    607: <div class="LC_edit_problem_header_edit_row"><input type="submit" name="editmode" accesskey="e" value="'.&mt('Edit').'" /></div></div>
1.376     albertel  608: </form>
1.389     www       609: <br />';
1.376     albertel  610:     return $result;
                    611: }
                    612: 
1.122     albertel  613: sub end_body {
1.259     albertel  614:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      615:     my $currentstring = &end_p();	# Close off unclosed <p>
1.324     albertel  616:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  617: 	$currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
1.122     albertel  618:     } elsif ($target eq 'tex') {
1.277     foxr      619: 	$currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';  
1.122     albertel  620:     } 
                    621:     return $currentstring;
                    622: }
                    623: 
1.309     albertel  624: # \begin{center} causes a new paragprah spacing that looks odd inside 
1.337     foxr      625: # of a table cell.  Same at the end of a \center but with a slightly
                    626: # larger space .. hence center_correction and center_end_correction.
                    627: #
                    628: sub center_correction { return '\vspace*{-6 mm}'; } 
                    629: sub center_end_correction { return '\vspace*{-7 mm}'; }
                    630: 
1.181     sakharuk  631: #-- <center> tag (end tag required)
1.122     albertel  632: sub start_center {
1.309     albertel  633:     my ($target,$token,$tagstack) = @_;
1.279     foxr      634:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  635:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr      636: 	$currentstring .= $token->[4];     
1.122     albertel  637:     } elsif ($target eq 'tex') {
1.309     albertel  638: 	if (&is_inside_of($tagstack, "table")) {
                    639: 	    $currentstring .= &center_correction();
                    640: 	}
1.277     foxr      641: 	$currentstring .= '\begin{center}';  
1.144     sakharuk  642:     }
1.122     albertel  643:     return $currentstring;
                    644: }
                    645: 
                    646: sub end_center {
1.309     albertel  647:     my ($target,$token,$tagstack) = @_;
1.122     albertel  648:     my $currentstring = '';
1.325     albertel  649:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  650: 	$currentstring = $token->[2];     
                    651:     } elsif ($target eq 'tex') {
                    652: 	$currentstring = '\end{center}';  
1.337     foxr      653: 	if (&is_inside_of($tagstack, "table")) {
                    654: 	    $currentstring .= &center_end_correction();
                    655: 	}
1.144     sakharuk  656:     }
1.122     albertel  657:     return $currentstring;
                    658: }
                    659: 
1.181     sakharuk  660: #-- <b> tag (end tag required)
1.279     foxr      661: #      NOTE: In TeX mode disables internal <p>
1.122     albertel  662: sub start_b {
                    663:     my ($target,$token) = @_;
                    664:     my $currentstring = '';
1.325     albertel  665:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  666: 	$currentstring = $token->[4];     
                    667:     } elsif ($target eq 'tex') {
1.279     foxr      668: 	&disable_para();
                    669: 	$currentstring .= '\textbf{';  
1.122     albertel  670:     } 
                    671:     return $currentstring;
                    672: }
                    673: 
                    674: sub end_b {
                    675:     my ($target,$token) = @_;
                    676:     my $currentstring = '';
1.325     albertel  677:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  678: 	$currentstring = $token->[2];     
                    679:     } elsif ($target eq 'tex') {
1.279     foxr      680: 	&enable_para();
                    681: 	$currentstring = '}';
1.122     albertel  682:     } 
                    683:     return $currentstring;
                    684: }
1.35      sakharuk  685: 
1.181     sakharuk  686: #-- <strong> tag (end tag required)
1.279     foxr      687: #    NOTE: in TeX mode disables internal <p>
1.122     albertel  688: sub start_strong {
                    689:     my ($target,$token) = @_;
                    690:     my $currentstring = '';
1.325     albertel  691:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  692: 	$currentstring = $token->[4];     
                    693:     } elsif ($target eq 'tex') {
1.279     foxr      694: 	&disable_para();
1.122     albertel  695: 	$currentstring = '\textbf{';  
                    696:     } 
                    697:     return $currentstring;
                    698: }
                    699: 
                    700: sub end_strong {
                    701:     my ($target,$token) = @_;
                    702:     my $currentstring = '';
1.325     albertel  703:     if ($target eq 'web' || $target eq 'webgrade') {	
1.122     albertel  704: 	$currentstring = $token->[2];     
                    705:     } elsif ($target eq 'tex') {
1.279     foxr      706: 	&enable_para();
1.122     albertel  707: 	$currentstring = '}';  
1.144     sakharuk  708:     }
1.122     albertel  709:     return $currentstring;
                    710: }
                    711: 
1.181     sakharuk  712: #-- <h1> tag (end tag required)
1.122     albertel  713: sub start_h1 {
1.125     sakharuk  714:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      715:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  716:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  717: 	$currentstring .= $token->[4];
                    718:     } elsif ($target eq 'tex') {
1.125     sakharuk  719: 	my $pre;
1.199     albertel  720: 	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
1.212     sakharuk  721: 	if ($align eq 'center') {
1.125     sakharuk  722: 	    $pre='\begin{center}';
                    723: 	} elsif ($align eq 'left') {
                    724: 	    $pre='\rlap{';
                    725: 	} elsif ($align eq 'right') {
                    726: 	    $pre=' \hfill \llap{';
                    727: 	}
                    728: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    729: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      730: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  731:     } elsif ($target eq 'meta') {
1.277     foxr      732: 	$currentstring.='<subject>';
1.185     albertel  733: 	&start_output($target);
1.122     albertel  734:     }
                    735:     return $currentstring;
                    736: }
                    737: 
                    738: sub end_h1 {
1.125     sakharuk  739:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  740:     my $currentstring = '';
1.325     albertel  741:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  742: 	$currentstring .= $token->[2];
                    743:     } elsif ($target eq 'tex') {
1.212     sakharuk  744: 	my $post='\vskip 0 mm ';
1.125     sakharuk  745: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  746: 	if ($align eq 'center') {
1.125     sakharuk  747: 	    $post='\end{center}';
                    748: 	} elsif ($align eq 'left') {
                    749: 	    $post='} \hfill'.'\vskip 0 mm ';
                    750: 	} elsif ($align eq 'right') {
                    751: 	    $post='}'.'\vskip 0 mm ';
                    752: 	}
                    753: 	$currentstring .= '}}'.$post;
1.122     albertel  754:     } elsif ($target eq 'meta') {
1.185     albertel  755: 	&end_output($target);
1.122     albertel  756: 	$currentstring='</subject>';
                    757:     } 
                    758:     return $currentstring;
                    759: }
                    760: 
1.35      sakharuk  761: #-- <h2> tag
1.122     albertel  762: sub start_h2 {
1.125     sakharuk  763:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      764:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  765:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  766: 	$currentstring .= $token->[4];
                    767:     } elsif ($target eq 'tex') {
1.125     sakharuk  768: 	my $pre;
                    769: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  770: 	if ($align eq 'center') {
1.125     sakharuk  771: 	    $pre='\begin{center}';
                    772: 	} elsif ($align eq 'left') {
                    773: 	    $pre='\rlap{';
                    774: 	} elsif ($align eq 'right') {
                    775: 	    $pre=' \hfill \llap{';
                    776: 	}
                    777: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    778: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      779: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  780:     } 
                    781:     return $currentstring;
                    782: }
                    783: 
                    784: sub end_h2 {
1.125     sakharuk  785:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  786:     my $currentstring = '';
1.325     albertel  787:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  788: 	$currentstring .= $token->[2];
                    789:     } elsif ($target eq 'tex') {
1.212     sakharuk  790: 	my $post='\vskip 0 mm ';
1.125     sakharuk  791: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  792: 	if ($align eq 'center') {
1.125     sakharuk  793: 	    $post='\end{center}';
                    794: 	} elsif ($align eq 'left') {
                    795: 	    $post='} \hfill'.'\vskip 0 mm ';
                    796: 	} elsif ($align eq 'right') {
                    797: 	    $post='}'.'\vskip 0 mm ';
                    798: 	}
                    799: 	$currentstring .= '}}'.$post;
1.122     albertel  800:     } 
                    801:     return $currentstring;
                    802: }
                    803: 
1.35      sakharuk  804: #-- <h3> tag
1.122     albertel  805: sub start_h3 {
1.125     sakharuk  806:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      807:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  808:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  809: 	$currentstring .= $token->[4];
                    810:     } elsif ($target eq 'tex') {
1.125     sakharuk  811: 	my $pre;
                    812: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  813: 	if ($align eq 'center') {
1.125     sakharuk  814: 	    $pre='\begin{center}';
                    815: 	} elsif ($align eq 'left') {
                    816: 	    $pre='\rlap{';
                    817: 	} elsif ($align eq 'right') {
                    818: 	    $pre=' \hfill \llap{';
                    819: 	}
                    820: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    821: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      822: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  823:     } 
                    824:     return $currentstring;
                    825: }
                    826: 
                    827: sub end_h3 {
1.125     sakharuk  828:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  829:     my $currentstring = '';
1.325     albertel  830:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  831: 	$currentstring .= $token->[2];
                    832:     } elsif ($target eq 'tex') {
1.212     sakharuk  833: 	my $post='\vskip 0 mm ';
1.125     sakharuk  834: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  835: 	if ($align eq 'center') {
1.125     sakharuk  836: 	    $post='\end{center}';
                    837: 	} elsif ($align eq 'left') {
                    838: 	    $post='} \hfill'.'\vskip 0 mm ';
                    839: 	} elsif ($align eq 'right') {
                    840: 	    $post='}'.'\vskip 0 mm ';
                    841: 	}
                    842: 	$currentstring .= '}}'.$post;
1.122     albertel  843:     } 
                    844:     return $currentstring;
                    845: }
                    846: 
1.35      sakharuk  847: #-- <h4> tag
1.122     albertel  848: sub start_h4 {
1.125     sakharuk  849:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      850:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  851:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  852: 	$currentstring .= $token->[4];
                    853:     } elsif ($target eq 'tex') {
1.125     sakharuk  854: 	my $pre;
                    855: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  856: 	if ($align eq 'center') {
1.125     sakharuk  857: 	    $pre='\begin{center}';
                    858: 	} elsif ($align eq 'left') {
                    859: 	    $pre='\rlap{';
                    860: 	} elsif ($align eq 'right') {
                    861: 	    $pre=' \hfill \llap{';
                    862: 	}
                    863: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    864: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      865: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  866:     } 
                    867:     return $currentstring;
                    868: }
                    869: 
                    870: sub end_h4 {
1.125     sakharuk  871:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  872:     my $currentstring = '';
1.325     albertel  873:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  874: 	$currentstring .= $token->[2];
                    875:     } elsif ($target eq 'tex') {
1.212     sakharuk  876: 	my $post='\vskip 0 mm ';
1.125     sakharuk  877: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  878: 	if ($align eq 'center') {
1.125     sakharuk  879: 	    $post='\end{center}';
                    880: 	} elsif ($align eq 'left') {
                    881: 	    $post='} \hfill'.'\vskip 0 mm ';
                    882: 	} elsif ($align eq 'right') {
                    883: 	    $post='}'.'\vskip 0 mm ';
                    884: 	}
                    885: 	$currentstring .= '}}'.$post;
1.122     albertel  886:     } 
                    887:     return $currentstring;
                    888: }
                    889: 
1.35      sakharuk  890: #-- <h5> tag
1.122     albertel  891: sub start_h5 {
1.125     sakharuk  892:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      893:     my $currentstring = &end_p();	# Close off any prior paras.
1.325     albertel  894:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  895: 	$currentstring .= $token->[4];
                    896:     } elsif ($target eq 'tex') {
1.125     sakharuk  897: 	my $pre;
                    898: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  899: 	if ($align eq 'center') {
1.125     sakharuk  900: 	    $pre='\begin{center}';
                    901: 	} elsif ($align eq 'left') {
                    902: 	    $pre='\rlap{';
                    903: 	} elsif ($align eq 'right') {
                    904: 	    $pre=' \hfill \llap{';
                    905: 	}
                    906: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    907: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      908: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  909:     } 
                    910:     return $currentstring;
                    911: }
                    912: 
                    913: sub end_h5 {
1.125     sakharuk  914:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  915:     my $currentstring = '';
1.325     albertel  916:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  917: 	$currentstring .= $token->[2];
                    918:     } elsif ($target eq 'tex') {
1.212     sakharuk  919: 	my $post='\vskip 0 mm ';
1.125     sakharuk  920: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  921: 	if ($align eq 'center') {
1.125     sakharuk  922: 	    $post='\end{center}';
                    923: 	} elsif ($align eq 'left') {
                    924: 	    $post='} \hfill'.'\vskip 0 mm ';
                    925: 	} elsif ($align eq 'right') {
                    926: 	    $post='}'.'\vskip 0 mm ';
                    927: 	}
                    928: 	$currentstring .= '}}'.$post;
1.122     albertel  929:     } 
                    930:     return $currentstring;
                    931: }
                    932: 
1.35      sakharuk  933: #-- <h6> tag
1.122     albertel  934: sub start_h6 {
1.125     sakharuk  935:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      936:     my $currentstring = &end_p();	# Close off any prior paras.
1.325     albertel  937:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  938: 	$currentstring .= $token->[4];
                    939:     } elsif ($target eq 'tex') {
1.125     sakharuk  940: 	my $pre;
                    941: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  942: 	if ($align eq 'center') {
1.125     sakharuk  943: 	    $pre='\begin{center}';
                    944: 	} elsif ($align eq 'left') {
                    945: 	    $pre='\rlap{';
                    946: 	} elsif ($align eq 'right') {
                    947: 	    $pre=' \hfill \llap{';
                    948: 	}
                    949: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    950: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      951: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  952:     } 
                    953:     return $currentstring;
                    954: }
                    955: 
                    956: sub end_h6 {
1.125     sakharuk  957:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  958:     my $currentstring = '';
1.325     albertel  959:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  960: 	$currentstring .= $token->[2];
                    961:     } elsif ($target eq 'tex') {
1.212     sakharuk  962: 	my $post='\vskip 0 mm ';
1.125     sakharuk  963: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  964: 	if ($align eq 'center') {
1.125     sakharuk  965: 	    $post='\end{center}';
                    966: 	} elsif ($align eq 'left') {
                    967: 	    $post='} \hfill'.'\vskip 0 mm ';
                    968: 	} elsif ($align eq 'right') {
                    969: 	    $post='}'.'\vskip 0 mm ';
                    970: 	}
                    971: 	$currentstring .= '}}'.$post;
1.122     albertel  972:     } 
                    973:     return $currentstring;
                    974: }
                    975: 
1.181     sakharuk  976: #--- <cite> tag (end tag required)
1.122     albertel  977: sub start_cite {
                    978:     my ($target,$token) = @_;
                    979:     my $currentstring = '';
1.325     albertel  980:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  981: 	$currentstring .= $token->[4];
                    982:     } elsif ($target eq 'tex') {
1.179     sakharuk  983: 	$currentstring .= '\textit{';
1.144     sakharuk  984:     }
1.122     albertel  985:     return $currentstring;
                    986: }
                    987: 
                    988: sub end_cite {
                    989:     my ($target,$token) = @_;
                    990:     my $currentstring = '';
1.325     albertel  991:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  992: 	$currentstring .= $token->[2];
                    993:     } elsif ($target eq 'tex') {
1.179     sakharuk  994: 	$currentstring .= '}';
1.144     sakharuk  995:     }
1.122     albertel  996:     return $currentstring;
                    997: }
                    998: 
1.181     sakharuk  999: #-- <i> tag (end tag required)
1.122     albertel 1000: sub start_i {
                   1001:     my ($target,$token) = @_;
                   1002:     my $currentstring = '';
1.325     albertel 1003:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1004: 	$currentstring .= $token->[4];
                   1005:     } elsif ($target eq 'tex') {
                   1006: 	$currentstring .= '\textit{';
1.144     sakharuk 1007:     }
1.122     albertel 1008:     return $currentstring;
                   1009: }
                   1010: 
                   1011: sub end_i {
                   1012:     my ($target,$token) = @_;
                   1013:     my $currentstring = '';
1.325     albertel 1014:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1015: 	$currentstring .= $token->[2];
                   1016:     } elsif ($target eq 'tex') {
                   1017: 	$currentstring .= '}';
                   1018:     } 
                   1019:     return $currentstring;
                   1020: }
                   1021: 
1.181     sakharuk 1022: #-- <address> tag (end tag required)
1.122     albertel 1023: sub start_address {
                   1024:     my ($target,$token) = @_;
                   1025:     my $currentstring = '';
1.325     albertel 1026:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1027: 	$currentstring .= $token->[4];
                   1028:     } elsif ($target eq 'tex') {
1.179     sakharuk 1029: 	$currentstring .= '\textit{';
1.144     sakharuk 1030:     }
1.122     albertel 1031:     return $currentstring;
                   1032: }
                   1033: 
                   1034: sub end_address {
                   1035:     my ($target,$token) = @_;
                   1036:     my $currentstring = '';
1.325     albertel 1037:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1038: 	$currentstring .= $token->[2];
                   1039:     } elsif ($target eq 'tex') {
1.179     sakharuk 1040: 	$currentstring .= '}';
1.122     albertel 1041:     }
                   1042:     return $currentstring;
                   1043: }
                   1044: 
1.181     sakharuk 1045: #-- <dfn> tag (end tag required)
1.122     albertel 1046: sub start_dfn {
                   1047:     my ($target,$token) = @_;
                   1048:     my $currentstring = '';
1.325     albertel 1049:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1050: 	$currentstring .= $token->[4];
                   1051:     } elsif ($target eq 'tex') {
1.179     sakharuk 1052: 	$currentstring .= '\textit{';
1.122     albertel 1053:     } 
                   1054:     return $currentstring;
                   1055: }
                   1056: 
                   1057: sub end_dfn {
                   1058:     my ($target,$token) = @_;
                   1059:     my $currentstring = '';
1.325     albertel 1060:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1061: 	$currentstring .= $token->[2];
                   1062:     } elsif ($target eq 'tex') {
1.179     sakharuk 1063: 	$currentstring .= '}';
1.144     sakharuk 1064:     }
1.122     albertel 1065:     return $currentstring;
                   1066: }
                   1067: 
1.181     sakharuk 1068: #-- <tt> tag (end tag required)
1.122     albertel 1069: sub start_tt {
                   1070:     my ($target,$token) = @_;
                   1071:     my $currentstring = '';
1.325     albertel 1072:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1073: 	$currentstring .= $token->[4];
                   1074:     } elsif ($target eq 'tex') {
                   1075: 	$currentstring .= '\texttt{';
1.144     sakharuk 1076:     }
1.122     albertel 1077:     return $currentstring;
                   1078: }
                   1079: 
                   1080: sub end_tt {
                   1081:     my ($target,$token) = @_;
                   1082:     my $currentstring = '';
1.325     albertel 1083:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1084: 	$currentstring .= $token->[2];
                   1085:     } elsif ($target eq 'tex') {
                   1086: 	$currentstring .= '}';
                   1087:     }
                   1088:     return $currentstring;
                   1089: }
                   1090: 
1.181     sakharuk 1091: #-- <kbd> tag (end tag required)
1.122     albertel 1092: sub start_kbd {
                   1093:     my ($target,$token) = @_;
                   1094:     my $currentstring = '';
1.325     albertel 1095:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1096: 	$currentstring .= $token->[4];
                   1097:     } elsif ($target eq 'tex') {
1.179     sakharuk 1098: 	$currentstring .= '\texttt{';
1.144     sakharuk 1099:     }
1.122     albertel 1100:     return $currentstring;
                   1101: }
                   1102: 
                   1103: sub end_kbd {
                   1104:     my ($target,$token) = @_;
                   1105:     my $currentstring = '';
1.325     albertel 1106:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1107: 	$currentstring .= $token->[2];
                   1108:     } elsif ($target eq 'tex') {
1.179     sakharuk 1109: 	$currentstring .= '}';
1.144     sakharuk 1110:     }
1.122     albertel 1111:     return $currentstring;
                   1112: }
                   1113: 
1.181     sakharuk 1114: #-- <code> tag (end tag required)
1.122     albertel 1115: sub start_code {
                   1116:     my ($target,$token) = @_;
                   1117:     my $currentstring = '';
1.325     albertel 1118:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1119: 	$currentstring .= $token->[4];
                   1120:     } elsif ($target eq 'tex') {
                   1121: 	$currentstring .= '\texttt{';
                   1122:     } 
                   1123:     return $currentstring;
                   1124: }
                   1125: 
                   1126: sub end_code {
                   1127:     my ($target,$token) = @_;
                   1128:     my $currentstring = '';
1.325     albertel 1129:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1130: 	$currentstring .= $token->[2];
                   1131:     } elsif ($target eq 'tex') {
                   1132: 	$currentstring .= '}';
                   1133:     } 
                   1134:     return $currentstring;
                   1135: }
                   1136: 
1.181     sakharuk 1137: #-- <em> tag (end tag required)
1.122     albertel 1138: sub start_em {
                   1139:     my ($target,$token) = @_;
                   1140:     my $currentstring = '';
1.325     albertel 1141:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1142: 	$currentstring .= $token->[4];
                   1143:     } elsif ($target eq 'tex') {
                   1144: 	$currentstring .= '\emph{';
1.144     sakharuk 1145:     }
1.122     albertel 1146:     return $currentstring;
                   1147: }
                   1148: 
                   1149: sub end_em {
                   1150:     my ($target,$token) = @_;
                   1151:     my $currentstring = '';
1.325     albertel 1152:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1153: 	$currentstring .= $token->[2];
                   1154:     } elsif ($target eq 'tex') {
                   1155: 	$currentstring .= '}';
1.144     sakharuk 1156:     } 
1.122     albertel 1157:     return $currentstring;
                   1158: }
                   1159: 
1.181     sakharuk 1160: #-- <q> tag (end tag required)
1.122     albertel 1161: sub start_q {
                   1162:     my ($target,$token) = @_;
                   1163:     my $currentstring = '';
1.325     albertel 1164:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1165: 	$currentstring .= $token->[4];
                   1166:     } elsif ($target eq 'tex') {
1.179     sakharuk 1167: 	$currentstring .= '\emph{';
1.122     albertel 1168:     }
                   1169:     return $currentstring;
                   1170: }
                   1171: 
                   1172: sub end_q {
                   1173:     my ($target,$token) = @_;
                   1174:     my $currentstring = '';
1.325     albertel 1175:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1176: 	$currentstring .= $token->[2];
                   1177:     } elsif ($target eq 'tex') {
1.179     sakharuk 1178: 	$currentstring .= '}';
1.144     sakharuk 1179:     } 
1.122     albertel 1180:     return $currentstring;
                   1181: }
                   1182: 
1.277     foxr     1183: #  <p> is a bit strange since it does not require a closing </p>
                   1184: #  However in latex, we must often output closing stuff to end
                   1185: #  environments and {}'s etc.  Therefore we do all the work
                   1186: #  of figuring out the ending strings in the start tag processing,
                   1187: #  and provide a mechanism to output the stop text external
                   1188: #  to tag processing.
                   1189: #
                   1190: {
                   1191: 
                   1192:     my $closing_string = '';		# String required to close <p>
                   1193: 
1.279     foxr     1194: #   Some tags are <p> fragile meaning that <p> inside of them
                   1195: #   does not work within TeX mode.  This is managed via the 
                   1196: #   counter below:
                   1197: #
                   1198: 
                   1199:     my $para_disabled = 0;
                   1200: 
                   1201: sub disable_para {
                   1202:     $para_disabled++;
                   1203: }
                   1204: sub enable_para {
                   1205:     $para_disabled--;
                   1206: }
                   1207: 
                   1208: 
1.181     sakharuk 1209: #-- <p> tag (end tag optional)
1.198     sakharuk 1210: #optional attribute - align="center|left|right"
1.122     albertel 1211: sub start_p {
1.157     sakharuk 1212:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1213:     my $currentstring = '';
1.325     albertel 1214:     if ($target eq 'web' || $target eq 'webgrade') {
1.279     foxr     1215: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.122     albertel 1216: 	$currentstring .= $token->[4];
1.279     foxr     1217: 	if (! ($currentstring =~ /\//)) {
                   1218: 	    $closing_string = '</p>'; # Deal correctly with <p /> e.g.
                   1219: 	}
                   1220:     } elsif ($target eq 'tex' && !$para_disabled) {
1.313     foxr     1221: 
1.279     foxr     1222: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.198     sakharuk 1223: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1224: 	if ($align eq 'center') {
1.333     albertel 1225: 	    $currentstring .='\begin{center}\par ';
1.277     foxr     1226: 	    $closing_string = '\end{center}';
1.309     albertel 1227: 	    if (&is_inside_of($tagstack, "table")) {
                   1228: 		$currentstring = &center_correction().$currentstring;
                   1229: 	    }
1.198     sakharuk 1230: 	} elsif ($align eq 'right') {
1.323     foxr     1231: 	    $currentstring.="\n".'{\flushright ';
                   1232: #	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
                   1233: 	    $closing_string= "}\n";
1.198     sakharuk 1234: 	} elsif ($align eq 'left') {
1.323     foxr     1235: 	    $currentstring.= "\n".'{\flushleft ';
                   1236: #	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
                   1237: 	    $closing_string = "}\n";
1.216     matthew  1238: 	} else {
1.277     foxr     1239:             $currentstring.='\par ';
1.313     foxr     1240: 	    if (&is_inside_of($tagstack, 'table')) {
1.315     foxr     1241: 		$closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1.313     foxr     1242: 	    } else {
                   1243: 		$closing_string = '\strut\\\\\strut ';
                   1244: 	    }
1.216     matthew  1245:         }
1.277     foxr     1246: 
1.144     sakharuk 1247:     }
1.122     albertel 1248:     return $currentstring;
                   1249: }
1.277     foxr     1250: #
                   1251: #  End paragraph processing just requires that we output the
                   1252: #  closing string that was saved and blank it.
                   1253: sub end_p {
1.279     foxr     1254:     #  Note only 'tex' mode uses disable_para and enable_para
                   1255:     #  so we don't need to know the target in the check below:
                   1256: 
                   1257:     if (!$para_disabled) {
                   1258: 	my $current_string = $closing_string;
                   1259: 	$closing_string = '';	# Not in a para anymore.
                   1260: 	return $current_string;
                   1261:     } else {
                   1262: 	return '';
                   1263:     }
1.122     albertel 1264: 
                   1265: }
1.277     foxr     1266: }
1.181     sakharuk 1267: #-- <br> tag (end tag forbidden)
1.122     albertel 1268: sub start_br {
                   1269:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1270:     my $currentstring = '';
1.325     albertel 1271:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1272: 	$currentstring .= $token->[4];
                   1273:     } elsif ($target eq 'tex') {
1.227     sakharuk 1274: 	my @tempo=@$tagstack;
1.229     sakharuk 1275: 	my $signal=0;
1.287     foxr     1276: 	#  Not going to factor this to is_inside_of since that would require
                   1277:         #  multiple stack traversals.
                   1278: 	#
1.227     sakharuk 1279: 	for (my $i=$#tempo;$i>=0;$i--) {
                   1280: 	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1.334     albertel 1281:                 ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul'))  {
1.229     sakharuk 1282: 		$signal=1;
1.334     albertel 1283: 	    }
                   1284: 	    if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1.336     foxr     1285: 		$signal = 1;
1.227     sakharuk 1286: 	    }
                   1287: 	}
1.375     foxr     1288: 	if ($signal != 1) {
1.219     sakharuk 1289: 	    $currentstring .= '\strut \\\\ \strut ';
1.1       sakharuk 1290: 	}
1.355     foxr     1291:     
1.144     sakharuk 1292:     }
1.122     albertel 1293:     return $currentstring;
                   1294: }
                   1295: 
                   1296: sub end_br {
                   1297:     my ($target,$token) = @_;
                   1298:     my $currentstring = '';
1.325     albertel 1299:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1300: 	$currentstring .= $token->[2];
                   1301:     }
                   1302:     return $currentstring;
                   1303: }
                   1304: 
1.181     sakharuk 1305: #-- <big> tag (end tag required)
1.122     albertel 1306: sub start_big {
                   1307:     my ($target,$token) = @_;
                   1308:     my $currentstring = '';
1.325     albertel 1309:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1310: 	$currentstring .= $token->[4];
                   1311:     } elsif ($target eq 'tex') {
1.137     sakharuk 1312: 	$currentstring .= '{\large ';
1.144     sakharuk 1313:     } 
1.122     albertel 1314:     return $currentstring;
                   1315: }
                   1316: 
                   1317: sub end_big {
                   1318:     my ($target,$token) = @_;
                   1319:     my $currentstring = '';
1.325     albertel 1320:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1321: 	$currentstring .= $token->[2];
                   1322:     } elsif ($target eq 'tex') {
                   1323: 	$currentstring .= '}';
                   1324:     }
                   1325:     return $currentstring;
                   1326: }
                   1327: 
1.181     sakharuk 1328: #-- <small> tag (end tag required)
1.122     albertel 1329: sub start_small {
                   1330:     my ($target,$token) = @_;
                   1331:     my $currentstring = '';
1.325     albertel 1332:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1333: 	$currentstring .= $token->[4];
                   1334:     } elsif ($target eq 'tex') {
                   1335: 	$currentstring .= '{\footnotesize ';
1.144     sakharuk 1336:     }
1.122     albertel 1337:     return $currentstring;
                   1338: }
                   1339: 
                   1340: sub end_small {
                   1341:     my ($target,$token) = @_;
                   1342:     my $currentstring = '';
1.325     albertel 1343:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1344: 	$currentstring .= $token->[2];
                   1345:     } elsif ($target eq 'tex') {
                   1346: 	$currentstring .= '}';
                   1347:     }
                   1348:     return $currentstring;
                   1349: }
                   1350: 
1.181     sakharuk 1351: #-- <basefont> tag (end tag forbidden)
1.122     albertel 1352: sub start_basefont {
1.126     sakharuk 1353:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.122     albertel 1354:     my $currentstring = '';
1.325     albertel 1355:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1356: 	$currentstring = $token->[4];     
1.126     sakharuk 1357:     } elsif ($target eq 'tex') {
                   1358: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1359: 	if (defined $basesize) {
                   1360: 	    $currentstring = '{\\'.$basesize.' ';
                   1361: 	}
                   1362:     }
1.122     albertel 1363:     return $currentstring;
                   1364: }
                   1365: 
                   1366: sub end_basefont {
1.126     sakharuk 1367:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1368:     my $currentstring = '';
1.325     albertel 1369:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1370: 	$currentstring = $token->[4];     
1.126     sakharuk 1371:     } elsif ($target eq 'tex') {
                   1372: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1373: 	if (defined $basesize) {
                   1374: 	    $currentstring = '}';
                   1375: 	}
                   1376:     }
1.122     albertel 1377:     return $currentstring;
                   1378: }
                   1379: 
1.181     sakharuk 1380: #-- <font> tag (end tag required)
1.122     albertel 1381: sub start_font {
                   1382:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1383:     my $currentstring = '';
1.325     albertel 1384:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1385: 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1.204     albertel 1386: 	if ($face!~/symbol/i) {
1.267     albertel 1387: 	    if (($env{'browser.fontenhance'} eq 'on') || 
                   1388: 		($env{'browser.blackwhite'} eq 'on')) { return ''; }
1.155     www      1389: 	}
1.122     albertel 1390: 	$currentstring = $token->[4];     
1.126     sakharuk 1391:     }  elsif ($target eq 'tex') {
                   1392: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1393: 	if (defined $fontsize) {
                   1394: 	    $currentstring = '{\\'.$fontsize.' ';
                   1395: 	}
                   1396:     }
1.122     albertel 1397:     return $currentstring;
                   1398: }
                   1399: 
                   1400: sub end_font {
                   1401:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1402:     my $currentstring = '';
1.325     albertel 1403:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1404: 	$currentstring = $token->[2];    
1.126     sakharuk 1405:     }  elsif ($target eq 'tex') {
                   1406: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1407: 	if (defined $fontsize) {
                   1408: 	    $currentstring = '}';
                   1409: 	}
                   1410:     }
1.122     albertel 1411:     return $currentstring;
                   1412: }
                   1413:  
1.181     sakharuk 1414: #-- <strike> tag (end tag required)
1.122     albertel 1415: sub start_strike {
                   1416:     my ($target,$token) = @_;
                   1417:     my $currentstring = '';
1.325     albertel 1418:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1419: 	$currentstring .= $token->[4];
                   1420:     } elsif ($target eq 'tex') {
                   1421: 	&Apache::lonxml::startredirection();
                   1422:     } 
                   1423:     return $currentstring;
                   1424: }
                   1425: 
                   1426: sub end_strike {
                   1427:     my ($target,$token) = @_;
                   1428:     my $currentstring = '';
1.325     albertel 1429:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1430: 	$currentstring .= $token->[2];
                   1431:     } elsif ($target eq 'tex') {
                   1432: 	$currentstring=&Apache::lonxml::endredirection();
                   1433: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 
                   1434: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/; 
                   1435: 	$currentstring=~s/(\S)\s*$/$1\}/;
                   1436:     }
                   1437:     return $currentstring;
                   1438: }
                   1439: 
1.181     sakharuk 1440: #-- <s> tag (end tag required)
1.122     albertel 1441: sub start_s {
                   1442:     my ($target,$token) = @_;
                   1443:     my $currentstring = '';
1.325     albertel 1444:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1445: 	$currentstring .= $token->[4];
                   1446:     } elsif ($target eq 'tex') {
                   1447: 	&Apache::lonxml::startredirection();
                   1448:     } 
                   1449:     return $currentstring;
                   1450: }
                   1451: 
                   1452: sub end_s {
                   1453:     my ($target,$token) = @_;
                   1454:     my $currentstring = '';
1.325     albertel 1455:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1456: 	$currentstring .= $token->[2];
                   1457:     } elsif ($target eq 'tex') {
                   1458: 	$currentstring=&Apache::lonxml::endredirection();
                   1459: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1460: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1461: 	$currentstring=~s/(\S)\s*$/$1\}/;	
                   1462:     }
                   1463:     return $currentstring;
                   1464: }
                   1465: 
1.181     sakharuk 1466: #-- <sub> tag (end tag required)
1.122     albertel 1467: sub start_sub {
                   1468:     my ($target,$token) = @_;
                   1469:     my $currentstring = '';
1.325     albertel 1470:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1471: 	$currentstring .= $token->[4];
                   1472:     } elsif ($target eq 'tex') {
1.355     foxr     1473: 	$currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1.122     albertel 1474:     } 
                   1475:     return $currentstring;
                   1476: }
                   1477: 
                   1478: sub end_sub {
                   1479:     my ($target,$token) = @_;
                   1480:     my $currentstring = '';
1.325     albertel 1481:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1482: 	$currentstring .= $token->[2];
                   1483:     } elsif ($target eq 'tex') {
1.202     sakharuk 1484: 	$currentstring .= '}}';
1.122     albertel 1485:     }
                   1486:     return $currentstring;
                   1487: }
                   1488: 
1.181     sakharuk 1489: #-- <sup> tag (end tag required)
1.122     albertel 1490: sub start_sup {
                   1491:     my ($target,$token) = @_;
                   1492:     my $currentstring = '';
1.325     albertel 1493:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1494: 	$currentstring .= $token->[4];
                   1495:     } elsif ($target eq 'tex') {
1.355     foxr     1496: 	$currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1.122     albertel 1497:     } 
                   1498:     return $currentstring;
                   1499: }
                   1500: 
                   1501: sub end_sup {
                   1502:     my ($target,$token) = @_;
                   1503:     my $currentstring = '';
1.325     albertel 1504:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1505: 	$currentstring .= $token->[2];
                   1506:     } elsif ($target eq 'tex') {
1.202     sakharuk 1507: 	$currentstring .= '}}';
1.122     albertel 1508:     }
                   1509:     return $currentstring;
                   1510: }
                   1511: 
1.181     sakharuk 1512: #-- <hr> tag (end tag forbidden)
1.122     albertel 1513: sub start_hr {
1.124     sakharuk 1514:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1515:     my $currentstring = &end_p();	# End enclosing para.
1.325     albertel 1516:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1517: 	$currentstring .= $token->[4];
                   1518:     } elsif ($target eq 'tex') {
1.361     foxr     1519: 
                   1520: 	# <hr /> can't be inside of <sup><sub> thank you LaTeX.
                   1521: 	# 
                   1522: 	my $restart_sub = 0;
                   1523: 	my $restart_sup = 0;
                   1524: 
                   1525: 	# Since <sub> and <sup> are simple tags it's ok to turn off/on
                   1526: 	# using the start_ stop_ functions.. those tags only care about
                   1527: 	# $target.
                   1528: 
                   1529: 	if (&is_inside_of($tagstack, "sub")) {
                   1530: 	    $restart_sub = 1;
                   1531: 	    $currentstring .= &end_sub($target, $token, $tagstack, 
                   1532: 				       $parstack, $parser, $safeeval);
                   1533: 	}
                   1534: 	if (&is_inside_of($tagstack, "sup")) {
                   1535: 	    $restart_sup = 1;
                   1536: 	    $currentstring .= &end_sup($target, $token, $tagstack,
                   1537: 				       $parstack, $parser, $safeeval);
                   1538: 	}	
                   1539: 
1.149     sakharuk 1540: 	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.124     sakharuk 1541: 	if (defined $LaTeXwidth) {
                   1542: 	    if ($LaTeXwidth=~/^%/) {
                   1543: 		substr($LaTeXwidth,0,1)='';
                   1544: 		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
                   1545: 	    }
                   1546: 	} else {
1.148     sakharuk 1547: 	    $LaTeXwidth ='0.9\textwidth';
1.124     sakharuk 1548: 	}
                   1549: 	my ($pre,$post);
                   1550: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1551: 	if (($align eq 'center') || (not defined $align)) {
                   1552: 	    $pre=''; $post='';
                   1553: 	} elsif ($align eq 'left') {
                   1554: 	    $pre='\rlap{'; $post='} \hfill';
                   1555: 	} elsif ($align eq 'right') {
                   1556: 	    $pre=' \hfill \llap{'; $post='}';
                   1557: 	}
1.148     sakharuk 1558: 	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1.124     sakharuk 1559:                                     $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1.361     foxr     1560: 	# Turn stuff back on that we can't be inside of.
                   1561: 
                   1562: 	if ($restart_sub) {
                   1563: 	    $currentstring .= &start_sub($target, $token, $tagstack,
                   1564: 					$parstack, $parser, $safeeval);
                   1565: 	}
                   1566: 	if ($restart_sup) {
                   1567: 	    $currentstring .= &start_sup($target, $token, $tagstack,
                   1568: 					 $parstack, $parser, $safeeval);
                   1569: 	}	
1.122     albertel 1570:     } 
                   1571:     return $currentstring;
                   1572: }
                   1573: 
                   1574: sub end_hr {
                   1575:     my ($target,$token) = @_;
                   1576:     my $currentstring = '';
1.325     albertel 1577:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1578: 	$currentstring .= $token->[2];
1.148     sakharuk 1579:     }
1.122     albertel 1580:     return $currentstring;
                   1581: }
                   1582: 
1.181     sakharuk 1583: #-- <div> tag (end tag required)
1.280     foxr     1584: {
                   1585: 
                   1586: #  Since div can be nested, the stack below is used
                   1587: #  in 'tex' mode to store the ending strings
                   1588: #  for the div stack.
                   1589: 
                   1590:     my @div_end_stack;
                   1591: 
1.122     albertel 1592: sub start_div {
1.280     foxr     1593:     my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1.279     foxr     1594:     my $currentstring = &end_p();	# Close enclosing para.
1.325     albertel 1595:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1596: 	$currentstring .= $token->[4];
                   1597:     } 
1.280     foxr     1598:     if ($target eq 'tex') {
                   1599: 	# 4 possible alignments: left, right, center, and -missing-.
1.380     foxr     1600:         # If inside a table row, we must let the table logic
                   1601: 	# do the alignment, however.
                   1602: 	# 
1.280     foxr     1603: 
                   1604: 	my $endstring = '';
                   1605: 
                   1606: 	my $align = lc(&Apache::lonxml::get_param('align', $parstack,
                   1607: 						  $safeeval, undef, 1));
                   1608: 	if ($align eq 'center') {
                   1609: 	    $currentstring .= '\begin{center}';
                   1610: 	    $endstring      = '\end{center}';
1.309     albertel 1611: 	    if (&is_inside_of($tagstack, "table")) {
                   1612: 		$currentstring = &center_correction().$currentstring;
1.380     foxr     1613: 		$endstring    .= &center_end_correction(); 
1.309     albertel 1614: 	    }
1.280     foxr     1615: 	}
                   1616: 	elsif ($align eq 'right') {
                   1617: 	    $currentstring .= '\begin{flushright}';
                   1618: 	    $endstring     .= '\end{flushright}';
                   1619: 	} elsif ($align eq 'left') {
                   1620: 	    $currentstring .= '\begin{flushleft}';
                   1621: 	    $endstring     = '\end{flushleft}';
                   1622: 	} else {
                   1623: 	
                   1624: 	}
                   1625: 	$currentstring .= "\n";   # For human readability.
                   1626: 	$endstring       = "\n$endstring\n"; # For human readability
                   1627: 	push(@div_end_stack, $endstring);
                   1628:     }
1.122     albertel 1629:     return $currentstring;
                   1630: }
                   1631: 
                   1632: sub end_div {
                   1633:     my ($target,$token) = @_;
                   1634:     my $currentstring = '';
1.325     albertel 1635:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1636: 	$currentstring .= $token->[2];
1.280     foxr     1637:     }
                   1638:     if ($target eq 'tex') {
                   1639: 	my $endstring = pop @div_end_stack;
                   1640: 	$currentstring .= $endstring;
                   1641:     }
1.122     albertel 1642:     return $currentstring;
                   1643: }
1.280     foxr     1644: }
1.122     albertel 1645: 
1.181     sakharuk 1646: #-- <a> tag (end tag required)
1.122     albertel 1647: sub start_a {
1.149     sakharuk 1648:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1649:     my $currentstring = '';
1.325     albertel 1650:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 1651: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   1652: 					    undef,1);
                   1653: 	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1.122     albertel 1654:     }
                   1655:     return $currentstring;
                   1656: }
                   1657: 
                   1658: sub end_a {
1.168     albertel 1659:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1660:     my $currentstring = '';
1.325     albertel 1661:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1662: 	$currentstring .= $token->[2];
                   1663:     }
1.351     foxr     1664:     if ($target eq 'tex') {
1.352     albertel 1665: 	my $href =
                   1666: 	    &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
                   1667: 	my $name =
                   1668: 	    &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1.382     www      1669:         my $uriprint =
                   1670:             &Apache::lonxml::get_param('uriprint',$parstack,$safeeval,undef,1);
                   1671:         my $anchorprint =
                   1672:             &Apache::lonxml::get_param('anchorprint',$parstack,$safeeval,undef,1);
                   1673: 	if (($href =~ /\S/) && ($uriprint=~/^on|uriprint|yes|1$/i)) {
1.352     albertel 1674: 	    $href =~ s/([^\\])%/$1\\\%/g;
1.365     foxr     1675: 	    # Substitute special symbols... and allow line breaks at each /
                   1676: 	    #
                   1677: 	    $href = &Apache::lonxml::latex_special_symbols($href);
                   1678: 	    $href =~ s/\//\/\\-/g;              # Map / to /\- to allow hyphenation.
                   1679: 	    $currentstring .= ' ({\tt URI:'.$href.'})';
1.382     www      1680: 	} elsif (($name =~ /\S/) && ($anchorprint=~/^on|anchorprint|yes|1$/i)) {
1.352     albertel 1681: 	    $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1.351     foxr     1682: 	} else {
                   1683: 	    $currentstring.='';
                   1684: 	}	
                   1685:     }
1.122     albertel 1686:     return $currentstring;
                   1687: }
                   1688: 
1.181     sakharuk 1689: #-- <li> tag (end tag optional)
1.122     albertel 1690: sub start_li {
1.168     albertel 1691:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1692:     my $currentstring = '';
1.325     albertel 1693:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1694: 	$currentstring = $token->[4];     
                   1695:     } elsif ($target eq 'tex') {
1.237     sakharuk 1696: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1697: 	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1.238     albertel 1698: 	#FIXME need to support types i and I 
                   1699: 	if ($type=~/disc/) {
                   1700: 	    $currentstring .= ' \item[$\bullet$] ';
                   1701: 	} elsif ($type=~/circle/) {
                   1702: 	    $currentstring .= ' \item[$\circ$] ';
1.146     sakharuk 1703: 	} elsif ($type=~/square/) {
1.238     albertel 1704: 	    $currentstring .= ' \item[$\diamond$] ';
                   1705: 	} elsif ($type eq '1') {
                   1706: 	    $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1.237     sakharuk 1707: 	} elsif ($type eq 'A') {
1.238     albertel 1708: 	    $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1709: 	} elsif ($type eq 'a') {
1.238     albertel 1710: 	    $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1711: 	} elsif ($value ne '') {
                   1712: 	    $currentstring .= ' \item['.$value.'] ';
1.122     albertel 1713: 	} else {
1.146     sakharuk 1714: 	    $currentstring .= ' \item ';
1.122     albertel 1715: 	}  
1.238     albertel 1716: 	$Apache::londefdef::list_index++;
                   1717:     }
1.122     albertel 1718:     return $currentstring;
                   1719: }
                   1720: 
                   1721: sub end_li {
                   1722:     my ($target,$token) = @_;
1.279     foxr     1723:     my $currentstring = &end_p();	# In case there's a <p> in the <li>
1.325     albertel 1724:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1725: 	$currentstring .= $token->[2];     
1.122     albertel 1726:     } 
                   1727:     return $currentstring;
                   1728: }
                   1729: 
1.181     sakharuk 1730: #-- <u> tag (end tag required)
1.122     albertel 1731: sub start_u {
                   1732:     my ($target,$token) = @_;
                   1733:     my $currentstring = '';
1.325     albertel 1734:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1735: 	$currentstring .= $token->[4];
                   1736:     } elsif ($target eq 'tex') {
                   1737: 	&Apache::lonxml::startredirection();
                   1738:     } 
                   1739:     return $currentstring;
                   1740: }
                   1741: 
                   1742: sub end_u {
                   1743:     my ($target,$token) = @_;
                   1744:     my $currentstring = '';
1.325     albertel 1745:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1746: 	$currentstring .= $token->[2];
                   1747:     } elsif ($target eq 'tex') {
                   1748: 	$currentstring=&Apache::lonxml::endredirection();
                   1749: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1750: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1751: 	$currentstring=~s/(\S)\s*$/$1\}/;		
                   1752:     }
                   1753:     return $currentstring;
                   1754: }
                   1755: 
1.181     sakharuk 1756: #-- <ul> tag (end tag required)
1.122     albertel 1757: sub start_ul {
1.125     sakharuk 1758:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1759:     my $currentstring = &end_p();	# Close off enclosing list.
1.325     albertel 1760:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1761: 	$currentstring .= $token->[4];     
1.122     albertel 1762:     } elsif ($target eq 'tex') {
1.125     sakharuk 1763: 	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1.238     albertel 1764: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1765: 	if ($TeXtype eq 'disc') {
1.222     sakharuk 1766: 	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                   1767:                               '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1768:                               '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1769:                               '\renewcommand{\labelitemiv}{$\bullet$}';
1.125     sakharuk 1770: 	} elsif ($TeXtype eq 'circle') {
1.222     sakharuk 1771: 	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                   1772:                               '\renewcommand{\labelitemii}{$\circ$}'. 
                   1773:                               '\renewcommand{\labelitemiii}{$\circ$}'.
                   1774:                               '\renewcommand{\labelitemiv}{$\circ$}';
1.125     sakharuk 1775: 	} elsif ($TeXtype eq 'square') {
1.222     sakharuk 1776: 	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                   1777:                               '\renewcommand{\labelitemii}{$\diamond$}'. 
                   1778:                               '\renewcommand{\labelitemiii}{$\diamond$}'.
                   1779:                               '\renewcommand{\labelitemiv}{$\diamond$}';
1.125     sakharuk 1780: 	}
1.222     sakharuk 1781: 	$currentstring .= '\strut \begin{itemize}';  
1.122     albertel 1782:     } 
                   1783:     return $currentstring;
                   1784: }
                   1785: 
                   1786: sub end_ul {
                   1787:     my ($target,$token) = @_;
                   1788:     my $currentstring = '';
1.325     albertel 1789:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1790: 	$currentstring = $token->[2];     
                   1791:     } elsif ($target eq 'tex') {
1.222     sakharuk 1792: 	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                   1793:                                '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1794:                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1795:                                '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
1.122     albertel 1796:     } 
                   1797:     return $currentstring;
                   1798: }
                   1799: 
1.181     sakharuk 1800: #-- <menu> tag (end tag required)
1.122     albertel 1801: sub start_menu {
                   1802:     my ($target,$token) = @_;
                   1803:     my $currentstring = '';
1.325     albertel 1804:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1805: 	$currentstring = $token->[4];     
                   1806:     } elsif ($target eq 'tex') {
                   1807: 	$currentstring = " \\begin{itemize} ";  
                   1808:     } 
                   1809:     return $currentstring;
                   1810: }
                   1811: 
                   1812: sub end_menu {
                   1813:     my ($target,$token) = @_;
                   1814:     my $currentstring = '';
1.325     albertel 1815:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1816: 	$currentstring = $token->[2];     
                   1817:     } elsif ($target eq 'tex') {
                   1818: 	$currentstring = " \\end{itemize}";  
                   1819:     } 
                   1820:     return $currentstring;
                   1821: }
                   1822: 
1.181     sakharuk 1823: #-- <dir> tag (end tag required)
1.122     albertel 1824: sub start_dir {
                   1825:     my ($target,$token) = @_;
1.279     foxr     1826:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.325     albertel 1827:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1828: 	$currentstring .= $token->[4];     
1.122     albertel 1829:     } elsif ($target eq 'tex') {
1.277     foxr     1830: 	$currentstring .= " \\begin{itemize} ";  
1.122     albertel 1831:     } 
                   1832:     return $currentstring;
                   1833: }
                   1834: 
                   1835: sub end_dir {
                   1836:     my ($target,$token) = @_;
                   1837:     my $currentstring = '';
1.325     albertel 1838:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1839: 	$currentstring = $token->[2];     
                   1840:     } elsif ($target eq 'tex') {
                   1841: 	$currentstring = " \\end{itemize}";  
                   1842:     } 
                   1843:     return $currentstring;
                   1844: }
                   1845: 
1.181     sakharuk 1846: #-- <ol> tag (end tag required)
1.122     albertel 1847: sub start_ol {
1.125     sakharuk 1848:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1849:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.325     albertel 1850:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1851: 	$currentstring .= $token->[4];     
1.122     albertel 1852:     } elsif ($target eq 'tex') {
1.238     albertel 1853: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1854: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1855: 	if ($type eq '1') {
1.222     sakharuk 1856: 	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1857:                               '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                   1858:                               '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1859:                               '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1.125     sakharuk 1860: 	} elsif ($type eq 'A') {
1.222     sakharuk 1861: 	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                   1862:                               '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                   1863:                               '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                   1864:                               '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1.125     sakharuk 1865: 	} elsif ($type eq 'a') {
1.222     sakharuk 1866: 	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                   1867:                               '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                   1868:                               '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                   1869:                               '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1.125     sakharuk 1870: 	} elsif ($type eq 'i') {
1.222     sakharuk 1871: 	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                   1872:                               '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                   1873:                               '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                   1874:                               '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1.125     sakharuk 1875: 	} elsif ($type eq 'I') {
1.222     sakharuk 1876: 	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                   1877:                               '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                   1878:                               '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                   1879:                               '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1.125     sakharuk 1880: 	}
1.222     sakharuk 1881: 	$currentstring .= '\strut \begin{enumerate}';  
1.122     albertel 1882:     } 
                   1883:     return $currentstring;
                   1884: }
                   1885: 
                   1886: sub end_ol {
                   1887:     my ($target,$token) = @_;
                   1888:     my $currentstring = '';
1.325     albertel 1889:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1890: 	$currentstring = $token->[2];     
                   1891:     } elsif ($target eq 'tex') {
1.222     sakharuk 1892: 	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1893:                                         '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                   1894:                                         '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1895:                                         '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
1.122     albertel 1896:     } 
                   1897:     return $currentstring;
                   1898: }
                   1899: 
1.181     sakharuk 1900: #-- <dl> tag (end tag required)
1.122     albertel 1901: sub start_dl {
                   1902:     my ($target,$token) = @_;
1.279     foxr     1903:     my $currentstring = &end_p();	# In case there's a <p> unclosed prior to the list.
1.325     albertel 1904:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1905: 	$currentstring .= $token->[4];     
1.122     albertel 1906:     } elsif ($target eq 'tex') {
1.277     foxr     1907: 	$currentstring .= '\begin{description}';
1.243     albertel 1908: 	$Apache::londefdef::DL++;
                   1909: 	push(@Apache::londefdef::description,[]);
                   1910: 	$Apache::londefdef::DD[$Apache::londefdef::DL]=0;
                   1911: 	$Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1.244     albertel 1912: 	$Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1.122     albertel 1913:     } 
                   1914:     return $currentstring;
                   1915: }
                   1916: 
                   1917: sub end_dl {
1.174     sakharuk 1918:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1919:     my $currentstring = '';
1.325     albertel 1920:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1921: 	$currentstring = $token->[2];     
                   1922:     } elsif ($target eq 'tex') {
1.243     albertel 1923: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1924: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
                   1925: 	foreach my $element (@{$Apache::londefdef::description[-1]}) {
1.174     sakharuk 1926: 	    $currentstring.=' '.$element.' ';
                   1927: 	}
1.243     albertel 1928: 	pop(@Apache::londefdef::description);
1.174     sakharuk 1929: 	$currentstring.='\end{description}';  
1.243     albertel 1930: 	delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
                   1931: 	delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1.244     albertel 1932: 	delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1.243     albertel 1933: 	$Apache::londefdef::DL--;
1.122     albertel 1934:     } 
                   1935:     return $currentstring;
                   1936: }
                   1937: 
1.172     sakharuk 1938: #-- <dt> tag (end tag optional)
1.122     albertel 1939: sub start_dt {
1.172     sakharuk 1940:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1941:     my $currentstring='';
1.325     albertel 1942:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1943: 	$currentstring = $token->[4];     
                   1944:     } elsif ($target eq 'tex') {
1.243     albertel 1945: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1946: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1.174     sakharuk 1947: 	&Apache::lonxml::startredirection();
1.243     albertel 1948: 	$Apache::londefdef::DT[-1]++;
1.244     albertel 1949: 	$Apache::londefdef::seenDT[-1]=1;
1.122     albertel 1950:     } 
                   1951:     return $currentstring;
                   1952: }
                   1953: 
                   1954: sub end_dt {
1.172     sakharuk 1955:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1956:     my $currentstring = '';
1.325     albertel 1957:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1958: 	$currentstring = $token->[2];    
                   1959:     } elsif ($target eq 'tex') {
1.243     albertel 1960: 	if ($Apache::londefdef::DT[-1]) {
                   1961: 	    my $data=&item_cleanup();
1.244     albertel 1962: 	    push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1.243     albertel 1963: 	    $Apache::londefdef::DT[-1]--;
                   1964: 	}
1.122     albertel 1965:     } 
                   1966:     return $currentstring;
                   1967: }
                   1968: 
1.173     sakharuk 1969: sub item_cleanup {
1.174     sakharuk 1970:     my $item=&Apache::lonxml::endredirection();
1.173     sakharuk 1971:     $item=~s/\\begin{center}//g;
                   1972:     $item=~s/\\end{center}//g;
                   1973:     return $item;
                   1974: }
                   1975: 
1.181     sakharuk 1976: #-- <dd> tag (end tag optional)
1.122     albertel 1977: sub start_dd {
1.147     sakharuk 1978:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1979:     my $currentstring = '';
1.325     albertel 1980:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1981: 	$currentstring = $token->[4];     
1.147     sakharuk 1982:     } elsif ($target eq 'tex') {
1.243     albertel 1983: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1984: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1.244     albertel 1985: 	if (!$Apache::londefdef::seenDT[-1]) {
                   1986: 	    push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
                   1987: 	}
1.243     albertel 1988: 	push(@{$Apache::londefdef::description[-1]},'');
                   1989: 	$Apache::londefdef::description[-1]->[-1].=' \strut ';
                   1990: 	$Apache::londefdef::DD[-1]++;
1.174     sakharuk 1991: 	&Apache::lonxml::startredirection();
1.122     albertel 1992:     } 
                   1993:     return $currentstring;
                   1994: }
                   1995: 
                   1996: sub end_dd {
1.174     sakharuk 1997:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1998:     my $currentstring = '';
1.325     albertel 1999:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2000: 	$currentstring = $token->[2];    
1.174     sakharuk 2001:     }  elsif ($target eq 'tex') {
1.243     albertel 2002: 	$Apache::londefdef::description[-1]->[-1].=
                   2003: 	    &Apache::lonxml::endredirection().' \vskip 0mm ';
                   2004: 	$Apache::londefdef::DD[-1]--;
1.174     sakharuk 2005:     }
1.122     albertel 2006:     return $currentstring;
                   2007: }
                   2008: 
1.181     sakharuk 2009: #-- <table> tag (end tag required)
1.277     foxr     2010: #       <table> also ends any prior <p> that is not closed.
                   2011: #               but, unless I allow <p>'s to nest, that's the
                   2012: #               only way I could think of to allow <p> in 
                   2013: #               <tr> <th> bodies
                   2014: #
1.398   ! foxr     2015: #list of supported attributes: border,width,TeXwidth,TeXtheme
        !          2016: #                              align
1.91      sakharuk 2017: sub start_table {
                   2018:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.277     foxr     2019:     my $textwidth = '';
1.279     foxr     2020:     my $currentstring = &end_p();
1.325     albertel 2021:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2022: 	$currentstring .= $token->[4];     
1.91      sakharuk 2023:     } elsif ($target eq 'tex') {
1.396     foxr     2024: 	&disable_para();	# Can't have paras in a table.
1.398   ! foxr     2025: 
        !          2026: 
        !          2027: 	#  New table code:
        !          2028: 
        !          2029: 	#  Get the parameters that we can do something about:
        !          2030: 
        !          2031: 	my $border = &Apache::lonxml::get_param('border', $parstack, $safeeval, undef, 0);
        !          2032: 	my $width  = &Apache::lonxml::get_param('TeXwidth', $parstack, $safeeval, undef, 0);
        !          2033: 	my $theme  = &Apache::lonxml::get_param('TeXtheme', $parstack, $safeeval, undef, 0);
        !          2034: 	my $align  = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 0);
        !          2035: 
        !          2036: 	# The only thing that needs any figuring out is the width.. and then only if it is
        !          2037: 	# a percent. If not it's assumed to be some valid TeX measurement unit e.g. 3.0cm
        !          2038: 	#
        !          2039: 
        !          2040: 	my $table = new Apache::lontable();
        !          2041: 	if ($border ne '') {
        !          2042: 	    $table->table_border(1);
        !          2043: 	    $table->cell_border(1);
        !          2044: 	}
        !          2045: 	if ($theme ne '') {
        !          2046: 	    $table->theme($theme);
        !          2047: 	}
        !          2048: 	if ($align ne '') {
        !          2049: 	    $table->alignment($align);
        !          2050: 	}
        !          2051: 
        !          2052: 	# Missing width is most of page width
        !          2053: 
        !          2054: 	if ($width eq "") {
        !          2055: 	    $width = '70%';
        !          2056: 	}
        !          2057: 	
        !          2058: 	# If a percentage, need to calculate what this means in terms of
        !          2059: 	# page width:
        !          2060: 	
        !          2061: 	if ($width =~ /%$/) {
        !          2062: 	    my $textwidth = &recalc($env{'form.textwidth'});  # Page width in mm.
        !          2063: 	    $width =~ s/%//;
        !          2064: 	    $width = $width * $textwidth / 100.0;
        !          2065: 	    $width .= " mm";
        !          2066: 	    $table->width($width);
        !          2067: 	}
        !          2068: 
        !          2069: 	push(@Apache::londefdef::table, $table);
        !          2070:         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
        !          2071: 
        !          2072: 	#--------------------------------------------------------
        !          2073: 	#  Old table code here.
        !          2074: 	#--------------------------------------------------------
        !          2075: 
        !          2076: 
        !          2077: 	if (0) {
1.344     albertel 2078: 	push(@Apache::londefdef::table, {}); 
1.91      sakharuk 2079: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 2080:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 2081: 	if ($#Apache::londefdef::table==0) {
1.267     albertel 2082: 	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1.206     sakharuk 2083: 	    $textwidth=~/(\d+\.?\d*)/;
1.358     foxr     2084: 	    $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
1.206     sakharuk 2085: 	} else {
                   2086: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   2087: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   2088: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   2089: 	    } else {
                   2090:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 2091: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 2092: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   2093: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   2094: 		}
                   2095: 	    }
                   2096: 	}
1.294     foxr     2097: 
                   2098: 	# width either comes forced from the TeXwidth or the width parameters.
                   2099: 	# in either case it can be a percentage or absolute width.
1.311     albertel 2100: 	# in the width case we ignore absolute width 
1.126     sakharuk 2101: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.308     albertel 2102: 	if (!defined($TeXwidth)) {
1.311     albertel 2103: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
                   2104: 						       $safeeval,undef,1);
                   2105: 	    if ($htmlwidth =~ /%/) {
                   2106: 		$TeXwidth = $htmlwidth;
                   2107: 	    } else { 
                   2108: 		$TeXwidth = $textwidth;
                   2109: 	    }
1.364     foxr     2110: 	}
                   2111: 	# if the width is specified as a % it is converted to an absolute width.
                   2112: 	# otherwise.. just plugged right in the hash
                   2113: 
1.294     foxr     2114: 	if ($TeXwidth=~/%/) {
1.126     sakharuk 2115: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 2116:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 2117: 	} else {
1.206     sakharuk 2118: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.316     foxr     2119: 	}
                   2120:         #  In the end, however the table width cannot be wider than $textwidth...
                   2121: 	
                   2122: 	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
                   2123: 	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
                   2124: 	}
1.126     sakharuk 2125:         #table's border
1.206     sakharuk 2126: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 2127:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 2128: 	unless (defined $border) { $border = 0; }
                   2129: 	if ($border) { 
                   2130: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   2131: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2132: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   2133: 	} else {
                   2134: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   2135: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2136: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   2137: 	}
1.206     sakharuk 2138: 	if ($#Apache::londefdef::table==0) {
1.281     foxr     2139: 	    #    Note that \newline seems to destroy the alignment envs.
                   2140: 	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
                   2141: 	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 2142: 	}
                   2143: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   2144:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   2145:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 2146:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 2147:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   2148:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   2149:         $Apache::londefdef::table[-1]{'content'}=[];
                   2150:         $Apache::londefdef::table[-1]{'align'}=[];
1.340     foxr     2151:         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
1.398   ! foxr     2152:     }
1.294     foxr     2153: 
                   2154:     }
1.91      sakharuk 2155:     return $currentstring;
                   2156: }
1.122     albertel 2157:  
                   2158: sub end_table {
                   2159:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2160:     my $currentstring = '';
1.325     albertel 2161:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2162: 	$currentstring = $token->[2];     
                   2163:     } elsif ($target eq 'tex') {
1.398   ! foxr     2164: 
        !          2165: 
        !          2166: 	#  New table code:
        !          2167: 
        !          2168: 	my $table = pop(@Apache::londefdef::table);
        !          2169: 	my $t     = $table->generate();
        !          2170: 	$currentstring = $t->generate_string();
        !          2171: 	&enable_para();
        !          2172: 	#--------------------------------------------------------------
        !          2173: 	#  Old table code:
        !          2174: 	#--------------------------------------------------------------
        !          2175: 
        !          2176: 	if (0) {
        !          2177: 
1.372     foxr     2178: 	my $border =  &Apache::lonxml::get_param('border',$parstack,$safeeval);
1.122     albertel 2179: 	my $inmemory = '';
                   2180: 	my $output = '';
1.206     sakharuk 2181: 	my $WARNING='';
                   2182:         #width of columns from TeXwidth attributes
1.294     foxr     2183: 
1.384     foxr     2184: 	# Protect against unbalanced </table> tag.
                   2185: 
                   2186: 	if (scalar(@Apache::londefdef::table) > 0) {
                   2187: 
1.206     sakharuk 2188: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2189: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2190: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   2191: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   2192: 		}	
                   2193: 	    }
                   2194: 	}
                   2195:         #free space and number of empty columns
                   2196: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 2197: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 2198: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2199: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   2200: 		$empty_columns++;
                   2201: 	    } else {
                   2202: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   2203: 	    }
                   2204: 	}
1.358     foxr     2205: 
1.206     sakharuk 2206:         #boundaries for contents columns
                   2207: 	my @min_len=();#columns can not be narrower 
                   2208: 	my @max_len=();#maximum length of column
1.357     foxr     2209: 	my $avg_max;
                   2210: 	my $avg_min;
                   2211: 	my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
                   2212: 	for (my $jn=0;$jn<=$counter_cols; $jn++) {
1.206     sakharuk 2213: 		my ($localmin,$localmax)=(0,0);
                   2214: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2215: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   2216: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   2217: 		    }
                   2218: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   2219: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   2220: 		    }
                   2221: 		}
                   2222: 		push @min_len, $localmin;
                   2223: 		push @max_len, $localmax;
1.357     foxr     2224: 		$avg_max = $localmax + $avg_max;
                   2225: 		$avg_min = $localmin + $avg_min;
                   2226: 	}
                   2227: 	# Does not really matter what the average max/min are if there are no cols.
                   2228: 	# and this prevents div 0 in that case.
                   2229: 
                   2230: 	if ($counter_cols != 0) {
                   2231: 	    $avg_max = $avg_max/$counter_cols;
                   2232: 	    $avg_min = $avg_min/$counter_cols;
                   2233: 	}
                   2234: 
                   2235: 
                   2236: 	#  I don't think the below is needed.. but just in case:
                   2237: 
                   2238: 	if ($avg_min > $avg_max) {
                   2239: 	    my $temp = $avg_min;
                   2240: 	    $avg_min = $avg_max;
                   2241: 	    $avg_max = $temp;
1.122     albertel 2242: 	}
1.357     foxr     2243: 
                   2244: 
                   2245: 	for (my $jn=0;$jn<=$counter_cols;$jn++) {
1.206     sakharuk 2246: 	    my $localmin=0,;
                   2247: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2248: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   2249: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   2250: 		}
                   2251: 	    }
1.229     sakharuk 2252: 	    if ($max_len[$jn]<$localmin) {
                   2253: 		$max_len[$jn]=$localmin;
                   2254: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2255: 	    }#object size is bigger
                   2256: 	    if ($min_len[$jn]<$localmin) {
                   2257: 		$min_len[$jn]=$localmin;
                   2258: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2259: 	    }#object size is bigger
1.206     sakharuk 2260: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   2261: 		$min_len[$jn]=0;
                   2262: 		$max_len[$jn]=0;
                   2263: 	    }
1.357     foxr     2264: 	    #  Spans seem to be really bothered by max/min = 0.  So if we have one
                   2265: 	    #  make it an average joe max/min.
                   2266: 	    
                   2267: 	    if ($max_len[$jn] == 0) {
                   2268: 		$max_len[$jn] = $avg_max;
                   2269: 	    }
                   2270: 	    if ($min_len[$jn] == 0) {
                   2271: 		$min_len[$jn] = $avg_min;
                   2272: 	    }
                   2273: 
1.206     sakharuk 2274: 	}
                   2275:        #final adjustment of column width
                   2276: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   2277: 	my @adjust=();
                   2278:         #step 1. adjustment by maximum value
1.370     albertel 2279: 	my $space_needed=0;
1.206     sakharuk 2280: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
1.370     albertel 2281: 	    $space_needed=$space_needed+$max_len[$jn];
1.206     sakharuk 2282: 	}
1.370     albertel 2283: 	if ($space_needed<=$available_space) {
1.362     foxr     2284: 
1.206     sakharuk 2285: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2286: 		if ($fwidth[$jn]==0) {
                   2287: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 2288: 		}
1.51      sakharuk 2289: 	    }
1.206     sakharuk 2290: 	} else {
                   2291:         #step 2. adjustment by minimum value (estimation)
1.370     albertel 2292: 	    $space_needed=0;
1.206     sakharuk 2293: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
1.370     albertel 2294: 		$space_needed+=$min_len[$jn];
1.206     sakharuk 2295: 	    }
1.370     albertel 2296: 	    if ($space_needed>$available_space) {
1.206     sakharuk 2297: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   2298: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2299: 		    if ($fwidth[$jn]==0) {
                   2300: 			$fwidth[$jn]=$min_len[$jn];
                   2301: 		    }
                   2302: 		}
1.229     sakharuk 2303: 		#check if we have objects which can be scaled
                   2304: 		my $how_many_to_scale=0;
                   2305: 		my @to_scale=();
                   2306: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2307: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   2308: 			$how_many_to_scale++;
                   2309: 			push @to_scale, $jn;
                   2310: 		    }
                   2311: 		}
                   2312: 		if ($how_many_to_scale>0) {
1.370     albertel 2313: 		    my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
1.229     sakharuk 2314: 		    foreach my $jn (@to_scale) {
                   2315: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2316: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   2317: 			    if ($1 ne '') {
                   2318: 				my $current_length=&recalc($1);
                   2319: 				$current_length=~/(\d+\.?\d*)/;
                   2320: 				$current_length=$current_length-$space_to_adjust;
                   2321: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   2322: 			    }
                   2323: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   2324: 			    if ($1 ne '') {
                   2325: 				my $current_length=$1;
                   2326: 				$current_length=$current_length-$space_to_adjust;
                   2327: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   2328: 			    }				
                   2329: 			}
                   2330: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   2331: 		    }
                   2332: 		}
1.206     sakharuk 2333: 	    } else {
                   2334: 	      #step 3. adjustment over minimal + corrections
1.370     albertel 2335: 		my $enlarge_coef=$available_space/$space_needed;
1.206     sakharuk 2336: 		my $acsessive=0;
                   2337: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2338: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2339: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2340: 			$fwidth[$jn]=$max_len[$jn];
                   2341: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2342: 			$adjust[$jn]=0;
1.357     foxr     2343: 
1.206     sakharuk 2344: 		    }
                   2345: 		}
                   2346: 		if ($acsessive>0) {
                   2347: 		#we have an excess of space and can redistribute it
                   2348: 		    my $notempty_columns=0;
                   2349: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2350: 			if ($adjust[$jn]!=0) {
                   2351: 			    $notempty_columns++;
                   2352: 			}
                   2353: 		    }
                   2354: 		    my $per_column=$acsessive/$notempty_columns;
                   2355: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2356: 			if ($adjust[$jn]!=0) {
                   2357: 			    $adjust[$jn]+=$per_column;
                   2358: 			    $fwidth[$jn]=$adjust[$jn];
                   2359: 			}
1.223     sakharuk 2360: 		    }
                   2361: 		} else {
                   2362: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2363: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2364: 		    }
                   2365: 		}
1.203     sakharuk 2366: 	    }
                   2367: 	}
1.364     foxr     2368:         # use all available width or specified width as if not specified,
                   2369: 	# the specified width gets defaulted to the available width.
                   2370: 
                   2371: 	my $current=0; 
                   2372: 	for (my $i=0;$i<=$#fwidth;$i++) {  
                   2373: 	    $current+=$fwidth[$i];
                   2374: 	}
1.371     albertel 2375: 	if ($current == 0) {
                   2376:             $current = $Apache::londefdef::table[-1]{'width'};
                   2377:         }
1.364     foxr     2378: 	my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
                   2379: 	for (my $i=0;$i<=$#fwidth;$i++) {  
                   2380: 	    $fwidth[$i]*=$coef;
1.206     sakharuk 2381: 	}
                   2382:         #removing of empty columns if allowed
1.208     sakharuk 2383:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2384: 	if ($permission eq 'yes') {
                   2385: 	    my @cleaned_table=();
                   2386:             my @cleaned_header=();
                   2387: 	    my $colind=0;
                   2388: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2389: 		if ($fwidth[$jn]!=0) {
                   2390: 		    #we need to copy column
                   2391: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2392: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2393: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2394: 		    }
                   2395: 		    $colind++;
                   2396: 		}
1.122     albertel 2397: 	    }
1.206     sakharuk 2398: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2399: 	    @fwidth=@cleaned_header;
1.122     albertel 2400: 	}
1.359     foxr     2401: 
1.358     foxr     2402: 
1.206     sakharuk 2403: 	#construct header of the table
                   2404: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2405: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2406: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2407: 	}
                   2408: 	$header_of_table .= '}';
1.357     foxr     2409: 
1.126     sakharuk 2410: 	#fill the table
                   2411: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.306     foxr     2412: 	    my $have_rowspan = 0;
1.206     sakharuk 2413: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
1.320     foxr     2414: 
                   2415: 		#-----------------------------------------------------------
                   2416:                 #   I think this order of doing things will ensure that
                   2417: 		#   single rowspan, columspan and combined row/colspans will
                   2418:                 #   work correctly.  LaTeX is delicate here.
                   2419: 		#    RF.
1.356     foxr     2420: 		
1.320     foxr     2421: 		# Start a rowspan if necessary:
1.356     foxr     2422: 		
                   2423: 		my $primary_col_width = $fwidth[$jn]; # Width of primary column.
1.320     foxr     2424: 		my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
                   2425: 		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
1.304     foxr     2426: 		#
                   2427: 		#  Do the appropriate magic if this has a colspan
                   2428: 		# 
1.356     foxr     2429: 		
1.372     foxr     2430: 		my $border_char = "";
                   2431: 		if ($border) {
                   2432: 		    $border_char = "|";
                   2433: 		}
1.356     foxr     2434: 		my $spanwidth = 0;
1.304     foxr     2435: 		if ($colspan > 1) {
1.336     foxr     2436: 		    for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
                   2437: 			$spanwidth += $fwidth[$spancol];
                   2438: 		    }
1.304     foxr     2439: 		    $output .= '\multicolumn{'.
                   2440: 			$colspan
1.337     foxr     2441: 			."}";
                   2442: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2443: 			$output .= '{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2444: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2445: 			$output .= '{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2446: 		    }
                   2447: 		    else {
1.372     foxr     2448: 			$output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
1.337     foxr     2449: 		    }
1.356     foxr     2450: 		    
                   2451: 		} else {
                   2452: 		    $spanwidth = $primary_col_width; # If no span width will be just colwidth
1.304     foxr     2453: 		}
1.306     foxr     2454: 
1.337     foxr     2455: 		# Rowspan... if colspan is 1, and there's an alignment we'll need
                   2456: 		# to kick in a multicolumn in order to get the alignment spec.
                   2457: 		# this must precede the multirow or LaTex gets quite upset.
                   2458: 		# Naturally if colspan > 1 we've already done that above ^
                   2459: 		#
                   2460: 		my $multirow_aligned = 0;
1.306     foxr     2461: 		if ($rowspan > 1) {
1.337     foxr     2462: 		    if ($colspan == 1) {
                   2463: 			if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2464: 			    $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2465: 			    $multirow_aligned = 1;
                   2466: 			} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2467: 			    $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2468: 			    $multirow_aligned = 1;
                   2469: 			}
                   2470: 		    }
1.306     foxr     2471: 		    $have_rowspan++;
1.356     foxr     2472: 		    if ($multirow_aligned) {
                   2473: 			$output .= '\multirow{'.$rowspan.'}[0]{*}{';
                   2474: 		    } else {
                   2475: 			$output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
                   2476: 		    }
1.350     albertel 2477: 		    
                   2478: 		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
                   2479: 			s{^\s*\\par\s*}{};
                   2480: 		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
                   2481: 			s{\s*\\vskip\s*0pt\s*$}{};
1.356     foxr     2482: 			  
1.337     foxr     2483: 		    #
                   2484: 		    # If we did not throw in a multicolumn to align, then add 
                   2485: 		    # an extra {
                   2486: 		    # so we close correctly without having to keep additional state
                   2487: 		    # around
                   2488: 		    #
                   2489: 		    if (!$multirow_aligned) {
                   2490: 			$output .= '{';
                   2491: 		    }
1.306     foxr     2492: 		}
                   2493: 		if (($rowspan eq '^') || ($rowspan eq '_')) {
                   2494: 		    $have_rowspan++;
                   2495: 		}
1.356     foxr     2496: 		    #--------------------------------------------------------------
1.306     foxr     2497: 
1.337     foxr     2498: 
                   2499: 		# For right and center alignment of single cells.
                   2500: 		# we are going to use a multicolumn with a span of 1 to specify alignment.
                   2501: 		#
                   2502: 		if ($colspan == 1  && $rowspan == 1) {
                   2503: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2504: 			$output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2505: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2506: 			$output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2507: 		    }
1.206     sakharuk 2508: 		}
1.337     foxr     2509: 
1.206     sakharuk 2510: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
1.337     foxr     2511: 
                   2512: 		if (($colspan == 1 && $rowspan == 1)   &&
                   2513: 		    (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
                   2514: 		     ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
                   2515: 		    $output .= '}';
1.206     sakharuk 2516: 		}
1.337     foxr     2517: 
1.306     foxr     2518: 		# Close off any open multirow:
                   2519: 		
                   2520: 		if ($rowspan > 1) {
1.337     foxr     2521: 		    $output .= '}}';
1.306     foxr     2522: 		}
1.304     foxr     2523: 		#  Close off the colspan...
                   2524: 		#
                   2525: 		if ($colspan > 1)  {
                   2526: 		    $output .= '}';
                   2527: 		    $jn += $colspan-1; # Adjust for number of rows really left.
                   2528: 		}
1.206     sakharuk 2529:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2530: 	    }
1.306     foxr     2531: 	    #  If have_rowspan > 0, and borders are on, then 
                   2532: 	    #  we need to do more than put an \hline at the bottom of row.
                   2533: 	    #  we need to do the appropriate \cline to ensure that
                   2534: 	    #  the spanned rows don't have \hlines through them.
                   2535: 
                   2536: 	    if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
                   2537: 		$output .= ' \\\\ ';
                   2538: 		for (my $jn=0; $jn<=$#fwidth;$jn++) {
                   2539: 		    my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
1.320     foxr     2540: 		    if ($rowspan ne "^") {
                   2541: 			if (($rowspan <= 1) || ($rowspan eq '_')) {
                   2542: 			    my $column = $jn+1;
                   2543: 			    $output .= '\cline{'.$column.'-'.$column.'} ';
                   2544: 			}
1.306     foxr     2545: 		    }
                   2546: 		}
                   2547: 
                   2548: 	    } else {
                   2549: 		$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
                   2550: 	    }
1.122     albertel 2551: 	}
1.281     foxr     2552: 	# Note that \newline destroys alignment env's produced  by e.g. <div>
                   2553: 	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
                   2554: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
1.127     sakharuk 2555: 	if ($#Apache::londefdef::table > 0) {	    
                   2556: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
1.294     foxr     2557: 	    # Figure out max/and min width  by summing us and then
                   2558: 	    # apply that to the current column of the table we nest in
                   2559: 	    # if it's larger than the current width or the current width
                   2560: 	    # is undefined.
                   2561: 	    #
                   2562: 	    my $min_nested_width = 0;
                   2563: 	    my $max_nested_width = 0;
                   2564: 	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
                   2565: 		$min_nested_width +=  $min_len[$col];
                   2566: 		$max_nested_width +=  $max_len[$col];
1.300     foxr     2567: 		
1.294     foxr     2568: 	    }
                   2569: 	    # Fudge in an extra 5 mm for borders etc:
                   2570: 	    
                   2571: 	    $min_nested_width += 5;
                   2572: 	    $max_nested_width += 5;
                   2573: 
                   2574: 	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
                   2575: 	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
                   2576: 	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
                   2577: 		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
                   2578: 	    }
                   2579: 	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
                   2580: 		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
                   2581: 	    }
                   2582: 
1.127     sakharuk 2583: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2584: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2585: 	} else {
                   2586: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2587: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2588: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2589: 	}
1.396     foxr     2590: 	}
                   2591: 	&enable_para();
1.384     foxr     2592:     }
1.398   ! foxr     2593:     }
1.122     albertel 2594:     return $currentstring;
                   2595: }
                   2596: 
1.166     sakharuk 2597: #-- <tr> tag (end tag optional)
1.122     albertel 2598: sub start_tr {
                   2599:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2600:     my $currentstring = '';
1.325     albertel 2601:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2602: 	$currentstring = $token->[4];     
                   2603:     } elsif ($target eq 'tex') {
1.398   ! foxr     2604: 
        !          2605: 	my $align = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 1);
        !          2606: 	$Apache::londefdef::table[-1]->start_row();
        !          2607: 	
        !          2608: 	if ($align ne '') {
        !          2609: 	    $Apache::londefdef::table[-1]->configure_row({default_halign => $align});
        !          2610: 	}
        !          2611: 
        !          2612: 	#---------------------------------------------------------------
        !          2613: 	# Old table code.
        !          2614: 	#---------------------------------------------------------------
        !          2615: 
        !          2616: 	if (0) {
1.122     albertel 2617: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2618: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2619: 	if ($alignchar ne '') {
1.206     sakharuk 2620: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2621: 	} else {
                   2622: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2623: 	}
                   2624: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
1.300     foxr     2625: 	#
                   2626: 	#  Need to save the number of table columns to preserve the max # columns.
                   2627: 	#
                   2628: 	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
1.122     albertel 2629: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2630: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2631: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2632: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2633: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2634: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.398   ! foxr     2635:     }
1.122     albertel 2636:     } 
                   2637:     return $currentstring;
                   2638: }
                   2639:         
                   2640: sub end_tr {
1.160     sakharuk 2641:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2642:     my $currentstring = &end_p();	# Close any pending <p> in the row.
1.325     albertel 2643:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2644: 	$currentstring .= $token->[2];     
1.122     albertel 2645:     } elsif ($target eq 'tex') {
1.398   ! foxr     2646: 
        !          2647: 	# In case the user is missing a </td> or </th> tag:
        !          2648: 
        !          2649: 	if ($Apache::londefdef::TD_redirection) {
        !          2650: 	    &end_td_tex($parstack,$parser,$safeeval);    
        !          2651: 	}
        !          2652: 	$Apache::londefdef::table[-1]->end_row();
        !          2653: 
        !          2654: 	#-----------------------------------------------
        !          2655: 	# Old table code
        !          2656: 	#-----------------------------------------------
        !          2657: 
        !          2658: 	if (0) {
1.160     sakharuk 2659: 	if ($Apache::londefdef::TD_redirection) {
                   2660: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2661: 	}
1.300     foxr     2662: 	# Counter columns must be the maximum number of columns seen
                   2663: 	# in the table so far so:
                   2664: 	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
                   2665: 	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
                   2666: 	}
1.398   ! foxr     2667:     }
1.295     foxr     2668: 
1.294     foxr     2669: 	
1.122     albertel 2670:     }
                   2671:     return $currentstring;
                   2672: }
                   2673: 
1.166     sakharuk 2674: #-- <td> tag (end tag optional)
1.122     albertel 2675: sub start_td {
                   2676:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2677:     my $currentstring = '';
1.325     albertel 2678:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2679: 	$currentstring = $token->[4];     
                   2680:     } elsif ($target eq 'tex') {
1.160     sakharuk 2681: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2682: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2683:     } 
                   2684:     return $currentstring;
                   2685: }   
1.159     sakharuk 2686:     
                   2687: sub tag_check {
                   2688:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2689:     my @ar=@$parstack; 
                   2690:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2691: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2692: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2693: 	    last;
                   2694: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2695: 	    splice @ar, $i+1;
                   2696: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2697: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2698: 	    last;
1.159     sakharuk 2699: 	}
1.160     sakharuk 2700:     }
1.159     sakharuk 2701:     return '';
                   2702: }
1.398   ! foxr     2703: 
        !          2704: #
        !          2705: #  Factor out cell configuration hash generation:
        !          2706: #
        !          2707: 
        !          2708: sub cell_config_hash {
        !          2709:     my ($align, $rowspan, $colspan) = @_;
        !          2710:     my %config;
        !          2711:     if ($align ne '') {
        !          2712: 	$config{'halign'} = $align;
        !          2713:     }
        !          2714:     if ($colspan ne "") {
        !          2715: 	$config{'colspan'} = $colspan;
        !          2716:     }
        !          2717:     if ($rowspan ne '') {
        !          2718: 	$config{'rowspan'} = $rowspan;
        !          2719:     }
        !          2720:     return \%config;
        !          2721: }
1.159     sakharuk 2722:  
                   2723: sub start_td_tex {
                   2724:     my ($parstack,$parser,$safeeval) = @_;
1.398   ! foxr     2725: 
        !          2726:     # At this stage, an empty cell is created with the
        !          2727:     # appropriate rowspan/colspan and alignment
        !          2728:     # attributes, but empty of text.  end_td_tex will
        !          2729:     # fetch the contents from the recursive parse and
        !          2730:     # fill the cell with them:
        !          2731:     my $align   = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 1);
        !          2732:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 1);
        !          2733:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 1);
        !          2734: 
        !          2735:     my $config = &cell_config_hash($align, $rowspan, $colspan);
        !          2736: 
        !          2737:     my $table = $Apache::londefdef::table[-1];
        !          2738:     $table->add_cell('', $config);
        !          2739:     
        !          2740: 
        !          2741:     #------------------------------------------------
        !          2742:     #  Old table code.
        !          2743:     #------------------------------------------------
        !          2744: 
        !          2745:     if (0) {
        !          2746: 
1.206     sakharuk 2747:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2748:     if ($alignchar eq '') {
                   2749: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2750:     }
1.206     sakharuk 2751:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2752:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2753:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2754:     if (defined $TeXwidth) {		
                   2755: 	my $current_length=&recalc($TeXwidth);
                   2756: 	$current_length=~/(\d+\.?\d*)/;
                   2757: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2758:     }
1.398   ! foxr     2759:     }
1.159     sakharuk 2760:     &Apache::lonxml::startredirection();
                   2761:     return '';
                   2762: }
                   2763: 
                   2764: sub end_td_tex {
1.398   ! foxr     2765: 
        !          2766:     my $text = &Apache::lonxml::endredirection();
        !          2767:     my $table = $Apache::londefdef::table[-1];
        !          2768:     $table->append_cell_text($text);
        !          2769: 
        !          2770:     #-------------------------------------------------
        !          2771:     # Old table code
        !          2772:     #-------------------------------------------------
        !          2773: 
        !          2774:     if (0) {
1.159     sakharuk 2775:     my ($parstack,$parser,$safeeval) = @_;
1.304     foxr     2776:     my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
                   2777:     my $current_column = $Apache::londefdef::table[-1]{'counter_columns'}; 
1.303     foxr     2778:     my $data = &Apache::lonxml::endredirection();
                   2779: 
1.305     foxr     2780:     #  The rowspan array of the table indicates which cells are part of a span.
                   2781:     #  n indicates the start of a span set of n rows.
                   2782:     #  ^ indicates a cell that continues a span set.
1.306     foxr     2783:     #  _ indicates the cell is at the bottom of a span set.
1.305     foxr     2784:     #  If this and subsequent cells are part of a rowspan, we must
                   2785:     #  push along the row until we find one that is not.
                   2786: 
                   2787:     while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column]) 
1.306     foxr     2788: 	   && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
1.305     foxr     2789: 	# Part of a span.
                   2790: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
                   2791: 	$current_column++;
                   2792:     }
                   2793:     $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
                   2794:    
                   2795: 
1.320     foxr     2796:     # Get the column and row spans.
                   2797:     # Colspan can be done via \multicolumn if I can figure out the data structs.
                   2798: 
                   2799:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
                   2800:     if (!$colspan) {
                   2801: 	$colspan = 1;
                   2802:     }
1.305     foxr     2803: 
                   2804:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
                   2805:     if (!$rowspan) {
                   2806: 	$rowspan = 1;
                   2807:     }
                   2808: 
1.303     foxr     2809: 
1.305     foxr     2810: 
1.320     foxr     2811:     for (my $c = 0; $c < $colspan; $c++) {
                   2812: 	$Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
                   2813: 	for (my $i = 1; $i < $rowspan; $i++) {
                   2814: 	    $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
                   2815: 	    if ($i == ($rowspan-1)) {
                   2816: 		$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
                   2817: 	    }
1.306     foxr     2818: 	}
1.305     foxr     2819:     }
1.304     foxr     2820: 
1.159     sakharuk 2821:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2822:     if (defined $TeXwidth) {		
1.357     foxr     2823: 	for (my $c = 0; $c < $colspan; $c++) {
                   2824: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2825: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2826: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2827: 	}
1.159     sakharuk 2828:     } else {
1.206     sakharuk 2829: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2830: 	    my $garbage_data=$data;
                   2831: 	    my $fwidth=0;
                   2832:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2833: 		my $current_length=&recalc($1);
                   2834: 		$current_length=~/(\d+\.?\d*)/;
                   2835: 		if ($fwidth<$1) {$fwidth=$1;}
                   2836: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2837: 	    }
                   2838:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2839: 		my $current_length=$1;
                   2840: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2841: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2842: 	    }
1.357     foxr     2843: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2844: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2845: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2846: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2847: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2848: 	    }
1.231     sakharuk 2849: 	} elsif ($data=~/\\parbox\{\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*\s*\}/ or $data=~/\\epsfxsize\s*=\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*/) {
                   2850: 	    my $garbage_data=$data;
                   2851: 	    my $fwidth=0;
                   2852:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2853: 		my $current_length=&recalc($1);
                   2854: 		$current_length=~/(\d+\.?\d*)/;
                   2855: 		if ($fwidth<$1) {$fwidth=$1;}
                   2856: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2857: 	    }
                   2858:             while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2859: 		my $current_length=&recalc($1);
                   2860: 		$current_length=~/(\d+\.?\d*)/;
                   2861: 		if ($fwidth<$1) {$fwidth=$1;}
                   2862: 		$garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2863: 	    }
1.357     foxr     2864: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2865: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2866: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2867: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2868: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2869: 	    }
1.231     sakharuk 2870: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2871: 	} else {  
1.166     sakharuk 2872: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2873: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2874: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2875: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2876: 	    if ($data=~/\\vskip/) {
                   2877:                 my $newdata=$data;
                   2878: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2879: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2880: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2881: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2882: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2883:                     my @words=split(/ /,$elementdata);
                   2884: 		    foreach my $word (@words) {
                   2885: 			my $lengthword=2.5*&LATEX_length($word);
                   2886: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2887: 		    }
1.166     sakharuk 2888: 		}
                   2889: 	    } else {
1.206     sakharuk 2890: 		$current_length=2.5*&LATEX_length($data);
                   2891:                     my @words=split(/ /,$data);
                   2892: 		    foreach my $word (@words) {
1.228     sakharuk 2893: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2894: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2895: 		    }
1.166     sakharuk 2896: 	    }
1.357     foxr     2897: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2898: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2899: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2900: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2901: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2902: 	    }
1.159     sakharuk 2903: 	}        
                   2904:     }
1.302     foxr     2905:     # Substitute all of the tables nested in this cell in their appropriate places.
                   2906: 
                   2907: 
                   2908:     my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
                   2909:     for (my $in=0; $in<=$nested_count; $in++) {    
1.301     foxr     2910: 	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
                   2911: 	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
                   2912: 	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2913: 	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
                   2914: 
                   2915:     }
                   2916:     # Should be be killing off the 'include' elements as they're used up?
1.305     foxr     2917: 
1.206     sakharuk 2918:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.305     foxr     2919: 
1.304     foxr     2920: 
                   2921: 
                   2922: 
                   2923:     #  the colspan array will indicate how many columns will be spanned by this
                   2924:     #  cell..this requires that counter_columns also be adjusted accordingly
                   2925:     #  so that the next bunch of text goes in the right cell.  Note that since
                   2926:     #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
                   2927:     #
                   2928: 
                   2929:     $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
                   2930:     for (my $i = 0; $i < ($colspan -1); $i++) {
                   2931: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
                   2932:     }
1.320     foxr     2933:     for (my $r = 0; $r < $rowspan; $r++) {
                   2934: 	$Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
                   2935: 	# Put empty text in spanned cols.
                   2936: 	
                   2937:     }
                   2938: 
1.398   ! foxr     2939:     }
1.304     foxr     2940: 
1.301     foxr     2941:     return '';
1.159     sakharuk 2942: }
                   2943: 
1.122     albertel 2944: sub end_td {
1.126     sakharuk 2945:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2946:     my $currentstring = '';
1.325     albertel 2947:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2948: 	$currentstring = $token->[2];     
                   2949:     } elsif ($target eq 'tex') {
1.160     sakharuk 2950:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2951: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2952:     }
                   2953:     return $currentstring;
                   2954: }
                   2955: 
1.166     sakharuk 2956: #-- <th> tag (end tag optional)
1.122     albertel 2957: sub start_th {
                   2958:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2959:     my $currentstring = '';
1.325     albertel 2960:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2961: 	$currentstring = $token->[4];     
                   2962:     } elsif ($target eq 'tex') {
1.230     sakharuk 2963: 	$Apache::londefdef::TD_redirection = 1;
                   2964: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2965:     } 
                   2966:     return $currentstring;
1.130     sakharuk 2967: }   
1.230     sakharuk 2968:     
                   2969: sub tagg_check {
                   2970:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2971:     my @ar=@$parstack; 
                   2972:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2973: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2974: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2975: 	    last;
                   2976: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2977: 	    splice @ar, $i+1;
                   2978: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   2979: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2980: 	    last;
                   2981: 	}
                   2982:     }
                   2983:     return '';
                   2984: }
                   2985:  
                   2986: sub start_th_tex {
                   2987:     my ($parstack,$parser,$safeeval) = @_;
1.398   ! foxr     2988: 
        !          2989:     my $alignment = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef,1);
        !          2990:     my $rowspan  =  &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 1);
        !          2991:     my $colspan  =  &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 1);
        !          2992: 
        !          2993:     my $config   = cell_config_hash($alignment, $rowspan, $colspan);
        !          2994:     my $table    = $Apache::londefdef::table[-1];
        !          2995:     $table->add_cell('\textbf{', $config);
        !          2996: 
        !          2997:     #-------------------------------------------------------------------------------------
        !          2998:     #
        !          2999:     #  Old table code.
        !          3000:     #
        !          3001:     #--------------------------------------------------------------------------------------
        !          3002: 
        !          3003:     if (0) {
        !          3004: 
        !          3005: 
1.230     sakharuk 3006:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   3007:     if ($alignchar eq '') {
                   3008: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   3009:     }
                   3010:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   3011:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   3012:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   3013:     if (defined $TeXwidth) {		
                   3014: 	my $current_length=&recalc($TeXwidth);
                   3015: 	$current_length=~/(\d+\.?\d*)/;
                   3016: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   3017:     }
1.398   ! foxr     3018:     }
        !          3019: 
        !          3020:     # Accept xml until the </th> tag.
        !          3021: 
1.230     sakharuk 3022:     &Apache::lonxml::startredirection();
                   3023:     return '';
                   3024: }
                   3025: 
                   3026: sub end_th_tex {
                   3027:     my ($parstack,$parser,$safeeval) = @_;
1.398   ! foxr     3028: 
        !          3029:     my $table = $Apache::londefdef::table[-1];
        !          3030:     my $text  = &Apache::lonxml::endredirection();
        !          3031:     $table->append_cell_text($text.'}');
        !          3032: 
        !          3033:     #-----------------------------------------------------------------------------
        !          3034:     #  Old table code:
        !          3035:     #-----------------------------------------------------------------------------
        !          3036: 
        !          3037:     if (0) {
1.230     sakharuk 3038:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   3039:     my $data=&Apache::lonxml::endredirection();
                   3040:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   3041:     if (defined $TeXwidth) {		
                   3042: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3043: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3044: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3045:     } else {
                   3046: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   3047: 	    my $garbage_data=$data;
                   3048: 	    my $fwidth=0;
                   3049:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   3050: 		my $current_length=&recalc($1);
                   3051: 		$current_length=~/(\d+\.?\d*)/;
                   3052: 		if ($fwidth<$1) {$fwidth=$1;}
                   3053: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   3054: 	    }
                   3055:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   3056: 		my $current_length=$1;
                   3057: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   3058: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   3059: 	    }
                   3060: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3061: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   3062: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3063: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3064: 	} else {  
                   3065: 	    $data=~s/^\s+(\S.*)/$1/; 
                   3066: 	    $data=~s/(.*\S)\s+$/$1/;
                   3067: 	    $data=~s/(\s)+/$1/;
                   3068: 	    my ($current_length,$min_length)=(0,0);
                   3069: 	    if ($data=~/\\vskip/) {
                   3070:                 my $newdata=$data;
                   3071: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   3072: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   3073: 		foreach my $elementdata (@newdata) {
                   3074: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   3075: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   3076:                     my @words=split(/ /,$elementdata);
                   3077: 		    foreach my $word (@words) {
                   3078: 			my $lengthword=2.5*&LATEX_length($word);
                   3079: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   3080: 		    }
                   3081: 		}
                   3082: 	    } else {
                   3083: 		$current_length=2.5*&LATEX_length($data);
                   3084:                     my @words=split(/ /,$data);
                   3085: 		    foreach my $word (@words) {
                   3086: 			my $lengthword=2*&LATEX_length($word);
                   3087: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   3088: 		    }
                   3089: 	    }
                   3090: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3091: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3092: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   3093: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   3094: 	}        
                   3095:     }
                   3096: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   3097: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   3098: 	}
                   3099:     #make data bold
                   3100:     $data='\textbf{'.$data.'}';
                   3101:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.398   ! foxr     3102:     }
1.230     sakharuk 3103:     return'';
                   3104: }
                   3105: 
1.122     albertel 3106: sub end_th {
1.130     sakharuk 3107:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3108:     my $currentstring = &end_p();	# Close any open <p> in the row.
1.325     albertel 3109:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3110: 	$currentstring .= $token->[2];     
1.122     albertel 3111:     } elsif ($target eq 'tex') {
1.230     sakharuk 3112:         $Apache::londefdef::TD_redirection =0;
                   3113: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 3114:     }
                   3115:     return $currentstring;
                   3116: }
1.230     sakharuk 3117:      
1.181     sakharuk 3118: #-- <img> tag (end tag forbidden)
1.249     foxr     3119: #
                   3120: #  Render the <IMG> tag.
                   3121: #     <IMG> has the following attributes (in addition to the 
                   3122: #     standard HTML ones:
                   3123: #      TeXwrap   - Governs how the tex target will try to wrap text around
                   3124: #                  horizontally aligned images.
                   3125: #      TeXwidth  - The width of the image when rendered for print (mm).
                   3126: #      TeXheight - The height of the image when rendered for print (mm)
                   3127: #         (Note there seems to also be support for this as a % of page size)
                   3128: #      
1.122     albertel 3129: sub start_img {
1.299     albertel 3130:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel 3131:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   3132: 					 undef,1);
1.325     albertel 3133:     if (! $src && 
                   3134: 	($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
                   3135: 	) { 
1.299     albertel 3136: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
1.189     albertel 3137: 	return '';
                   3138:     }
1.290     albertel 3139:     &Apache::lonxml::extlink($src);
1.122     albertel 3140:     my $currentstring = '';
                   3141:     my $scaling = .3;
1.249     foxr     3142: 
                   3143:    # Render unto browsers that which are the browser's...
                   3144: 
1.325     albertel 3145:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3146: 	if ($env{'browser.imagesuppress'} ne 'on') {
1.322     albertel 3147: 	    my $enc = ('yes' eq 
                   3148: 		       lc(&Apache::lonxml::get_param('encrypturl',$parstack,
                   3149: 						     $safeeval)));
                   3150: 	    $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
                   3151: 							 $enc);
1.122     albertel 3152: 	} else {
1.322     albertel 3153: 	    my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
                   3154: 						    undef,1);
                   3155: 	    if (!$alttag) {
                   3156: 		$alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3157: 						   $src);
1.51      sakharuk 3158: 	    }
1.158     sakharuk 3159: 	    $currentstring.='[IMAGE: '.$alttag.']';
1.1       sakharuk 3160: 	}
1.249     foxr     3161: 
                   3162: 	# and render unto TeX that which is LaTeX
                   3163: 
1.122     albertel 3164:     } elsif ($target eq 'tex') {
1.248     foxr     3165: 	#
                   3166: 	#  The alignment will require some superstructure to be put around
                   3167: 	#  the \includegraphics stuff.  At present we can only partially
                   3168: 	#  simulate the alignments offered by html.
                   3169: 	#
                   3170: 	#
                   3171: 	my $align = lc(&Apache::lonxml::get_param('align', 
                   3172: 						  $parstack,
                   3173: 						  $safeeval,
                   3174: 						  undef,1));
                   3175: 	if(!$align) {
1.287     foxr     3176: 		$align = "bottom";	# This is html's default so it's ours too.
1.248     foxr     3177: 	}
                   3178: 	#
                   3179: 	&Apache::lonxml::debug("Alignemnt = $align");
                   3180: 	#  LaTeX's image/text wrapping is really bad since it wants to
                   3181: 	#  make figures float.  
                   3182:         #   The user has the optional parameter (applicable only to l/r
                   3183: 	# alignment to use the picins/parpic directive to get wrapped text
                   3184: 	# this is also imperfect.. that's why we give them a choice...
                   3185: 	# so they can't yell at us for our choice.
                   3186: 	#
                   3187: 	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
                   3188: 							    $parstack,
                   3189: 							    $safeeval,
                   3190: 							    undef,0);
1.312     foxr     3191: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
1.248     foxr     3192: 	if(!$latex_rendering) {
1.312     foxr     3193: 		$latex_rendering = "texwrap";
                   3194: 	}
                   3195: 	# using texwrap inside a table does not work. So, if after all of this,
                   3196: 	# texwrap is on, we turn it off if we detect we're in a table:
                   3197: 	#
                   3198: 	if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
                   3199: 	    $latex_rendering = 'parpic';
1.248     foxr     3200: 	}
1.323     foxr     3201: 
1.312     foxr     3202: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
1.248     foxr     3203: 
1.390     foxr     3204: 	#if original bmp/gif/jpg/png file exist do following:
1.266     albertel 3205: 	my $origsrc=$src;
1.256     albertel 3206: 	my ($path,$file) = &get_eps_image($src);
1.341     foxr     3207: 	# &Apache::lonnet::logthis("Image source: $src result: $path $file");
1.122     albertel 3208: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.261     foxr     3209: 	&Apache::lonxml::debug("path = $path file = $file src = $src");
1.192     sakharuk 3210: 	if (-e $src) {
1.261     foxr     3211: 	    &Apache::lonxml::debug("$src exists");
1.256     albertel 3212: 	    my ($height_param,$width_param)=
1.266     albertel 3213: 		&image_size($origsrc,0.3,$parstack,$safeeval);
                   3214: 	    my $size;
                   3215: 	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
                   3216: 	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
1.341     foxr     3217: 	    # Default size if not able to extract that (e.g. eps image).
                   3218: 	    
                   3219: 	    # &Apache::lonnet::logthis("Size = $size");
                   3220: 	    
1.266     albertel 3221: 	    $size='['.$size;
                   3222: 	    $size=~s/,$/]/; 
1.344     albertel 3223: 	    $currentstring .= '\graphicspath{{'.$path.'}}'
                   3224: 		.'\includegraphics'.$size.'{'.$file.'} ';
1.354     foxr     3225: 	    my $closure;
                   3226: 	    ($currentstring, $closure) = &align_latex_image($align, 
                   3227: 							    $latex_rendering, 
                   3228: 							    $currentstring, 
                   3229: 							    $width_param, 
                   3230: 							    $height_param);
                   3231: 	    $currentstring .= $closure;
1.353     foxr     3232: 						
1.122     albertel 3233: 	} else {
1.261     foxr     3234: 	    &Apache::lonxml::debug("$src does not exist");
1.122     albertel 3235: 	    #original image file doesn't exist so check the alt attribute
                   3236: 	    my $alt = 
                   3237: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   3238: 	    unless ($alt) {
                   3239: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   3240: 	    }
                   3241: 
1.256     albertel 3242: 	    if ($alt) { $currentstring .= ' '.$alt.' '; }
1.59      sakharuk 3243: 	}
1.249     foxr     3244: 
                   3245: 	# And here's where the semi-quote breaks down: allow the user
                   3246:         # to edit the beast as well by rendering the problem for edit:
1.186     albertel 3247:     } elsif ($target eq 'edit') {
1.368     banghart 3248:         my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
1.186     albertel 3249: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   3250: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
1.368     banghart 3251: 	    &Apache::edit::browse('src',undef,'alt',$only).' '.
1.186     albertel 3252: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   3253: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   3254: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   3255: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   3256: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   3257: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 3258: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   3259: 						   ['','bottom','middle','top','left','right'],$token,5);
1.249     foxr     3260: 	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
1.348     albertel 3261: 						   ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
1.332     www      3262: 	$currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
1.322     albertel 3263: 						   ['no','yes'], $token, 2);
1.186     albertel 3264: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.249     foxr     3265: 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
                   3266: 	my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   3267: 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
                   3268: 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
                   3269: 
1.381     www      3270:         if ($token->[2]{'src'}=~/\$/) {
                   3271:            $currentstring.='Variable image source';
                   3272:         } else {
                   3273: 	   $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   3274: 	   if ($width) { $currentstring.=' width="'.$width.'" '; }
                   3275: 	   if ($height) { $currentstring.=' height="'.$height.'" '; }
                   3276: 	   $currentstring .= ' />';
                   3277:         }
1.186     albertel 3278:     } elsif ($target eq 'modified') {
1.210     albertel 3279: 	my ($osrc,$owidth,$oheight)=
                   3280: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   3281: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 3282: 					     $safeeval,'src','alt','align',
1.249     foxr     3283: 					     'TeXwidth','TeXheight', 'TeXwrap',
1.322     albertel 3284: 					     'width','height','encrypturl');
1.210     albertel 3285: 	my ($nsrc,$nwidth,$nheight)=
                   3286: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   3287: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   3288: 	&image_replication($loc);
                   3289: 	my ($iwidth,$iheight);
                   3290: 	if (-e $loc) {
                   3291: 	    my $image = Image::Magick->new;
                   3292: 	    $image->Read($loc);
                   3293: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   3294: 				   $image->Get('height'));
                   3295: 	}
                   3296: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   3297: 	    # changed image or no size specified,
                   3298:             # if they didn't explicitly change the 
                   3299:             # width or height use the ones from the image
                   3300: 	    if ($iwidth && $iheight) {
                   3301: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   3302: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   3303: 		}
                   3304: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   3305: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 3306: 		}
                   3307: 	    }
                   3308: 	}
1.210     albertel 3309: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   3310: 	# if we don't have a width or height
                   3311: 	if ($iwidth && $cwidth && !$cheight) {
                   3312: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   3313: 	}
                   3314: 	if ($iheight && $cheight && !$cwidth) {
                   3315: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   3316: 	}
                   3317: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 3318:     }
1.261     foxr     3319: 
1.122     albertel 3320:     return $currentstring;
                   3321: }
                   3322: 
                   3323: sub end_img {
                   3324:     my ($target,$token) = @_;
                   3325:     my $currentstring = '';
1.325     albertel 3326:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3327: 	$currentstring = $token->[2];
                   3328:     } elsif ($target eq 'tex') {
                   3329: 	$currentstring = '';
                   3330:     }
                   3331:     return $currentstring;
                   3332: }
                   3333: 
1.181     sakharuk 3334: #-- <applet> tag (end tag required)
1.122     albertel 3335: sub start_applet {
                   3336:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3337:     
                   3338:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
1.290     albertel 3339:     &Apache::lonxml::extlink($code);
1.122     albertel 3340:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   3341: 					   undef,1);
1.290     albertel 3342:     &Apache::lonxml::extlink($archive);
1.122     albertel 3343:     my $currentstring = '';
1.325     albertel 3344:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3345: 	if ($env{'browser.appletsuppress'} ne 'on') {
1.250     albertel 3346: 	    $currentstring = &Apache::lonenc::encrypt_ref($token,
                   3347: 							  {'code'=>$code,
                   3348: 							   'archive'=>$archive}
                   3349: 							  );
1.122     albertel 3350: 	} else {
                   3351: 	    my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3352: 						   $safeeval,undef,1);
                   3353: 	    unless ($alttag) {
                   3354: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3355: 						 $code);
1.44      sakharuk 3356: 	    }
1.122     albertel 3357: 	    $currentstring='[APPLET: '.$alttag.']';
1.1       sakharuk 3358: 	}
1.122     albertel 3359:     } elsif ($target eq 'tex') {
1.361     foxr     3360: 	# Turn off some stuff we can't be inside thank you LaTeX
                   3361: 	
                   3362: 
                   3363: 	my $restart_sub = 0;
                   3364: 	my $restart_sup = 0;
                   3365: 
                   3366: 	# Since <sub> and <sup> are simple tags it's ok to turn off/on
                   3367: 	# using the start_ stop_ functions.. those tags only care about
                   3368: 	# $target.
                   3369: 
                   3370: 	if (&is_inside_of($tagstack, "sub")) {
                   3371: 	    $restart_sub = 1;
                   3372: 	    $currentstring .= &end_sub($target, $token, $tagstack, 
                   3373: 				       $parstack, $parser, $safeeval);
                   3374: 	}
                   3375: 	if (&is_inside_of($tagstack, "sup")) {
                   3376: 	    $restart_sup = 1;
                   3377: 	    $currentstring .= &end_sup($target, $token, $tagstack,
                   3378: 				       $parstack, $parser, $safeeval);
                   3379: 	}
                   3380: 
                   3381: 	# Now process the applet; just replace it with its alt attribute.
                   3382: 
1.177     albertel 3383: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3384: 					       $safeeval,undef,1);
                   3385: 	unless ($alttag) {
                   3386: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   3387: 						undef,1);
                   3388: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3389: 					     $code);
1.175     sakharuk 3390: 	}
1.177     albertel 3391: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   3392: 	    '.}\end{center}';
1.361     foxr     3393: 
                   3394: 	# Turn stuff back on that we can't be inside of.
                   3395: 
                   3396: 	if ($restart_sub) {
                   3397: 	    $currentstring .= &start_sub($target, $token, $tagstack,
                   3398: 					$parstack, $parser, $safeeval);
                   3399: 	}
                   3400: 	if ($restart_sup) {
                   3401: 	    $currentstring .= &start_sup($target, $token, $tagstack,
                   3402: 					 $parstack, $parser, $safeeval);
                   3403: 	}
1.122     albertel 3404:     } 
                   3405:     return $currentstring;
                   3406: }
                   3407: 
                   3408: sub end_applet {
                   3409:     my ($target,$token) = @_;
                   3410:     my $currentstring = '';
1.325     albertel 3411:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3412: 	$currentstring = $token->[2];
                   3413:     } elsif ($target eq 'tex') {
                   3414:     } 
                   3415:     return $currentstring;
                   3416: }
                   3417: 
1.181     sakharuk 3418: #-- <embed> tag (end tag optional/required)
1.122     albertel 3419: sub start_embed {    
                   3420:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3421:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3422:     &Apache::lonxml::extlink($src);
1.122     albertel 3423:     my $currentstring = '';
1.325     albertel 3424:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3425: 	if ($env{'browser.embedsuppress'} ne 'on') {
1.250     albertel 3426: 	    $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 3427: 	} else {
                   3428: 	    my $alttag=&Apache::lonxml::get_param
                   3429: 		('alt',$parstack,$safeeval,undef,1);
                   3430: 	    unless ($alttag) {
                   3431: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
1.42      albertel 3432: 	    }
1.122     albertel 3433: 	    $currentstring='[EMBED: '.$alttag.']';
1.10      www      3434: 	}
1.122     albertel 3435:     } elsif ($target eq 'tex') {
                   3436:     } 
                   3437:     return $currentstring;
                   3438: }
                   3439: 
                   3440: sub end_embed {
                   3441:     my ($target,$token) = @_;
                   3442:     my $currentstring = '';
1.325     albertel 3443:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3444: 	$currentstring = $token->[2];     
1.175     sakharuk 3445:     } elsif ($target eq 'tex') {  
1.122     albertel 3446:     } 
                   3447:     return $currentstring;
                   3448: }
                   3449: 
1.181     sakharuk 3450: #-- <param> tag (end tag forbidden)
1.122     albertel 3451: sub start_param {
                   3452:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.290     albertel 3453:     if (&Apache::lonxml::get_param('name',$parstack,
                   3454: 				   $safeeval,undef,1)=~/^cabbase$/i) {
                   3455: 	my $value=&Apache::lonxml::get_param('value',$parstack,
                   3456: 					     $safeeval,undef,1);
                   3457: 	&Apache::lonxml::extlink($value);
                   3458:     } 
                   3459:   
                   3460:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3461:     &Apache::lonxml::extlink($src);
1.122     albertel 3462:     my $currentstring = '';
1.325     albertel 3463:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 3464: 	my %toconvert;
                   3465: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3466: 	if ($src) { $toconvert{'src'}= $src; }
                   3467: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
                   3468: 					    undef,1);
1.251     albertel 3469: 	if ($name=~/^cabbase$/i) {
                   3470: 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
                   3471: 							   $safeeval,undef,1);
                   3472: 	}
1.250     albertel 3473: 	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
1.122     albertel 3474:     } elsif ($target eq 'tex') {
                   3475:     } 
                   3476:     return $currentstring;
                   3477: }
                   3478: 
                   3479: sub end_param {
                   3480:     my ($target,$token) = @_;
                   3481:     my $currentstring = '';
1.325     albertel 3482:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3483: 	$currentstring = $token->[2];     
                   3484:     } elsif ($target eq 'tex') {
                   3485:     } 
                   3486:     return $currentstring;
                   3487: }
                   3488: 
                   3489: #-- <allow> tag
                   3490: sub start_allow {
                   3491:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3492:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3493:     &Apache::lonxml::extlink($src);
                   3494: 
1.241     albertel 3495:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 3496:     my $result;
                   3497:     if ($target eq 'edit') {
                   3498: 	$result .=&Apache::edit::tag_start($target,$token);
                   3499: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   3500: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   3501:     } elsif ($target eq 'modified') {
                   3502: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   3503: 						     $safeeval,'src');
                   3504: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   3505:     }
                   3506:     return $result;
                   3507: }
                   3508: 
                   3509: sub end_allow {
                   3510:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3511:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   3512:     return '';
                   3513: }
1.119     www      3514: 
1.181     sakharuk 3515: #-- Frames (end tag required)
                   3516: #-- <frameset>
1.122     albertel 3517: sub start_frameset {
                   3518:     my ($target,$token) = @_;
1.277     foxr     3519:     my $currentstring = '';	# Close any pending para.
1.325     albertel 3520:     if ($target eq 'web' || $target eq 'webgrade') { 
1.328     albertel 3521: 	$currentstring = 
                   3522: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
                   3523: 					   $Apache::londefdef::head,
                   3524: 					   {'add_entries'    => $token->[2],
                   3525: 					    'no_title'       => 1,
                   3526: 					    'force_register' => 1,
                   3527: 					    'frameset'       => 1,});
                   3528: 
1.122     albertel 3529:     }
                   3530:     return $currentstring;
                   3531: }
                   3532: 
                   3533: sub end_frameset {
                   3534:     my ($target,$token) = @_;
                   3535:     my $currentstring = '';
1.325     albertel 3536:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3537: 	$currentstring = $token->[2];
                   3538:     }
                   3539:     return $currentstring;
                   3540: }
1.162     sakharuk 3541: 
1.181     sakharuk 3542: #-- <xmp> (end tag required)
1.162     sakharuk 3543: sub start_xmp {
                   3544:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3545:     my $currentstring = '';
1.325     albertel 3546:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3547: 	$currentstring .= $token->[4];
                   3548:     } elsif ($target eq 'tex') {
                   3549: 	$currentstring .= '\begin{verbatim}';
                   3550:     } 
                   3551:     return $currentstring;
                   3552: }
                   3553: 
                   3554: sub end_xmp {
                   3555:     my ($target,$token) = @_;
                   3556:     my $currentstring = '';
1.325     albertel 3557:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3558: 	$currentstring .= $token->[2];
                   3559:     } elsif ($target eq 'tex') {
                   3560: 	$currentstring .= '\end{verbatim}';
                   3561:     }
                   3562:     return $currentstring;
                   3563: }
                   3564: 
1.181     sakharuk 3565: #-- <pre> (end tag required)
1.122     albertel 3566: sub start_pre {
1.126     sakharuk 3567:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3568:     my $currentstring = &end_p();	# close off pending <p>
1.325     albertel 3569:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3570: 	$currentstring .= $token->[4];
                   3571:     } elsif ($target eq 'tex') {
1.136     sakharuk 3572: 	$currentstring .= '\begin{verbatim}';
1.319     albertel 3573: 	&Apache::lonxml::disable_LaTeX_substitutions();
1.122     albertel 3574:     } 
                   3575:     return $currentstring;
                   3576: }
                   3577: 
                   3578: sub end_pre {
                   3579:     my ($target,$token) = @_;
                   3580:     my $currentstring = '';
1.325     albertel 3581:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3582: 	$currentstring .= $token->[2];
                   3583:     } elsif ($target eq 'tex') {
1.136     sakharuk 3584: 	$currentstring .= '\end{verbatim}';
1.319     albertel 3585: 	&Apache::lonxml::enable_LaTeX_substitutions();
1.122     albertel 3586:     }
                   3587:     return $currentstring;
                   3588: }
                   3589: 
                   3590: #-- <insert>
                   3591: sub start_insert {
                   3592:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3593:     my $currentstring = '';
1.325     albertel 3594:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3595: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3596: 	$currentstring .= '<b>'.$display.'</b>';;
                   3597:     }
                   3598:     return $currentstring;
                   3599: }
                   3600: 
                   3601: sub end_insert {
                   3602:     my ($target,$token) = @_;
                   3603:     my $currentstring = '';
1.325     albertel 3604:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3605: 	$currentstring .= '';
                   3606:     }
                   3607:     return $currentstring;
                   3608: }
                   3609: 
                   3610: #-- <externallink>
                   3611: sub start_externallink {
                   3612:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3613:     my $currentstring = '';
1.325     albertel 3614:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3615: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3616: 	$currentstring .= '<b>'.$display.'</b>';;
                   3617:     }
                   3618:     return $currentstring;
                   3619: }
                   3620: 
                   3621: sub end_externallink {
                   3622:     my ($target,$token) = @_;
                   3623:     my $currentstring = '';
1.325     albertel 3624:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3625: 	$currentstring .= '';
                   3626:     }
                   3627:     return $currentstring;
                   3628: }
                   3629: 
                   3630: #-- <blankspace heigth="">
                   3631: sub start_blankspace {
                   3632:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3633:     my $currentstring = &end_p();	# closes off any unclosed <p>
1.122     albertel 3634:     if ($target eq 'tex') {
                   3635: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   3636: 	$currentstring .= '\vskip '.$howmuch.' ';
                   3637:     }
                   3638:     return $currentstring;
                   3639: }
                   3640: 
                   3641: sub end_blankspace {
                   3642:     my ($target,$token) = @_;
                   3643:     my $currentstring = '';
                   3644:     if ($target eq 'tex') {
                   3645: 	$currentstring .= '';
                   3646:     }
                   3647:     return $currentstring;
                   3648: }
                   3649: 
1.181     sakharuk 3650: #-- <abbr> tag (end tag required)
1.122     albertel 3651: sub start_abbr {
                   3652:     my ($target,$token) = @_;
                   3653:     my $currentstring = '';
1.325     albertel 3654:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3655: 	$currentstring = $token->[4];     
                   3656:     } 
                   3657:     return $currentstring;
                   3658: }
                   3659: 
                   3660: sub end_abbr {
                   3661:     my ($target,$token) = @_;
                   3662:     my $currentstring = '';
1.325     albertel 3663:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3664: 	$currentstring = $token->[2];    
                   3665:     } 
                   3666:     return $currentstring;
                   3667: }
                   3668: 
1.181     sakharuk 3669: #-- <acronym> tag (end tag required)
1.122     albertel 3670: sub start_acronym {
                   3671:     my ($target,$token) = @_;
                   3672:     my $currentstring = '';
1.325     albertel 3673:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3674: 	$currentstring = $token->[4];     
                   3675:     } 
                   3676:     return $currentstring;
                   3677: }
                   3678: 
                   3679: sub end_acronym {
                   3680:     my ($target,$token) = @_;
                   3681:     my $currentstring = '';
1.325     albertel 3682:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3683: 	$currentstring = $token->[2];    
                   3684:     } 
                   3685:     return $currentstring;
                   3686: }
                   3687: 
1.181     sakharuk 3688: #-- <area> tag (end tag forbidden)
1.122     albertel 3689: sub start_area {
                   3690:     my ($target,$token) = @_;
                   3691:     my $currentstring = '';
1.325     albertel 3692:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3693: 	$currentstring = $token->[4];     
                   3694:     } 
                   3695:     return $currentstring;
                   3696: }
                   3697: 
                   3698: sub end_area {
                   3699:     my ($target,$token) = @_;
                   3700:     my $currentstring = '';
1.325     albertel 3701:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3702: 	$currentstring = $token->[2];    
                   3703:     } 
                   3704:     return $currentstring;
                   3705: }
                   3706: 
1.181     sakharuk 3707: #-- <base> tag (end tag forbidden)
1.122     albertel 3708: sub start_base {
                   3709:     my ($target,$token) = @_;
                   3710:     my $currentstring = '';
1.325     albertel 3711:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3712: 	$currentstring = $token->[4];     
1.161     sakharuk 3713:     }
1.122     albertel 3714:     return $currentstring;
                   3715: }
                   3716: 
                   3717: sub end_base {
                   3718:     my ($target,$token) = @_;
                   3719:     my $currentstring = '';
1.325     albertel 3720:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3721: 	$currentstring = $token->[2];    
                   3722:     } 
                   3723:     return $currentstring;
                   3724: }
                   3725: 
1.181     sakharuk 3726: #-- <bdo> tag (end tag required)
1.122     albertel 3727: sub start_bdo {
                   3728:     my ($target,$token) = @_;
                   3729:     my $currentstring = '';
1.325     albertel 3730:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3731: 	$currentstring = $token->[4];     
                   3732:     } 
                   3733:     return $currentstring;
                   3734: }
                   3735: 
                   3736: sub end_bdo {
                   3737:     my ($target,$token) = @_;
                   3738:     my $currentstring = '';
1.325     albertel 3739:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3740: 	$currentstring = $token->[2];    
                   3741:     } 
                   3742:     return $currentstring;
                   3743: }
                   3744: 
1.181     sakharuk 3745: #-- <bgsound> tag (end tag optional)
1.122     albertel 3746: sub start_bgsound {
                   3747:     my ($target,$token) = @_;
                   3748:     my $currentstring = '';
1.325     albertel 3749:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3750: 	$currentstring = $token->[4];     
                   3751:     } 
                   3752:     return $currentstring;
                   3753: }
                   3754: 
                   3755: sub end_bgsound {
                   3756:     my ($target,$token) = @_;
                   3757:     my $currentstring = '';
1.325     albertel 3758:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3759: 	$currentstring = $token->[2];    
                   3760:     } 
                   3761:     return $currentstring;
                   3762: }
                   3763: 
1.181     sakharuk 3764: #-- <blink> tag (end tag required)
1.122     albertel 3765: sub start_blink {
                   3766:     my ($target,$token) = @_;
                   3767:     my $currentstring = '';
1.325     albertel 3768:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3769: 	$currentstring = $token->[4];     
                   3770:     } 
                   3771:     return $currentstring;
                   3772: }
                   3773: 
                   3774: sub end_blink {
                   3775:     my ($target,$token) = @_;
                   3776:     my $currentstring = '';
1.325     albertel 3777:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3778: 	$currentstring = $token->[2];    
                   3779:     } 
                   3780:     return $currentstring;
                   3781: }
                   3782: 
1.181     sakharuk 3783: #-- <blockquote> tag (end tag required)
1.122     albertel 3784: sub start_blockquote {
                   3785:     my ($target,$token) = @_;
1.279     foxr     3786:     my $currentstring = &end_p();	# Close any unclosed <p>
1.325     albertel 3787:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3788: 	$currentstring .= $token->[4];     
1.122     albertel 3789:     } 
1.339     foxr     3790:     if ($target eq 'tex') {
                   3791: 	$currentstring .= '\begin{quote}';
                   3792:     }
1.122     albertel 3793:     return $currentstring;
                   3794: }
                   3795: 
                   3796: sub end_blockquote {
                   3797:     my ($target,$token) = @_;
                   3798:     my $currentstring = '';
1.325     albertel 3799:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3800: 	$currentstring = $token->[2];    
                   3801:     } 
1.339     foxr     3802:     if ($target eq 'tex') {
                   3803: 	$currentstring = '\end{quote}';
                   3804:     }
1.122     albertel 3805:     return $currentstring;
                   3806: }
                   3807: 
1.181     sakharuk 3808: #-- <button> tag (end tag required)
1.122     albertel 3809: sub start_button {
                   3810:     my ($target,$token) = @_;
                   3811:     my $currentstring = '';
1.325     albertel 3812:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3813: 	$currentstring = $token->[4];     
                   3814:     } 
                   3815:     return $currentstring;
                   3816: }
                   3817: 
                   3818: sub end_button {
                   3819:     my ($target,$token) = @_;
                   3820:     my $currentstring = '';
1.325     albertel 3821:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3822: 	$currentstring = $token->[2];    
                   3823:     } 
                   3824:     return $currentstring;
                   3825: }
                   3826: 
1.181     sakharuk 3827: #-- <caption> tag (end tag required)
1.122     albertel 3828: sub start_caption {
                   3829:     my ($target,$token) = @_;
                   3830:     my $currentstring = '';
1.325     albertel 3831:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3832: 	$currentstring = $token->[4];     
                   3833:     } 
                   3834:     return $currentstring;
                   3835: }
                   3836: 
                   3837: sub end_caption {
                   3838:     my ($target,$token) = @_;
                   3839:     my $currentstring = '';
1.325     albertel 3840:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3841: 	$currentstring = $token->[2];    
                   3842:     } 
                   3843:     return $currentstring;
                   3844: }
                   3845: 
1.181     sakharuk 3846: #-- <col> tag (end tag forbdden)
1.122     albertel 3847: sub start_col {
                   3848:     my ($target,$token) = @_;
                   3849:     my $currentstring = '';
1.325     albertel 3850:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3851: 	$currentstring = $token->[4];     
                   3852:     } 
                   3853:     return $currentstring;
                   3854: }
                   3855: 
                   3856: sub end_col {
                   3857:     my ($target,$token) = @_;
                   3858:     my $currentstring = '';
1.325     albertel 3859:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3860: 	$currentstring = $token->[2];    
                   3861:     } 
                   3862:     return $currentstring;
                   3863: }
                   3864: 
1.181     sakharuk 3865: #-- <colgroup> tag (end tag optional)
1.122     albertel 3866: sub start_colgroup {
                   3867:     my ($target,$token) = @_;
                   3868:     my $currentstring = '';
1.325     albertel 3869:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3870: 	$currentstring = $token->[4];     
                   3871:     } 
                   3872:     return $currentstring;
                   3873: }
                   3874: 
                   3875: sub end_colgroup {
                   3876:     my ($target,$token) = @_;
                   3877:     my $currentstring = '';
1.325     albertel 3878:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3879: 	$currentstring = $token->[2];    
                   3880:     } 
                   3881:     return $currentstring;
                   3882: }
                   3883: 
1.181     sakharuk 3884: #-- <del> tag (end tag required)
1.122     albertel 3885: sub start_del {
                   3886:     my ($target,$token) = @_;
                   3887:     my $currentstring = '';
1.325     albertel 3888:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3889: 	$currentstring = $token->[4];     
                   3890:     } 
                   3891:     return $currentstring;
                   3892: }
                   3893: 
                   3894: sub end_del {
                   3895:     my ($target,$token) = @_;
                   3896:     my $currentstring = '';
1.325     albertel 3897:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3898: 	$currentstring = $token->[2];    
                   3899:     } 
                   3900:     return $currentstring;
                   3901: }
                   3902: 
1.181     sakharuk 3903: #-- <fieldset> tag (end tag required)
1.122     albertel 3904: sub start_fieldset {
                   3905:     my ($target,$token) = @_;
                   3906:     my $currentstring = '';
1.325     albertel 3907:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3908: 	$currentstring = $token->[4];     
                   3909:     } 
                   3910:     return $currentstring;
                   3911: }
                   3912: 
                   3913: sub end_fieldset {
                   3914:     my ($target,$token) = @_;
                   3915:     my $currentstring = '';
1.325     albertel 3916:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3917: 	$currentstring = $token->[2];    
                   3918:     } 
                   3919:     return $currentstring;
                   3920: }
                   3921: 
1.181     sakharuk 3922: #-- <frame> tag (end tag forbidden)
1.122     albertel 3923: sub start_frame {
                   3924:     my ($target,$token) = @_;
                   3925:     my $currentstring = '';
1.325     albertel 3926:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3927: 	$currentstring = $token->[4];     
                   3928:     } 
                   3929:     return $currentstring;
                   3930: }
                   3931: 
                   3932: sub end_frame {
                   3933:     my ($target,$token) = @_;
                   3934:     my $currentstring = '';
1.325     albertel 3935:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3936: 	$currentstring = $token->[2];    
                   3937:     } 
                   3938:     return $currentstring;
                   3939: }
                   3940: 
1.181     sakharuk 3941: #-- <iframe> tag (end tag required)
1.122     albertel 3942: sub start_iframe {
                   3943:     my ($target,$token) = @_;
                   3944:     my $currentstring = '';
1.325     albertel 3945:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3946: 	$currentstring = $token->[4];     
                   3947:     } 
                   3948:     return $currentstring;
                   3949: }
                   3950: 
                   3951: sub end_iframe {
                   3952:     my ($target,$token) = @_;
                   3953:     my $currentstring = '';
1.325     albertel 3954:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3955: 	$currentstring = $token->[2];    
                   3956:     } 
                   3957:     return $currentstring;
                   3958: }
                   3959: 
1.181     sakharuk 3960: #-- <ins> tag (end tag required)
1.122     albertel 3961: sub start_ins {
                   3962:     my ($target,$token) = @_;
                   3963:     my $currentstring = '';
1.325     albertel 3964:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3965: 	$currentstring = $token->[4];     
                   3966:     } 
                   3967:     return $currentstring;
                   3968: }
                   3969: 
                   3970: sub end_ins {
                   3971:     my ($target,$token) = @_;
                   3972:     my $currentstring = '';
1.325     albertel 3973:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3974: 	$currentstring = $token->[2];    
                   3975:     } 
                   3976:     return $currentstring;
                   3977: }
                   3978: 
1.181     sakharuk 3979: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3980: sub start_isindex {
                   3981:     my ($target,$token) = @_;
                   3982:     my $currentstring = '';
1.325     albertel 3983:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3984: 	$currentstring = $token->[4];     
                   3985:     } 
                   3986:     return $currentstring;
                   3987: }
                   3988: 
                   3989: sub end_isindex {
                   3990:     my ($target,$token) = @_;
                   3991:     my $currentstring = '';
1.325     albertel 3992:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3993: 	$currentstring = $token->[2];    
                   3994:     } 
                   3995:     return $currentstring;
                   3996: }
                   3997: 
1.181     sakharuk 3998: #-- <keygen> tag (end tag forbidden)
1.122     albertel 3999: sub start_keygen {
                   4000:     my ($target,$token) = @_;
                   4001:     my $currentstring = '';
1.325     albertel 4002:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4003: 	$currentstring = $token->[4];     
                   4004:     } 
                   4005:     return $currentstring;
                   4006: }
                   4007: 
                   4008: sub end_keygen {
                   4009:     my ($target,$token) = @_;
                   4010:     my $currentstring = '';
1.325     albertel 4011:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4012: 	$currentstring = $token->[2];    
                   4013:     } 
                   4014:     return $currentstring;
                   4015: }
                   4016: 
                   4017: #-- <label> tag
                   4018: sub start_label {
                   4019:     my ($target,$token) = @_;
                   4020:     my $currentstring = '';
1.325     albertel 4021:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4022: 	$currentstring = $token->[4];     
                   4023:     } 
                   4024:     return $currentstring;
                   4025: }
                   4026: 
                   4027: sub end_label {
                   4028:     my ($target,$token) = @_;
                   4029:     my $currentstring = '';
1.325     albertel 4030:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4031: 	$currentstring = $token->[2];    
                   4032:     } 
                   4033:     return $currentstring;
                   4034: }
                   4035: 
1.181     sakharuk 4036: #-- <layer> tag (end tag required)
1.122     albertel 4037: sub start_layer {
                   4038:     my ($target,$token) = @_;
                   4039:     my $currentstring = '';
1.325     albertel 4040:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4041: 	$currentstring = $token->[4];     
                   4042:     } 
                   4043:     return $currentstring;
                   4044: }
                   4045: 
                   4046: sub end_layer {
                   4047:     my ($target,$token) = @_;
                   4048:     my $currentstring = '';
1.325     albertel 4049:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4050: 	$currentstring = $token->[2];    
                   4051:     } 
                   4052:     return $currentstring;
                   4053: }
                   4054: 
1.181     sakharuk 4055: #-- <legend> tag (end tag required)
1.122     albertel 4056: sub start_legend {
                   4057:     my ($target,$token) = @_;
                   4058:     my $currentstring = '';
1.325     albertel 4059:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4060: 	$currentstring = $token->[4];     
                   4061:     } 
                   4062:     return $currentstring;
                   4063: }
                   4064: 
                   4065: sub end_legend {
                   4066:     my ($target,$token) = @_;
                   4067:     my $currentstring = '';
1.325     albertel 4068:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4069: 	$currentstring = $token->[2];    
                   4070:     } 
                   4071:     return $currentstring;
                   4072: }
                   4073: 
1.181     sakharuk 4074: #-- <link> tag (end tag forbidden)
1.122     albertel 4075: sub start_link {
1.292     albertel 4076:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 4077:     my $currentstring = '';
1.324     albertel 4078:     if ($target eq 'web' || $target eq 'webgrade') {
1.291     albertel 4079: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   4080: 					    undef,1);
                   4081: 	&Apache::lonxml::extlink($href);
1.122     albertel 4082: 	$currentstring = $token->[4];     
                   4083:     } 
                   4084:     return $currentstring;
                   4085: }
                   4086: 
                   4087: sub end_link {
                   4088:     my ($target,$token) = @_;
                   4089:     my $currentstring = '';
1.325     albertel 4090:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4091: 	$currentstring = $token->[2];    
                   4092:     } 
                   4093:     return $currentstring;
                   4094: }
                   4095: 
1.181     sakharuk 4096: #-- <marquee> tag (end tag optional)
1.122     albertel 4097: sub start_marquee {
                   4098:     my ($target,$token) = @_;
                   4099:     my $currentstring = '';
1.325     albertel 4100:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4101: 	$currentstring = $token->[4];     
                   4102:     } 
                   4103:     return $currentstring;
                   4104: }
                   4105: 
                   4106: sub end_marquee {
                   4107:     my ($target,$token) = @_;
                   4108:     my $currentstring = '';
1.325     albertel 4109:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4110: 	$currentstring = $token->[2];    
                   4111:     } 
                   4112:     return $currentstring;
                   4113: }
                   4114: 
1.179     sakharuk 4115: #-- <multicol> tag (end tag required)
                   4116: sub start_multicol {
1.122     albertel 4117:     my ($target,$token) = @_;
1.279     foxr     4118:     my $currentstring = &end_p();	# Close any pending <p>
1.325     albertel 4119:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     4120: 	$currentstring .= $token->[4];     
1.122     albertel 4121:     } 
                   4122:     return $currentstring;
                   4123: }
                   4124: 
1.179     sakharuk 4125: sub end_multicol {
1.122     albertel 4126:     my ($target,$token) = @_;
                   4127:     my $currentstring = '';
1.325     albertel 4128:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4129: 	$currentstring = $token->[2];    
                   4130:     } 
                   4131:     return $currentstring;
                   4132: }
                   4133: 
1.179     sakharuk 4134: #-- <nobr> tag (end tag required)
1.122     albertel 4135: sub start_nobr {
                   4136:     my ($target,$token) = @_;
                   4137:     my $currentstring = '';
1.325     albertel 4138:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4139: 	$currentstring = $token->[4];     
1.179     sakharuk 4140:     }  elsif ($target eq 'tex') {
                   4141: 	$currentstring='\mbox{';
                   4142:     }
1.122     albertel 4143:     return $currentstring;
                   4144: }
                   4145: 
                   4146: sub end_nobr {
                   4147:     my ($target,$token) = @_;
                   4148:     my $currentstring = '';
1.325     albertel 4149:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4150: 	$currentstring = $token->[2];    
1.179     sakharuk 4151:     }   elsif ($target eq 'tex') {
                   4152: 	$currentstring='}';
                   4153:     }
1.122     albertel 4154:     return $currentstring;
                   4155: }
                   4156: 
1.179     sakharuk 4157: #-- <noembed> tag (end tag required)
1.122     albertel 4158: sub start_noembed {
                   4159:     my ($target,$token) = @_;
                   4160:     my $currentstring = '';
1.325     albertel 4161:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4162: 	$currentstring = $token->[4];     
                   4163:     } 
                   4164:     return $currentstring;
                   4165: }
                   4166: 
                   4167: sub end_noembed {
                   4168:     my ($target,$token) = @_;
                   4169:     my $currentstring = '';
1.325     albertel 4170:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4171: 	$currentstring = $token->[2];    
                   4172:     } 
                   4173:     return $currentstring;
                   4174: }
                   4175: 
1.179     sakharuk 4176: #-- <noframes> tag (end tag required)
1.122     albertel 4177: sub start_noframes {
                   4178:     my ($target,$token) = @_;
                   4179:     my $currentstring = '';
1.325     albertel 4180:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4181: 	$currentstring = $token->[4];     
                   4182:     } 
                   4183:     return $currentstring;
                   4184: }
                   4185: 
                   4186: sub end_noframes {
                   4187:     my ($target,$token) = @_;
                   4188:     my $currentstring = '';
1.325     albertel 4189:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4190: 	$currentstring = $token->[2];    
                   4191:     } 
                   4192:     return $currentstring;
                   4193: }
                   4194: 
1.179     sakharuk 4195: #-- <nolayer> tag (end tag required)
1.122     albertel 4196: sub start_nolayer {
                   4197:     my ($target,$token) = @_;
                   4198:     my $currentstring = '';
1.325     albertel 4199:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4200: 	$currentstring = $token->[4];     
                   4201:     } 
                   4202:     return $currentstring;
                   4203: }
                   4204: 
                   4205: sub end_nolayer {
                   4206:     my ($target,$token) = @_;
                   4207:     my $currentstring = '';
1.325     albertel 4208:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4209: 	$currentstring = $token->[2];    
                   4210:     } 
                   4211:     return $currentstring;
                   4212: }
                   4213: 
1.179     sakharuk 4214: #-- <noscript> tag (end tag required)
1.122     albertel 4215: sub start_noscript {
                   4216:     my ($target,$token) = @_;
                   4217:     my $currentstring = '';
1.325     albertel 4218:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4219: 	$currentstring = $token->[4];     
                   4220:     } 
                   4221:     return $currentstring;
                   4222: }
                   4223: 
                   4224: sub end_noscript {
                   4225:     my ($target,$token) = @_;
                   4226:     my $currentstring = '';
1.325     albertel 4227:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4228: 	$currentstring = $token->[2];    
                   4229:     } 
                   4230:     return $currentstring;
                   4231: }
                   4232: 
1.179     sakharuk 4233: #-- <object> tag (end tag required)
1.122     albertel 4234: sub start_object {
                   4235:     my ($target,$token) = @_;
                   4236:     my $currentstring = '';
1.325     albertel 4237:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4238: 	$currentstring = $token->[4];     
                   4239:     } 
                   4240:     return $currentstring;
                   4241: }
                   4242: 
                   4243: sub end_object {
                   4244:     my ($target,$token) = @_;
                   4245:     my $currentstring = '';
1.325     albertel 4246:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4247: 	$currentstring = $token->[2];    
                   4248:     } 
                   4249:     return $currentstring;
                   4250: }
                   4251: 
1.179     sakharuk 4252: #-- <optgroup> tag (end tag required)
1.122     albertel 4253: sub start_optgroup {
                   4254:     my ($target,$token) = @_;
                   4255:     my $currentstring = '';
1.325     albertel 4256:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4257: 	$currentstring = $token->[4];     
                   4258:     } 
                   4259:     return $currentstring;
                   4260: }
                   4261: 
                   4262: sub end_optgroup {
                   4263:     my ($target,$token) = @_;
                   4264:     my $currentstring = '';
1.325     albertel 4265:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4266: 	$currentstring = $token->[2];    
                   4267:     } 
                   4268:     return $currentstring;
                   4269: }
                   4270: 
1.179     sakharuk 4271: #-- <samp> tag (end tag required)
1.122     albertel 4272: sub start_samp {
                   4273:     my ($target,$token) = @_;
                   4274:     my $currentstring = '';
1.325     albertel 4275:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4276: 	$currentstring = $token->[4];     
1.179     sakharuk 4277:     } elsif ($target eq 'tex') {
                   4278: 	$currentstring='\texttt{';
                   4279:     }
1.122     albertel 4280:     return $currentstring;
                   4281: }
                   4282: 
                   4283: sub end_samp {
                   4284:     my ($target,$token) = @_;
                   4285:     my $currentstring = '';
1.325     albertel 4286:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4287: 	$currentstring = $token->[2];    
1.179     sakharuk 4288:     } elsif ($target eq 'tex') {
                   4289: 	$currentstring='}';
                   4290:     }
1.122     albertel 4291:     return $currentstring;
                   4292: }
                   4293: 
                   4294: #-- <server> tag
                   4295: sub start_server {
                   4296:     my ($target,$token) = @_;
                   4297:     my $currentstring = '';
1.325     albertel 4298:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4299: 	$currentstring = $token->[4];     
                   4300:     } 
                   4301:     return $currentstring;
                   4302: }
                   4303: 
                   4304: sub end_server {
                   4305:     my ($target,$token) = @_;
                   4306:     my $currentstring = '';
1.325     albertel 4307:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4308: 	$currentstring = $token->[2];    
                   4309:     } 
                   4310:     return $currentstring;
                   4311: }
                   4312: 
1.179     sakharuk 4313: #-- <spacer> tag (end tag forbidden)
1.122     albertel 4314: sub start_spacer {
                   4315:     my ($target,$token) = @_;
1.279     foxr     4316:     my $currentstring = &end_p();	# Close off any open <p> tag.
1.325     albertel 4317:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     4318: 	$currentstring .= $token->[4];     
1.122     albertel 4319:     } 
                   4320:     return $currentstring;
                   4321: }
                   4322: 
                   4323: sub end_spacer {
                   4324:     my ($target,$token) = @_;
                   4325:     my $currentstring = '';
1.325     albertel 4326:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4327: 	$currentstring = $token->[2];    
                   4328:     } 
                   4329:     return $currentstring;
                   4330: }
                   4331: 
1.179     sakharuk 4332: #-- <span> tag (end tag required)
1.122     albertel 4333: sub start_span {
                   4334:     my ($target,$token) = @_;
                   4335:     my $currentstring = '';
1.325     albertel 4336:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4337: 	$currentstring = $token->[4];     
                   4338:     } 
                   4339:     return $currentstring;
                   4340: }
                   4341: 
                   4342: sub end_span {
                   4343:     my ($target,$token) = @_;
                   4344:     my $currentstring = '';
1.325     albertel 4345:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4346: 	$currentstring = $token->[2];    
                   4347:     } 
                   4348:     return $currentstring;
                   4349: }
                   4350: 
1.179     sakharuk 4351: #-- <tbody> tag (end tag optional)
1.122     albertel 4352: sub start_tbody {
                   4353:     my ($target,$token) = @_;
                   4354:     my $currentstring = '';
1.325     albertel 4355:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4356: 	$currentstring = $token->[4];     
                   4357:     } 
                   4358:     return $currentstring;
                   4359: }
                   4360: 
                   4361: sub end_tbody {
                   4362:     my ($target,$token) = @_;
                   4363:     my $currentstring = '';
1.325     albertel 4364:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4365: 	$currentstring = $token->[2];    
                   4366:     } 
                   4367:     return $currentstring;
                   4368: }
                   4369: 
1.166     sakharuk 4370: #-- <tfoot> tag (end tag optional)
1.122     albertel 4371: sub start_tfoot {
                   4372:     my ($target,$token) = @_;
                   4373:     my $currentstring = '';
1.325     albertel 4374:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4375: 	$currentstring = $token->[4];     
                   4376:     } 
                   4377:     return $currentstring;
                   4378: }
                   4379: 
                   4380: sub end_tfoot {
                   4381:     my ($target,$token) = @_;
                   4382:     my $currentstring = '';
1.325     albertel 4383:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4384: 	$currentstring = $token->[2];    
                   4385:     } 
                   4386:     return $currentstring;
                   4387: }
                   4388: 
1.166     sakharuk 4389: #-- <thead> tag (end tag optional)
1.122     albertel 4390: sub start_thead {
                   4391:     my ($target,$token) = @_;
                   4392:     my $currentstring = '';
1.325     albertel 4393:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4394: 	$currentstring = $token->[4];     
                   4395:     } 
                   4396:     return $currentstring;
                   4397: }
1.10      www      4398: 
1.122     albertel 4399: sub end_thead {
                   4400:     my ($target,$token) = @_;
                   4401:     my $currentstring = '';
1.325     albertel 4402:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4403: 	$currentstring = $token->[2];    
                   4404:     } 
                   4405:     return $currentstring;
                   4406: }
1.119     www      4407: 
1.122     albertel 4408: #-- <var> tag
                   4409: sub start_var {
1.44      sakharuk 4410:     my ($target,$token) = @_;
                   4411:     my $currentstring = '';
1.325     albertel 4412:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4413: 	$currentstring = $token->[4];     
1.163     sakharuk 4414:     } elsif ($target eq 'tex') {
                   4415: 	$currentstring = '\textit{'; 
                   4416:     }
1.44      sakharuk 4417:     return $currentstring;
                   4418: }
1.10      www      4419: 
1.122     albertel 4420: sub end_var {
                   4421:     my ($target,$token) = @_;
1.44      sakharuk 4422:     my $currentstring = '';
1.325     albertel 4423:     if ($target eq 'web' || $target eq 'webgrade') {
1.163     sakharuk 4424: 	$currentstring = $token->[2];
                   4425:     } elsif ($target eq 'tex') {
                   4426: 	$currentstring = '}'; 
1.44      sakharuk 4427:     } 
                   4428:     return $currentstring;
                   4429: }
1.119     www      4430: 
1.163     sakharuk 4431: #-- <wbr> tag (end tag forbidden)
1.122     albertel 4432: sub start_wbr {
                   4433:     my ($target,$token) = @_;
                   4434:     my $currentstring = '';
1.325     albertel 4435:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4436: 	$currentstring = $token->[4];     
                   4437:     } 
                   4438:     return $currentstring;
1.98      albertel 4439: }
                   4440: 
1.122     albertel 4441: sub end_wbr {
                   4442:     my ($target,$token) = @_;
                   4443:     my $currentstring = '';
1.325     albertel 4444:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4445: 	$currentstring = $token->[2];    
                   4446:     } 
                   4447:     return $currentstring;
1.98      albertel 4448: }
1.134     sakharuk 4449: 
                   4450: #-- <hideweboutput> tag
                   4451: sub start_hideweboutput {
                   4452:     my ($target,$token) = @_;
1.325     albertel 4453:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4454: 	&Apache::lonxml::startredirection();     
                   4455:     } 
                   4456:     return '';
                   4457: }
                   4458: 
                   4459: sub end_hideweboutput {
                   4460:     my ($target,$token) = @_;
                   4461:     my $currentstring = '';
1.325     albertel 4462:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4463: 	$currentstring = &Apache::lonxml::endredirection();    
                   4464:     } 
                   4465:     return '';
                   4466: }
                   4467: 
1.94      sakharuk 4468: 
                   4469: sub image_replication {
                   4470:     my $src = shift;
1.187     albertel 4471:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   4472:     #replicates eps or ps 
                   4473:     my $epssrc = my $pssrc = $src;
                   4474:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   4475:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   4476:     if (not -e $epssrc && not -e $pssrc) {
                   4477: 	my $result=&Apache::lonnet::repcopy($epssrc);
1.264     raeburn  4478: 	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 4479:     }
                   4480:     return '';
1.195     sakharuk 4481: }
1.397     jms      4482: 
                   4483: 
                   4484: 
1.275     foxr     4485: sub resize_image {
                   4486:     my ($height_param, $width_param, $scaling,
                   4487: 	$parstack, $safeeval, $depth, $cis) = @_;
                   4488: 
                   4489:     # First apply the scaling...
1.271     foxr     4490: 
1.275     foxr     4491:     $height_param = $height_param * $scaling;
                   4492:     $width_param  = $width_param  * $scaling;
1.261     foxr     4493: 
1.197     sakharuk 4494:     #do we have any specified LaTeX size of the picture?
1.261     foxr     4495:     my $toget='TeXwidth'; 
                   4496:     if ($cis) { 
                   4497: 	$toget=lc($toget); 
                   4498:     }
1.256     albertel 4499:     my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
                   4500: 					      $safeeval,$depth,$cis);
                   4501:     $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
                   4502:     my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
                   4503: 					       $safeeval,$depth,$cis);
1.197     sakharuk 4504:     #do we have any specified web size of the picture?
                   4505:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
1.256     albertel 4506: 					   $depth,1);
                   4507:     if ($TeXwidth) { 
1.252     matthew  4508: 	my $old_width_param=$width_param;
1.197     sakharuk 4509: 	if ($TeXwidth=~/(\d+)\s*\%/) {
1.267     albertel 4510: 	    $width_param = $1*$env{'form.textwidth'}/100;
1.197     sakharuk 4511: 	} else { 
                   4512: 	    $width_param = $TeXwidth;
                   4513: 	}
1.266     albertel 4514: 	if ($TeXheight) {
                   4515: 	    $height_param = $TeXheight;
                   4516: 	} elsif ($old_width_param) {
                   4517: 	    $height_param=$TeXwidth/$old_width_param*$height_param;
                   4518: 	}
1.256     albertel 4519:     } elsif ($TeXheight) {
1.248     foxr     4520: 	$height_param = $TeXheight;
1.266     albertel 4521: 	if ($height_param) {
                   4522: 	    $width_param  = $TeXheight/$height_param*$width_param;
                   4523: 	}
1.256     albertel 4524:     } elsif ($width) {
1.252     matthew  4525: 	my $old_width_param=$width_param;
1.256     albertel 4526: 	$width_param = $width*$scaling;
1.266     albertel 4527: 	if ($old_width_param) {
                   4528: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4529: 	}
1.252     matthew  4530:     }
1.267     albertel 4531:     if ($width_param > $env{'form.textwidth'}) {
1.252     matthew  4532:         my $old_width_param=$width_param;
1.267     albertel 4533: 	$width_param =0.95*$env{'form.textwidth'};
1.266     albertel 4534: 	if ($old_width_param) {
                   4535: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4536: 	}
1.197     sakharuk 4537:     }
1.275     foxr     4538: 
                   4539:     return ($height_param, $width_param);
                   4540: }
                   4541: 
                   4542: sub image_size {
                   4543:     my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
                   4544: 
                   4545:     #size of image from gif/jpg/jpeg/png 
                   4546:     my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   4547:     if (-e $ressrc) {
                   4548: 	$src = $ressrc;
                   4549:     }
                   4550:     my $image = Image::Magick->new;
                   4551:     my $current_figure = $image->Read($src);
                   4552:     my $width_param = $image->Get('width');
                   4553:     my $height_param = $image->Get('height');
                   4554:     &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
                   4555:     undef($image);
                   4556: 
                   4557:     ($height_param, $width_param) = &resize_image($height_param, $width_param,
                   4558: 						  $scaling, $parstack, $safeeval, 
                   4559: 						  $depth, $cis);
                   4560: 
1.248     foxr     4561:     return ($height_param, $width_param);
                   4562: }
                   4563: 
                   4564: sub image_width {
                   4565:     my ($height, $width) = &image_size(@_);
                   4566:     return $width;
                   4567: }
                   4568: #  Not yet 100% sure this is correct in all circumstances..
                   4569: #  due to my uncertainty about mods to image_size.
                   4570: #
                   4571: sub image_height {
                   4572:     my ($height, $width) = &image_size(@_);
                   4573:     return $height;
1.197     sakharuk 4574: }
                   4575: 
1.256     albertel 4576: sub get_eps_image {
                   4577:     my ($src)=@_;
1.261     foxr     4578:     my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
1.285     foxr     4579: 
                   4580:     # In order to prevent the substitution of the alt text, we need to
                   4581:     # be sure the orig_src file is on system now so:
                   4582: 
                   4583:     if (! -e $orig_src) {
                   4584: 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
                   4585:     }
1.275     foxr     4586:     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
1.390     foxr     4587:     my ($spath, $sname, $sext) = &fileparse($src, qr/\.(bmp|gif|png|jpg|jpeg)/i);
                   4588:     $src=~s/\.(bmp|gif|png|jpg|jpeg)$/\.eps/i;
1.256     albertel 4589:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.275     foxr     4590:     &Apache::lonxml::debug("Filelocation gives: $src");
1.256     albertel 4591:     if (! -e $src) {
1.261     foxr     4592: 	&Apache::lonxml::debug("$src does not exist");
1.264     raeburn  4593: 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
1.261     foxr     4594: 	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
1.256     albertel 4595: 	    #if replication failed try to find ps file
                   4596: 	    $src=~s/\.eps$/\.ps/;
1.261     foxr     4597: 	    &Apache::lonxml::debug("Now looking for $src");
1.270     foxr     4598: 	    #if no ps file try to replicate it.
                   4599: 	    my $didrepcopy = &Apache::lonnet::repcopy($src);
                   4600: 	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
                   4601: 	    if ( (not -e $src) ||
                   4602: 		($didrepcopy ne 'ok')) {
1.261     foxr     4603: 		&Apache::lonxml::debug("Failed to find or replicate $src");
                   4604: 
1.256     albertel 4605: 		#if replication failed try to produce eps file dynamically
                   4606: 		$src=~s/\.ps$/\.eps/;
                   4607: 		my $temp_file;
1.267     albertel 4608: 		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.256     albertel 4609: 		my $newsrc=$orig_src;
                   4610: 		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
1.275     foxr     4611: 		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
1.344     albertel 4612: 		print FILE ("$newsrc\n");
                   4613: 		close(FILE);
1.256     albertel 4614: 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4615: 		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.283     albertel 4616: 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
                   4617: 		    $src =~ s/\.eps$/$sext.eps/;
                   4618: 		}
1.341     foxr     4619: 
1.256     albertel 4620: 	    }
1.343     foxr     4621: 
1.256     albertel 4622: 	}
1.341     foxr     4623:     } else {
                   4624: 	# If the postscript file has spaces in its name,
                   4625: 	# LaTeX will gratuitiously vomit.  Therefore
                   4626: 	# queue such files for copy with " " replaced by "_".
                   4627: 	# printout.pm will know them by their .ps  or .eps extensions.
                   4628: 	my $newsrc = $orig_src;
                   4629: 	$newsrc    =~  s|(.*)/res/|/home/httpd/html/res/|;
                   4630: 	open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.343     foxr     4631: 	print FILE "$src\n";
1.341     foxr     4632: 	close FILE;
                   4633: 	$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4634: 	$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.256     albertel 4635:     }
                   4636:     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
1.344     albertel 4637:     $path =~ s/ /\_/g;
1.343     foxr     4638:     $file =~ s/ /\_/g;
1.261     foxr     4639:     &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
1.256     albertel 4640:     return ($path.'/',$file);
                   4641: }
                   4642: 
1.195     sakharuk 4643: sub eps_generation {
                   4644:     my ($src,$file,$width_param) = @_;	     
1.267     albertel 4645:     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
1.195     sakharuk 4646:     my $temp_file = Apache::File->new('>>'.$filename); 
                   4647:     print $temp_file "$src\n";
                   4648:     my $newsrc = $src;
1.390     foxr     4649:     $newsrc =~ s/(\.bmp|\.gif|\.jpg|\.jpeg)$/\.eps/i;
1.345     albertel 4650:     $newsrc=~s{/home/httpd/html/res}{};
                   4651:     $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
                   4652:     $newsrc=~s{/\./}{/};
                   4653:     $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
                   4654:     if ($newsrc=~m{/home/httpd/lonUsers/}) {
                   4655: 	$newsrc=~s{/home/httpd/lonUsers}{};
                   4656: 	$newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
1.213     sakharuk 4657:     }
1.345     albertel 4658:     if ($newsrc=~m{/userfiles/}) {
1.239     sakharuk 4659: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4660:     } else {
                   4661: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4662:     }
1.197     sakharuk 4663: }
                   4664: 
                   4665: sub file_path {     
                   4666:     my $src=shift;
                   4667:     my ($file,$path); 
                   4668:     if ($src =~ m!(.*)/([^/]*)$!) {
                   4669: 	$file = $2; 
                   4670: 	$path = $1.'/'; 
                   4671:     } 
                   4672:     return $file,$path;
1.126     sakharuk 4673: }
1.397     jms      4674: 
                   4675: 
1.126     sakharuk 4676: sub recalc {
                   4677:     my $argument = shift;
                   4678:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 4679:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 4680:     my $value=$1;
                   4681:     my $units=$2;
                   4682:     if ($units eq 'cm') {
                   4683: 	$value*=10;
                   4684:     } elsif ($units eq 'in') {
                   4685: 	$value*=25.4;
                   4686:     } elsif ($units eq 'pc') {
                   4687: 	$value*=(25.4*12/72.27);
                   4688:     } elsif ($units eq 'pt') {
                   4689: 	$value*=(25.4/72.27);
                   4690:     }
                   4691:     return $value.' mm';
1.94      sakharuk 4692: }
1.184     sakharuk 4693: 
                   4694: sub LATEX_length {
                   4695:     my $garbage=shift;
1.206     sakharuk 4696:     $garbage=~s/^\s+$//;
                   4697:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   4698:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   4699:     $garbage=~s/(\s)+/$1/;#only one space
                   4700:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   4701:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   4702:     $garbage=~s/([^\\])\$/$1/g;#$
                   4703:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   4704:    $garbage=~s/(\\alpha|\\beta|\\gamma|\\delta|\\epsilon|\\verepsilon|\\zeta|\\eta|\\theta|\\vartheta|\\iota|\\kappa|\\lambda|\\mu|\\nu|\\xi|\\pi|\\varpi|\\rho|\\varrho|\\sigma|\\varsigma|\\tau|\\upsilon|\\phi|\\varphi|\\chi|\\psi|\\omega|\\Gamma|\\Delta|\\Theta|\\Lambda|\\Xi|\\Pi|\\Sigma|\\Upsilon|\\Phi|\\Psi|\\Omega)/1/g;
1.184     sakharuk 4705:     $garbage=~s/(\\pm|\\mp|\\times|\\div|\\cdot|\\ast|\\star|\\dagger|\\ddagger|\\amalg|\\cap|\\cup|\\uplus|\\sqcap|\\sqcup|\\vee|\\wedge|\\oplus|\\ominus|\\otimes|\\circ|\\bullet|\\diamond|\\lhd|\\rhd|\\unlhd|\\unrhd|\\oslash|\\odot|\\bigcirc|\\Box|\\Diamond|\\bigtriangleup|\\bigtriangledown|\\triangleleft|\\triangleright|\\setminus|\\wr)/1/g;
                   4706:     $garbage=~s/(\\le|\\ll|\\leq|\\ge|\\geq|\\gg|\\neq|\\doreq|\\sim|\\simeq|\\subset|\\subseteq|\\sqsubset|\\sqsubseteq|\\in|\\vdash|\\models|\\supset|\\supseteq|\\sqsupset|\\sqsupseteq|\\ni|\\dash|\\perp|\\approx|\\cong|\\equiv|\\propto|\\prec|\\preceq|\\parallel|\\asymp|\\smile|\\frown|\\bowtie|\\succ|\\succeq|\\mid)/1/g;
                   4707:     $garbage=~s/(\\not<|\\\\not\\le|\\not\\prec|\\not\\preceq|\\not\\subset|\\not\\subseteq|\\not\\sqsubseteq|\\not\\in|\\not>|\\not\\ge|\\not\\succ|\\notsucceq|\\not\\supset|\\notsupseteq|\\not\\sqsupseteq|\\notin|\\not=|\\not\\equiv|\\not\\sim|\\not\\simeq|\\not\\approx|\\not\\cong|\\not\\asymp)/1/g;
1.206     sakharuk 4708:     $garbage=~s/(\\leftarrow|\\gets|\\Leftarrow|\\rightarrow|\\to|\\Rightarrow|\\leftrightarrow|\\Leftrightarrow|\\mapsto|\\hookleftarrow|\\leftharpoonup|\\leftkarpoondown|\\rightleftharpoons|\\longleftarrow|\\Longleftarrow|\\longrightarrow|\\Longrightarrow|\\longleftrightarrow|\\Longleftrightarrow|\\longmapsto|\\hookrightarrow|\\rightharpoonup|\\rightharpoondown|\\uparrow|\\Uparrow|\\downarrow|\\Downarrow|\\updownarrow|\\Updownarrow|\\nearrow|\\searrow|\\swarrow|\\nwarrow)/11/g;
                   4709:     $garbage=~s/(\\aleph|\\hbar|\\imath|\\jmath|\\ell|\\wp|\\Re|\\Im|\\mho|\\prime|\\emptyset|\\nabla|\\surd|\\partial|\\top|\\bot|\\vdash|\\dashv|\\forall|\\exists|\\neg|\\flat|\\natural|\\sharp|\\\||\\angle|\\backslash|\\Box|\\Diamond|\\triangle|\\clubsuit|\\diamondsuit|\\heartsuit|\\spadesuit|\\Join|\\infty)/11/g;
                   4710:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   4711:     #remove some other LaTeX command
                   4712:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   4713:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   4714:     $garbage=~s|\+|11|g;
1.184     sakharuk 4715:     my  $value=length($garbage);
                   4716:     return $value;
                   4717: }
                   4718: 
1.397     jms      4719: 
1.353     foxr     4720: sub align_latex_image {
                   4721:     my ($align, $latex_rendering, $image, $width, $height) = @_;
1.354     foxr     4722:     my $currentstring;        # The 1/2 wrapped image.
                   4723:     my $closure;              # The closure of the wrappage.
1.379     albertel 4724: 
                   4725:     # if it's none just return it back
                   4726:     if ($latex_rendering eq 'none') {
                   4727: 	return ($image,'');
                   4728:     }
                   4729: 
1.353     foxr     4730:     #    If there's an alignment specification we need to honor it here.
                   4731:     #    For the horizontal alignments, we will also honor the
                   4732:     #    value of the latex specfication.  The default is parbox,
                   4733:     #    and that's used for illegal values too.  
                   4734:     #    
                   4735:     #    Even though we set a default alignment value, the user
                   4736:     #    could have given us an illegal value.  In that case we
                   4737:     #    just use the default alignment of bottom..
1.354     foxr     4738:     $currentstring = "\n% figurewrapping \n";
1.353     foxr     4739:     if      ($align eq "top")    {
1.354     foxr     4740: 	$currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
                   4741: 	$closure = '}';
1.353     foxr     4742:     } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
                   4743: 	my $offset = $height/2;
1.354     foxr     4744: 	$currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
                   4745: 	$closure       = '}';
1.353     foxr     4746:     } elsif ($align eq "left")   { 
                   4747: 	if ($latex_rendering eq "parpic") { 
1.354     foxr     4748: 	    $currentstring .= '\parpic[l]{'.$image;
                   4749: 	    $closure       = '}';
1.353     foxr     4750: 	} elsif ($latex_rendering eq "parbox") {
1.354     foxr     4751: 	    $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
                   4752: 		.$image;
                   4753: 	    $closure = '\end{minipage}';
1.353     foxr     4754: 	} elsif ($latex_rendering eq "wrapfigure"
                   4755: 		 || $latex_rendering ne 'none') {  # wrapfig render
1.354     foxr     4756: 	    $currentstring .= 
1.353     foxr     4757: 		'\begin{wrapfigure}{l}{'.$width.'mm}'
1.354     foxr     4758: 		.'\scalebox{1.0}{'.$image;
                   4759: 	    $closure = '}\end{wrapfigure}';
1.353     foxr     4760: 	}
                   4761:     } elsif ($align eq "right")  {   
                   4762: 	if ($latex_rendering eq "parpic") {
1.354     foxr     4763: 	    $currentstring .= '\parpic[r]{'.$image;
                   4764: 	    $closure = '}';
1.353     foxr     4765: 	} elsif ($latex_rendering eq "parbox") {
1.354     foxr     4766: 	    $currentstring .=  '\begin{minipage}[r]{'.$width.'mm}'
                   4767: 		.$image;
                   4768: 	    $closure = '\end{minipage}';
1.353     foxr     4769: 	} elsif ($latex_rendering eq "wrapfigure"
                   4770: 		 || $latex_rendering ne 'none') {  # wrapfig render
1.354     foxr     4771: 	    $currentstring .= 
1.353     foxr     4772: 		'\begin{wrapfigure}{r}{'.$width.'mm}'
1.354     foxr     4773: 		.'\scalebox{1.0}{'.$image;
                   4774: 	    $closure = '}\end{wrapfigure}';
1.353     foxr     4775: 	}
                   4776:     } else {		# Bottom is also default.
                   4777: 	# $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
1.354     foxr     4778: 	$currentstring .= "{$image";
                   4779: 	$closure       = '}';
1.353     foxr     4780:     }
1.354     foxr     4781:     $currentstring .= "\n% end wrappage\n";
                   4782:     $closure        = "\n% Begin closure\n".$closure."\n% End closure\n";
                   4783:     return ($currentstring, $closure);
1.353     foxr     4784: }
1.184     sakharuk 4785: 
1.397     jms      4786: 
1.287     foxr     4787: sub is_inside_of {
                   4788:     my ($tagstack, $tag) = @_;
                   4789:     my @stack = @$tagstack;
                   4790:     for (my $i = ($#stack - 1); $i >= 0; $i--) {
                   4791: 	if ($stack[$i] eq $tag) {
                   4792: 	    return 1;
                   4793: 	}
                   4794:     }
                   4795:     return 0;
                   4796: }
1.184     sakharuk 4797: 
1.94      sakharuk 4798: 
1.397     jms      4799: =pod
                   4800: 
                   4801: =head1 NAME
                   4802: 
                   4803: Apache::londefdef.pm
                   4804: 
                   4805: =head1 SYNOPSIS
                   4806: 
                   4807: Tags Default Definition Module
                   4808: 
                   4809: This is part of the LearningOnline Network with CAPA project
                   4810: described at http://www.lon-capa.org.
                   4811: 
                   4812: 
                   4813: =head1 NOTABLE SUBROUTINES
                   4814: 
                   4815: =over
                   4816: 
                   4817: =item start_hideweboutput()
                   4818: 
                   4819: =item end_hideweboutput()
                   4820: 
                   4821: =item image_replication()
                   4822: 
                   4823: =item resize_image()
                   4824: 
                   4825: 	Get correct sizing parameter for an image given
                   4826: 	it's initial ht. and wid.  This allows sizing of
                   4827: 	images that are generated on-the-fly (e.g. gnuplot)
                   4828: 	as well as serving as a utility for image_size.
                   4829:  
                   4830: 	Parameter:
                   4831:         height_param
                   4832:         width_param    - Initial picture dimensions.
                   4833:         scaling        - A scale factor.
                   4834:         parstack,      - the current stack of tag attributes 
                   4835:                          from the xml parser
                   4836:         safeeval,      - pointer to the safespace
                   4837:         depth,         - from what level in the stack to look for attributes
                   4838:                          (assumes -1 if unspecified)
                   4839:         cis            - look for attrubutes case insensitively
                   4840:                          (assumes false)
                   4841: 
                   4842: 	Returns:
                   4843: 		height, width   - new dimensions.
                   4844: 
                   4845: =item image_size()
                   4846: 
                   4847: =item image_width()
                   4848: 
                   4849: =item image_height()
                   4850: 
                   4851: =item get_eps_image()
                   4852: 
                   4853: =item eps_generation()
                   4854: 
                   4855: =item file_path()
                   4856: 
                   4857: =item recalc()
                   4858: 
                   4859: 	Converts a measurement in to mm from any of 
                   4860: 	the other valid LaTeX units of measure.
                   4861: 	If the units of measure are missing from the 
                   4862: 	parameter, it is assumed to be in and returned
                   4863: 	with mm units of measure
                   4864: 
                   4865: =item LATEX_length()
                   4866: 
                   4867: =item align_latex_image()
                   4868: 
                   4869:   	Wrap image 'stuff' inside of the LaTeX required to implement 
                   4870:    	alignment:
                   4871:      	align_tex_image(align, latex_rendering, image)
                   4872:    	Where:
                   4873:      	align   - The HTML alignment specification.
                   4874:      	latex_rendering - rendering hint for latex.
                   4875:      	image   - The LaTeX needed to insert the image itsef.
                   4876:      	width,height - dimensions of the image.
                   4877:  	Returns:
                   4878:     	The 1/2 wrapped image and the stuff required to close the
                   4879:     	wrappage.  This allows e.g. randomlabel to insert more stuff
                   4880:     	into the closure.
                   4881: 
                   4882: 
                   4883: =item is_inside_of($tagstack, $tag)
                   4884:    	This sub returns true if the current state of Xml processing is inside of the tag.   
                   4885: 	Parameters:
                   4886:     	tagstack   - The tagstack from the parser.
                   4887:     	tag        - The tag (without the <>'s.).
                   4888: 	Sample usage:
                   4889:     	if (is_inside_of($tagstack "table")) {
                   4890:      	   I'm in a table....
                   4891:      	}
                   4892: 
                   4893: 
                   4894: 
                   4895: =back
                   4896: 
                   4897: =cut
                   4898: 
                   4899: 
1.1       sakharuk 4900: 1;
                   4901: __END__

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