Annotation of loncom/xml/londefdef.pm, revision 1.345

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.345   ! albertel    4: # $Id: londefdef.pm,v 1.344 2006/11/07 02:39:39 albertel 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;
1.57      sakharuk   45: use Apache::File();
1.70      sakharuk   46: use Image::Magick;
1.118     www        47: use Apache::lonmenu();
                     48: use Apache::lonmeta();
1.187     albertel   49: use Apache::Constants qw(:common);
1.282     foxr       50: use File::Basename;
1.345   ! albertel   51: use LONCAPA();
1.302     foxr       52: # use Data::Dumper;
1.160     sakharuk   53: 
1.38      harris41   54: BEGIN {
1.15      sakharuk   55: 
1.135     sakharuk   56:     &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   57: 
1.188     albertel   58: }
                     59: 
1.294     foxr       60: #
                     61: #   Dumps all elements of the table structure.
                     62: #   Need this 'cause evidently when given an array, Data::Dumper only seems
                     63: #   to dump element 0.
                     64: #
1.302     foxr       65: #sub debug_dump_table {
                     66: #    my $lastrow = $#Apache::londefdef::table;
                     67: #    &Apache::lonnet::logthis("Dumping table:  Last row index: $lastrow");
                     68: #    my $row;
                     69: #    for ($row =0; $row <= $lastrow; $row++ ) {
                     70: #	my $text = Dumper($Apache::londefdef::table[$row]);
                     71: #	&Apache::lonnet::logthis("table [ $row ]".$text);
                     72: #    }
                     73: #}
1.188     albertel   74: sub initialize_londefdef {
                     75:     $Apache::londefdef::TD_redirection=0;
                     76:     @Apache::londefdef::table = ();
                     77:     $Apache::londefdef::select=0;
1.243     albertel   78:     undef(@Apache::londefdef::description);
                     79:     @Apache::londefdef::DD=(0);
                     80:     @Apache::londefdef::DT=(0);
1.244     albertel   81:     @Apache::londefdef::seenDT=(0);
1.238     albertel   82:     $Apache::londefdef::list_index=0;
1.327     albertel   83:     undef($Apache::londefdef::head);
                     84:     undef($Apache::londefdef::title);
1.3       sakharuk   85: }
1.1       sakharuk   86: 
1.35      sakharuk   87: #======================= TAG SUBROUTINES =====================
1.8       sakharuk   88: #-- <output>
1.21      albertel   89: sub start_output {
1.122     albertel   90:     my ($target) = @_;
                     91:     if ($target eq 'meta') { $Apache::lonxml::metamode--; }
                     92:     return '';
1.21      albertel   93: }
                     94: sub end_output {
1.122     albertel   95:     my ($target) = @_;
                     96:     if ($target eq 'meta') { $Apache::lonxml::metamode++; }
                     97:     return '';
1.21      albertel   98: }
1.4       sakharuk   99: #-- <m> tag
1.33      albertel  100: sub start_m {
1.190     albertel  101:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  102:     my $currentstring = '';
1.193     albertel  103:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
1.191     albertel  104:     if ($target eq 'web' || $target eq 'analyze') {
1.122     albertel  105: 	&Apache::lonxml::debug("M is starting with:$inside:");
                    106: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    107: 	if ($eval eq 'on') {
                    108: 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
                    109: 	    #&Apache::lonxml::debug("M is evaulated to:$inside:");
                    110: 	}
1.317     albertel  111: 	my $tex = $inside;
1.276     albertel  112: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                    113: 	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
1.122     albertel  114: 	if ($Apache::lontexconvert::errorstring) {
1.317     albertel  115: 	    my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
                    116: 	    $tex = &HTML::Entities::encode($tex,'<>&"');
                    117: 	    my ($linenumber) =
                    118: 		($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
                    119: 	    if (defined($linenumber)) {
                    120: 		my @tex=split("\n",$tex);
                    121: 		$tex[$linenumber]='<b><font color="red">'.
                    122: 		    $tex[$linenumber].'</font></b>';
                    123: 		$tex=join("\n",@tex);
                    124: 	    }
                    125: 	    &Apache::lonxml::warning($errormsg.$tex.'</pre>');
1.122     albertel  126: 	    $Apache::lontexconvert::errorstring='';
                    127: 	}
                    128: 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
1.178     albertel  129: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  130:     } elsif ($target eq 'tex') {
1.190     albertel  131: 	$currentstring = $inside;
1.178     albertel  132: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    133: 	if ($eval eq 'on') {
                    134: 	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
                    135: 	}
1.122     albertel  136: 	if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
1.257     albertel  137: 	# detect simple math mode entry exits, and convert them
                    138:         # to use \ensuremath
                    139: 	if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
1.293     albertel  140: 	    $currentstring=~s/^(\s*)\$/$1/;
                    141: 	    $currentstring=~s/\$(\s*)$/$1/;
1.257     albertel  142: 	    $currentstring='\ensuremath{'.$currentstring.'}';
                    143: 	}
1.178     albertel  144: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  145:     }
                    146:     return $currentstring;
1.33      albertel  147: }
1.122     albertel  148: 
1.33      albertel  149: sub end_m {
1.122     albertel  150:     my ($target,$token) = @_;
                    151:     my $currentstring = '';
1.204     albertel  152:     if ($target eq 'tex') {
1.122     albertel  153: 	$currentstring = "";
                    154:     }
                    155:     return $currentstring;
1.33      albertel  156: }
1.110     albertel  157: 
                    158: sub start_tthoption {
1.299     albertel  159:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  160:     my $result;
1.325     albertel  161:     if ($target eq 'web' || $target eq 'webgrade') {
1.299     albertel  162: 	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
                    163: 						   $style);
1.122     albertel  164: 	$inside=~s/^\s*//;
1.267     albertel  165: 	if ($env{'browser.mathml'}) {
1.122     albertel  166: 	    &tth::ttmoptions($inside);
                    167: 	} else {
                    168: 	    &tth::tthoptions($inside);
                    169: 	}
                    170:     }
                    171:     return $result;
1.110     albertel  172: }
                    173: 
                    174: sub end_tthoption {
1.122     albertel  175:     my ($target,$token) = @_;
                    176:     my $result;
                    177:     return $result;
1.110     albertel  178: }
                    179: 
1.181     sakharuk  180: #-- <html> tag (end tag optional)
1.100     albertel  181: sub start_html {
                    182:     my ($target,$token) = @_;
                    183:     my $currentstring = '';
1.269     albertel  184:     if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
1.327     albertel  185: 	# start_body() takes care of emitting the <html> 
1.100     albertel  186:     } elsif ($target eq 'tex') {
1.331     albertel  187: 	$currentstring .= 
                    188: 	    '\documentclass[letterpaper,twoside]{article}\raggedbottom';
1.267     albertel  189: 	if (($env{'form.latex_type'}=~'batchmode') ||
                    190:             (!$env{'request.role.adv'})) {$currentstring .='\batchmode';} 
1.217     sakharuk  191: 	$currentstring .= '\newcommand{\keephidden}[1]{}'.
                    192:                           '\renewcommand{\deg}{$^{\circ}$}'.
1.306     foxr      193: 			  '\usepackage{multirow}'.
1.217     sakharuk  194:                           '\usepackage{longtable}'.
                    195:                           '\usepackage{textcomp}'.
                    196:                           '\usepackage{makeidx}'.
                    197:                           '\usepackage[dvips]{graphicx}'.
1.286     foxr      198: 			  '\usepackage{wrapfig}'.
1.248     foxr      199: 			  '\usepackage{picins}'.
1.217     sakharuk  200:                           '\usepackage{epsfig}'.
                    201:                           '\usepackage{calc}'.
                    202:                           '\usepackage{amsmath}'.
                    203:                           '\usepackage{amssymb}'.
                    204:                           '\usepackage{amsfonts}'.
                    205:                           '\usepackage{amsthm}'.
                    206:                           '\usepackage{amscd}'.
                    207:                           '\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}}'.
                    208:                           '\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  209:     }
                    210:     return $currentstring;
                    211: }
1.122     albertel  212: 
                    213: sub end_html {
1.232     sakharuk  214:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  215:     my $currentstring = '';
1.324     albertel  216:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  217: 	# end_body takes care of the </html>
1.122     albertel  218:     }
                    219:     return $currentstring;
                    220: }
                    221: 
1.181     sakharuk  222: #-- <head> tag (end tag optional)
1.122     albertel  223: sub start_head {
                    224:     my ($target,$token) = @_;
                    225:     my $currentstring = '';
1.324     albertel  226:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  227: 	&Apache::lonxml::startredirection();
1.122     albertel  228:     } 
                    229:     return $currentstring;
                    230: }
                    231: 
                    232: sub end_head {
                    233:     my ($target,$token) = @_;
                    234:     my $currentstring = '';
1.324     albertel  235:     if (($target eq 'web'      && $env{'request.state'} eq 'published') ||
                    236: 	($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
1.327     albertel  237: 	# in case there is a </head> but no <head>
                    238: 	if ($Apache::lonxml::redirection) {
                    239: 	    $Apache::londefdef::head = &Apache::lonxml::endredirection();
                    240: 	}
1.122     albertel  241:     } 
                    242:     return $currentstring;
                    243: }
                    244: 
1.181     sakharuk  245: #-- <map> tag (end tag required)
1.122     albertel  246: sub start_map {
                    247:     my ($target,$token) = @_;
                    248:     my $currentstring = '';
1.325     albertel  249:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  250: 	$currentstring = $token->[4];     
                    251:     } 
                    252:     return $currentstring;
                    253: }
                    254: 
                    255: sub end_map {
                    256:     my ($target,$token) = @_;
                    257:     my $currentstring = '';
1.325     albertel  258:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  259: 	$currentstring = $token->[2];    
                    260:     } 
                    261:     return $currentstring;
                    262: }
                    263: 
1.181     sakharuk  264: #-- <select> tag (end tag required)
1.122     albertel  265: sub start_select {
                    266:     my ($target,$token) = @_;
                    267:     my $currentstring = '';
1.325     albertel  268:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  269: 	$currentstring = $token->[4];     
1.181     sakharuk  270:     }  elsif ($target eq 'tex') {
                    271: 	$Apache::londefdef::select=0;
                    272:     }
1.122     albertel  273:     return $currentstring;
                    274: }
                    275: 
                    276: sub end_select {
                    277:     my ($target,$token) = @_;
                    278:     my $currentstring = '';
1.325     albertel  279:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  280: 	$currentstring = $token->[2];    
                    281:     } 
                    282:     return $currentstring;
                    283: }
                    284: 
1.181     sakharuk  285: #-- <option> tag (end tag optional)
1.122     albertel  286: sub start_option {
1.181     sakharuk  287:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  288:     my $currentstring = '';
1.325     albertel  289:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  290: 	$currentstring = $token->[4];     
1.181     sakharuk  291:     } elsif ($target eq 'tex') {
                    292: 	$Apache::londefdef::select++;
                    293: 	if ($Apache::londefdef::select == 1) {
                    294: 	    $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
                    295: 	} else {
                    296: 	    $currentstring='\keephidden{';
                    297: 	}
                    298:     }
1.122     albertel  299:     return $currentstring;
                    300: }
                    301: 
                    302: sub end_option {
                    303:     my ($target,$token) = @_;
                    304:     my $currentstring = '';
1.325     albertel  305:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  306: 	$currentstring = $token->[2];    
1.181     sakharuk  307:     }  elsif ($target eq 'tex') {
                    308: 	$currentstring='}';
                    309:     }
1.122     albertel  310:     return $currentstring;
                    311: }
                    312: 
1.181     sakharuk  313: #-- <input> tag (end tag forbidden)
1.122     albertel  314: sub start_input {
                    315:     my ($target,$token) = @_;
                    316:     my $currentstring = '';
1.325     albertel  317:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  318: 	$currentstring = $token->[4];     
                    319:     } 
                    320:     return $currentstring;
                    321: }
                    322: 
                    323: sub end_input {
                    324:     my ($target,$token) = @_;
                    325:     my $currentstring = '';
1.325     albertel  326:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  327: 	$currentstring = $token->[2];    
                    328:     } 
                    329:     return $currentstring;
                    330: }
                    331: 
1.181     sakharuk  332: #-- <textarea> tag (end tag required)
1.122     albertel  333: sub start_textarea {
                    334:     my ($target,$token) = @_;
                    335:     my $currentstring = '';
1.325     albertel  336:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  337: 	$currentstring = $token->[4];     
                    338:     } 
                    339:     return $currentstring;
                    340: }
                    341: 
                    342: sub end_textarea {
                    343:     my ($target,$token) = @_;
                    344:     my $currentstring = '';
1.325     albertel  345:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  346: 	$currentstring = $token->[2];    
                    347:     } 
                    348:     return $currentstring;
                    349: }
                    350: 
1.181     sakharuk  351: #-- <form> tag (end tag required)
1.122     albertel  352: sub start_form {
                    353:     my ($target,$token) = @_;
                    354:     my $currentstring = '';
1.325     albertel  355:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  356: 	$currentstring = $token->[4];     
                    357:     } 
                    358:     return $currentstring;
                    359: }
                    360: 
                    361: sub end_form {
                    362:     my ($target,$token) = @_;
                    363:     my $currentstring = '';
1.325     albertel  364:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  365: 	$currentstring = $token->[2];    
                    366:     } 
                    367:     return $currentstring;
                    368: }
                    369: 
1.181     sakharuk  370: #-- <title> tag (end tag required)
1.122     albertel  371: sub start_title {
1.327     albertel  372:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  373:     my $currentstring = '';
1.324     albertel  374:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  375: 	$Apache::londefdef::title = 
                    376: 	    &Apache::lonxml::get_all_text('/title',$parser,$style);
1.122     albertel  377:     } elsif ($target eq 'tex') {
1.166     sakharuk  378: 	$currentstring .= '\keephidden{Title of the document:  ' 
1.122     albertel  379:     }
                    380:     if ($target eq 'meta') {
                    381: 	$currentstring='<title>';
1.185     albertel  382: 	&start_output($target);
1.122     albertel  383:     }
                    384:     return $currentstring;
                    385: }
                    386: 
                    387: sub end_title {
                    388:     my ($target,$token) = @_;
                    389:     my $currentstring = '';
1.324     albertel  390:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  391: 	# start_title takes care of swallowing the title
1.122     albertel  392:     } elsif ($target eq 'tex') {
                    393: 	$currentstring .= '}';
                    394:     }  
                    395:     if ($target eq 'meta') {
1.185     albertel  396: 	&end_output($target);
1.122     albertel  397: 	$currentstring='</title>';
                    398:     } 
                    399:     return $currentstring;
                    400: }
                    401: 
1.181     sakharuk  402: #-- <meta> tag (end tag forbidden)
1.122     albertel  403: sub start_meta {
1.299     albertel  404:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  405:     my $currentstring = '';
1.325     albertel  406:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  407: 	my $args='';
                    408: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    409: 	if ($args eq '') {
1.299     albertel  410: 	    &Apache::lonxml::get_all_text("/meta",$parser,$style);
1.122     albertel  411: 	} else {
                    412: 	    $currentstring = $token->[4];
1.1       sakharuk  413: 	}
1.135     sakharuk  414:     } elsif ($target eq 'meta') {
1.122     albertel  415: 	unless (&Apache::lonxml::get_param
                    416: 		('http-equiv',$parstack,$safeeval,undef,1)) {
                    417: 	    my $name=$token->[2]->{'name'};
                    418: 	    $name=~tr/A-Z/a-z/;
                    419: 	    $name=~s/\s/\_/gs;
                    420: 	    $name=~s/\W//gs;
                    421: 	    if ($name) {
1.154     www       422: 		$currentstring='<'.$name;
                    423:                  my $display=&Apache::lonxml::get_param
                    424: 		('display',$parstack,$safeeval,undef,1);
                    425:                 if ($display) {
                    426:                     $display=~s/\"/\'/g;
                    427: 		    $currentstring.=' display="'.$display.'"';
                    428:                 }
                    429: 		$currentstring.='>'.
1.122     albertel  430: 		    &Apache::lonxml::get_param
                    431: 			('content',$parstack,$safeeval,undef,1).
1.135     sakharuk  432: 			'</'.$name.'>';
1.1       sakharuk  433: 	    }
1.154     www       434:             my $display=&Apache::lonxml::get_param
                    435: 		('display',$parstack,$safeeval,undef,1);
                    436:             if ($display) {
1.204     albertel  437: 		$display=&HTML::Entities::encode($display,'<>&"');
1.154     www       438: 		$currentstring.='<'.$name.'.display>'.$display.
                    439:                                '</'.$name.'.display>';
                    440:             }
1.1       sakharuk  441: 	}
1.135     sakharuk  442:     } elsif ($target eq 'tex') {
1.151     sakharuk  443: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    444: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
                    445: 	if ((not defined $content) && (not defined $name)) {
                    446: 	    &Apache::lonxml::startredirection();
                    447: 	}
1.122     albertel  448:     }
                    449:     return $currentstring;
                    450: }
                    451: 
                    452: sub end_meta {
1.165     albertel  453:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  454:     my $currentstring = '';
1.325     albertel  455:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  456: 	my $args='';
                    457: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    458: 	if ($args ne '') {
1.121     www       459: 	    $currentstring = $token->[4];
1.122     albertel  460: 	}
1.135     sakharuk  461:     } elsif ($target eq 'tex') {
1.165     albertel  462: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    463: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
1.164     albertel  464: 	if ((not defined $content) && (not defined $name)) {
1.169     albertel  465: 	    &Apache::lonxml::endredirection();
1.164     albertel  466: 	}
1.135     sakharuk  467:     }
1.122     albertel  468:     return $currentstring;
                    469: }
                    470: 
1.121     www       471: # accessrule
1.122     albertel  472: sub start_accessrule {
1.299     albertel  473:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  474:     my $currentstring = '';
                    475:     my $eff=&Apache::lonxml::get_param
                    476: 	('effect',$parstack,$safeeval,undef,1);
                    477:     my $realm=&Apache::lonxml::get_param
                    478: 	('realm',$parstack,$safeeval,undef,1);
1.123     www       479:     my $role=&Apache::lonxml::get_param
                    480: 	('role',$parstack,$safeeval,undef,1);
                    481:     $realm=~s/\s+//g;
                    482:     $realm=~s/\//\_/g;
                    483:     $realm=~s/^\_//;
                    484:     $realm=~s/\W/\;/g;
                    485:     $role=~s/\s+//g;
                    486:     $role=~s/\//\_/g;
                    487:     $role=~s/\W/\;/g;
1.122     albertel  488:     if ($target eq 'web') {
                    489: 	my $args='';
                    490: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    491: 	if ($args eq '') {
1.299     albertel  492: 	    &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
1.122     albertel  493: 	} else {
                    494: 	    $currentstring = $token->[4];
                    495: 	}
                    496:     }
                    497:     if ($target eq 'meta') {
1.123     www       498: 	$currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
1.122     albertel  499:     }
                    500:     return $currentstring;
                    501: }
                    502: 
                    503: sub end_accessrule {
                    504:     my ($target,$token,$tagstack,$parstack,$parser) = @_;
                    505:     my $currentstring = '';
                    506:     if ($target eq 'web') {
                    507: 	my $args='';
                    508: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    509: 	if ($args ne '') {
                    510: 	    $currentstring = $token->[4];
                    511: 	}
                    512:     } 
                    513:     return $currentstring;
                    514: }
                    515: 
1.181     sakharuk  516: #-- <body> tag (end tag required)
1.122     albertel  517: sub start_body {
                    518:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    519:     my $currentstring = '';
1.244     albertel  520: 
1.324     albertel  521:     if ($target eq 'web' || $target eq 'webgrade') {
1.170     albertel  522: 	if ($Apache::lonhomework::parsing_a_problem) {
                    523: 	    &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
                    524: 	    return '';
                    525: 	}
1.122     albertel  526: 	
1.327     albertel  527: 	if (&is_inside_of($tagstack, "head")) {
                    528: 	    &end_head(@_);
1.122     albertel  529: 	}
1.327     albertel  530: 	$currentstring = 
                    531: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
                    532: 					   $Apache::londefdef::head,
                    533: 					   {'add_entries'    => $token->[2],
                    534: 					    'no_title'       => 1,
                    535: 					    'force_register' => 1});
                    536: 
1.267     albertel  537: 	if ($env{'request.state'} ne 'published') {
1.330     albertel  538: 	    $currentstring.=&Apache::lonmenu::constspaceform();
1.122     albertel  539: 	    $currentstring.=(<<EDITBUTTON);
1.278     www       540: <form method="post">
                    541: <input type="submit" name="editmode" accesskey="e" value="Edit" />
                    542: </form>
1.327     albertel  543: <br />
1.40      albertel  544: EDITBUTTON
1.1       sakharuk  545: 	}
1.201     albertel  546: 	$currentstring.=&Apache::lonxml::message_location();
1.122     albertel  547:     } elsif ($target eq 'tex') {
                    548: 	$currentstring = '\begin{document}';  
                    549:     } 
                    550:     return $currentstring;
                    551: }
                    552: 
                    553: sub end_body {
1.259     albertel  554:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      555:     my $currentstring = &end_p();	# Close off unclosed <p>
1.324     albertel  556:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  557: 	$currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
1.122     albertel  558:     } elsif ($target eq 'tex') {
1.277     foxr      559: 	$currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';  
1.122     albertel  560:     } 
                    561:     return $currentstring;
                    562: }
                    563: 
1.309     albertel  564: # \begin{center} causes a new paragprah spacing that looks odd inside 
1.337     foxr      565: # of a table cell.  Same at the end of a \center but with a slightly
                    566: # larger space .. hence center_correction and center_end_correction.
                    567: #
                    568: sub center_correction { return '\vspace*{-6 mm}'; } 
                    569: sub center_end_correction { return '\vspace*{-7 mm}'; }
                    570: 
1.181     sakharuk  571: #-- <center> tag (end tag required)
1.122     albertel  572: sub start_center {
1.309     albertel  573:     my ($target,$token,$tagstack) = @_;
1.279     foxr      574:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  575:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr      576: 	$currentstring .= $token->[4];     
1.122     albertel  577:     } elsif ($target eq 'tex') {
1.309     albertel  578: 	if (&is_inside_of($tagstack, "table")) {
                    579: 	    $currentstring .= &center_correction();
                    580: 	}
1.277     foxr      581: 	$currentstring .= '\begin{center}';  
1.144     sakharuk  582:     }
1.122     albertel  583:     return $currentstring;
                    584: }
                    585: 
                    586: sub end_center {
1.309     albertel  587:     my ($target,$token,$tagstack) = @_;
1.122     albertel  588:     my $currentstring = '';
1.325     albertel  589:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  590: 	$currentstring = $token->[2];     
                    591:     } elsif ($target eq 'tex') {
                    592: 	$currentstring = '\end{center}';  
1.337     foxr      593: 	if (&is_inside_of($tagstack, "table")) {
                    594: 	    $currentstring .= &center_end_correction();
                    595: 	}
1.144     sakharuk  596:     }
1.122     albertel  597:     return $currentstring;
                    598: }
                    599: 
1.181     sakharuk  600: #-- <b> tag (end tag required)
1.279     foxr      601: #      NOTE: In TeX mode disables internal <p>
1.122     albertel  602: sub start_b {
                    603:     my ($target,$token) = @_;
                    604:     my $currentstring = '';
1.325     albertel  605:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  606: 	$currentstring = $token->[4];     
                    607:     } elsif ($target eq 'tex') {
1.279     foxr      608: 	&disable_para();
                    609: 	$currentstring .= '\textbf{';  
1.122     albertel  610:     } 
                    611:     return $currentstring;
                    612: }
                    613: 
                    614: sub end_b {
                    615:     my ($target,$token) = @_;
                    616:     my $currentstring = '';
1.325     albertel  617:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  618: 	$currentstring = $token->[2];     
                    619:     } elsif ($target eq 'tex') {
1.279     foxr      620: 	&enable_para();
                    621: 	$currentstring = '}';
1.122     albertel  622:     } 
                    623:     return $currentstring;
                    624: }
1.35      sakharuk  625: 
1.181     sakharuk  626: #-- <strong> tag (end tag required)
1.279     foxr      627: #    NOTE: in TeX mode disables internal <p>
1.122     albertel  628: sub start_strong {
                    629:     my ($target,$token) = @_;
                    630:     my $currentstring = '';
1.325     albertel  631:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  632: 	$currentstring = $token->[4];     
                    633:     } elsif ($target eq 'tex') {
1.279     foxr      634: 	&disable_para();
1.122     albertel  635: 	$currentstring = '\textbf{';  
                    636:     } 
                    637:     return $currentstring;
                    638: }
                    639: 
                    640: sub end_strong {
                    641:     my ($target,$token) = @_;
                    642:     my $currentstring = '';
1.325     albertel  643:     if ($target eq 'web' || $target eq 'webgrade') {	
1.122     albertel  644: 	$currentstring = $token->[2];     
                    645:     } elsif ($target eq 'tex') {
1.279     foxr      646: 	&enable_para();
1.122     albertel  647: 	$currentstring = '}';  
1.144     sakharuk  648:     }
1.122     albertel  649:     return $currentstring;
                    650: }
                    651: 
1.181     sakharuk  652: #-- <h1> tag (end tag required)
1.122     albertel  653: sub start_h1 {
1.125     sakharuk  654:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      655:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  656:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  657: 	$currentstring .= $token->[4];
                    658:     } elsif ($target eq 'tex') {
1.125     sakharuk  659: 	my $pre;
1.199     albertel  660: 	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
1.212     sakharuk  661: 	if ($align eq 'center') {
1.125     sakharuk  662: 	    $pre='\begin{center}';
                    663: 	} elsif ($align eq 'left') {
                    664: 	    $pre='\rlap{';
                    665: 	} elsif ($align eq 'right') {
                    666: 	    $pre=' \hfill \llap{';
                    667: 	}
                    668: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    669: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      670: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  671:     } elsif ($target eq 'meta') {
1.277     foxr      672: 	$currentstring.='<subject>';
1.185     albertel  673: 	&start_output($target);
1.122     albertel  674:     }
                    675:     return $currentstring;
                    676: }
                    677: 
                    678: sub end_h1 {
1.125     sakharuk  679:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  680:     my $currentstring = '';
1.325     albertel  681:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  682: 	$currentstring .= $token->[2];
                    683:     } elsif ($target eq 'tex') {
1.212     sakharuk  684: 	my $post='\vskip 0 mm ';
1.125     sakharuk  685: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  686: 	if ($align eq 'center') {
1.125     sakharuk  687: 	    $post='\end{center}';
                    688: 	} elsif ($align eq 'left') {
                    689: 	    $post='} \hfill'.'\vskip 0 mm ';
                    690: 	} elsif ($align eq 'right') {
                    691: 	    $post='}'.'\vskip 0 mm ';
                    692: 	}
                    693: 	$currentstring .= '}}'.$post;
1.122     albertel  694:     } elsif ($target eq 'meta') {
1.185     albertel  695: 	&end_output($target);
1.122     albertel  696: 	$currentstring='</subject>';
                    697:     } 
                    698:     return $currentstring;
                    699: }
                    700: 
1.35      sakharuk  701: #-- <h2> tag
1.122     albertel  702: sub start_h2 {
1.125     sakharuk  703:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      704:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  705:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  706: 	$currentstring .= $token->[4];
                    707:     } elsif ($target eq 'tex') {
1.125     sakharuk  708: 	my $pre;
                    709: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  710: 	if ($align eq 'center') {
1.125     sakharuk  711: 	    $pre='\begin{center}';
                    712: 	} elsif ($align eq 'left') {
                    713: 	    $pre='\rlap{';
                    714: 	} elsif ($align eq 'right') {
                    715: 	    $pre=' \hfill \llap{';
                    716: 	}
                    717: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    718: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      719: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  720:     } 
                    721:     return $currentstring;
                    722: }
                    723: 
                    724: sub end_h2 {
1.125     sakharuk  725:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  726:     my $currentstring = '';
1.325     albertel  727:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  728: 	$currentstring .= $token->[2];
                    729:     } elsif ($target eq 'tex') {
1.212     sakharuk  730: 	my $post='\vskip 0 mm ';
1.125     sakharuk  731: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  732: 	if ($align eq 'center') {
1.125     sakharuk  733: 	    $post='\end{center}';
                    734: 	} elsif ($align eq 'left') {
                    735: 	    $post='} \hfill'.'\vskip 0 mm ';
                    736: 	} elsif ($align eq 'right') {
                    737: 	    $post='}'.'\vskip 0 mm ';
                    738: 	}
                    739: 	$currentstring .= '}}'.$post;
1.122     albertel  740:     } 
                    741:     return $currentstring;
                    742: }
                    743: 
1.35      sakharuk  744: #-- <h3> tag
1.122     albertel  745: sub start_h3 {
1.125     sakharuk  746:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      747:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  748:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  749: 	$currentstring .= $token->[4];
                    750:     } elsif ($target eq 'tex') {
1.125     sakharuk  751: 	my $pre;
                    752: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  753: 	if ($align eq 'center') {
1.125     sakharuk  754: 	    $pre='\begin{center}';
                    755: 	} elsif ($align eq 'left') {
                    756: 	    $pre='\rlap{';
                    757: 	} elsif ($align eq 'right') {
                    758: 	    $pre=' \hfill \llap{';
                    759: 	}
                    760: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    761: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      762: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  763:     } 
                    764:     return $currentstring;
                    765: }
                    766: 
                    767: sub end_h3 {
1.125     sakharuk  768:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  769:     my $currentstring = '';
1.325     albertel  770:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  771: 	$currentstring .= $token->[2];
                    772:     } elsif ($target eq 'tex') {
1.212     sakharuk  773: 	my $post='\vskip 0 mm ';
1.125     sakharuk  774: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  775: 	if ($align eq 'center') {
1.125     sakharuk  776: 	    $post='\end{center}';
                    777: 	} elsif ($align eq 'left') {
                    778: 	    $post='} \hfill'.'\vskip 0 mm ';
                    779: 	} elsif ($align eq 'right') {
                    780: 	    $post='}'.'\vskip 0 mm ';
                    781: 	}
                    782: 	$currentstring .= '}}'.$post;
1.122     albertel  783:     } 
                    784:     return $currentstring;
                    785: }
                    786: 
1.35      sakharuk  787: #-- <h4> tag
1.122     albertel  788: sub start_h4 {
1.125     sakharuk  789:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      790:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  791:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  792: 	$currentstring .= $token->[4];
                    793:     } elsif ($target eq 'tex') {
1.125     sakharuk  794: 	my $pre;
                    795: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  796: 	if ($align eq 'center') {
1.125     sakharuk  797: 	    $pre='\begin{center}';
                    798: 	} elsif ($align eq 'left') {
                    799: 	    $pre='\rlap{';
                    800: 	} elsif ($align eq 'right') {
                    801: 	    $pre=' \hfill \llap{';
                    802: 	}
                    803: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    804: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      805: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  806:     } 
                    807:     return $currentstring;
                    808: }
                    809: 
                    810: sub end_h4 {
1.125     sakharuk  811:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  812:     my $currentstring = '';
1.325     albertel  813:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  814: 	$currentstring .= $token->[2];
                    815:     } elsif ($target eq 'tex') {
1.212     sakharuk  816: 	my $post='\vskip 0 mm ';
1.125     sakharuk  817: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  818: 	if ($align eq 'center') {
1.125     sakharuk  819: 	    $post='\end{center}';
                    820: 	} elsif ($align eq 'left') {
                    821: 	    $post='} \hfill'.'\vskip 0 mm ';
                    822: 	} elsif ($align eq 'right') {
                    823: 	    $post='}'.'\vskip 0 mm ';
                    824: 	}
                    825: 	$currentstring .= '}}'.$post;
1.122     albertel  826:     } 
                    827:     return $currentstring;
                    828: }
                    829: 
1.35      sakharuk  830: #-- <h5> tag
1.122     albertel  831: sub start_h5 {
1.125     sakharuk  832:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      833:     my $currentstring = &end_p();	# Close off any prior paras.
1.325     albertel  834:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  835: 	$currentstring .= $token->[4];
                    836:     } elsif ($target eq 'tex') {
1.125     sakharuk  837: 	my $pre;
                    838: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  839: 	if ($align eq 'center') {
1.125     sakharuk  840: 	    $pre='\begin{center}';
                    841: 	} elsif ($align eq 'left') {
                    842: 	    $pre='\rlap{';
                    843: 	} elsif ($align eq 'right') {
                    844: 	    $pre=' \hfill \llap{';
                    845: 	}
                    846: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    847: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      848: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  849:     } 
                    850:     return $currentstring;
                    851: }
                    852: 
                    853: sub end_h5 {
1.125     sakharuk  854:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  855:     my $currentstring = '';
1.325     albertel  856:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  857: 	$currentstring .= $token->[2];
                    858:     } elsif ($target eq 'tex') {
1.212     sakharuk  859: 	my $post='\vskip 0 mm ';
1.125     sakharuk  860: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  861: 	if ($align eq 'center') {
1.125     sakharuk  862: 	    $post='\end{center}';
                    863: 	} elsif ($align eq 'left') {
                    864: 	    $post='} \hfill'.'\vskip 0 mm ';
                    865: 	} elsif ($align eq 'right') {
                    866: 	    $post='}'.'\vskip 0 mm ';
                    867: 	}
                    868: 	$currentstring .= '}}'.$post;
1.122     albertel  869:     } 
                    870:     return $currentstring;
                    871: }
                    872: 
1.35      sakharuk  873: #-- <h6> tag
1.122     albertel  874: sub start_h6 {
1.125     sakharuk  875:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      876:     my $currentstring = &end_p();	# Close off any prior paras.
1.325     albertel  877:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  878: 	$currentstring .= $token->[4];
                    879:     } elsif ($target eq 'tex') {
1.125     sakharuk  880: 	my $pre;
                    881: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  882: 	if ($align eq 'center') {
1.125     sakharuk  883: 	    $pre='\begin{center}';
                    884: 	} elsif ($align eq 'left') {
                    885: 	    $pre='\rlap{';
                    886: 	} elsif ($align eq 'right') {
                    887: 	    $pre=' \hfill \llap{';
                    888: 	}
                    889: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    890: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      891: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  892:     } 
                    893:     return $currentstring;
                    894: }
                    895: 
                    896: sub end_h6 {
1.125     sakharuk  897:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  898:     my $currentstring = '';
1.325     albertel  899:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  900: 	$currentstring .= $token->[2];
                    901:     } elsif ($target eq 'tex') {
1.212     sakharuk  902: 	my $post='\vskip 0 mm ';
1.125     sakharuk  903: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  904: 	if ($align eq 'center') {
1.125     sakharuk  905: 	    $post='\end{center}';
                    906: 	} elsif ($align eq 'left') {
                    907: 	    $post='} \hfill'.'\vskip 0 mm ';
                    908: 	} elsif ($align eq 'right') {
                    909: 	    $post='}'.'\vskip 0 mm ';
                    910: 	}
                    911: 	$currentstring .= '}}'.$post;
1.122     albertel  912:     } 
                    913:     return $currentstring;
                    914: }
                    915: 
1.181     sakharuk  916: #--- <cite> tag (end tag required)
1.122     albertel  917: sub start_cite {
                    918:     my ($target,$token) = @_;
                    919:     my $currentstring = '';
1.325     albertel  920:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  921: 	$currentstring .= $token->[4];
                    922:     } elsif ($target eq 'tex') {
1.179     sakharuk  923: 	$currentstring .= '\textit{';
1.144     sakharuk  924:     }
1.122     albertel  925:     return $currentstring;
                    926: }
                    927: 
                    928: sub end_cite {
                    929:     my ($target,$token) = @_;
                    930:     my $currentstring = '';
1.325     albertel  931:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  932: 	$currentstring .= $token->[2];
                    933:     } elsif ($target eq 'tex') {
1.179     sakharuk  934: 	$currentstring .= '}';
1.144     sakharuk  935:     }
1.122     albertel  936:     return $currentstring;
                    937: }
                    938: 
1.181     sakharuk  939: #-- <i> tag (end tag required)
1.122     albertel  940: sub start_i {
                    941:     my ($target,$token) = @_;
                    942:     my $currentstring = '';
1.325     albertel  943:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  944: 	$currentstring .= $token->[4];
                    945:     } elsif ($target eq 'tex') {
                    946: 	$currentstring .= '\textit{';
1.144     sakharuk  947:     }
1.122     albertel  948:     return $currentstring;
                    949: }
                    950: 
                    951: sub end_i {
                    952:     my ($target,$token) = @_;
                    953:     my $currentstring = '';
1.325     albertel  954:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  955: 	$currentstring .= $token->[2];
                    956:     } elsif ($target eq 'tex') {
                    957: 	$currentstring .= '}';
                    958:     } 
                    959:     return $currentstring;
                    960: }
                    961: 
1.181     sakharuk  962: #-- <address> tag (end tag required)
1.122     albertel  963: sub start_address {
                    964:     my ($target,$token) = @_;
                    965:     my $currentstring = '';
1.325     albertel  966:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  967: 	$currentstring .= $token->[4];
                    968:     } elsif ($target eq 'tex') {
1.179     sakharuk  969: 	$currentstring .= '\textit{';
1.144     sakharuk  970:     }
1.122     albertel  971:     return $currentstring;
                    972: }
                    973: 
                    974: sub end_address {
                    975:     my ($target,$token) = @_;
                    976:     my $currentstring = '';
1.325     albertel  977:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  978: 	$currentstring .= $token->[2];
                    979:     } elsif ($target eq 'tex') {
1.179     sakharuk  980: 	$currentstring .= '}';
1.122     albertel  981:     }
                    982:     return $currentstring;
                    983: }
                    984: 
1.181     sakharuk  985: #-- <dfn> tag (end tag required)
1.122     albertel  986: sub start_dfn {
                    987:     my ($target,$token) = @_;
                    988:     my $currentstring = '';
1.325     albertel  989:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  990: 	$currentstring .= $token->[4];
                    991:     } elsif ($target eq 'tex') {
1.179     sakharuk  992: 	$currentstring .= '\textit{';
1.122     albertel  993:     } 
                    994:     return $currentstring;
                    995: }
                    996: 
                    997: sub end_dfn {
                    998:     my ($target,$token) = @_;
                    999:     my $currentstring = '';
1.325     albertel 1000:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1001: 	$currentstring .= $token->[2];
                   1002:     } elsif ($target eq 'tex') {
1.179     sakharuk 1003: 	$currentstring .= '}';
1.144     sakharuk 1004:     }
1.122     albertel 1005:     return $currentstring;
                   1006: }
                   1007: 
1.181     sakharuk 1008: #-- <tt> tag (end tag required)
1.122     albertel 1009: sub start_tt {
                   1010:     my ($target,$token) = @_;
                   1011:     my $currentstring = '';
1.325     albertel 1012:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1013: 	$currentstring .= $token->[4];
                   1014:     } elsif ($target eq 'tex') {
                   1015: 	$currentstring .= '\texttt{';
1.144     sakharuk 1016:     }
1.122     albertel 1017:     return $currentstring;
                   1018: }
                   1019: 
                   1020: sub end_tt {
                   1021:     my ($target,$token) = @_;
                   1022:     my $currentstring = '';
1.325     albertel 1023:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1024: 	$currentstring .= $token->[2];
                   1025:     } elsif ($target eq 'tex') {
                   1026: 	$currentstring .= '}';
                   1027:     }
                   1028:     return $currentstring;
                   1029: }
                   1030: 
1.181     sakharuk 1031: #-- <kbd> tag (end tag required)
1.122     albertel 1032: sub start_kbd {
                   1033:     my ($target,$token) = @_;
                   1034:     my $currentstring = '';
1.325     albertel 1035:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1036: 	$currentstring .= $token->[4];
                   1037:     } elsif ($target eq 'tex') {
1.179     sakharuk 1038: 	$currentstring .= '\texttt{';
1.144     sakharuk 1039:     }
1.122     albertel 1040:     return $currentstring;
                   1041: }
                   1042: 
                   1043: sub end_kbd {
                   1044:     my ($target,$token) = @_;
                   1045:     my $currentstring = '';
1.325     albertel 1046:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1047: 	$currentstring .= $token->[2];
                   1048:     } elsif ($target eq 'tex') {
1.179     sakharuk 1049: 	$currentstring .= '}';
1.144     sakharuk 1050:     }
1.122     albertel 1051:     return $currentstring;
                   1052: }
                   1053: 
1.181     sakharuk 1054: #-- <code> tag (end tag required)
1.122     albertel 1055: sub start_code {
                   1056:     my ($target,$token) = @_;
                   1057:     my $currentstring = '';
1.325     albertel 1058:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1059: 	$currentstring .= $token->[4];
                   1060:     } elsif ($target eq 'tex') {
                   1061: 	$currentstring .= '\texttt{';
                   1062:     } 
                   1063:     return $currentstring;
                   1064: }
                   1065: 
                   1066: sub end_code {
                   1067:     my ($target,$token) = @_;
                   1068:     my $currentstring = '';
1.325     albertel 1069:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1070: 	$currentstring .= $token->[2];
                   1071:     } elsif ($target eq 'tex') {
                   1072: 	$currentstring .= '}';
                   1073:     } 
                   1074:     return $currentstring;
                   1075: }
                   1076: 
1.181     sakharuk 1077: #-- <em> tag (end tag required)
1.122     albertel 1078: sub start_em {
                   1079:     my ($target,$token) = @_;
                   1080:     my $currentstring = '';
1.325     albertel 1081:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1082: 	$currentstring .= $token->[4];
                   1083:     } elsif ($target eq 'tex') {
                   1084: 	$currentstring .= '\emph{';
1.144     sakharuk 1085:     }
1.122     albertel 1086:     return $currentstring;
                   1087: }
                   1088: 
                   1089: sub end_em {
                   1090:     my ($target,$token) = @_;
                   1091:     my $currentstring = '';
1.325     albertel 1092:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1093: 	$currentstring .= $token->[2];
                   1094:     } elsif ($target eq 'tex') {
                   1095: 	$currentstring .= '}';
1.144     sakharuk 1096:     } 
1.122     albertel 1097:     return $currentstring;
                   1098: }
                   1099: 
1.181     sakharuk 1100: #-- <q> tag (end tag required)
1.122     albertel 1101: sub start_q {
                   1102:     my ($target,$token) = @_;
                   1103:     my $currentstring = '';
1.325     albertel 1104:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1105: 	$currentstring .= $token->[4];
                   1106:     } elsif ($target eq 'tex') {
1.179     sakharuk 1107: 	$currentstring .= '\emph{';
1.122     albertel 1108:     }
                   1109:     return $currentstring;
                   1110: }
                   1111: 
                   1112: sub end_q {
                   1113:     my ($target,$token) = @_;
                   1114:     my $currentstring = '';
1.325     albertel 1115:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1116: 	$currentstring .= $token->[2];
                   1117:     } elsif ($target eq 'tex') {
1.179     sakharuk 1118: 	$currentstring .= '}';
1.144     sakharuk 1119:     } 
1.122     albertel 1120:     return $currentstring;
                   1121: }
                   1122: 
1.277     foxr     1123: #  <p> is a bit strange since it does not require a closing </p>
                   1124: #  However in latex, we must often output closing stuff to end
                   1125: #  environments and {}'s etc.  Therefore we do all the work
                   1126: #  of figuring out the ending strings in the start tag processing,
                   1127: #  and provide a mechanism to output the stop text external
                   1128: #  to tag processing.
                   1129: #
                   1130: {
                   1131: 
                   1132:     my $closing_string = '';		# String required to close <p>
                   1133: 
1.279     foxr     1134: #   Some tags are <p> fragile meaning that <p> inside of them
                   1135: #   does not work within TeX mode.  This is managed via the 
                   1136: #   counter below:
                   1137: #
                   1138: 
                   1139:     my $para_disabled = 0;
                   1140: 
                   1141: sub disable_para {
                   1142:     $para_disabled++;
                   1143: }
                   1144: sub enable_para {
                   1145:     $para_disabled--;
                   1146: }
                   1147: 
                   1148: 
1.181     sakharuk 1149: #-- <p> tag (end tag optional)
1.198     sakharuk 1150: #optional attribute - align="center|left|right"
1.122     albertel 1151: sub start_p {
1.157     sakharuk 1152:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1153:     my $currentstring = '';
1.325     albertel 1154:     if ($target eq 'web' || $target eq 'webgrade') {
1.279     foxr     1155: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.122     albertel 1156: 	$currentstring .= $token->[4];
1.279     foxr     1157: 	if (! ($currentstring =~ /\//)) {
                   1158: 	    $closing_string = '</p>'; # Deal correctly with <p /> e.g.
                   1159: 	}
                   1160:     } elsif ($target eq 'tex' && !$para_disabled) {
1.313     foxr     1161: 
1.279     foxr     1162: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.198     sakharuk 1163: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1164: 	if ($align eq 'center') {
1.333     albertel 1165: 	    $currentstring .='\begin{center}\par ';
1.277     foxr     1166: 	    $closing_string = '\end{center}';
1.309     albertel 1167: 	    if (&is_inside_of($tagstack, "table")) {
                   1168: 		$currentstring = &center_correction().$currentstring;
                   1169: 	    }
1.198     sakharuk 1170: 	} elsif ($align eq 'right') {
1.323     foxr     1171: 	    $currentstring.="\n".'{\flushright ';
                   1172: #	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
                   1173: 	    $closing_string= "}\n";
1.198     sakharuk 1174: 	} elsif ($align eq 'left') {
1.323     foxr     1175: 	    $currentstring.= "\n".'{\flushleft ';
                   1176: #	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
                   1177: 	    $closing_string = "}\n";
1.216     matthew  1178: 	} else {
1.277     foxr     1179:             $currentstring.='\par ';
1.313     foxr     1180: 	    if (&is_inside_of($tagstack, 'table')) {
1.315     foxr     1181: 		$closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1.313     foxr     1182: 	    } else {
                   1183: 		$closing_string = '\strut\\\\\strut ';
                   1184: 	    }
1.216     matthew  1185:         }
1.277     foxr     1186: 
1.144     sakharuk 1187:     }
1.122     albertel 1188:     return $currentstring;
                   1189: }
1.277     foxr     1190: #
                   1191: #  End paragraph processing just requires that we output the
                   1192: #  closing string that was saved and blank it.
                   1193: sub end_p {
1.279     foxr     1194:     #  Note only 'tex' mode uses disable_para and enable_para
                   1195:     #  so we don't need to know the target in the check below:
                   1196: 
                   1197:     if (!$para_disabled) {
                   1198: 	my $current_string = $closing_string;
                   1199: 	$closing_string = '';	# Not in a para anymore.
                   1200: 	return $current_string;
                   1201:     } else {
                   1202: 	return '';
                   1203:     }
1.122     albertel 1204: 
                   1205: }
1.277     foxr     1206: }
1.181     sakharuk 1207: #-- <br> tag (end tag forbidden)
1.122     albertel 1208: sub start_br {
                   1209:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1210:     my $currentstring = '';
1.325     albertel 1211:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1212: 	$currentstring .= $token->[4];
                   1213:     } elsif ($target eq 'tex') {
1.227     sakharuk 1214: 	my @tempo=@$tagstack;
1.229     sakharuk 1215: 	my $signal=0;
1.287     foxr     1216: 	#  Not going to factor this to is_inside_of since that would require
                   1217:         #  multiple stack traversals.
                   1218: 	#
1.227     sakharuk 1219: 	for (my $i=$#tempo;$i>=0;$i--) {
                   1220: 	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1.334     albertel 1221:                 ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul'))  {
1.229     sakharuk 1222: 		$signal=1;
1.334     albertel 1223: 	    }
                   1224: 	    if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1.336     foxr     1225: 		$signal = 1;
1.227     sakharuk 1226: 	    }
                   1227: 	}
1.334     albertel 1228: 	if ($signal eq 1) {
1.219     sakharuk 1229: 	    $currentstring .= ' \vskip 0 mm ';
                   1230: 	} elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
                   1231: 	    $currentstring .= '\strut \\\\ \strut ';
1.338     foxr     1232: 	} else {                   # Honor break in simple <sup></sup>
                   1233: 	    $currentstring .= '}} \strut \\\\ \strut \ensuremath{^{'; 
1.1       sakharuk 1234: 	}
1.144     sakharuk 1235:     }
1.122     albertel 1236:     return $currentstring;
                   1237: }
                   1238: 
                   1239: sub end_br {
                   1240:     my ($target,$token) = @_;
                   1241:     my $currentstring = '';
1.325     albertel 1242:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1243: 	$currentstring .= $token->[2];
                   1244:     }
                   1245:     return $currentstring;
                   1246: }
                   1247: 
1.181     sakharuk 1248: #-- <big> tag (end tag required)
1.122     albertel 1249: sub start_big {
                   1250:     my ($target,$token) = @_;
                   1251:     my $currentstring = '';
1.325     albertel 1252:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1253: 	$currentstring .= $token->[4];
                   1254:     } elsif ($target eq 'tex') {
1.137     sakharuk 1255: 	$currentstring .= '{\large ';
1.144     sakharuk 1256:     } 
1.122     albertel 1257:     return $currentstring;
                   1258: }
                   1259: 
                   1260: sub end_big {
                   1261:     my ($target,$token) = @_;
                   1262:     my $currentstring = '';
1.325     albertel 1263:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1264: 	$currentstring .= $token->[2];
                   1265:     } elsif ($target eq 'tex') {
                   1266: 	$currentstring .= '}';
                   1267:     }
                   1268:     return $currentstring;
                   1269: }
                   1270: 
1.181     sakharuk 1271: #-- <small> tag (end tag required)
1.122     albertel 1272: sub start_small {
                   1273:     my ($target,$token) = @_;
                   1274:     my $currentstring = '';
1.325     albertel 1275:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1276: 	$currentstring .= $token->[4];
                   1277:     } elsif ($target eq 'tex') {
                   1278: 	$currentstring .= '{\footnotesize ';
1.144     sakharuk 1279:     }
1.122     albertel 1280:     return $currentstring;
                   1281: }
                   1282: 
                   1283: sub end_small {
                   1284:     my ($target,$token) = @_;
                   1285:     my $currentstring = '';
1.325     albertel 1286:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1287: 	$currentstring .= $token->[2];
                   1288:     } elsif ($target eq 'tex') {
                   1289: 	$currentstring .= '}';
                   1290:     }
                   1291:     return $currentstring;
                   1292: }
                   1293: 
1.181     sakharuk 1294: #-- <basefont> tag (end tag forbidden)
1.122     albertel 1295: sub start_basefont {
1.126     sakharuk 1296:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.122     albertel 1297:     my $currentstring = '';
1.325     albertel 1298:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1299: 	$currentstring = $token->[4];     
1.126     sakharuk 1300:     } elsif ($target eq 'tex') {
                   1301: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1302: 	if (defined $basesize) {
                   1303: 	    $currentstring = '{\\'.$basesize.' ';
                   1304: 	}
                   1305:     }
1.122     albertel 1306:     return $currentstring;
                   1307: }
                   1308: 
                   1309: sub end_basefont {
1.126     sakharuk 1310:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1311:     my $currentstring = '';
1.325     albertel 1312:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1313: 	$currentstring = $token->[4];     
1.126     sakharuk 1314:     } elsif ($target eq 'tex') {
                   1315: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1316: 	if (defined $basesize) {
                   1317: 	    $currentstring = '}';
                   1318: 	}
                   1319:     }
1.122     albertel 1320:     return $currentstring;
                   1321: }
                   1322: 
1.181     sakharuk 1323: #-- <font> tag (end tag required)
1.122     albertel 1324: sub start_font {
                   1325:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1326:     my $currentstring = '';
1.325     albertel 1327:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1328: 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1.204     albertel 1329: 	if ($face!~/symbol/i) {
1.267     albertel 1330: 	    if (($env{'browser.fontenhance'} eq 'on') || 
                   1331: 		($env{'browser.blackwhite'} eq 'on')) { return ''; }
1.155     www      1332: 	}
1.122     albertel 1333: 	$currentstring = $token->[4];     
1.126     sakharuk 1334:     }  elsif ($target eq 'tex') {
                   1335: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1336: 	if (defined $fontsize) {
                   1337: 	    $currentstring = '{\\'.$fontsize.' ';
                   1338: 	}
                   1339:     }
1.122     albertel 1340:     return $currentstring;
                   1341: }
                   1342: 
                   1343: sub end_font {
                   1344:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1345:     my $currentstring = '';
1.325     albertel 1346:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1347: 	$currentstring = $token->[2];    
1.126     sakharuk 1348:     }  elsif ($target eq 'tex') {
                   1349: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1350: 	if (defined $fontsize) {
                   1351: 	    $currentstring = '}';
                   1352: 	}
                   1353:     }
1.122     albertel 1354:     return $currentstring;
                   1355: }
                   1356:  
1.181     sakharuk 1357: #-- <strike> tag (end tag required)
1.122     albertel 1358: sub start_strike {
                   1359:     my ($target,$token) = @_;
                   1360:     my $currentstring = '';
1.325     albertel 1361:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1362: 	$currentstring .= $token->[4];
                   1363:     } elsif ($target eq 'tex') {
                   1364: 	&Apache::lonxml::startredirection();
                   1365:     } 
                   1366:     return $currentstring;
                   1367: }
                   1368: 
                   1369: sub end_strike {
                   1370:     my ($target,$token) = @_;
                   1371:     my $currentstring = '';
1.325     albertel 1372:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1373: 	$currentstring .= $token->[2];
                   1374:     } elsif ($target eq 'tex') {
                   1375: 	$currentstring=&Apache::lonxml::endredirection();
                   1376: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 
                   1377: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/; 
                   1378: 	$currentstring=~s/(\S)\s*$/$1\}/;
                   1379:     }
                   1380:     return $currentstring;
                   1381: }
                   1382: 
1.181     sakharuk 1383: #-- <s> tag (end tag required)
1.122     albertel 1384: sub start_s {
                   1385:     my ($target,$token) = @_;
                   1386:     my $currentstring = '';
1.325     albertel 1387:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1388: 	$currentstring .= $token->[4];
                   1389:     } elsif ($target eq 'tex') {
                   1390: 	&Apache::lonxml::startredirection();
                   1391:     } 
                   1392:     return $currentstring;
                   1393: }
                   1394: 
                   1395: sub end_s {
                   1396:     my ($target,$token) = @_;
                   1397:     my $currentstring = '';
1.325     albertel 1398:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1399: 	$currentstring .= $token->[2];
                   1400:     } elsif ($target eq 'tex') {
                   1401: 	$currentstring=&Apache::lonxml::endredirection();
                   1402: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1403: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1404: 	$currentstring=~s/(\S)\s*$/$1\}/;	
                   1405:     }
                   1406:     return $currentstring;
                   1407: }
                   1408: 
1.181     sakharuk 1409: #-- <sub> tag (end tag required)
1.122     albertel 1410: sub start_sub {
                   1411:     my ($target,$token) = @_;
                   1412:     my $currentstring = '';
1.325     albertel 1413:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1414: 	$currentstring .= $token->[4];
                   1415:     } elsif ($target eq 'tex') {
1.202     sakharuk 1416: 	$currentstring .= '\ensuremath{_{';
1.122     albertel 1417:     } 
                   1418:     return $currentstring;
                   1419: }
                   1420: 
                   1421: sub end_sub {
                   1422:     my ($target,$token) = @_;
                   1423:     my $currentstring = '';
1.325     albertel 1424:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1425: 	$currentstring .= $token->[2];
                   1426:     } elsif ($target eq 'tex') {
1.202     sakharuk 1427: 	$currentstring .= '}}';
1.122     albertel 1428:     }
                   1429:     return $currentstring;
                   1430: }
                   1431: 
1.181     sakharuk 1432: #-- <sup> tag (end tag required)
1.122     albertel 1433: sub start_sup {
                   1434:     my ($target,$token) = @_;
                   1435:     my $currentstring = '';
1.325     albertel 1436:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1437: 	$currentstring .= $token->[4];
                   1438:     } elsif ($target eq 'tex') {
1.202     sakharuk 1439: 	$currentstring .= '\ensuremath{^{';
1.122     albertel 1440:     } 
                   1441:     return $currentstring;
                   1442: }
                   1443: 
                   1444: sub end_sup {
                   1445:     my ($target,$token) = @_;
                   1446:     my $currentstring = '';
1.325     albertel 1447:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1448: 	$currentstring .= $token->[2];
                   1449:     } elsif ($target eq 'tex') {
1.202     sakharuk 1450: 	$currentstring .= '}}';
1.122     albertel 1451:     }
                   1452:     return $currentstring;
                   1453: }
                   1454: 
1.181     sakharuk 1455: #-- <hr> tag (end tag forbidden)
1.122     albertel 1456: sub start_hr {
1.124     sakharuk 1457:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1458:     my $currentstring = &end_p();	# End enclosing para.
1.325     albertel 1459:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1460: 	$currentstring .= $token->[4];
                   1461:     } elsif ($target eq 'tex') {
1.149     sakharuk 1462: 	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.124     sakharuk 1463: 	if (defined $LaTeXwidth) {
                   1464: 	    if ($LaTeXwidth=~/^%/) {
                   1465: 		substr($LaTeXwidth,0,1)='';
                   1466: 		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
                   1467: 	    }
                   1468: 	} else {
1.148     sakharuk 1469: 	    $LaTeXwidth ='0.9\textwidth';
1.124     sakharuk 1470: 	}
                   1471: 	my ($pre,$post);
                   1472: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1473: 	if (($align eq 'center') || (not defined $align)) {
                   1474: 	    $pre=''; $post='';
                   1475: 	} elsif ($align eq 'left') {
                   1476: 	    $pre='\rlap{'; $post='} \hfill';
                   1477: 	} elsif ($align eq 'right') {
                   1478: 	    $pre=' \hfill \llap{'; $post='}';
                   1479: 	}
1.148     sakharuk 1480: 	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1.124     sakharuk 1481:                                     $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1.122     albertel 1482:     } 
                   1483:     return $currentstring;
                   1484: }
                   1485: 
                   1486: sub end_hr {
                   1487:     my ($target,$token) = @_;
                   1488:     my $currentstring = '';
1.325     albertel 1489:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1490: 	$currentstring .= $token->[2];
1.148     sakharuk 1491:     }
1.122     albertel 1492:     return $currentstring;
                   1493: }
                   1494: 
1.181     sakharuk 1495: #-- <div> tag (end tag required)
1.280     foxr     1496: {
                   1497: 
                   1498: #  Since div can be nested, the stack below is used
                   1499: #  in 'tex' mode to store the ending strings
                   1500: #  for the div stack.
                   1501: 
                   1502:     my @div_end_stack;
                   1503: 
1.122     albertel 1504: sub start_div {
1.280     foxr     1505:     my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1.279     foxr     1506:     my $currentstring = &end_p();	# Close enclosing para.
1.325     albertel 1507:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1508: 	$currentstring .= $token->[4];
                   1509:     } 
1.280     foxr     1510:     if ($target eq 'tex') {
                   1511: 	# 4 possible alignments: left, right, center, and -missing-.
                   1512: 
                   1513: 	my $endstring = '';
                   1514: 
                   1515: 	my $align = lc(&Apache::lonxml::get_param('align', $parstack,
                   1516: 						  $safeeval, undef, 1));
                   1517: 	if ($align eq 'center') {
                   1518: 	    $currentstring .= '\begin{center}';
                   1519: 	    $endstring      = '\end{center}';
1.309     albertel 1520: 	    if (&is_inside_of($tagstack, "table")) {
                   1521: 		$currentstring = &center_correction().$currentstring;
                   1522: 	    }
1.280     foxr     1523: 	}
                   1524: 	elsif ($align eq 'right') {
                   1525: 	    $currentstring .= '\begin{flushright}';
                   1526: 	    $endstring     .= '\end{flushright}';
                   1527: 	} elsif ($align eq 'left') {
                   1528: 	    $currentstring .= '\begin{flushleft}';
                   1529: 	    $endstring     = '\end{flushleft}';
                   1530: 	} else {
                   1531: 	
                   1532: 	}
                   1533: 	$currentstring .= "\n";   # For human readability.
                   1534: 	$endstring       = "\n$endstring\n"; # For human readability
                   1535: 	push(@div_end_stack, $endstring);
                   1536:     }
1.122     albertel 1537:     return $currentstring;
                   1538: }
                   1539: 
                   1540: sub end_div {
                   1541:     my ($target,$token) = @_;
                   1542:     my $currentstring = '';
1.325     albertel 1543:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1544: 	$currentstring .= $token->[2];
1.280     foxr     1545:     }
                   1546:     if ($target eq 'tex') {
                   1547: 	my $endstring = pop @div_end_stack;
                   1548: 	$currentstring .= $endstring;
                   1549:     }
1.122     albertel 1550:     return $currentstring;
                   1551: }
1.280     foxr     1552: }
1.122     albertel 1553: 
1.181     sakharuk 1554: #-- <a> tag (end tag required)
1.122     albertel 1555: sub start_a {
1.149     sakharuk 1556:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1557:     my $currentstring = '';
1.325     albertel 1558:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 1559: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   1560: 					    undef,1);
                   1561: 	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1.122     albertel 1562:     } elsif ($target eq 'tex') {
1.149     sakharuk 1563: 	my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1.161     sakharuk 1564: 	my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
                   1565: 	if ($a=~/\S/) {
                   1566: 	    $a=~s/([^\\])%/$1\\\%/g;
                   1567: 	    $currentstring .= '\ref{URI: '.$a.'}';
                   1568: 	} elsif ($b=~/\S/) {
                   1569: 	    $currentstring .= '\ref{Anchor: '.$b.'}';
                   1570: 	} else {
                   1571: 	    $currentstring.='';
                   1572: 	}
1.122     albertel 1573:     }
                   1574:     return $currentstring;
                   1575: }
                   1576: 
                   1577: sub end_a {
1.168     albertel 1578:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1579:     my $currentstring = '';
1.325     albertel 1580:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1581: 	$currentstring .= $token->[2];
                   1582:     }
                   1583:     return $currentstring;
                   1584: }
                   1585: 
1.181     sakharuk 1586: #-- <li> tag (end tag optional)
1.122     albertel 1587: sub start_li {
1.168     albertel 1588:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1589:     my $currentstring = '';
1.325     albertel 1590:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1591: 	$currentstring = $token->[4];     
                   1592:     } elsif ($target eq 'tex') {
1.237     sakharuk 1593: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1594: 	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1.238     albertel 1595: 	#FIXME need to support types i and I 
                   1596: 	if ($type=~/disc/) {
                   1597: 	    $currentstring .= ' \item[$\bullet$] ';
                   1598: 	} elsif ($type=~/circle/) {
                   1599: 	    $currentstring .= ' \item[$\circ$] ';
1.146     sakharuk 1600: 	} elsif ($type=~/square/) {
1.238     albertel 1601: 	    $currentstring .= ' \item[$\diamond$] ';
                   1602: 	} elsif ($type eq '1') {
                   1603: 	    $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1.237     sakharuk 1604: 	} elsif ($type eq 'A') {
1.238     albertel 1605: 	    $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1606: 	} elsif ($type eq 'a') {
1.238     albertel 1607: 	    $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1608: 	} elsif ($value ne '') {
                   1609: 	    $currentstring .= ' \item['.$value.'] ';
1.122     albertel 1610: 	} else {
1.146     sakharuk 1611: 	    $currentstring .= ' \item ';
1.122     albertel 1612: 	}  
1.238     albertel 1613: 	$Apache::londefdef::list_index++;
                   1614:     }
1.122     albertel 1615:     return $currentstring;
                   1616: }
                   1617: 
                   1618: sub end_li {
                   1619:     my ($target,$token) = @_;
1.279     foxr     1620:     my $currentstring = &end_p();	# In case there's a <p> in the <li>
1.325     albertel 1621:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1622: 	$currentstring .= $token->[2];     
1.122     albertel 1623:     } 
                   1624:     return $currentstring;
                   1625: }
                   1626: 
1.181     sakharuk 1627: #-- <u> tag (end tag required)
1.122     albertel 1628: sub start_u {
                   1629:     my ($target,$token) = @_;
                   1630:     my $currentstring = '';
1.325     albertel 1631:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1632: 	$currentstring .= $token->[4];
                   1633:     } elsif ($target eq 'tex') {
                   1634: 	&Apache::lonxml::startredirection();
                   1635:     } 
                   1636:     return $currentstring;
                   1637: }
                   1638: 
                   1639: sub end_u {
                   1640:     my ($target,$token) = @_;
                   1641:     my $currentstring = '';
1.325     albertel 1642:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1643: 	$currentstring .= $token->[2];
                   1644:     } elsif ($target eq 'tex') {
                   1645: 	$currentstring=&Apache::lonxml::endredirection();
                   1646: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1647: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1648: 	$currentstring=~s/(\S)\s*$/$1\}/;		
                   1649:     }
                   1650:     return $currentstring;
                   1651: }
                   1652: 
1.181     sakharuk 1653: #-- <ul> tag (end tag required)
1.122     albertel 1654: sub start_ul {
1.125     sakharuk 1655:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1656:     my $currentstring = &end_p();	# Close off enclosing list.
1.325     albertel 1657:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1658: 	$currentstring .= $token->[4];     
1.122     albertel 1659:     } elsif ($target eq 'tex') {
1.125     sakharuk 1660: 	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1.238     albertel 1661: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1662: 	if ($TeXtype eq 'disc') {
1.222     sakharuk 1663: 	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                   1664:                               '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1665:                               '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1666:                               '\renewcommand{\labelitemiv}{$\bullet$}';
1.125     sakharuk 1667: 	} elsif ($TeXtype eq 'circle') {
1.222     sakharuk 1668: 	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                   1669:                               '\renewcommand{\labelitemii}{$\circ$}'. 
                   1670:                               '\renewcommand{\labelitemiii}{$\circ$}'.
                   1671:                               '\renewcommand{\labelitemiv}{$\circ$}';
1.125     sakharuk 1672: 	} elsif ($TeXtype eq 'square') {
1.222     sakharuk 1673: 	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                   1674:                               '\renewcommand{\labelitemii}{$\diamond$}'. 
                   1675:                               '\renewcommand{\labelitemiii}{$\diamond$}'.
                   1676:                               '\renewcommand{\labelitemiv}{$\diamond$}';
1.125     sakharuk 1677: 	}
1.222     sakharuk 1678: 	$currentstring .= '\strut \begin{itemize}';  
1.122     albertel 1679:     } 
                   1680:     return $currentstring;
                   1681: }
                   1682: 
                   1683: sub end_ul {
                   1684:     my ($target,$token) = @_;
                   1685:     my $currentstring = '';
1.325     albertel 1686:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1687: 	$currentstring = $token->[2];     
                   1688:     } elsif ($target eq 'tex') {
1.222     sakharuk 1689: 	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                   1690:                                '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1691:                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1692:                                '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
1.122     albertel 1693:     } 
                   1694:     return $currentstring;
                   1695: }
                   1696: 
1.181     sakharuk 1697: #-- <menu> tag (end tag required)
1.122     albertel 1698: sub start_menu {
                   1699:     my ($target,$token) = @_;
                   1700:     my $currentstring = '';
1.325     albertel 1701:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1702: 	$currentstring = $token->[4];     
                   1703:     } elsif ($target eq 'tex') {
                   1704: 	$currentstring = " \\begin{itemize} ";  
                   1705:     } 
                   1706:     return $currentstring;
                   1707: }
                   1708: 
                   1709: sub end_menu {
                   1710:     my ($target,$token) = @_;
                   1711:     my $currentstring = '';
1.325     albertel 1712:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1713: 	$currentstring = $token->[2];     
                   1714:     } elsif ($target eq 'tex') {
                   1715: 	$currentstring = " \\end{itemize}";  
                   1716:     } 
                   1717:     return $currentstring;
                   1718: }
                   1719: 
1.181     sakharuk 1720: #-- <dir> tag (end tag required)
1.122     albertel 1721: sub start_dir {
                   1722:     my ($target,$token) = @_;
1.279     foxr     1723:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.325     albertel 1724:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1725: 	$currentstring .= $token->[4];     
1.122     albertel 1726:     } elsif ($target eq 'tex') {
1.277     foxr     1727: 	$currentstring .= " \\begin{itemize} ";  
1.122     albertel 1728:     } 
                   1729:     return $currentstring;
                   1730: }
                   1731: 
                   1732: sub end_dir {
                   1733:     my ($target,$token) = @_;
                   1734:     my $currentstring = '';
1.325     albertel 1735:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1736: 	$currentstring = $token->[2];     
                   1737:     } elsif ($target eq 'tex') {
                   1738: 	$currentstring = " \\end{itemize}";  
                   1739:     } 
                   1740:     return $currentstring;
                   1741: }
                   1742: 
1.181     sakharuk 1743: #-- <ol> tag (end tag required)
1.122     albertel 1744: sub start_ol {
1.125     sakharuk 1745:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1746:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.325     albertel 1747:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1748: 	$currentstring .= $token->[4];     
1.122     albertel 1749:     } elsif ($target eq 'tex') {
1.238     albertel 1750: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1751: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1752: 	if ($type eq '1') {
1.222     sakharuk 1753: 	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1754:                               '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                   1755:                               '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1756:                               '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1.125     sakharuk 1757: 	} elsif ($type eq 'A') {
1.222     sakharuk 1758: 	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                   1759:                               '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                   1760:                               '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                   1761:                               '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1.125     sakharuk 1762: 	} elsif ($type eq 'a') {
1.222     sakharuk 1763: 	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                   1764:                               '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                   1765:                               '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                   1766:                               '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1.125     sakharuk 1767: 	} elsif ($type eq 'i') {
1.222     sakharuk 1768: 	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                   1769:                               '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                   1770:                               '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                   1771:                               '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1.125     sakharuk 1772: 	} elsif ($type eq 'I') {
1.222     sakharuk 1773: 	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                   1774:                               '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                   1775:                               '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                   1776:                               '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1.125     sakharuk 1777: 	}
1.222     sakharuk 1778: 	$currentstring .= '\strut \begin{enumerate}';  
1.122     albertel 1779:     } 
                   1780:     return $currentstring;
                   1781: }
                   1782: 
                   1783: sub end_ol {
                   1784:     my ($target,$token) = @_;
                   1785:     my $currentstring = '';
1.325     albertel 1786:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1787: 	$currentstring = $token->[2];     
                   1788:     } elsif ($target eq 'tex') {
1.222     sakharuk 1789: 	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1790:                                         '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                   1791:                                         '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1792:                                         '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
1.122     albertel 1793:     } 
                   1794:     return $currentstring;
                   1795: }
                   1796: 
1.181     sakharuk 1797: #-- <dl> tag (end tag required)
1.122     albertel 1798: sub start_dl {
                   1799:     my ($target,$token) = @_;
1.279     foxr     1800:     my $currentstring = &end_p();	# In case there's a <p> unclosed prior to the list.
1.325     albertel 1801:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1802: 	$currentstring .= $token->[4];     
1.122     albertel 1803:     } elsif ($target eq 'tex') {
1.277     foxr     1804: 	$currentstring .= '\begin{description}';
1.243     albertel 1805: 	$Apache::londefdef::DL++;
                   1806: 	push(@Apache::londefdef::description,[]);
                   1807: 	$Apache::londefdef::DD[$Apache::londefdef::DL]=0;
                   1808: 	$Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1.244     albertel 1809: 	$Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1.122     albertel 1810:     } 
                   1811:     return $currentstring;
                   1812: }
                   1813: 
                   1814: sub end_dl {
1.174     sakharuk 1815:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1816:     my $currentstring = '';
1.325     albertel 1817:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1818: 	$currentstring = $token->[2];     
                   1819:     } elsif ($target eq 'tex') {
1.243     albertel 1820: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1821: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
                   1822: 	foreach my $element (@{$Apache::londefdef::description[-1]}) {
1.174     sakharuk 1823: 	    $currentstring.=' '.$element.' ';
                   1824: 	}
1.243     albertel 1825: 	pop(@Apache::londefdef::description);
1.174     sakharuk 1826: 	$currentstring.='\end{description}';  
1.243     albertel 1827: 	delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
                   1828: 	delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1.244     albertel 1829: 	delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1.243     albertel 1830: 	$Apache::londefdef::DL--;
1.122     albertel 1831:     } 
                   1832:     return $currentstring;
                   1833: }
                   1834: 
1.172     sakharuk 1835: #-- <dt> tag (end tag optional)
1.122     albertel 1836: sub start_dt {
1.172     sakharuk 1837:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1838:     my $currentstring='';
1.325     albertel 1839:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1840: 	$currentstring = $token->[4];     
                   1841:     } elsif ($target eq 'tex') {
1.243     albertel 1842: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1843: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1.174     sakharuk 1844: 	&Apache::lonxml::startredirection();
1.243     albertel 1845: 	$Apache::londefdef::DT[-1]++;
1.244     albertel 1846: 	$Apache::londefdef::seenDT[-1]=1;
1.122     albertel 1847:     } 
                   1848:     return $currentstring;
                   1849: }
                   1850: 
                   1851: sub end_dt {
1.172     sakharuk 1852:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1853:     my $currentstring = '';
1.325     albertel 1854:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1855: 	$currentstring = $token->[2];    
                   1856:     } elsif ($target eq 'tex') {
1.243     albertel 1857: 	if ($Apache::londefdef::DT[-1]) {
                   1858: 	    my $data=&item_cleanup();
1.244     albertel 1859: 	    push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1.243     albertel 1860: 	    $Apache::londefdef::DT[-1]--;
                   1861: 	}
1.122     albertel 1862:     } 
                   1863:     return $currentstring;
                   1864: }
                   1865: 
1.173     sakharuk 1866: sub item_cleanup {
1.174     sakharuk 1867:     my $item=&Apache::lonxml::endredirection();
1.173     sakharuk 1868:     $item=~s/\\begin{center}//g;
                   1869:     $item=~s/\\end{center}//g;
                   1870:     return $item;
                   1871: }
                   1872: 
1.181     sakharuk 1873: #-- <dd> tag (end tag optional)
1.122     albertel 1874: sub start_dd {
1.147     sakharuk 1875:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1876:     my $currentstring = '';
1.325     albertel 1877:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1878: 	$currentstring = $token->[4];     
1.147     sakharuk 1879:     } elsif ($target eq 'tex') {
1.243     albertel 1880: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1881: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1.244     albertel 1882: 	if (!$Apache::londefdef::seenDT[-1]) {
                   1883: 	    push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
                   1884: 	}
1.243     albertel 1885: 	push(@{$Apache::londefdef::description[-1]},'');
                   1886: 	$Apache::londefdef::description[-1]->[-1].=' \strut ';
                   1887: 	$Apache::londefdef::DD[-1]++;
1.174     sakharuk 1888: 	&Apache::lonxml::startredirection();
1.122     albertel 1889:     } 
                   1890:     return $currentstring;
                   1891: }
                   1892: 
                   1893: sub end_dd {
1.174     sakharuk 1894:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1895:     my $currentstring = '';
1.325     albertel 1896:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1897: 	$currentstring = $token->[2];    
1.174     sakharuk 1898:     }  elsif ($target eq 'tex') {
1.243     albertel 1899: 	$Apache::londefdef::description[-1]->[-1].=
                   1900: 	    &Apache::lonxml::endredirection().' \vskip 0mm ';
                   1901: 	$Apache::londefdef::DD[-1]--;
1.174     sakharuk 1902:     }
1.122     albertel 1903:     return $currentstring;
                   1904: }
                   1905: 
1.181     sakharuk 1906: #-- <table> tag (end tag required)
1.277     foxr     1907: #       <table> also ends any prior <p> that is not closed.
                   1908: #               but, unless I allow <p>'s to nest, that's the
                   1909: #               only way I could think of to allow <p> in 
                   1910: #               <tr> <th> bodies
                   1911: #
1.206     sakharuk 1912: #list of supported attributes: border,width,TeXwidth
1.91      sakharuk 1913: sub start_table {
                   1914:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.277     foxr     1915:     my $textwidth = '';
1.279     foxr     1916:     my $currentstring = &end_p();
1.325     albertel 1917:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1918: 	$currentstring .= $token->[4];     
1.91      sakharuk 1919:     } elsif ($target eq 'tex') {
1.344     albertel 1920: 	push(@Apache::londefdef::table, {}); 
1.91      sakharuk 1921: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 1922:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 1923: 	if ($#Apache::londefdef::table==0) {
1.267     albertel 1924: 	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1.206     sakharuk 1925: 	    $textwidth=~/(\d+\.?\d*)/;
                   1926: 	    $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
                   1927: 	} else {
                   1928: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   1929: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   1930: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   1931: 	    } else {
                   1932:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 1933: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 1934: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   1935: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   1936: 		}
                   1937: 	    }
                   1938: 	}
1.294     foxr     1939: 
                   1940: 	# width either comes forced from the TeXwidth or the width parameters.
                   1941: 	# in either case it can be a percentage or absolute width.
1.311     albertel 1942: 	# in the width case we ignore absolute width 
1.126     sakharuk 1943: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.308     albertel 1944: 	if (!defined($TeXwidth)) {
1.311     albertel 1945: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
                   1946: 						       $safeeval,undef,1);
                   1947: 	    if ($htmlwidth =~ /%/) {
                   1948: 		$TeXwidth = $htmlwidth;
                   1949: 	    } else { 
                   1950: 		$TeXwidth = $textwidth;
                   1951: 	    }
1.294     foxr     1952: 	} else {
                   1953: 	    $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
                   1954: 	}
                   1955: 	if ($TeXwidth=~/%/) {
1.203     sakharuk 1956: 	    $Apache::londefdef::table[-1]{'percent'}=1;
1.126     sakharuk 1957: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 1958:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 1959: 	} else {
1.206     sakharuk 1960: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.316     foxr     1961: 	}
                   1962:         #  In the end, however the table width cannot be wider than $textwidth...
                   1963: 	
                   1964: 	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
                   1965: 	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
                   1966: 	}
1.294     foxr     1967: 
1.126     sakharuk 1968:         #table's border
1.206     sakharuk 1969: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 1970:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 1971: 	unless (defined $border) { $border = 0; }
                   1972: 	if ($border) { 
                   1973: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   1974: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   1975: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   1976: 	} else {
                   1977: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   1978: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   1979: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   1980: 	}
1.206     sakharuk 1981: 	if ($#Apache::londefdef::table==0) {
1.281     foxr     1982: 	    #    Note that \newline seems to destroy the alignment envs.
                   1983: 	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
                   1984: 	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 1985: 	}
                   1986: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   1987:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   1988:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 1989:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 1990:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   1991:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   1992:         $Apache::londefdef::table[-1]{'content'}=[];
                   1993:         $Apache::londefdef::table[-1]{'align'}=[];
1.340     foxr     1994: 	if (&is_inside_of($tagstack, 'sup')) {
                   1995: 	    $currentstring .= '}} \\\\ \ensuremath{^{ ';
                   1996: 	}
                   1997: 	if (&is_inside_of($tagstack, 'sub')) {
                   1998: 	    $currentstring .= '}} \\\\ \ensuremath{_{ ';
                   1999: 	}
                   2000:         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
1.295     foxr     2001: 
1.294     foxr     2002: 
                   2003:     }
1.91      sakharuk 2004:     return $currentstring;
                   2005: }
1.122     albertel 2006:  
                   2007: sub end_table {
                   2008:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2009:     my $currentstring = '';
1.325     albertel 2010:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2011: 	$currentstring = $token->[2];     
                   2012:     } elsif ($target eq 'tex') {
                   2013: 	my $inmemory = '';
                   2014: 	my $output = '';
1.206     sakharuk 2015: 	my $WARNING='';
                   2016:         #width of columns from TeXwidth attributes
1.294     foxr     2017: 
1.206     sakharuk 2018: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2019: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2020: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   2021: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   2022: 		}	
                   2023: 	    }
                   2024: 	}
                   2025:         #free space and number of empty columns
                   2026: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 2027: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 2028: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2029: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   2030: 		$empty_columns++;
                   2031: 	    } else {
                   2032: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   2033: 	    }
                   2034: 	}
                   2035:         #boundaries for contents columns
                   2036: 	my @min_len=();#columns can not be narrower 
                   2037: 	my @max_len=();#maximum length of column
                   2038: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2039: 		my ($localmin,$localmax)=(0,0);
                   2040: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2041: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   2042: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   2043: 		    }
                   2044: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   2045: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   2046: 		    }
                   2047: 		}
                   2048: 		push @min_len, $localmin;
                   2049: 		push @max_len, $localmax;
1.122     albertel 2050: 	}
1.206     sakharuk 2051: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2052: 	    my $localmin=0,;
                   2053: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2054: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   2055: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   2056: 		}
                   2057: 	    }
1.229     sakharuk 2058: 	    if ($max_len[$jn]<$localmin) {
                   2059: 		$max_len[$jn]=$localmin;
                   2060: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2061: 	    }#object size is bigger
                   2062: 	    if ($min_len[$jn]<$localmin) {
                   2063: 		$min_len[$jn]=$localmin;
                   2064: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2065: 	    }#object size is bigger
1.206     sakharuk 2066: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   2067: 		$min_len[$jn]=0;
                   2068: 		$max_len[$jn]=0;
                   2069: 	    }
                   2070: 	}
                   2071:        #final adjustment of column width
                   2072: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   2073: 	my @adjust=();
                   2074:         #step 1. adjustment by maximum value
                   2075: 	my $space_neeeded=0;
                   2076: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2077: 	    $space_neeeded=$space_neeeded+$max_len[$jn];
                   2078: 	}
                   2079: 	if ($space_neeeded<=$available_space) {
                   2080: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2081: 		if ($fwidth[$jn]==0) {
                   2082: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 2083: 		}
1.51      sakharuk 2084: 	    }
1.206     sakharuk 2085: 	} else {
                   2086:         #step 2. adjustment by minimum value (estimation)
                   2087: 	    $space_neeeded=0;
                   2088: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2089: 		$space_neeeded+=$min_len[$jn];
                   2090: 	    }
                   2091: 	    if ($space_neeeded>$available_space) {
                   2092: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   2093: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2094: 		    if ($fwidth[$jn]==0) {
                   2095: 			$fwidth[$jn]=$min_len[$jn];
                   2096: 		    }
                   2097: 		}
1.229     sakharuk 2098: 		#check if we have objects which can be scaled
                   2099: 		my $how_many_to_scale=0;
                   2100: 		my @to_scale=();
                   2101: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2102: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   2103: 			$how_many_to_scale++;
                   2104: 			push @to_scale, $jn;
                   2105: 		    }
                   2106: 		}
                   2107: 		if ($how_many_to_scale>0) {
                   2108: 		    my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
                   2109: 		    foreach my $jn (@to_scale) {
                   2110: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2111: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   2112: 			    if ($1 ne '') {
                   2113: 				my $current_length=&recalc($1);
                   2114: 				$current_length=~/(\d+\.?\d*)/;
                   2115: 				$current_length=$current_length-$space_to_adjust;
                   2116: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   2117: 			    }
                   2118: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   2119: 			    if ($1 ne '') {
                   2120: 				my $current_length=$1;
                   2121: 				$current_length=$current_length-$space_to_adjust;
                   2122: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   2123: 			    }				
                   2124: 			}
                   2125: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   2126: 		    }
                   2127: 		}
1.206     sakharuk 2128: 	    } else {
                   2129: 	      #step 3. adjustment over minimal + corrections
                   2130: 		my $enlarge_coef=$available_space/$space_neeeded;
                   2131: 		my $acsessive=0;
                   2132: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2133: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2134: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2135: 			$fwidth[$jn]=$max_len[$jn];
                   2136: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2137: 			$adjust[$jn]=0;
                   2138: 		    }
                   2139: 		}
                   2140: 		if ($acsessive>0) {
                   2141: 		#we have an excess of space and can redistribute it
                   2142: 		    my $notempty_columns=0;
                   2143: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2144: 			if ($adjust[$jn]!=0) {
                   2145: 			    $notempty_columns++;
                   2146: 			}
                   2147: 		    }
                   2148: 		    my $per_column=$acsessive/$notempty_columns;
                   2149: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2150: 			if ($adjust[$jn]!=0) {
                   2151: 			    $adjust[$jn]+=$per_column;
                   2152: 			    $fwidth[$jn]=$adjust[$jn];
                   2153: 			}
1.223     sakharuk 2154: 		    }
                   2155: 		} else {
                   2156: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2157: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2158: 		    }
                   2159: 		}
1.203     sakharuk 2160: 	    }
                   2161: 	}
1.222     sakharuk 2162:         #use all available width if it is defined in % or as TeXwidth
                   2163:         if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
1.203     sakharuk 2164: 	    my $current=0; 
1.206     sakharuk 2165: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2166: 		$current+=$fwidth[$i];
1.203     sakharuk 2167: 	    }
                   2168: 	    my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
1.206     sakharuk 2169: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2170: 		$fwidth[$i]*=$coef;
                   2171: 	    }
                   2172: 	}
                   2173:         #removing of empty columns if allowed
1.208     sakharuk 2174:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2175: 	if ($permission eq 'yes') {
                   2176: 	    my @cleaned_table=();
                   2177:             my @cleaned_header=();
                   2178: 	    my $colind=0;
                   2179: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2180: 		if ($fwidth[$jn]!=0) {
                   2181: 		    #we need to copy column
                   2182: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2183: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2184: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2185: 		    }
                   2186: 		    $colind++;
                   2187: 		}
1.122     albertel 2188: 	    }
1.206     sakharuk 2189: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2190: 	    @fwidth=@cleaned_header;
1.122     albertel 2191: 	}
1.206     sakharuk 2192: 	#construct header of the table
                   2193: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2194: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2195: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2196: 	}
                   2197: 	$header_of_table .= '}';
1.126     sakharuk 2198: 	#fill the table
                   2199: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.306     foxr     2200: 	    my $have_rowspan = 0;
1.206     sakharuk 2201: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
1.320     foxr     2202: 
                   2203: 		#-----------------------------------------------------------
                   2204:                 #   I think this order of doing things will ensure that
                   2205: 		#   single rowspan, columspan and combined row/colspans will
                   2206:                 #   work correctly.  LaTeX is delicate here.
                   2207: 		#    RF.
                   2208: 
                   2209: 		# Start a rowspan if necessary:
                   2210: 
                   2211: 		my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
                   2212: 		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
1.304     foxr     2213: 		#
                   2214: 		#  Do the appropriate magic if this has a colspan
                   2215: 		# 
1.320     foxr     2216: 
1.304     foxr     2217: 		if ($colspan > 1) {
1.336     foxr     2218: 		    my $spanwidth = 0;
                   2219: 		    for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
                   2220: 			$spanwidth += $fwidth[$spancol];
                   2221: 		    }
1.304     foxr     2222: 		    $output .= '\multicolumn{'.
                   2223: 			$colspan
1.337     foxr     2224: 			."}";
                   2225: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
                   2226: 			$output .= '{|c|}{';
                   2227: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2228: 			$output .= '{|r|}{';
                   2229: 		    }
                   2230: 		    else {
                   2231: 			$output .= "{|p{$spanwidth mm}|}{";
                   2232: 		    }
                   2233: 			
1.304     foxr     2234: 		}
1.306     foxr     2235: 
1.337     foxr     2236: 		# Rowspan... if colspan is 1, and there's an alignment we'll need
                   2237: 		# to kick in a multicolumn in order to get the alignment spec.
                   2238: 		# this must precede the multirow or LaTex gets quite upset.
                   2239: 		# Naturally if colspan > 1 we've already done that above ^
                   2240: 		#
                   2241: 		my $multirow_aligned = 0;
1.306     foxr     2242: 		if ($rowspan > 1) {
1.337     foxr     2243: 		    if ($colspan == 1) {
                   2244: 			if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
                   2245: 			    $output .= '\multicolumn{1}{|c|}{';
                   2246: 			    $multirow_aligned = 1;
                   2247: 			} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2248: 			    $output .= '\multicolumn{1}{|r|}{';
                   2249: 			    $multirow_aligned = 1;
                   2250: 			}
                   2251: 		    }
1.306     foxr     2252: 		    $have_rowspan++;
1.337     foxr     2253: 		    $output .= '\multirow{'.$rowspan.'}[0]{*}{';
                   2254: 		    #
                   2255: 		    # If we did not throw in a multicolumn to align, then add 
                   2256: 		    # an extra {
                   2257: 		    # so we close correctly without having to keep additional state
                   2258: 		    # around
                   2259: 		    #
                   2260: 		    if (!$multirow_aligned) {
                   2261: 			$output .= '{';
                   2262: 		    }
1.306     foxr     2263: 		}
                   2264: 		if (($rowspan eq '^') || ($rowspan eq '_')) {
                   2265: 		    $have_rowspan++;
                   2266: 		}
1.320     foxr     2267: 		#--------------------------------------------------------------
1.306     foxr     2268: 
1.337     foxr     2269: 
                   2270: 		# For right and center alignment of single cells.
                   2271: 		# we are going to use a multicolumn with a span of 1 to specify alignment.
                   2272: 		#
                   2273: 		if ($colspan == 1  && $rowspan == 1) {
                   2274: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
                   2275: 			$output .= '\multicolumn{1}{|c|}{';
                   2276: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2277: 			$output .= '\multicolumn{1}{|r|}{';
                   2278: 		    }
1.206     sakharuk 2279: 		}
1.337     foxr     2280: 
1.206     sakharuk 2281: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
1.337     foxr     2282: 
                   2283: 		if (($colspan == 1 && $rowspan == 1)   &&
                   2284: 		    (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
                   2285: 		     ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
                   2286: 		    $output .= '}';
1.206     sakharuk 2287: 		}
1.337     foxr     2288: 
1.306     foxr     2289: 		# Close off any open multirow:
                   2290: 		
                   2291: 		if ($rowspan > 1) {
1.337     foxr     2292: 		    $output .= '}}';
1.306     foxr     2293: 		}
1.304     foxr     2294: 		#  Close off the colspan...
                   2295: 		#
                   2296: 		if ($colspan > 1)  {
                   2297: 		    $output .= '}';
                   2298: 		    $jn += $colspan-1; # Adjust for number of rows really left.
                   2299: 		}
1.206     sakharuk 2300:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2301: 	    }
1.306     foxr     2302: 	    #  If have_rowspan > 0, and borders are on, then 
                   2303: 	    #  we need to do more than put an \hline at the bottom of row.
                   2304: 	    #  we need to do the appropriate \cline to ensure that
                   2305: 	    #  the spanned rows don't have \hlines through them.
                   2306: 
                   2307: 	    if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
                   2308: 		$output .= ' \\\\ ';
                   2309: 		for (my $jn=0; $jn<=$#fwidth;$jn++) {
                   2310: 		    my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
1.320     foxr     2311: 		    if ($rowspan ne "^") {
                   2312: 			if (($rowspan <= 1) || ($rowspan eq '_')) {
                   2313: 			    my $column = $jn+1;
                   2314: 			    $output .= '\cline{'.$column.'-'.$column.'} ';
                   2315: 			}
1.306     foxr     2316: 		    }
                   2317: 		}
                   2318: 
                   2319: 	    } else {
                   2320: 		$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
                   2321: 	    }
1.122     albertel 2322: 	}
1.281     foxr     2323: 	# Note that \newline destroys alignment env's produced  by e.g. <div>
                   2324: 	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
                   2325: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
1.127     sakharuk 2326: 	if ($#Apache::londefdef::table > 0) {	    
                   2327: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
1.294     foxr     2328: 	    # Figure out max/and min width  by summing us and then
                   2329: 	    # apply that to the current column of the table we nest in
                   2330: 	    # if it's larger than the current width or the current width
                   2331: 	    # is undefined.
                   2332: 	    #
                   2333: 	    my $min_nested_width = 0;
                   2334: 	    my $max_nested_width = 0;
                   2335: 	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
                   2336: 		$min_nested_width +=  $min_len[$col];
                   2337: 		$max_nested_width +=  $max_len[$col];
1.300     foxr     2338: 		
1.294     foxr     2339: 	    }
                   2340: 	    # Fudge in an extra 5 mm for borders etc:
                   2341: 	    
                   2342: 	    $min_nested_width += 5;
                   2343: 	    $max_nested_width += 5;
                   2344: 
                   2345: 	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
                   2346: 	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
                   2347: 	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
                   2348: 		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
                   2349: 	    }
                   2350: 	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
                   2351: 		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
                   2352: 	    }
                   2353: 
1.127     sakharuk 2354: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2355: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2356: 	} else {
                   2357: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2358: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2359: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2360: 	}
1.122     albertel 2361:     }
                   2362:     return $currentstring;
                   2363: }
                   2364: 
1.166     sakharuk 2365: #-- <tr> tag (end tag optional)
1.122     albertel 2366: sub start_tr {
                   2367:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2368:     my $currentstring = '';
1.325     albertel 2369:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2370: 	$currentstring = $token->[4];     
                   2371:     } elsif ($target eq 'tex') {
                   2372: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2373: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2374: 	if ($alignchar ne '') {
1.206     sakharuk 2375: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2376: 	} else {
                   2377: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2378: 	}
                   2379: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
1.300     foxr     2380: 	#
                   2381: 	#  Need to save the number of table columns to preserve the max # columns.
                   2382: 	#
                   2383: 	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
1.122     albertel 2384: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2385: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2386: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2387: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2388: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2389: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.122     albertel 2390:     } 
                   2391:     return $currentstring;
                   2392: }
                   2393:         
                   2394: sub end_tr {
1.160     sakharuk 2395:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2396:     my $currentstring = &end_p();	# Close any pending <p> in the row.
1.325     albertel 2397:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2398: 	$currentstring .= $token->[2];     
1.122     albertel 2399:     } elsif ($target eq 'tex') {
1.160     sakharuk 2400: 	if ($Apache::londefdef::TD_redirection) {
                   2401: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2402: 	}
1.300     foxr     2403: 	# Counter columns must be the maximum number of columns seen
                   2404: 	# in the table so far so:
                   2405: 	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
                   2406: 	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
                   2407: 	}
1.295     foxr     2408: 
                   2409: 
1.294     foxr     2410: 	
1.122     albertel 2411:     }
                   2412:     return $currentstring;
                   2413: }
                   2414: 
1.166     sakharuk 2415: #-- <td> tag (end tag optional)
1.122     albertel 2416: sub start_td {
                   2417:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2418:     my $currentstring = '';
1.325     albertel 2419:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2420: 	$currentstring = $token->[4];     
                   2421:     } elsif ($target eq 'tex') {
1.160     sakharuk 2422: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2423: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2424:     } 
                   2425:     return $currentstring;
                   2426: }   
1.159     sakharuk 2427:     
                   2428: sub tag_check {
                   2429:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2430:     my @ar=@$parstack; 
                   2431:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2432: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2433: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2434: 	    last;
                   2435: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2436: 	    splice @ar, $i+1;
                   2437: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2438: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2439: 	    last;
1.159     sakharuk 2440: 	}
1.160     sakharuk 2441:     }
1.159     sakharuk 2442:     return '';
                   2443: }
                   2444:  
                   2445: sub start_td_tex {
                   2446:     my ($parstack,$parser,$safeeval) = @_;
1.206     sakharuk 2447:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2448:     if ($alignchar eq '') {
                   2449: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2450:     }
1.206     sakharuk 2451:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2452:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2453:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2454:     if (defined $TeXwidth) {		
                   2455: 	my $current_length=&recalc($TeXwidth);
                   2456: 	$current_length=~/(\d+\.?\d*)/;
                   2457: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2458:     }
1.159     sakharuk 2459:     &Apache::lonxml::startredirection();
                   2460:     return '';
                   2461: }
                   2462: 
                   2463: sub end_td_tex {
                   2464:     my ($parstack,$parser,$safeeval) = @_;
1.304     foxr     2465:     my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
                   2466:     my $current_column = $Apache::londefdef::table[-1]{'counter_columns'}; 
1.303     foxr     2467:     my $data = &Apache::lonxml::endredirection();
                   2468: 
1.305     foxr     2469:     #  The rowspan array of the table indicates which cells are part of a span.
                   2470:     #  n indicates the start of a span set of n rows.
                   2471:     #  ^ indicates a cell that continues a span set.
1.306     foxr     2472:     #  _ indicates the cell is at the bottom of a span set.
1.305     foxr     2473:     #  If this and subsequent cells are part of a rowspan, we must
                   2474:     #  push along the row until we find one that is not.
                   2475: 
                   2476:     while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column]) 
1.306     foxr     2477: 	   && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
1.305     foxr     2478: 	# Part of a span.
                   2479: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
                   2480: 	$current_column++;
                   2481:     }
                   2482:     $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
                   2483:    
                   2484: 
1.320     foxr     2485:     # Get the column and row spans.
                   2486:     # Colspan can be done via \multicolumn if I can figure out the data structs.
                   2487: 
                   2488:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
                   2489:     if (!$colspan) {
                   2490: 	$colspan = 1;
                   2491:     }
1.305     foxr     2492: 
                   2493:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
                   2494:     if (!$rowspan) {
                   2495: 	$rowspan = 1;
                   2496:     }
                   2497: 
1.303     foxr     2498: 
1.305     foxr     2499: 
1.320     foxr     2500:     for (my $c = 0; $c < $colspan; $c++) {
                   2501: 	$Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
                   2502: 	for (my $i = 1; $i < $rowspan; $i++) {
                   2503: 	    $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
                   2504: 	    if ($i == ($rowspan-1)) {
                   2505: 		$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
                   2506: 	    }
1.306     foxr     2507: 	}
1.305     foxr     2508:     }
1.304     foxr     2509: 
1.159     sakharuk 2510:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2511:     if (defined $TeXwidth) {		
1.206     sakharuk 2512: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2513: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2514: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.159     sakharuk 2515:     } else {
1.206     sakharuk 2516: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2517: 	    my $garbage_data=$data;
                   2518: 	    my $fwidth=0;
                   2519:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2520: 		my $current_length=&recalc($1);
                   2521: 		$current_length=~/(\d+\.?\d*)/;
                   2522: 		if ($fwidth<$1) {$fwidth=$1;}
                   2523: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2524: 	    }
                   2525:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2526: 		my $current_length=$1;
                   2527: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2528: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2529: 	    }
                   2530: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2531: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2532: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2533: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.231     sakharuk 2534: 	} elsif ($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)*/) {
                   2535: 	    my $garbage_data=$data;
                   2536: 	    my $fwidth=0;
                   2537:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2538: 		my $current_length=&recalc($1);
                   2539: 		$current_length=~/(\d+\.?\d*)/;
                   2540: 		if ($fwidth<$1) {$fwidth=$1;}
                   2541: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2542: 	    }
                   2543:             while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2544: 		my $current_length=&recalc($1);
                   2545: 		$current_length=~/(\d+\.?\d*)/;
                   2546: 		if ($fwidth<$1) {$fwidth=$1;}
                   2547: 		$garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2548: 	    }
                   2549: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2550: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2551: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2552: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2553: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2554: 	} else {  
1.166     sakharuk 2555: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2556: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2557: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2558: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2559: 	    if ($data=~/\\vskip/) {
                   2560:                 my $newdata=$data;
                   2561: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2562: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2563: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2564: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2565: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2566:                     my @words=split(/ /,$elementdata);
                   2567: 		    foreach my $word (@words) {
                   2568: 			my $lengthword=2.5*&LATEX_length($word);
                   2569: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2570: 		    }
1.166     sakharuk 2571: 		}
                   2572: 	    } else {
1.206     sakharuk 2573: 		$current_length=2.5*&LATEX_length($data);
                   2574:                     my @words=split(/ /,$data);
                   2575: 		    foreach my $word (@words) {
1.228     sakharuk 2576: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2577: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2578: 		    }
1.166     sakharuk 2579: 	    }
1.206     sakharuk 2580: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2581: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2582: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2583: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
1.159     sakharuk 2584: 	}        
                   2585:     }
1.302     foxr     2586:     # Substitute all of the tables nested in this cell in their appropriate places.
                   2587: 
                   2588: 
                   2589:     my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
                   2590:     for (my $in=0; $in<=$nested_count; $in++) {    
1.301     foxr     2591: 	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
                   2592: 	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
                   2593: 	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2594: 	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
                   2595: 
                   2596:     }
                   2597:     # Should be be killing off the 'include' elements as they're used up?
1.305     foxr     2598: 
1.206     sakharuk 2599:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.305     foxr     2600: 
1.304     foxr     2601: 
                   2602: 
                   2603: 
                   2604:     #  the colspan array will indicate how many columns will be spanned by this
                   2605:     #  cell..this requires that counter_columns also be adjusted accordingly
                   2606:     #  so that the next bunch of text goes in the right cell.  Note that since
                   2607:     #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
                   2608:     #
                   2609: 
                   2610:     $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
                   2611:     for (my $i = 0; $i < ($colspan -1); $i++) {
                   2612: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
                   2613:     }
1.320     foxr     2614:     for (my $r = 0; $r < $rowspan; $r++) {
                   2615: 	$Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
                   2616: 	# Put empty text in spanned cols.
                   2617: 	
                   2618:     }
                   2619: 
1.304     foxr     2620: 
                   2621: 
1.301     foxr     2622:     return '';
1.159     sakharuk 2623: }
                   2624: 
1.122     albertel 2625: sub end_td {
1.126     sakharuk 2626:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2627:     my $currentstring = '';
1.325     albertel 2628:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2629: 	$currentstring = $token->[2];     
                   2630:     } elsif ($target eq 'tex') {
1.160     sakharuk 2631:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2632: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2633:     }
                   2634:     return $currentstring;
                   2635: }
                   2636: 
1.166     sakharuk 2637: #-- <th> tag (end tag optional)
1.122     albertel 2638: sub start_th {
                   2639:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2640:     my $currentstring = '';
1.325     albertel 2641:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2642: 	$currentstring = $token->[4];     
                   2643:     } elsif ($target eq 'tex') {
1.230     sakharuk 2644: 	$Apache::londefdef::TD_redirection = 1;
                   2645: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2646:     } 
                   2647:     return $currentstring;
1.130     sakharuk 2648: }   
1.230     sakharuk 2649:     
                   2650: sub tagg_check {
                   2651:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2652:     my @ar=@$parstack; 
                   2653:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2654: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2655: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2656: 	    last;
                   2657: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2658: 	    splice @ar, $i+1;
                   2659: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   2660: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2661: 	    last;
                   2662: 	}
                   2663:     }
                   2664:     return '';
                   2665: }
                   2666:  
                   2667: sub start_th_tex {
                   2668:     my ($parstack,$parser,$safeeval) = @_;
                   2669:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2670:     if ($alignchar eq '') {
                   2671: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   2672:     }
                   2673:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   2674:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   2675:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2676:     if (defined $TeXwidth) {		
                   2677: 	my $current_length=&recalc($TeXwidth);
                   2678: 	$current_length=~/(\d+\.?\d*)/;
                   2679: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2680:     }
                   2681:     &Apache::lonxml::startredirection();
                   2682:     return '';
                   2683: }
                   2684: 
                   2685: sub end_th_tex {
                   2686:     my ($parstack,$parser,$safeeval) = @_;
                   2687:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   2688:     my $data=&Apache::lonxml::endredirection();
                   2689:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2690:     if (defined $TeXwidth) {		
                   2691: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2692: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2693: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2694:     } else {
                   2695: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2696: 	    my $garbage_data=$data;
                   2697: 	    my $fwidth=0;
                   2698:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2699: 		my $current_length=&recalc($1);
                   2700: 		$current_length=~/(\d+\.?\d*)/;
                   2701: 		if ($fwidth<$1) {$fwidth=$1;}
                   2702: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2703: 	    }
                   2704:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2705: 		my $current_length=$1;
                   2706: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2707: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2708: 	    }
                   2709: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2710: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2711: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2712: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2713: 	} else {  
                   2714: 	    $data=~s/^\s+(\S.*)/$1/; 
                   2715: 	    $data=~s/(.*\S)\s+$/$1/;
                   2716: 	    $data=~s/(\s)+/$1/;
                   2717: 	    my ($current_length,$min_length)=(0,0);
                   2718: 	    if ($data=~/\\vskip/) {
                   2719:                 my $newdata=$data;
                   2720: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2721: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2722: 		foreach my $elementdata (@newdata) {
                   2723: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   2724: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   2725:                     my @words=split(/ /,$elementdata);
                   2726: 		    foreach my $word (@words) {
                   2727: 			my $lengthword=2.5*&LATEX_length($word);
                   2728: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2729: 		    }
                   2730: 		}
                   2731: 	    } else {
                   2732: 		$current_length=2.5*&LATEX_length($data);
                   2733:                     my @words=split(/ /,$data);
                   2734: 		    foreach my $word (@words) {
                   2735: 			my $lengthword=2*&LATEX_length($word);
                   2736: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2737: 		    }
                   2738: 	    }
                   2739: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2740: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2741: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2742: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2743: 	}        
                   2744:     }
                   2745: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   2746: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2747: 	}
                   2748:     #make data bold
                   2749:     $data='\textbf{'.$data.'}';
                   2750:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
                   2751:     return'';
                   2752: }
                   2753: 
1.122     albertel 2754: sub end_th {
1.130     sakharuk 2755:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2756:     my $currentstring = &end_p();	# Close any open <p> in the row.
1.325     albertel 2757:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2758: 	$currentstring .= $token->[2];     
1.122     albertel 2759:     } elsif ($target eq 'tex') {
1.230     sakharuk 2760:         $Apache::londefdef::TD_redirection =0;
                   2761: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 2762:     }
                   2763:     return $currentstring;
                   2764: }
1.230     sakharuk 2765:      
1.181     sakharuk 2766: #-- <img> tag (end tag forbidden)
1.249     foxr     2767: #
                   2768: #  Render the <IMG> tag.
                   2769: #     <IMG> has the following attributes (in addition to the 
                   2770: #     standard HTML ones:
                   2771: #      TeXwrap   - Governs how the tex target will try to wrap text around
                   2772: #                  horizontally aligned images.
                   2773: #      TeXwidth  - The width of the image when rendered for print (mm).
                   2774: #      TeXheight - The height of the image when rendered for print (mm)
                   2775: #         (Note there seems to also be support for this as a % of page size)
                   2776: #      
1.122     albertel 2777: sub start_img {
1.299     albertel 2778:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel 2779:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   2780: 					 undef,1);
1.325     albertel 2781:     if (! $src && 
                   2782: 	($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
                   2783: 	) { 
1.299     albertel 2784: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
1.189     albertel 2785: 	return '';
                   2786:     }
1.290     albertel 2787:     &Apache::lonxml::extlink($src);
1.122     albertel 2788:     my $currentstring = '';
                   2789:     my $scaling = .3;
1.249     foxr     2790: 
                   2791:    # Render unto browsers that which are the browser's...
                   2792: 
1.325     albertel 2793:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 2794: 	if ($env{'browser.imagesuppress'} ne 'on') {
1.322     albertel 2795: 	    my $enc = ('yes' eq 
                   2796: 		       lc(&Apache::lonxml::get_param('encrypturl',$parstack,
                   2797: 						     $safeeval)));
                   2798: 	    $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
                   2799: 							 $enc);
1.122     albertel 2800: 	} else {
1.322     albertel 2801: 	    my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
                   2802: 						    undef,1);
                   2803: 	    if (!$alttag) {
                   2804: 		$alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   2805: 						   $src);
1.51      sakharuk 2806: 	    }
1.158     sakharuk 2807: 	    $currentstring.='[IMAGE: '.$alttag.']';
1.1       sakharuk 2808: 	}
1.249     foxr     2809: 
                   2810: 	# and render unto TeX that which is LaTeX
                   2811: 
1.122     albertel 2812:     } elsif ($target eq 'tex') {
1.248     foxr     2813: 	#
                   2814: 	#  The alignment will require some superstructure to be put around
                   2815: 	#  the \includegraphics stuff.  At present we can only partially
                   2816: 	#  simulate the alignments offered by html.
                   2817: 	#
                   2818: 	#
                   2819: 	my $align = lc(&Apache::lonxml::get_param('align', 
                   2820: 						  $parstack,
                   2821: 						  $safeeval,
                   2822: 						  undef,1));
                   2823: 	if(!$align) {
1.287     foxr     2824: 		$align = "bottom";	# This is html's default so it's ours too.
1.248     foxr     2825: 	}
                   2826: 	#
                   2827: 	&Apache::lonxml::debug("Alignemnt = $align");
                   2828: 	#  LaTeX's image/text wrapping is really bad since it wants to
                   2829: 	#  make figures float.  
                   2830:         #   The user has the optional parameter (applicable only to l/r
                   2831: 	# alignment to use the picins/parpic directive to get wrapped text
                   2832: 	# this is also imperfect.. that's why we give them a choice...
                   2833: 	# so they can't yell at us for our choice.
                   2834: 	#
                   2835: 	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
                   2836: 							    $parstack,
                   2837: 							    $safeeval,
                   2838: 							    undef,0);
1.312     foxr     2839: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
1.248     foxr     2840: 	if(!$latex_rendering) {
1.312     foxr     2841: 		$latex_rendering = "texwrap";
                   2842: 	}
                   2843: 	# using texwrap inside a table does not work. So, if after all of this,
                   2844: 	# texwrap is on, we turn it off if we detect we're in a table:
                   2845: 	#
                   2846: 	if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
                   2847: 	    $latex_rendering = 'parpic';
1.248     foxr     2848: 	}
1.323     foxr     2849: 
1.312     foxr     2850: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
1.248     foxr     2851: 
1.256     albertel 2852: 	#if original gif/jpg/png file exist do following:
1.266     albertel 2853: 	my $origsrc=$src;
1.256     albertel 2854: 	my ($path,$file) = &get_eps_image($src);
1.341     foxr     2855: 	# &Apache::lonnet::logthis("Image source: $src result: $path $file");
1.122     albertel 2856: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.261     foxr     2857: 	&Apache::lonxml::debug("path = $path file = $file src = $src");
1.192     sakharuk 2858: 	if (-e $src) {
1.261     foxr     2859: 	    &Apache::lonxml::debug("$src exists");
1.256     albertel 2860: 	    my ($height_param,$width_param)=
1.266     albertel 2861: 		&image_size($origsrc,0.3,$parstack,$safeeval);
                   2862: 	    my $size;
                   2863: 	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
                   2864: 	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
1.341     foxr     2865: 	    # Default size if not able to extract that (e.g. eps image).
                   2866: 	    
                   2867: 	    # &Apache::lonnet::logthis("Size = $size");
                   2868: 	    
1.266     albertel 2869: 	    $size='['.$size;
                   2870: 	    $size=~s/,$/]/; 
1.344     albertel 2871: 	    $currentstring .= '\graphicspath{{'.$path.'}}'
                   2872: 		.'\includegraphics'.$size.'{'.$file.'} ';
1.256     albertel 2873: 
1.248     foxr     2874: 	    #    If there's an alignment specification we need to honor it here.
                   2875: 	    #    For the horizontal alignments, we will also honor the
                   2876: 	    #    value of the latex specfication.  The default is parbox,
                   2877: 	    #    and that's used for illegal values too.  
                   2878: 	    #    
                   2879: 	    #    Even though we set a default alignment value, the user
                   2880: 	    #    could have given us an illegal value.  In that case we
                   2881: 	    #    just use the default alignment of bottom..
                   2882: 	    if      ($align eq "top")    {
                   2883: 		$currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
                   2884: 	    } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
                   2885: 		my $offset = $height_param/2;
                   2886: 		$currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
                   2887: 	    } elsif ($align eq "left")   { 
                   2888: 		if ($latex_rendering eq "parpic") { 
                   2889: 		    $currentstring = '\parpic[l]{'.$currentstring.'}';
1.286     foxr     2890: 		} else {    	                                 # wrapfig render
                   2891: 		    $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
                   2892: 			.'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
1.248     foxr     2893: 		}
                   2894: 	    } elsif ($align eq "right")  {   
                   2895: 		if ($latex_rendering eq "parpic") {
                   2896: 		    $currentstring = '\parpic[r]{'.$currentstring.'}';
1.286     foxr     2897: 		} else {	                                 # wrapfig rendering
                   2898: 		    $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
                   2899: 			.'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
                   2900: 
1.248     foxr     2901: 		}
                   2902: 	    } else {		# Bottom is also default.
                   2903: 		# $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
                   2904: 	    }
1.122     albertel 2905: 	} else {
1.261     foxr     2906: 	    &Apache::lonxml::debug("$src does not exist");
1.122     albertel 2907: 	    #original image file doesn't exist so check the alt attribute
                   2908: 	    my $alt = 
                   2909: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   2910: 	    unless ($alt) {
                   2911: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   2912: 	    }
                   2913: 
1.256     albertel 2914: 	    if ($alt) { $currentstring .= ' '.$alt.' '; }
1.59      sakharuk 2915: 	}
1.249     foxr     2916: 
                   2917: 	# And here's where the semi-quote breaks down: allow the user
                   2918:         # to edit the beast as well by rendering the problem for edit:
1.186     albertel 2919:     } elsif ($target eq 'edit') {
                   2920: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   2921: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
                   2922: 	    &Apache::edit::browse('src',undef,'alt').' '.
                   2923: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   2924: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   2925: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   2926: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   2927: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   2928: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 2929: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   2930: 						   ['','bottom','middle','top','left','right'],$token,5);
1.249     foxr     2931: 	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
                   2932: 						   ['', 'parbox', 'parpic'], $token, 2);
1.332     www      2933: 	$currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
1.322     albertel 2934: 						   ['no','yes'], $token, 2);
1.186     albertel 2935: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.249     foxr     2936: 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
                   2937: 	my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   2938: 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
                   2939: 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
                   2940: 
                   2941: 
1.186     albertel 2942: 	$currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   2943: 	if ($width) { $currentstring.=' width="'.$width.'" '; }
                   2944: 	if ($height) { $currentstring.=' height="'.$height.'" '; }
                   2945: 	$currentstring .= ' />';
                   2946:     } elsif ($target eq 'modified') {
1.210     albertel 2947: 	my ($osrc,$owidth,$oheight)=
                   2948: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2949: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 2950: 					     $safeeval,'src','alt','align',
1.249     foxr     2951: 					     'TeXwidth','TeXheight', 'TeXwrap',
1.322     albertel 2952: 					     'width','height','encrypturl');
1.210     albertel 2953: 	my ($nsrc,$nwidth,$nheight)=
                   2954: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2955: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   2956: 	&image_replication($loc);
                   2957: 	my ($iwidth,$iheight);
                   2958: 	if (-e $loc) {
                   2959: 	    my $image = Image::Magick->new;
                   2960: 	    $image->Read($loc);
                   2961: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   2962: 				   $image->Get('height'));
                   2963: 	}
                   2964: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   2965: 	    # changed image or no size specified,
                   2966:             # if they didn't explicitly change the 
                   2967:             # width or height use the ones from the image
                   2968: 	    if ($iwidth && $iheight) {
                   2969: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   2970: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   2971: 		}
                   2972: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   2973: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 2974: 		}
                   2975: 	    }
                   2976: 	}
1.210     albertel 2977: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   2978: 	# if we don't have a width or height
                   2979: 	if ($iwidth && $cwidth && !$cheight) {
                   2980: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   2981: 	}
                   2982: 	if ($iheight && $cheight && !$cwidth) {
                   2983: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   2984: 	}
                   2985: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 2986:     }
1.261     foxr     2987: 
1.122     albertel 2988:     return $currentstring;
                   2989: }
                   2990: 
                   2991: sub end_img {
                   2992:     my ($target,$token) = @_;
                   2993:     my $currentstring = '';
1.325     albertel 2994:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2995: 	$currentstring = $token->[2];
                   2996:     } elsif ($target eq 'tex') {
                   2997: 	$currentstring = '';
                   2998:     }
                   2999:     return $currentstring;
                   3000: }
                   3001: 
1.181     sakharuk 3002: #-- <applet> tag (end tag required)
1.122     albertel 3003: sub start_applet {
                   3004:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3005:     
                   3006:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
1.290     albertel 3007:     &Apache::lonxml::extlink($code);
1.122     albertel 3008:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   3009: 					   undef,1);
1.290     albertel 3010:     &Apache::lonxml::extlink($archive);
1.122     albertel 3011:     my $currentstring = '';
1.325     albertel 3012:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3013: 	if ($env{'browser.appletsuppress'} ne 'on') {
1.250     albertel 3014: 	    $currentstring = &Apache::lonenc::encrypt_ref($token,
                   3015: 							  {'code'=>$code,
                   3016: 							   'archive'=>$archive}
                   3017: 							  );
1.122     albertel 3018: 	} else {
                   3019: 	    my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3020: 						   $safeeval,undef,1);
                   3021: 	    unless ($alttag) {
                   3022: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3023: 						 $code);
1.44      sakharuk 3024: 	    }
1.122     albertel 3025: 	    $currentstring='[APPLET: '.$alttag.']';
1.1       sakharuk 3026: 	}
1.122     albertel 3027:     } elsif ($target eq 'tex') {
1.177     albertel 3028: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3029: 					       $safeeval,undef,1);
                   3030: 	unless ($alttag) {
                   3031: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   3032: 						undef,1);
                   3033: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3034: 					     $code);
1.175     sakharuk 3035: 	}
1.177     albertel 3036: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   3037: 	    '.}\end{center}';
1.122     albertel 3038:     } 
                   3039:     return $currentstring;
                   3040: }
                   3041: 
                   3042: sub end_applet {
                   3043:     my ($target,$token) = @_;
                   3044:     my $currentstring = '';
1.325     albertel 3045:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3046: 	$currentstring = $token->[2];
                   3047:     } elsif ($target eq 'tex') {
                   3048:     } 
                   3049:     return $currentstring;
                   3050: }
                   3051: 
1.181     sakharuk 3052: #-- <embed> tag (end tag optional/required)
1.122     albertel 3053: sub start_embed {    
                   3054:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3055:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3056:     &Apache::lonxml::extlink($src);
1.122     albertel 3057:     my $currentstring = '';
1.325     albertel 3058:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3059: 	if ($env{'browser.embedsuppress'} ne 'on') {
1.250     albertel 3060: 	    $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 3061: 	} else {
                   3062: 	    my $alttag=&Apache::lonxml::get_param
                   3063: 		('alt',$parstack,$safeeval,undef,1);
                   3064: 	    unless ($alttag) {
                   3065: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
1.42      albertel 3066: 	    }
1.122     albertel 3067: 	    $currentstring='[EMBED: '.$alttag.']';
1.10      www      3068: 	}
1.122     albertel 3069:     } elsif ($target eq 'tex') {
                   3070:     } 
                   3071:     return $currentstring;
                   3072: }
                   3073: 
                   3074: sub end_embed {
                   3075:     my ($target,$token) = @_;
                   3076:     my $currentstring = '';
1.325     albertel 3077:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3078: 	$currentstring = $token->[2];     
1.175     sakharuk 3079:     } elsif ($target eq 'tex') {  
1.122     albertel 3080:     } 
                   3081:     return $currentstring;
                   3082: }
                   3083: 
1.181     sakharuk 3084: #-- <param> tag (end tag forbidden)
1.122     albertel 3085: sub start_param {
                   3086:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.290     albertel 3087:     if (&Apache::lonxml::get_param('name',$parstack,
                   3088: 				   $safeeval,undef,1)=~/^cabbase$/i) {
                   3089: 	my $value=&Apache::lonxml::get_param('value',$parstack,
                   3090: 					     $safeeval,undef,1);
                   3091: 	&Apache::lonxml::extlink($value);
                   3092:     } 
                   3093:   
                   3094:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3095:     &Apache::lonxml::extlink($src);
1.122     albertel 3096:     my $currentstring = '';
1.325     albertel 3097:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 3098: 	my %toconvert;
                   3099: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3100: 	if ($src) { $toconvert{'src'}= $src; }
                   3101: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
                   3102: 					    undef,1);
1.251     albertel 3103: 	if ($name=~/^cabbase$/i) {
                   3104: 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
                   3105: 							   $safeeval,undef,1);
                   3106: 	}
1.250     albertel 3107: 	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
1.122     albertel 3108:     } elsif ($target eq 'tex') {
                   3109:     } 
                   3110:     return $currentstring;
                   3111: }
                   3112: 
                   3113: sub end_param {
                   3114:     my ($target,$token) = @_;
                   3115:     my $currentstring = '';
1.325     albertel 3116:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3117: 	$currentstring = $token->[2];     
                   3118:     } elsif ($target eq 'tex') {
                   3119:     } 
                   3120:     return $currentstring;
                   3121: }
                   3122: 
                   3123: #-- <allow> tag
                   3124: sub start_allow {
                   3125:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3126:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3127:     &Apache::lonxml::extlink($src);
                   3128: 
1.241     albertel 3129:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 3130:     my $result;
                   3131:     if ($target eq 'edit') {
                   3132: 	$result .=&Apache::edit::tag_start($target,$token);
                   3133: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   3134: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   3135:     } elsif ($target eq 'modified') {
                   3136: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   3137: 						     $safeeval,'src');
                   3138: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   3139:     }
                   3140:     return $result;
                   3141: }
                   3142: 
                   3143: sub end_allow {
                   3144:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3145:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   3146:     return '';
                   3147: }
1.119     www      3148: 
1.181     sakharuk 3149: #-- Frames (end tag required)
                   3150: #-- <frameset>
1.122     albertel 3151: sub start_frameset {
                   3152:     my ($target,$token) = @_;
1.277     foxr     3153:     my $currentstring = '';	# Close any pending para.
1.325     albertel 3154:     if ($target eq 'web' || $target eq 'webgrade') { 
1.328     albertel 3155: 	$currentstring = 
                   3156: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
                   3157: 					   $Apache::londefdef::head,
                   3158: 					   {'add_entries'    => $token->[2],
                   3159: 					    'no_title'       => 1,
                   3160: 					    'force_register' => 1,
                   3161: 					    'frameset'       => 1,});
                   3162: 
1.122     albertel 3163:     }
                   3164:     return $currentstring;
                   3165: }
                   3166: 
                   3167: sub end_frameset {
                   3168:     my ($target,$token) = @_;
                   3169:     my $currentstring = '';
1.325     albertel 3170:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3171: 	$currentstring = $token->[2];
                   3172:     }
                   3173:     return $currentstring;
                   3174: }
1.162     sakharuk 3175: 
1.181     sakharuk 3176: #-- <xmp> (end tag required)
1.162     sakharuk 3177: sub start_xmp {
                   3178:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3179:     my $currentstring = '';
1.325     albertel 3180:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3181: 	$currentstring .= $token->[4];
                   3182:     } elsif ($target eq 'tex') {
                   3183: 	$currentstring .= '\begin{verbatim}';
                   3184:     } 
                   3185:     return $currentstring;
                   3186: }
                   3187: 
                   3188: sub end_xmp {
                   3189:     my ($target,$token) = @_;
                   3190:     my $currentstring = '';
1.325     albertel 3191:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3192: 	$currentstring .= $token->[2];
                   3193:     } elsif ($target eq 'tex') {
                   3194: 	$currentstring .= '\end{verbatim}';
                   3195:     }
                   3196:     return $currentstring;
                   3197: }
                   3198: 
1.181     sakharuk 3199: #-- <pre> (end tag required)
1.122     albertel 3200: sub start_pre {
1.126     sakharuk 3201:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3202:     my $currentstring = &end_p();	# close off pending <p>
1.325     albertel 3203:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3204: 	$currentstring .= $token->[4];
                   3205:     } elsif ($target eq 'tex') {
1.136     sakharuk 3206: 	$currentstring .= '\begin{verbatim}';
1.319     albertel 3207: 	&Apache::lonxml::disable_LaTeX_substitutions();
1.122     albertel 3208:     } 
                   3209:     return $currentstring;
                   3210: }
                   3211: 
                   3212: sub end_pre {
                   3213:     my ($target,$token) = @_;
                   3214:     my $currentstring = '';
1.325     albertel 3215:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3216: 	$currentstring .= $token->[2];
                   3217:     } elsif ($target eq 'tex') {
1.136     sakharuk 3218: 	$currentstring .= '\end{verbatim}';
1.319     albertel 3219: 	&Apache::lonxml::enable_LaTeX_substitutions();
1.122     albertel 3220:     }
                   3221:     return $currentstring;
                   3222: }
                   3223: 
                   3224: #-- <insert>
                   3225: sub start_insert {
                   3226:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3227:     my $currentstring = '';
1.325     albertel 3228:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3229: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3230: 	$currentstring .= '<b>'.$display.'</b>';;
                   3231:     }
                   3232:     return $currentstring;
                   3233: }
                   3234: 
                   3235: sub end_insert {
                   3236:     my ($target,$token) = @_;
                   3237:     my $currentstring = '';
1.325     albertel 3238:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3239: 	$currentstring .= '';
                   3240:     }
                   3241:     return $currentstring;
                   3242: }
                   3243: 
                   3244: #-- <externallink>
                   3245: sub start_externallink {
                   3246:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3247:     my $currentstring = '';
1.325     albertel 3248:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3249: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3250: 	$currentstring .= '<b>'.$display.'</b>';;
                   3251:     }
                   3252:     return $currentstring;
                   3253: }
                   3254: 
                   3255: sub end_externallink {
                   3256:     my ($target,$token) = @_;
                   3257:     my $currentstring = '';
1.325     albertel 3258:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3259: 	$currentstring .= '';
                   3260:     }
                   3261:     return $currentstring;
                   3262: }
                   3263: 
                   3264: #-- <blankspace heigth="">
                   3265: sub start_blankspace {
                   3266:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3267:     my $currentstring = &end_p();	# closes off any unclosed <p>
1.122     albertel 3268:     if ($target eq 'tex') {
                   3269: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   3270: 	$currentstring .= '\vskip '.$howmuch.' ';
                   3271:     }
                   3272:     return $currentstring;
                   3273: }
                   3274: 
                   3275: sub end_blankspace {
                   3276:     my ($target,$token) = @_;
                   3277:     my $currentstring = '';
                   3278:     if ($target eq 'tex') {
                   3279: 	$currentstring .= '';
                   3280:     }
                   3281:     return $currentstring;
                   3282: }
                   3283: 
1.181     sakharuk 3284: #-- <abbr> tag (end tag required)
1.122     albertel 3285: sub start_abbr {
                   3286:     my ($target,$token) = @_;
                   3287:     my $currentstring = '';
1.325     albertel 3288:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3289: 	$currentstring = $token->[4];     
                   3290:     } 
                   3291:     return $currentstring;
                   3292: }
                   3293: 
                   3294: sub end_abbr {
                   3295:     my ($target,$token) = @_;
                   3296:     my $currentstring = '';
1.325     albertel 3297:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3298: 	$currentstring = $token->[2];    
                   3299:     } 
                   3300:     return $currentstring;
                   3301: }
                   3302: 
1.181     sakharuk 3303: #-- <acronym> tag (end tag required)
1.122     albertel 3304: sub start_acronym {
                   3305:     my ($target,$token) = @_;
                   3306:     my $currentstring = '';
1.325     albertel 3307:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3308: 	$currentstring = $token->[4];     
                   3309:     } 
                   3310:     return $currentstring;
                   3311: }
                   3312: 
                   3313: sub end_acronym {
                   3314:     my ($target,$token) = @_;
                   3315:     my $currentstring = '';
1.325     albertel 3316:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3317: 	$currentstring = $token->[2];    
                   3318:     } 
                   3319:     return $currentstring;
                   3320: }
                   3321: 
1.181     sakharuk 3322: #-- <area> tag (end tag forbidden)
1.122     albertel 3323: sub start_area {
                   3324:     my ($target,$token) = @_;
                   3325:     my $currentstring = '';
1.325     albertel 3326:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3327: 	$currentstring = $token->[4];     
                   3328:     } 
                   3329:     return $currentstring;
                   3330: }
                   3331: 
                   3332: sub end_area {
                   3333:     my ($target,$token) = @_;
                   3334:     my $currentstring = '';
1.325     albertel 3335:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3336: 	$currentstring = $token->[2];    
                   3337:     } 
                   3338:     return $currentstring;
                   3339: }
                   3340: 
1.181     sakharuk 3341: #-- <base> tag (end tag forbidden)
1.122     albertel 3342: sub start_base {
                   3343:     my ($target,$token) = @_;
                   3344:     my $currentstring = '';
1.325     albertel 3345:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3346: 	$currentstring = $token->[4];     
1.161     sakharuk 3347:     }
1.122     albertel 3348:     return $currentstring;
                   3349: }
                   3350: 
                   3351: sub end_base {
                   3352:     my ($target,$token) = @_;
                   3353:     my $currentstring = '';
1.325     albertel 3354:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3355: 	$currentstring = $token->[2];    
                   3356:     } 
                   3357:     return $currentstring;
                   3358: }
                   3359: 
1.181     sakharuk 3360: #-- <bdo> tag (end tag required)
1.122     albertel 3361: sub start_bdo {
                   3362:     my ($target,$token) = @_;
                   3363:     my $currentstring = '';
1.325     albertel 3364:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3365: 	$currentstring = $token->[4];     
                   3366:     } 
                   3367:     return $currentstring;
                   3368: }
                   3369: 
                   3370: sub end_bdo {
                   3371:     my ($target,$token) = @_;
                   3372:     my $currentstring = '';
1.325     albertel 3373:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3374: 	$currentstring = $token->[2];    
                   3375:     } 
                   3376:     return $currentstring;
                   3377: }
                   3378: 
1.181     sakharuk 3379: #-- <bgsound> tag (end tag optional)
1.122     albertel 3380: sub start_bgsound {
                   3381:     my ($target,$token) = @_;
                   3382:     my $currentstring = '';
1.325     albertel 3383:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3384: 	$currentstring = $token->[4];     
                   3385:     } 
                   3386:     return $currentstring;
                   3387: }
                   3388: 
                   3389: sub end_bgsound {
                   3390:     my ($target,$token) = @_;
                   3391:     my $currentstring = '';
1.325     albertel 3392:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3393: 	$currentstring = $token->[2];    
                   3394:     } 
                   3395:     return $currentstring;
                   3396: }
                   3397: 
1.181     sakharuk 3398: #-- <blink> tag (end tag required)
1.122     albertel 3399: sub start_blink {
                   3400:     my ($target,$token) = @_;
                   3401:     my $currentstring = '';
1.325     albertel 3402:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3403: 	$currentstring = $token->[4];     
                   3404:     } 
                   3405:     return $currentstring;
                   3406: }
                   3407: 
                   3408: sub end_blink {
                   3409:     my ($target,$token) = @_;
                   3410:     my $currentstring = '';
1.325     albertel 3411:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3412: 	$currentstring = $token->[2];    
                   3413:     } 
                   3414:     return $currentstring;
                   3415: }
                   3416: 
1.181     sakharuk 3417: #-- <blockquote> tag (end tag required)
1.122     albertel 3418: sub start_blockquote {
                   3419:     my ($target,$token) = @_;
1.279     foxr     3420:     my $currentstring = &end_p();	# Close any unclosed <p>
1.325     albertel 3421:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3422: 	$currentstring .= $token->[4];     
1.122     albertel 3423:     } 
1.339     foxr     3424:     if ($target eq 'tex') {
                   3425: 	$currentstring .= '\begin{quote}';
                   3426:     }
1.122     albertel 3427:     return $currentstring;
                   3428: }
                   3429: 
                   3430: sub end_blockquote {
                   3431:     my ($target,$token) = @_;
                   3432:     my $currentstring = '';
1.325     albertel 3433:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3434: 	$currentstring = $token->[2];    
                   3435:     } 
1.339     foxr     3436:     if ($target eq 'tex') {
                   3437: 	$currentstring = '\end{quote}';
                   3438:     }
1.122     albertel 3439:     return $currentstring;
                   3440: }
                   3441: 
1.181     sakharuk 3442: #-- <button> tag (end tag required)
1.122     albertel 3443: sub start_button {
                   3444:     my ($target,$token) = @_;
                   3445:     my $currentstring = '';
1.325     albertel 3446:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3447: 	$currentstring = $token->[4];     
                   3448:     } 
                   3449:     return $currentstring;
                   3450: }
                   3451: 
                   3452: sub end_button {
                   3453:     my ($target,$token) = @_;
                   3454:     my $currentstring = '';
1.325     albertel 3455:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3456: 	$currentstring = $token->[2];    
                   3457:     } 
                   3458:     return $currentstring;
                   3459: }
                   3460: 
1.181     sakharuk 3461: #-- <caption> tag (end tag required)
1.122     albertel 3462: sub start_caption {
                   3463:     my ($target,$token) = @_;
                   3464:     my $currentstring = '';
1.325     albertel 3465:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3466: 	$currentstring = $token->[4];     
                   3467:     } 
                   3468:     return $currentstring;
                   3469: }
                   3470: 
                   3471: sub end_caption {
                   3472:     my ($target,$token) = @_;
                   3473:     my $currentstring = '';
1.325     albertel 3474:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3475: 	$currentstring = $token->[2];    
                   3476:     } 
                   3477:     return $currentstring;
                   3478: }
                   3479: 
1.181     sakharuk 3480: #-- <col> tag (end tag forbdden)
1.122     albertel 3481: sub start_col {
                   3482:     my ($target,$token) = @_;
                   3483:     my $currentstring = '';
1.325     albertel 3484:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3485: 	$currentstring = $token->[4];     
                   3486:     } 
                   3487:     return $currentstring;
                   3488: }
                   3489: 
                   3490: sub end_col {
                   3491:     my ($target,$token) = @_;
                   3492:     my $currentstring = '';
1.325     albertel 3493:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3494: 	$currentstring = $token->[2];    
                   3495:     } 
                   3496:     return $currentstring;
                   3497: }
                   3498: 
1.181     sakharuk 3499: #-- <colgroup> tag (end tag optional)
1.122     albertel 3500: sub start_colgroup {
                   3501:     my ($target,$token) = @_;
                   3502:     my $currentstring = '';
1.325     albertel 3503:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3504: 	$currentstring = $token->[4];     
                   3505:     } 
                   3506:     return $currentstring;
                   3507: }
                   3508: 
                   3509: sub end_colgroup {
                   3510:     my ($target,$token) = @_;
                   3511:     my $currentstring = '';
1.325     albertel 3512:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3513: 	$currentstring = $token->[2];    
                   3514:     } 
                   3515:     return $currentstring;
                   3516: }
                   3517: 
1.181     sakharuk 3518: #-- <del> tag (end tag required)
1.122     albertel 3519: sub start_del {
                   3520:     my ($target,$token) = @_;
                   3521:     my $currentstring = '';
1.325     albertel 3522:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3523: 	$currentstring = $token->[4];     
                   3524:     } 
                   3525:     return $currentstring;
                   3526: }
                   3527: 
                   3528: sub end_del {
                   3529:     my ($target,$token) = @_;
                   3530:     my $currentstring = '';
1.325     albertel 3531:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3532: 	$currentstring = $token->[2];    
                   3533:     } 
                   3534:     return $currentstring;
                   3535: }
                   3536: 
1.181     sakharuk 3537: #-- <fieldset> tag (end tag required)
1.122     albertel 3538: sub start_fieldset {
                   3539:     my ($target,$token) = @_;
                   3540:     my $currentstring = '';
1.325     albertel 3541:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3542: 	$currentstring = $token->[4];     
                   3543:     } 
                   3544:     return $currentstring;
                   3545: }
                   3546: 
                   3547: sub end_fieldset {
                   3548:     my ($target,$token) = @_;
                   3549:     my $currentstring = '';
1.325     albertel 3550:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3551: 	$currentstring = $token->[2];    
                   3552:     } 
                   3553:     return $currentstring;
                   3554: }
                   3555: 
1.181     sakharuk 3556: #-- <frame> tag (end tag forbidden)
1.122     albertel 3557: sub start_frame {
                   3558:     my ($target,$token) = @_;
                   3559:     my $currentstring = '';
1.325     albertel 3560:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3561: 	$currentstring = $token->[4];     
                   3562:     } 
                   3563:     return $currentstring;
                   3564: }
                   3565: 
                   3566: sub end_frame {
                   3567:     my ($target,$token) = @_;
                   3568:     my $currentstring = '';
1.325     albertel 3569:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3570: 	$currentstring = $token->[2];    
                   3571:     } 
                   3572:     return $currentstring;
                   3573: }
                   3574: 
1.181     sakharuk 3575: #-- <iframe> tag (end tag required)
1.122     albertel 3576: sub start_iframe {
                   3577:     my ($target,$token) = @_;
                   3578:     my $currentstring = '';
1.325     albertel 3579:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3580: 	$currentstring = $token->[4];     
                   3581:     } 
                   3582:     return $currentstring;
                   3583: }
                   3584: 
                   3585: sub end_iframe {
                   3586:     my ($target,$token) = @_;
                   3587:     my $currentstring = '';
1.325     albertel 3588:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3589: 	$currentstring = $token->[2];    
                   3590:     } 
                   3591:     return $currentstring;
                   3592: }
                   3593: 
1.181     sakharuk 3594: #-- <ins> tag (end tag required)
1.122     albertel 3595: sub start_ins {
                   3596:     my ($target,$token) = @_;
                   3597:     my $currentstring = '';
1.325     albertel 3598:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3599: 	$currentstring = $token->[4];     
                   3600:     } 
                   3601:     return $currentstring;
                   3602: }
                   3603: 
                   3604: sub end_ins {
                   3605:     my ($target,$token) = @_;
                   3606:     my $currentstring = '';
1.325     albertel 3607:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3608: 	$currentstring = $token->[2];    
                   3609:     } 
                   3610:     return $currentstring;
                   3611: }
                   3612: 
1.181     sakharuk 3613: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3614: sub start_isindex {
                   3615:     my ($target,$token) = @_;
                   3616:     my $currentstring = '';
1.325     albertel 3617:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3618: 	$currentstring = $token->[4];     
                   3619:     } 
                   3620:     return $currentstring;
                   3621: }
                   3622: 
                   3623: sub end_isindex {
                   3624:     my ($target,$token) = @_;
                   3625:     my $currentstring = '';
1.325     albertel 3626:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3627: 	$currentstring = $token->[2];    
                   3628:     } 
                   3629:     return $currentstring;
                   3630: }
                   3631: 
1.181     sakharuk 3632: #-- <keygen> tag (end tag forbidden)
1.122     albertel 3633: sub start_keygen {
                   3634:     my ($target,$token) = @_;
                   3635:     my $currentstring = '';
1.325     albertel 3636:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3637: 	$currentstring = $token->[4];     
                   3638:     } 
                   3639:     return $currentstring;
                   3640: }
                   3641: 
                   3642: sub end_keygen {
                   3643:     my ($target,$token) = @_;
                   3644:     my $currentstring = '';
1.325     albertel 3645:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3646: 	$currentstring = $token->[2];    
                   3647:     } 
                   3648:     return $currentstring;
                   3649: }
                   3650: 
                   3651: #-- <label> tag
                   3652: sub start_label {
                   3653:     my ($target,$token) = @_;
                   3654:     my $currentstring = '';
1.325     albertel 3655:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3656: 	$currentstring = $token->[4];     
                   3657:     } 
                   3658:     return $currentstring;
                   3659: }
                   3660: 
                   3661: sub end_label {
                   3662:     my ($target,$token) = @_;
                   3663:     my $currentstring = '';
1.325     albertel 3664:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3665: 	$currentstring = $token->[2];    
                   3666:     } 
                   3667:     return $currentstring;
                   3668: }
                   3669: 
1.181     sakharuk 3670: #-- <layer> tag (end tag required)
1.122     albertel 3671: sub start_layer {
                   3672:     my ($target,$token) = @_;
                   3673:     my $currentstring = '';
1.325     albertel 3674:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3675: 	$currentstring = $token->[4];     
                   3676:     } 
                   3677:     return $currentstring;
                   3678: }
                   3679: 
                   3680: sub end_layer {
                   3681:     my ($target,$token) = @_;
                   3682:     my $currentstring = '';
1.325     albertel 3683:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3684: 	$currentstring = $token->[2];    
                   3685:     } 
                   3686:     return $currentstring;
                   3687: }
                   3688: 
1.181     sakharuk 3689: #-- <legend> tag (end tag required)
1.122     albertel 3690: sub start_legend {
                   3691:     my ($target,$token) = @_;
                   3692:     my $currentstring = '';
1.325     albertel 3693:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3694: 	$currentstring = $token->[4];     
                   3695:     } 
                   3696:     return $currentstring;
                   3697: }
                   3698: 
                   3699: sub end_legend {
                   3700:     my ($target,$token) = @_;
                   3701:     my $currentstring = '';
1.325     albertel 3702:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3703: 	$currentstring = $token->[2];    
                   3704:     } 
                   3705:     return $currentstring;
                   3706: }
                   3707: 
1.181     sakharuk 3708: #-- <link> tag (end tag forbidden)
1.122     albertel 3709: sub start_link {
1.292     albertel 3710:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 3711:     my $currentstring = '';
1.324     albertel 3712:     if ($target eq 'web' || $target eq 'webgrade') {
1.291     albertel 3713: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   3714: 					    undef,1);
                   3715: 	&Apache::lonxml::extlink($href);
1.122     albertel 3716: 	$currentstring = $token->[4];     
                   3717:     } 
                   3718:     return $currentstring;
                   3719: }
                   3720: 
                   3721: sub end_link {
                   3722:     my ($target,$token) = @_;
                   3723:     my $currentstring = '';
1.325     albertel 3724:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3725: 	$currentstring = $token->[2];    
                   3726:     } 
                   3727:     return $currentstring;
                   3728: }
                   3729: 
1.181     sakharuk 3730: #-- <marquee> tag (end tag optional)
1.122     albertel 3731: sub start_marquee {
                   3732:     my ($target,$token) = @_;
                   3733:     my $currentstring = '';
1.325     albertel 3734:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3735: 	$currentstring = $token->[4];     
                   3736:     } 
                   3737:     return $currentstring;
                   3738: }
                   3739: 
                   3740: sub end_marquee {
                   3741:     my ($target,$token) = @_;
                   3742:     my $currentstring = '';
1.325     albertel 3743:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3744: 	$currentstring = $token->[2];    
                   3745:     } 
                   3746:     return $currentstring;
                   3747: }
                   3748: 
1.179     sakharuk 3749: #-- <multicol> tag (end tag required)
                   3750: sub start_multicol {
1.122     albertel 3751:     my ($target,$token) = @_;
1.279     foxr     3752:     my $currentstring = &end_p();	# Close any pending <p>
1.325     albertel 3753:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3754: 	$currentstring .= $token->[4];     
1.122     albertel 3755:     } 
                   3756:     return $currentstring;
                   3757: }
                   3758: 
1.179     sakharuk 3759: sub end_multicol {
1.122     albertel 3760:     my ($target,$token) = @_;
                   3761:     my $currentstring = '';
1.325     albertel 3762:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3763: 	$currentstring = $token->[2];    
                   3764:     } 
                   3765:     return $currentstring;
                   3766: }
                   3767: 
1.179     sakharuk 3768: #-- <nobr> tag (end tag required)
1.122     albertel 3769: sub start_nobr {
                   3770:     my ($target,$token) = @_;
                   3771:     my $currentstring = '';
1.325     albertel 3772:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3773: 	$currentstring = $token->[4];     
1.179     sakharuk 3774:     }  elsif ($target eq 'tex') {
                   3775: 	$currentstring='\mbox{';
                   3776:     }
1.122     albertel 3777:     return $currentstring;
                   3778: }
                   3779: 
                   3780: sub end_nobr {
                   3781:     my ($target,$token) = @_;
                   3782:     my $currentstring = '';
1.325     albertel 3783:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3784: 	$currentstring = $token->[2];    
1.179     sakharuk 3785:     }   elsif ($target eq 'tex') {
                   3786: 	$currentstring='}';
                   3787:     }
1.122     albertel 3788:     return $currentstring;
                   3789: }
                   3790: 
1.179     sakharuk 3791: #-- <noembed> tag (end tag required)
1.122     albertel 3792: sub start_noembed {
                   3793:     my ($target,$token) = @_;
                   3794:     my $currentstring = '';
1.325     albertel 3795:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3796: 	$currentstring = $token->[4];     
                   3797:     } 
                   3798:     return $currentstring;
                   3799: }
                   3800: 
                   3801: sub end_noembed {
                   3802:     my ($target,$token) = @_;
                   3803:     my $currentstring = '';
1.325     albertel 3804:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3805: 	$currentstring = $token->[2];    
                   3806:     } 
                   3807:     return $currentstring;
                   3808: }
                   3809: 
1.179     sakharuk 3810: #-- <noframes> tag (end tag required)
1.122     albertel 3811: sub start_noframes {
                   3812:     my ($target,$token) = @_;
                   3813:     my $currentstring = '';
1.325     albertel 3814:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3815: 	$currentstring = $token->[4];     
                   3816:     } 
                   3817:     return $currentstring;
                   3818: }
                   3819: 
                   3820: sub end_noframes {
                   3821:     my ($target,$token) = @_;
                   3822:     my $currentstring = '';
1.325     albertel 3823:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3824: 	$currentstring = $token->[2];    
                   3825:     } 
                   3826:     return $currentstring;
                   3827: }
                   3828: 
1.179     sakharuk 3829: #-- <nolayer> tag (end tag required)
1.122     albertel 3830: sub start_nolayer {
                   3831:     my ($target,$token) = @_;
                   3832:     my $currentstring = '';
1.325     albertel 3833:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3834: 	$currentstring = $token->[4];     
                   3835:     } 
                   3836:     return $currentstring;
                   3837: }
                   3838: 
                   3839: sub end_nolayer {
                   3840:     my ($target,$token) = @_;
                   3841:     my $currentstring = '';
1.325     albertel 3842:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3843: 	$currentstring = $token->[2];    
                   3844:     } 
                   3845:     return $currentstring;
                   3846: }
                   3847: 
1.179     sakharuk 3848: #-- <noscript> tag (end tag required)
1.122     albertel 3849: sub start_noscript {
                   3850:     my ($target,$token) = @_;
                   3851:     my $currentstring = '';
1.325     albertel 3852:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3853: 	$currentstring = $token->[4];     
                   3854:     } 
                   3855:     return $currentstring;
                   3856: }
                   3857: 
                   3858: sub end_noscript {
                   3859:     my ($target,$token) = @_;
                   3860:     my $currentstring = '';
1.325     albertel 3861:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3862: 	$currentstring = $token->[2];    
                   3863:     } 
                   3864:     return $currentstring;
                   3865: }
                   3866: 
1.179     sakharuk 3867: #-- <object> tag (end tag required)
1.122     albertel 3868: sub start_object {
                   3869:     my ($target,$token) = @_;
                   3870:     my $currentstring = '';
1.325     albertel 3871:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3872: 	$currentstring = $token->[4];     
                   3873:     } 
                   3874:     return $currentstring;
                   3875: }
                   3876: 
                   3877: sub end_object {
                   3878:     my ($target,$token) = @_;
                   3879:     my $currentstring = '';
1.325     albertel 3880:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3881: 	$currentstring = $token->[2];    
                   3882:     } 
                   3883:     return $currentstring;
                   3884: }
                   3885: 
1.179     sakharuk 3886: #-- <optgroup> tag (end tag required)
1.122     albertel 3887: sub start_optgroup {
                   3888:     my ($target,$token) = @_;
                   3889:     my $currentstring = '';
1.325     albertel 3890:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3891: 	$currentstring = $token->[4];     
                   3892:     } 
                   3893:     return $currentstring;
                   3894: }
                   3895: 
                   3896: sub end_optgroup {
                   3897:     my ($target,$token) = @_;
                   3898:     my $currentstring = '';
1.325     albertel 3899:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3900: 	$currentstring = $token->[2];    
                   3901:     } 
                   3902:     return $currentstring;
                   3903: }
                   3904: 
1.179     sakharuk 3905: #-- <samp> tag (end tag required)
1.122     albertel 3906: sub start_samp {
                   3907:     my ($target,$token) = @_;
                   3908:     my $currentstring = '';
1.325     albertel 3909:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3910: 	$currentstring = $token->[4];     
1.179     sakharuk 3911:     } elsif ($target eq 'tex') {
                   3912: 	$currentstring='\texttt{';
                   3913:     }
1.122     albertel 3914:     return $currentstring;
                   3915: }
                   3916: 
                   3917: sub end_samp {
                   3918:     my ($target,$token) = @_;
                   3919:     my $currentstring = '';
1.325     albertel 3920:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3921: 	$currentstring = $token->[2];    
1.179     sakharuk 3922:     } elsif ($target eq 'tex') {
                   3923: 	$currentstring='}';
                   3924:     }
1.122     albertel 3925:     return $currentstring;
                   3926: }
                   3927: 
                   3928: #-- <server> tag
                   3929: sub start_server {
                   3930:     my ($target,$token) = @_;
                   3931:     my $currentstring = '';
1.325     albertel 3932:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3933: 	$currentstring = $token->[4];     
                   3934:     } 
                   3935:     return $currentstring;
                   3936: }
                   3937: 
                   3938: sub end_server {
                   3939:     my ($target,$token) = @_;
                   3940:     my $currentstring = '';
1.325     albertel 3941:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3942: 	$currentstring = $token->[2];    
                   3943:     } 
                   3944:     return $currentstring;
                   3945: }
                   3946: 
1.179     sakharuk 3947: #-- <spacer> tag (end tag forbidden)
1.122     albertel 3948: sub start_spacer {
                   3949:     my ($target,$token) = @_;
1.279     foxr     3950:     my $currentstring = &end_p();	# Close off any open <p> tag.
1.325     albertel 3951:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3952: 	$currentstring .= $token->[4];     
1.122     albertel 3953:     } 
                   3954:     return $currentstring;
                   3955: }
                   3956: 
                   3957: sub end_spacer {
                   3958:     my ($target,$token) = @_;
                   3959:     my $currentstring = '';
1.325     albertel 3960:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3961: 	$currentstring = $token->[2];    
                   3962:     } 
                   3963:     return $currentstring;
                   3964: }
                   3965: 
1.179     sakharuk 3966: #-- <span> tag (end tag required)
1.122     albertel 3967: sub start_span {
                   3968:     my ($target,$token) = @_;
                   3969:     my $currentstring = '';
1.325     albertel 3970:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3971: 	$currentstring = $token->[4];     
                   3972:     } 
                   3973:     return $currentstring;
                   3974: }
                   3975: 
                   3976: sub end_span {
                   3977:     my ($target,$token) = @_;
                   3978:     my $currentstring = '';
1.325     albertel 3979:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3980: 	$currentstring = $token->[2];    
                   3981:     } 
                   3982:     return $currentstring;
                   3983: }
                   3984: 
1.179     sakharuk 3985: #-- <tbody> tag (end tag optional)
1.122     albertel 3986: sub start_tbody {
                   3987:     my ($target,$token) = @_;
                   3988:     my $currentstring = '';
1.325     albertel 3989:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3990: 	$currentstring = $token->[4];     
                   3991:     } 
                   3992:     return $currentstring;
                   3993: }
                   3994: 
                   3995: sub end_tbody {
                   3996:     my ($target,$token) = @_;
                   3997:     my $currentstring = '';
1.325     albertel 3998:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3999: 	$currentstring = $token->[2];    
                   4000:     } 
                   4001:     return $currentstring;
                   4002: }
                   4003: 
1.166     sakharuk 4004: #-- <tfoot> tag (end tag optional)
1.122     albertel 4005: sub start_tfoot {
                   4006:     my ($target,$token) = @_;
                   4007:     my $currentstring = '';
1.325     albertel 4008:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4009: 	$currentstring = $token->[4];     
                   4010:     } 
                   4011:     return $currentstring;
                   4012: }
                   4013: 
                   4014: sub end_tfoot {
                   4015:     my ($target,$token) = @_;
                   4016:     my $currentstring = '';
1.325     albertel 4017:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4018: 	$currentstring = $token->[2];    
                   4019:     } 
                   4020:     return $currentstring;
                   4021: }
                   4022: 
1.166     sakharuk 4023: #-- <thead> tag (end tag optional)
1.122     albertel 4024: sub start_thead {
                   4025:     my ($target,$token) = @_;
                   4026:     my $currentstring = '';
1.325     albertel 4027:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4028: 	$currentstring = $token->[4];     
                   4029:     } 
                   4030:     return $currentstring;
                   4031: }
1.10      www      4032: 
1.122     albertel 4033: sub end_thead {
                   4034:     my ($target,$token) = @_;
                   4035:     my $currentstring = '';
1.325     albertel 4036:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4037: 	$currentstring = $token->[2];    
                   4038:     } 
                   4039:     return $currentstring;
                   4040: }
1.119     www      4041: 
1.122     albertel 4042: #-- <var> tag
                   4043: sub start_var {
1.44      sakharuk 4044:     my ($target,$token) = @_;
                   4045:     my $currentstring = '';
1.325     albertel 4046:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4047: 	$currentstring = $token->[4];     
1.163     sakharuk 4048:     } elsif ($target eq 'tex') {
                   4049: 	$currentstring = '\textit{'; 
                   4050:     }
1.44      sakharuk 4051:     return $currentstring;
                   4052: }
1.10      www      4053: 
1.122     albertel 4054: sub end_var {
                   4055:     my ($target,$token) = @_;
1.44      sakharuk 4056:     my $currentstring = '';
1.325     albertel 4057:     if ($target eq 'web' || $target eq 'webgrade') {
1.163     sakharuk 4058: 	$currentstring = $token->[2];
                   4059:     } elsif ($target eq 'tex') {
                   4060: 	$currentstring = '}'; 
1.44      sakharuk 4061:     } 
                   4062:     return $currentstring;
                   4063: }
1.119     www      4064: 
1.163     sakharuk 4065: #-- <wbr> tag (end tag forbidden)
1.122     albertel 4066: sub start_wbr {
                   4067:     my ($target,$token) = @_;
                   4068:     my $currentstring = '';
1.325     albertel 4069:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4070: 	$currentstring = $token->[4];     
                   4071:     } 
                   4072:     return $currentstring;
1.98      albertel 4073: }
                   4074: 
1.122     albertel 4075: sub end_wbr {
                   4076:     my ($target,$token) = @_;
                   4077:     my $currentstring = '';
1.325     albertel 4078:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4079: 	$currentstring = $token->[2];    
                   4080:     } 
                   4081:     return $currentstring;
1.98      albertel 4082: }
1.134     sakharuk 4083: 
                   4084: #-- <hideweboutput> tag
                   4085: sub start_hideweboutput {
                   4086:     my ($target,$token) = @_;
1.325     albertel 4087:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4088: 	&Apache::lonxml::startredirection();     
                   4089:     } 
                   4090:     return '';
                   4091: }
                   4092: 
                   4093: sub end_hideweboutput {
                   4094:     my ($target,$token) = @_;
                   4095:     my $currentstring = '';
1.325     albertel 4096:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4097: 	$currentstring = &Apache::lonxml::endredirection();    
                   4098:     } 
                   4099:     return '';
                   4100: }
                   4101: 
1.94      sakharuk 4102: 
                   4103: sub image_replication {
                   4104:     my $src = shift;
1.187     albertel 4105:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   4106:     #replicates eps or ps 
                   4107:     my $epssrc = my $pssrc = $src;
                   4108:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   4109:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   4110:     if (not -e $epssrc && not -e $pssrc) {
                   4111: 	my $result=&Apache::lonnet::repcopy($epssrc);
1.264     raeburn  4112: 	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 4113:     }
                   4114:     return '';
1.195     sakharuk 4115: }
1.275     foxr     4116: #
                   4117: #   Get correct sizing parameter for an image given
                   4118: #   it's initial ht. and wid.  This allows sizing of
                   4119: #   images that are generated on-the-fly (e.g. gnuplot)
                   4120: #   as well as serving as a utility for image_size.
                   4121: # 
                   4122: #  Parameter:
                   4123: #        height_param
                   4124: #        width_param    - Initial picture dimensions.
                   4125: #        scaling        - A scale factor.
                   4126: #        parstack,      - the current stack of tag attributes 
                   4127: #                         from the xml parser
                   4128: #        safeeval,      - pointer to the safespace
                   4129: #        depth,         - from what level in the stack to look for attributes
                   4130: #                         (assumes -1 if unspecified)
                   4131: #        cis            - look for attrubutes case insensitively
                   4132: #                         (assumes false)
                   4133: #
                   4134: # Returns:
                   4135: #   height, width   - new dimensions.
                   4136: #
                   4137: sub resize_image {
                   4138:     my ($height_param, $width_param, $scaling,
                   4139: 	$parstack, $safeeval, $depth, $cis) = @_;
                   4140: 
                   4141:     # First apply the scaling...
1.271     foxr     4142: 
1.275     foxr     4143:     $height_param = $height_param * $scaling;
                   4144:     $width_param  = $width_param  * $scaling;
1.261     foxr     4145: 
1.197     sakharuk 4146:     #do we have any specified LaTeX size of the picture?
1.261     foxr     4147:     my $toget='TeXwidth'; 
                   4148:     if ($cis) { 
                   4149: 	$toget=lc($toget); 
                   4150:     }
1.256     albertel 4151:     my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
                   4152: 					      $safeeval,$depth,$cis);
                   4153:     $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
                   4154:     my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
                   4155: 					       $safeeval,$depth,$cis);
1.197     sakharuk 4156:     #do we have any specified web size of the picture?
                   4157:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
1.256     albertel 4158: 					   $depth,1);
                   4159:     if ($TeXwidth) { 
1.252     matthew  4160: 	my $old_width_param=$width_param;
1.197     sakharuk 4161: 	if ($TeXwidth=~/(\d+)\s*\%/) {
1.267     albertel 4162: 	    $width_param = $1*$env{'form.textwidth'}/100;
1.197     sakharuk 4163: 	} else { 
                   4164: 	    $width_param = $TeXwidth;
                   4165: 	}
1.266     albertel 4166: 	if ($TeXheight) {
                   4167: 	    $height_param = $TeXheight;
                   4168: 	} elsif ($old_width_param) {
                   4169: 	    $height_param=$TeXwidth/$old_width_param*$height_param;
                   4170: 	}
1.256     albertel 4171:     } elsif ($TeXheight) {
1.248     foxr     4172: 	$height_param = $TeXheight;
1.266     albertel 4173: 	if ($height_param) {
                   4174: 	    $width_param  = $TeXheight/$height_param*$width_param;
                   4175: 	}
1.256     albertel 4176:     } elsif ($width) {
1.252     matthew  4177: 	my $old_width_param=$width_param;
1.256     albertel 4178: 	$width_param = $width*$scaling;
1.266     albertel 4179: 	if ($old_width_param) {
                   4180: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4181: 	}
1.252     matthew  4182:     }
1.267     albertel 4183:     if ($width_param > $env{'form.textwidth'}) {
1.252     matthew  4184:         my $old_width_param=$width_param;
1.267     albertel 4185: 	$width_param =0.95*$env{'form.textwidth'};
1.266     albertel 4186: 	if ($old_width_param) {
                   4187: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4188: 	}
1.197     sakharuk 4189:     }
1.275     foxr     4190: 
                   4191:     return ($height_param, $width_param);
                   4192: }
                   4193: 
                   4194: sub image_size {
                   4195:     my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
                   4196: 
                   4197:     #size of image from gif/jpg/jpeg/png 
                   4198:     my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   4199:     if (-e $ressrc) {
                   4200: 	$src = $ressrc;
                   4201:     }
                   4202:     my $image = Image::Magick->new;
                   4203:     my $current_figure = $image->Read($src);
                   4204:     my $width_param = $image->Get('width');
                   4205:     my $height_param = $image->Get('height');
                   4206:     &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
                   4207:     undef($image);
                   4208: 
                   4209:     ($height_param, $width_param) = &resize_image($height_param, $width_param,
                   4210: 						  $scaling, $parstack, $safeeval, 
                   4211: 						  $depth, $cis);
                   4212: 
1.248     foxr     4213:     return ($height_param, $width_param);
                   4214: }
                   4215: 
                   4216: sub image_width {
                   4217:     my ($height, $width) = &image_size(@_);
                   4218:     return $width;
                   4219: }
                   4220: #  Not yet 100% sure this is correct in all circumstances..
                   4221: #  due to my uncertainty about mods to image_size.
                   4222: #
                   4223: sub image_height {
                   4224:     my ($height, $width) = &image_size(@_);
                   4225:     return $height;
1.197     sakharuk 4226: }
                   4227: 
1.256     albertel 4228: sub get_eps_image {
                   4229:     my ($src)=@_;
1.261     foxr     4230:     my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
1.285     foxr     4231: 
                   4232:     # In order to prevent the substitution of the alt text, we need to
                   4233:     # be sure the orig_src file is on system now so:
                   4234: 
                   4235:     if (! -e $orig_src) {
                   4236: 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
                   4237:     }
1.275     foxr     4238:     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
1.344     albertel 4239:     my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
1.256     albertel 4240:     $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
                   4241:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.275     foxr     4242:     &Apache::lonxml::debug("Filelocation gives: $src");
1.256     albertel 4243:     if (! -e $src) {
1.261     foxr     4244: 	&Apache::lonxml::debug("$src does not exist");
1.264     raeburn  4245: 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
1.261     foxr     4246: 	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
1.256     albertel 4247: 	    #if replication failed try to find ps file
                   4248: 	    $src=~s/\.eps$/\.ps/;
1.261     foxr     4249: 	    &Apache::lonxml::debug("Now looking for $src");
1.270     foxr     4250: 	    #if no ps file try to replicate it.
                   4251: 	    my $didrepcopy = &Apache::lonnet::repcopy($src);
                   4252: 	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
                   4253: 	    if ( (not -e $src) ||
                   4254: 		($didrepcopy ne 'ok')) {
1.261     foxr     4255: 		&Apache::lonxml::debug("Failed to find or replicate $src");
                   4256: 
1.256     albertel 4257: 		#if replication failed try to produce eps file dynamically
                   4258: 		$src=~s/\.ps$/\.eps/;
                   4259: 		my $temp_file;
1.267     albertel 4260: 		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.256     albertel 4261: 		my $newsrc=$orig_src;
                   4262: 		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
1.275     foxr     4263: 		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
1.344     albertel 4264: 		print FILE ("$newsrc\n");
                   4265: 		close(FILE);
1.256     albertel 4266: 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4267: 		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.283     albertel 4268: 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
                   4269: 		    $src =~ s/\.eps$/$sext.eps/;
                   4270: 		}
1.341     foxr     4271: 
1.256     albertel 4272: 	    }
1.343     foxr     4273: 
1.256     albertel 4274: 	}
1.341     foxr     4275:     } else {
                   4276: 	# If the postscript file has spaces in its name,
                   4277: 	# LaTeX will gratuitiously vomit.  Therefore
                   4278: 	# queue such files for copy with " " replaced by "_".
                   4279: 	# printout.pm will know them by their .ps  or .eps extensions.
                   4280: 	my $newsrc = $orig_src;
                   4281: 	$newsrc    =~  s|(.*)/res/|/home/httpd/html/res/|;
                   4282: 	open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.343     foxr     4283: 	print FILE "$src\n";
1.341     foxr     4284: 	close FILE;
                   4285: 	$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4286: 	$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.256     albertel 4287:     }
                   4288:     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
1.344     albertel 4289:     $path =~ s/ /\_/g;
1.343     foxr     4290:     $file =~ s/ /\_/g;
1.261     foxr     4291:     &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
1.256     albertel 4292:     return ($path.'/',$file);
                   4293: }
                   4294: 
1.195     sakharuk 4295: sub eps_generation {
                   4296:     my ($src,$file,$width_param) = @_;	     
1.267     albertel 4297:     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
1.195     sakharuk 4298:     my $temp_file = Apache::File->new('>>'.$filename); 
                   4299:     print $temp_file "$src\n";
                   4300:     my $newsrc = $src;
                   4301:     $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
1.345   ! albertel 4302:     $newsrc=~s{/home/httpd/html/res}{};
        !          4303:     $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
        !          4304:     $newsrc=~s{/\./}{/};
        !          4305:     $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
        !          4306:     if ($newsrc=~m{/home/httpd/lonUsers/}) {
        !          4307: 	$newsrc=~s{/home/httpd/lonUsers}{};
        !          4308: 	$newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
1.213     sakharuk 4309:     }
1.345   ! albertel 4310:     if ($newsrc=~m{/userfiles/}) {
1.239     sakharuk 4311: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4312:     } else {
                   4313: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4314:     }
1.197     sakharuk 4315: }
                   4316: 
                   4317: sub file_path {     
                   4318:     my $src=shift;
                   4319:     my ($file,$path); 
                   4320:     if ($src =~ m!(.*)/([^/]*)$!) {
                   4321: 	$file = $2; 
                   4322: 	$path = $1.'/'; 
                   4323:     } 
                   4324:     return $file,$path;
1.126     sakharuk 4325: }
1.294     foxr     4326: #  Converts a measurement in to mm from any of 
                   4327: #  the other valid LaTeX units of measure.
                   4328: #  If the units of measure are missing from the 
                   4329: #  parameter, it is assumed to be in and returned
                   4330: #  with mm units of measure
1.126     sakharuk 4331: sub recalc {
                   4332:     my $argument = shift;
                   4333:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 4334:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 4335:     my $value=$1;
                   4336:     my $units=$2;
                   4337:     if ($units eq 'cm') {
                   4338: 	$value*=10;
                   4339:     } elsif ($units eq 'in') {
                   4340: 	$value*=25.4;
                   4341:     } elsif ($units eq 'pc') {
                   4342: 	$value*=(25.4*12/72.27);
                   4343:     } elsif ($units eq 'pt') {
                   4344: 	$value*=(25.4/72.27);
                   4345:     }
                   4346:     return $value.' mm';
1.94      sakharuk 4347: }
1.184     sakharuk 4348: 
                   4349: sub LATEX_length {
                   4350:     my $garbage=shift;
1.206     sakharuk 4351:     $garbage=~s/^\s+$//;
                   4352:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   4353:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   4354:     $garbage=~s/(\s)+/$1/;#only one space
                   4355:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   4356:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   4357:     $garbage=~s/([^\\])\$/$1/g;#$
                   4358:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   4359:    $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 4360:     $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;
                   4361:     $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;
                   4362:     $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 4363:     $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;
                   4364:     $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;
                   4365:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   4366:     #remove some other LaTeX command
                   4367:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   4368:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   4369:     $garbage=~s|\+|11|g;
1.184     sakharuk 4370:     my  $value=length($garbage);
                   4371:     return $value;
                   4372: }
                   4373: 
                   4374: 
1.287     foxr     4375: # is_inside_of $tagstack $tag
                   4376: #    This sub returns true if the current state of Xml processing
                   4377: #    is inside of the tag.   
                   4378: # Parameters:
                   4379: #     tagstack   - The tagstack from the parser.
                   4380: #     tag        - The tag (without the <>'s.).
                   4381: # Sample usage:
                   4382: #     if (is_inside_of($tagstack "table")) {
                   4383: #          # I'm in a table....
                   4384: #      }
                   4385: sub is_inside_of {
                   4386:     my ($tagstack, $tag) = @_;
                   4387:     my @stack = @$tagstack;
                   4388:     for (my $i = ($#stack - 1); $i >= 0; $i--) {
                   4389: 	if ($stack[$i] eq $tag) {
                   4390: 	    return 1;
                   4391: 	}
                   4392:     }
                   4393:     return 0;
                   4394: }
1.184     sakharuk 4395: 
1.94      sakharuk 4396: 
1.1       sakharuk 4397: 1;
                   4398: __END__

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