Annotation of loncom/xml/londefdef.pm, revision 1.241

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.241   ! albertel    4: # $Id: londefdef.pm,v 1.240 2004/09/02 18:04:49 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: #
                     39: #
1.1       sakharuk   40: # last modified 06/26/00 by Alexander Sakharuk
1.28      www        41: # 11/6,11/30,02/01/01,5/4 Gerd Kortemeyer
1.41      sakharuk   42: # 01/18 Alex Sakharuk
1.1       sakharuk   43: 
1.2       albertel   44: package Apache::londefdef; 
1.1       sakharuk   45: 
1.118     www        46: use Apache::lonnet();
1.1       sakharuk   47: use strict;
1.124     sakharuk   48: use Apache::lonxml;
1.57      sakharuk   49: use Apache::File();
1.70      sakharuk   50: use Image::Magick;
1.118     www        51: use Apache::lonmenu();
                     52: use Apache::lonmeta();
1.187     albertel   53: use Apache::Constants qw(:common);
1.54      sakharuk   54: 
1.160     sakharuk   55: 
1.38      harris41   56: BEGIN {
1.15      sakharuk   57: 
1.135     sakharuk   58:     &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
1.15      sakharuk   59: 
1.188     albertel   60: }
                     61: 
                     62: sub initialize_londefdef {
                     63:     $Apache::londefdef::TD_redirection=0;
                     64:     @Apache::londefdef::table = ();
                     65:     $Apache::londefdef::select=0;
                     66:     @Apache::londefdef::description=();
                     67:     $Apache::londefdef::DD_redirection=0;
                     68:     $Apache::londefdef::DT_redirection=0;
1.238     albertel   69:     $Apache::londefdef::list_index=0;
1.3       sakharuk   70: }
1.1       sakharuk   71: 
1.35      sakharuk   72: #======================= TAG SUBROUTINES =====================
1.8       sakharuk   73: #-- <output>
1.21      albertel   74: sub start_output {
1.122     albertel   75:     my ($target) = @_;
                     76:     if ($target eq 'meta') { $Apache::lonxml::metamode--; }
                     77:     return '';
1.21      albertel   78: }
                     79: sub end_output {
1.122     albertel   80:     my ($target) = @_;
                     81:     if ($target eq 'meta') { $Apache::lonxml::metamode++; }
                     82:     return '';
1.21      albertel   83: }
1.4       sakharuk   84: #-- <m> tag
1.33      albertel   85: sub start_m {
1.190     albertel   86:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel   87:     my $currentstring = '';
1.193     albertel   88:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
1.191     albertel   89:     if ($target eq 'web' || $target eq 'analyze') {
1.122     albertel   90: 	$inside ='\\documentstyle{article}'.$inside;
                     91: 	&Apache::lonxml::debug("M is starting with:$inside:");
                     92: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                     93: 	if ($eval eq 'on') {
                     94: 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
                     95: 	    #&Apache::lonxml::debug("M is evaulated to:$inside:");
                     96: 	}
                     97: 	$currentstring = &Apache::lontexconvert::converted(\$inside);
                     98: 	if ($Apache::lontexconvert::errorstring) {
                     99: 	    &Apache::lonxml::warning("tth error: ".
                    100: 				     $Apache::lontexconvert::errorstring);
                    101: 	    $Apache::lontexconvert::errorstring='';
                    102: 	}
                    103: 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
1.178     albertel  104: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  105:     } elsif ($target eq 'tex') {
1.190     albertel  106: 	$currentstring = $inside;
1.178     albertel  107: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    108: 	if ($eval eq 'on') {
                    109: 	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
                    110: 	}
1.122     albertel  111: 	if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
1.178     albertel  112: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  113:     }
                    114:     return $currentstring;
1.33      albertel  115: }
1.122     albertel  116: 
1.33      albertel  117: sub end_m {
1.122     albertel  118:     my ($target,$token) = @_;
                    119:     my $currentstring = '';
1.204     albertel  120:     if ($target eq 'tex') {
1.122     albertel  121: 	$currentstring = "";
                    122:     }
                    123:     return $currentstring;
1.33      albertel  124: }
1.110     albertel  125: 
                    126: sub start_tthoption {
1.122     albertel  127:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    128:     my $result;
                    129:     if ($target eq 'web') {
                    130: 	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser);
                    131: 	$inside=~s/^\s*//;
                    132: 	if ($ENV{'browser.mathml'}) {
                    133: 	    &tth::ttmoptions($inside);
                    134: 	} else {
                    135: 	    &tth::tthoptions($inside);
                    136: 	}
                    137:     }
                    138:     return $result;
1.110     albertel  139: }
                    140: 
                    141: sub end_tthoption {
1.122     albertel  142:     my ($target,$token) = @_;
                    143:     my $result;
                    144:     return $result;
1.110     albertel  145: }
                    146: 
1.181     sakharuk  147: #-- <html> tag (end tag optional)
1.100     albertel  148: sub start_html {
                    149:     my ($target,$token) = @_;
                    150:     my $currentstring = '';
1.194     albertel  151:     my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'};
1.196     albertel  152:     &Apache::lontexconvert::init_tth();
1.186     albertel  153:     if ($target eq 'web' || $target eq 'edit') {
1.100     albertel  154: 	$currentstring = &Apache::lonxml::xmlbegin().
                    155: 	    &Apache::lonxml::fontsettings();     
                    156:     } elsif ($target eq 'tex') {
                    157: 	@Apache::londefdef::table = ();
1.232     sakharuk  158: 	$currentstring .= '\documentclass[letterpaper]{book}';
1.153     sakharuk  159: 	if ($ENV{'form.latex_type'}=~'batchmode') {$currentstring .='\batchmode';} 
1.217     sakharuk  160: 	$currentstring .= '\newcommand{\keephidden}[1]{}'.
                    161:                           '\renewcommand{\deg}{$^{\circ}$}'.
                    162:                           '\usepackage{longtable}'.
                    163:                           '\usepackage{textcomp}'.
                    164:                           '\usepackage{makeidx}'.
                    165:                           '\usepackage[dvips]{graphicx}'.
                    166:                           '\usepackage{epsfig}'.
                    167:                           '\usepackage{calc}'.
                    168:                           '\usepackage{amsmath}'.
                    169:                           '\usepackage{amssymb}'.
                    170:                           '\usepackage{amsfonts}'.
                    171:                           '\usepackage{amsthm}'.
                    172:                           '\usepackage{amscd}'.
                    173:                           '\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}}'.
                    174:                           '\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  175:     }
                    176:     return $currentstring;
                    177: }
1.122     albertel  178: 
                    179: sub end_html {
1.232     sakharuk  180:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  181:     my $currentstring = '';
                    182:     if ($target eq 'web') {
1.232     sakharuk  183: 	$currentstring = &Apache::lonxml::xmlend($target,$parser);
1.122     albertel  184:     }
                    185:     return $currentstring;
                    186: }
                    187: 
1.181     sakharuk  188: #-- <head> tag (end tag optional)
1.122     albertel  189: sub start_head {
                    190:     my ($target,$token) = @_;
                    191:     my $currentstring = '';
                    192:     if ($target eq 'web') {
                    193: 	$currentstring = $token->[4];     
                    194:     } 
                    195:     return $currentstring;
                    196: }
                    197: 
                    198: sub end_head {
                    199:     my ($target,$token) = @_;
                    200:     my $currentstring = '';
1.180     albertel  201:     if ($target eq 'web' && $ENV{'request.state'} eq 'published') {
1.122     albertel  202: 	$currentstring = &Apache::lonmenu::registerurl(undef,$target).
                    203: 	    $token->[2];    
                    204:     } 
                    205:     return $currentstring;
                    206: }
                    207: 
1.181     sakharuk  208: #-- <map> tag (end tag required)
1.122     albertel  209: sub start_map {
                    210:     my ($target,$token) = @_;
                    211:     my $currentstring = '';
                    212:     if ($target eq 'web') {
                    213: 	$currentstring = $token->[4];     
                    214:     } 
                    215:     return $currentstring;
                    216: }
                    217: 
                    218: sub end_map {
                    219:     my ($target,$token) = @_;
                    220:     my $currentstring = '';
                    221:     if ($target eq 'web') {
                    222: 	$currentstring = $token->[2];    
                    223:     } 
                    224:     return $currentstring;
                    225: }
                    226: 
1.181     sakharuk  227: #-- <select> tag (end tag required)
1.122     albertel  228: sub start_select {
                    229:     my ($target,$token) = @_;
                    230:     my $currentstring = '';
                    231:     if ($target eq 'web') {
                    232: 	$currentstring = $token->[4];     
1.181     sakharuk  233:     }  elsif ($target eq 'tex') {
                    234: 	$Apache::londefdef::select=0;
                    235:     }
1.122     albertel  236:     return $currentstring;
                    237: }
                    238: 
                    239: sub end_select {
                    240:     my ($target,$token) = @_;
                    241:     my $currentstring = '';
                    242:     if ($target eq 'web') {
                    243: 	$currentstring = $token->[2];    
                    244:     } 
                    245:     return $currentstring;
                    246: }
                    247: 
1.181     sakharuk  248: #-- <option> tag (end tag optional)
1.122     albertel  249: sub start_option {
1.181     sakharuk  250:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  251:     my $currentstring = '';
                    252:     if ($target eq 'web') {
                    253: 	$currentstring = $token->[4];     
1.181     sakharuk  254:     } elsif ($target eq 'tex') {
                    255: 	$Apache::londefdef::select++;
                    256: 	if ($Apache::londefdef::select == 1) {
                    257: 	    $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
                    258: 	} else {
                    259: 	    $currentstring='\keephidden{';
                    260: 	}
                    261:     }
1.122     albertel  262:     return $currentstring;
                    263: }
                    264: 
                    265: sub end_option {
                    266:     my ($target,$token) = @_;
                    267:     my $currentstring = '';
                    268:     if ($target eq 'web') {
                    269: 	$currentstring = $token->[2];    
1.181     sakharuk  270:     }  elsif ($target eq 'tex') {
                    271: 	$currentstring='}';
                    272:     }
1.122     albertel  273:     return $currentstring;
                    274: }
                    275: 
1.181     sakharuk  276: #-- <input> tag (end tag forbidden)
1.122     albertel  277: sub start_input {
                    278:     my ($target,$token) = @_;
                    279:     my $currentstring = '';
                    280:     if ($target eq 'web') {
                    281: 	$currentstring = $token->[4];     
                    282:     } 
                    283:     return $currentstring;
                    284: }
                    285: 
                    286: sub end_input {
                    287:     my ($target,$token) = @_;
                    288:     my $currentstring = '';
                    289:     if ($target eq 'web') {
                    290: 	$currentstring = $token->[2];    
                    291:     } 
                    292:     return $currentstring;
                    293: }
                    294: 
1.181     sakharuk  295: #-- <textarea> tag (end tag required)
1.122     albertel  296: sub start_textarea {
                    297:     my ($target,$token) = @_;
                    298:     my $currentstring = '';
                    299:     if ($target eq 'web') {
                    300: 	$currentstring = $token->[4];     
                    301:     } 
                    302:     return $currentstring;
                    303: }
                    304: 
                    305: sub end_textarea {
                    306:     my ($target,$token) = @_;
                    307:     my $currentstring = '';
                    308:     if ($target eq 'web') {
                    309: 	$currentstring = $token->[2];    
                    310:     } 
                    311:     return $currentstring;
                    312: }
                    313: 
1.181     sakharuk  314: #-- <form> tag (end tag required)
1.122     albertel  315: sub start_form {
                    316:     my ($target,$token) = @_;
                    317:     my $currentstring = '';
                    318:     if ($target eq 'web') {
                    319: 	$currentstring = $token->[4];     
                    320:     } 
                    321:     return $currentstring;
                    322: }
                    323: 
                    324: sub end_form {
                    325:     my ($target,$token) = @_;
                    326:     my $currentstring = '';
                    327:     if ($target eq 'web') {
                    328: 	$currentstring = $token->[2];    
                    329:     } 
                    330:     return $currentstring;
                    331: }
                    332: 
1.181     sakharuk  333: #-- <title> tag (end tag required)
1.122     albertel  334: sub start_title {
                    335:     my ($target,$token) = @_;
                    336:     my $currentstring = '';
                    337:     if ($target eq 'web') {
                    338: 	$currentstring = $token->[4];     
                    339:     } elsif ($target eq 'tex') {
1.166     sakharuk  340: 	$currentstring .= '\keephidden{Title of the document:  ' 
1.122     albertel  341:     }
                    342:     if ($target eq 'meta') {
                    343: 	$currentstring='<title>';
1.185     albertel  344: 	&start_output($target);
1.122     albertel  345:     }
                    346:     return $currentstring;
                    347: }
                    348: 
                    349: sub end_title {
                    350:     my ($target,$token) = @_;
                    351:     my $currentstring = '';
                    352:     if ($target eq 'web') {
                    353: 	$currentstring = $token->[2];    
                    354:     } elsif ($target eq 'tex') {
                    355: 	$currentstring .= '}';
                    356:     }  
                    357:     if ($target eq 'meta') {
1.185     albertel  358: 	&end_output($target);
1.122     albertel  359: 	$currentstring='</title>';
                    360:     } 
                    361:     return $currentstring;
                    362: }
                    363: 
1.181     sakharuk  364: #-- <meta> tag (end tag forbidden)
1.122     albertel  365: sub start_meta {
                    366:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    367:     my $currentstring = '';
                    368:     if ($target eq 'web') {
                    369: 	my $args='';
                    370: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    371: 	if ($args eq '') {
                    372: 	    &Apache::lonxml::get_all_text("/meta",$parser);
                    373: 	} else {
                    374: 	    $currentstring = $token->[4];
1.1       sakharuk  375: 	}
1.135     sakharuk  376:     } elsif ($target eq 'meta') {
1.122     albertel  377: 	unless (&Apache::lonxml::get_param
                    378: 		('http-equiv',$parstack,$safeeval,undef,1)) {
                    379: 	    my $name=$token->[2]->{'name'};
                    380: 	    $name=~tr/A-Z/a-z/;
                    381: 	    $name=~s/\s/\_/gs;
                    382: 	    $name=~s/\W//gs;
                    383: 	    if ($name) {
1.154     www       384: 		$currentstring='<'.$name;
                    385:                  my $display=&Apache::lonxml::get_param
                    386: 		('display',$parstack,$safeeval,undef,1);
                    387:                 if ($display) {
                    388:                     $display=~s/\"/\'/g;
                    389: 		    $currentstring.=' display="'.$display.'"';
                    390:                 }
                    391: 		$currentstring.='>'.
1.122     albertel  392: 		    &Apache::lonxml::get_param
                    393: 			('content',$parstack,$safeeval,undef,1).
1.135     sakharuk  394: 			'</'.$name.'>';
1.1       sakharuk  395: 	    }
1.154     www       396:             my $display=&Apache::lonxml::get_param
                    397: 		('display',$parstack,$safeeval,undef,1);
                    398:             if ($display) {
1.204     albertel  399: 		$display=&HTML::Entities::encode($display,'<>&"');
1.154     www       400: 		$currentstring.='<'.$name.'.display>'.$display.
                    401:                                '</'.$name.'.display>';
                    402:             }
1.1       sakharuk  403: 	}
1.135     sakharuk  404:     } elsif ($target eq 'tex') {
1.151     sakharuk  405: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    406: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
                    407: 	if ((not defined $content) && (not defined $name)) {
                    408: 	    &Apache::lonxml::startredirection();
                    409: 	}
1.122     albertel  410:     }
                    411:     return $currentstring;
                    412: }
                    413: 
                    414: sub end_meta {
1.165     albertel  415:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  416:     my $currentstring = '';
                    417:     if ($target eq 'web') {
                    418: 	my $args='';
                    419: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    420: 	if ($args ne '') {
1.121     www       421: 	    $currentstring = $token->[4];
1.122     albertel  422: 	}
1.135     sakharuk  423:     } elsif ($target eq 'tex') {
1.165     albertel  424: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    425: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
1.164     albertel  426: 	if ((not defined $content) && (not defined $name)) {
1.169     albertel  427: 	    &Apache::lonxml::endredirection();
1.164     albertel  428: 	}
1.135     sakharuk  429:     }
1.122     albertel  430:     return $currentstring;
                    431: }
                    432: 
1.121     www       433: # accessrule
1.122     albertel  434: sub start_accessrule {
                    435:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    436:     my $currentstring = '';
                    437:     my $eff=&Apache::lonxml::get_param
                    438: 	('effect',$parstack,$safeeval,undef,1);
                    439:     my $realm=&Apache::lonxml::get_param
                    440: 	('realm',$parstack,$safeeval,undef,1);
1.123     www       441:     my $role=&Apache::lonxml::get_param
                    442: 	('role',$parstack,$safeeval,undef,1);
                    443:     $realm=~s/\s+//g;
                    444:     $realm=~s/\//\_/g;
                    445:     $realm=~s/^\_//;
                    446:     $realm=~s/\W/\;/g;
                    447:     $role=~s/\s+//g;
                    448:     $role=~s/\//\_/g;
                    449:     $role=~s/\W/\;/g;
1.122     albertel  450:     if ($target eq 'web') {
                    451: 	my $args='';
                    452: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    453: 	if ($args eq '') {
                    454: 	    &Apache::lonxml::get_all_text("/accessrule",$parser);
                    455: 	} else {
                    456: 	    $currentstring = $token->[4];
                    457: 	}
                    458:     }
                    459:     if ($target eq 'meta') {
1.123     www       460: 	$currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
1.122     albertel  461:     }
                    462:     return $currentstring;
                    463: }
                    464: 
                    465: sub end_accessrule {
                    466:     my ($target,$token,$tagstack,$parstack,$parser) = @_;
                    467:     my $currentstring = '';
                    468:     if ($target eq 'web') {
                    469: 	my $args='';
                    470: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    471: 	if ($args ne '') {
                    472: 	    $currentstring = $token->[4];
                    473: 	}
                    474:     } 
                    475:     return $currentstring;
                    476: }
                    477: 
1.181     sakharuk  478: #-- <body> tag (end tag required)
1.122     albertel  479: sub start_body {
                    480:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    481:     my $currentstring = '';
                    482:     if ($target eq 'web') {
1.170     albertel  483: 	if ($Apache::lonhomework::parsing_a_problem) {
                    484: 	    &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
                    485: 	    return '';
                    486: 	}
1.180     albertel  487: 	if (!$Apache::lonxml::registered && 
                    488: 	    $ENV{'request.state'} eq 'published') {
1.122     albertel  489: 	    $currentstring.='<head>'.
                    490: 		&Apache::lonmenu::registerurl(undef,$target).'</head>';
                    491: 	}
1.155     www       492: # Accessibility
                    493: 	if ($ENV{'browser.imagesuppress'} eq 'on') {
                    494: 	    delete($token->[2]->{'background'});
                    495: 	}
                    496: 	if ($ENV{'browser.fontenhance'} eq 'on') {
                    497: 	    my $style='';
                    498: 	    foreach my $key (keys(%{$token->[2]})) {
                    499: 		if ($key =~ /^style$/i) {
                    500: 		    $style.=$token->[2]->{$key}.';';
                    501: 		    delete($token->[2]->{$key});
                    502: 		}
                    503: 	    }
                    504: 	    $token->[2]->{'style'}=$style.'; font-size: x-large;';
                    505: 	}
                    506: 	if ($ENV{'browser.blackwhite'} eq 'on') {
                    507: 	    delete($token->[2]->{'font'});
                    508: 	    delete($token->[2]->{'link'});
                    509: 	    delete($token->[2]->{'alink'});
                    510: 	    delete($token->[2]->{'vlink'});
                    511: 	    delete($token->[2]->{'bgcolor'});
                    512: 	    delete($token->[2]->{'background'});
                    513: 	}
                    514: # Overload loads
1.122     albertel  515: 	my $onLoad='';
                    516: 	foreach my $key (keys(%{$token->[2]})) {
                    517: 	    if ($key =~ /^onload$/i) {
                    518: 		$onLoad.=$token->[2]->{$key}.';';
                    519: 		delete($token->[2]->{$key});
1.121     www       520: 	    }
1.122     albertel  521: 	}
                    522: 	$token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
                    523: 	my $onUnload='';
                    524: 	foreach my $key (keys(%{$token->[2]})) {
                    525: 	    if ($key =~ /^onunload$/i) {
                    526: 		$onUnload.=$token->[2]->{$key}.';';
                    527: 		delete($token->[2]->{$key});
1.121     www       528: 	    }
                    529: 	}
1.122     albertel  530: 	$token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
                    531: 	    ';'.$onUnload;
                    532: 	
                    533: 	$currentstring .= '<'.$token->[1];
                    534: 	foreach (keys %{$token->[2]}) {
                    535: 	    $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
                    536: 	}
                    537: 	$currentstring.='>';
                    538: 	if ($ENV{'request.state'} ne 'published') {
                    539: 	    $currentstring.=(<<EDITBUTTON);
1.40      albertel  540: 		<form method="post">
1.200     matthew   541: 		<input type="submit" name="editmode" accesskey="e" value="Edit" />
1.40      albertel  542: 		</form>
                    543: EDITBUTTON
1.122     albertel  544: 	} else {
                    545: 	    $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
1.1       sakharuk  546: 	}
1.201     albertel  547: 	$currentstring.=&Apache::lonxml::message_location();
1.122     albertel  548:     } elsif ($target eq 'tex') {
                    549: 	$currentstring = '\begin{document}';  
                    550:     } 
                    551:     return $currentstring;
                    552: }
                    553: 
                    554: sub end_body {
                    555:     my ($target,$token) = @_;
                    556:     my $currentstring = '';
                    557:     if ($target eq 'web') {
                    558: 	$currentstring = $token->[2];     
                    559:     } elsif ($target eq 'tex') {
1.171     sakharuk  560: 	$currentstring = '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';  
1.122     albertel  561:     } 
                    562:     return $currentstring;
                    563: }
                    564: 
1.181     sakharuk  565: #-- <center> tag (end tag required)
1.122     albertel  566: sub start_center {
                    567:     my ($target,$token) = @_;
                    568:     my $currentstring = '';
                    569:     if ($target eq 'web') {
                    570: 	$currentstring = $token->[4];     
                    571:     } elsif ($target eq 'tex') {
                    572: 	$currentstring = '\begin{center}';  
1.144     sakharuk  573:     }
1.122     albertel  574:     return $currentstring;
                    575: }
                    576: 
                    577: sub end_center {
                    578:     my ($target,$token) = @_;
                    579:     my $currentstring = '';
                    580:     if ($target eq 'web') {
                    581: 	$currentstring = $token->[2];     
                    582:     } elsif ($target eq 'tex') {
                    583: 	$currentstring = '\end{center}';  
1.144     sakharuk  584:     }
1.122     albertel  585:     return $currentstring;
                    586: }
                    587: 
1.181     sakharuk  588: #-- <b> tag (end tag required)
1.122     albertel  589: sub start_b {
                    590:     my ($target,$token) = @_;
                    591:     my $currentstring = '';
                    592:     if ($target eq 'web') {
                    593: 	$currentstring = $token->[4];     
                    594:     } elsif ($target eq 'tex') {
                    595: 	$currentstring = '\textbf{';  
                    596:     } 
                    597:     return $currentstring;
                    598: }
                    599: 
                    600: sub end_b {
                    601:     my ($target,$token) = @_;
                    602:     my $currentstring = '';
                    603:     if ($target eq 'web') {
                    604: 	$currentstring = $token->[2];     
                    605:     } elsif ($target eq 'tex') {
                    606: 	$currentstring = '}';  
                    607:     } 
                    608:     return $currentstring;
                    609: }
1.35      sakharuk  610: 
1.181     sakharuk  611: #-- <strong> tag (end tag required)
1.122     albertel  612: sub start_strong {
                    613:     my ($target,$token) = @_;
                    614:     my $currentstring = '';
                    615:     if ($target eq 'web') {
                    616: 	$currentstring = $token->[4];     
                    617:     } elsif ($target eq 'tex') {
                    618: 	$currentstring = '\textbf{';  
                    619:     } 
                    620:     return $currentstring;
                    621: }
                    622: 
                    623: sub end_strong {
                    624:     my ($target,$token) = @_;
                    625:     my $currentstring = '';
1.182     sakharuk  626:     if ($target eq 'web') {	
1.122     albertel  627: 	$currentstring = $token->[2];     
                    628:     } elsif ($target eq 'tex') {
                    629: 	$currentstring = '}';  
1.144     sakharuk  630:     }
1.122     albertel  631:     return $currentstring;
                    632: }
                    633: 
1.181     sakharuk  634: #-- <h1> tag (end tag required)
1.122     albertel  635: sub start_h1 {
1.125     sakharuk  636:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  637:     my $currentstring = '';
                    638:     if ($target eq 'web') {
                    639: 	$currentstring .= $token->[4];
                    640:     } elsif ($target eq 'tex') {
1.125     sakharuk  641: 	my $pre;
1.199     albertel  642: 	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
1.212     sakharuk  643: 	if ($align eq 'center') {
1.125     sakharuk  644: 	    $pre='\begin{center}';
                    645: 	} elsif ($align eq 'left') {
                    646: 	    $pre='\rlap{';
                    647: 	} elsif ($align eq 'right') {
                    648: 	    $pre=' \hfill \llap{';
                    649: 	}
                    650: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    651: 	if (not defined $TeXsize) {$TeXsize="large";}
                    652: 	$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  653:     } elsif ($target eq 'meta') {
                    654: 	$currentstring='<subject>';
1.185     albertel  655: 	&start_output($target);
1.122     albertel  656:     }
                    657:     return $currentstring;
                    658: }
                    659: 
                    660: sub end_h1 {
1.125     sakharuk  661:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  662:     my $currentstring = '';
                    663:     if ($target eq 'web') {
                    664: 	$currentstring .= $token->[2];
                    665:     } elsif ($target eq 'tex') {
1.212     sakharuk  666: 	my $post='\vskip 0 mm ';
1.125     sakharuk  667: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  668: 	if ($align eq 'center') {
1.125     sakharuk  669: 	    $post='\end{center}';
                    670: 	} elsif ($align eq 'left') {
                    671: 	    $post='} \hfill'.'\vskip 0 mm ';
                    672: 	} elsif ($align eq 'right') {
                    673: 	    $post='}'.'\vskip 0 mm ';
                    674: 	}
                    675: 	$currentstring .= '}}'.$post;
1.122     albertel  676:     } elsif ($target eq 'meta') {
1.185     albertel  677: 	&end_output($target);
1.122     albertel  678: 	$currentstring='</subject>';
                    679:     } 
                    680:     return $currentstring;
                    681: }
                    682: 
1.35      sakharuk  683: #-- <h2> tag
1.122     albertel  684: sub start_h2 {
1.125     sakharuk  685:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  686:     my $currentstring = '';
                    687:     if ($target eq 'web') {
                    688: 	$currentstring .= $token->[4];
                    689:     } elsif ($target eq 'tex') {
1.125     sakharuk  690: 	my $pre;
                    691: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  692: 	if ($align eq 'center') {
1.125     sakharuk  693: 	    $pre='\begin{center}';
                    694: 	} elsif ($align eq 'left') {
                    695: 	    $pre='\rlap{';
                    696: 	} elsif ($align eq 'right') {
                    697: 	    $pre=' \hfill \llap{';
                    698: 	}
                    699: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    700: 	if (not defined $TeXsize) {$TeXsize="large";}
                    701: 	$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  702:     } 
                    703:     return $currentstring;
                    704: }
                    705: 
                    706: sub end_h2 {
1.125     sakharuk  707:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  708:     my $currentstring = '';
                    709:     if ($target eq 'web') {
                    710: 	$currentstring .= $token->[2];
                    711:     } elsif ($target eq 'tex') {
1.212     sakharuk  712: 	my $post='\vskip 0 mm ';
1.125     sakharuk  713: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  714: 	if ($align eq 'center') {
1.125     sakharuk  715: 	    $post='\end{center}';
                    716: 	} elsif ($align eq 'left') {
                    717: 	    $post='} \hfill'.'\vskip 0 mm ';
                    718: 	} elsif ($align eq 'right') {
                    719: 	    $post='}'.'\vskip 0 mm ';
                    720: 	}
                    721: 	$currentstring .= '}}'.$post;
1.122     albertel  722:     } 
                    723:     return $currentstring;
                    724: }
                    725: 
1.35      sakharuk  726: #-- <h3> tag
1.122     albertel  727: sub start_h3 {
1.125     sakharuk  728:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  729:     my $currentstring = '';
                    730:     if ($target eq 'web') {
                    731: 	$currentstring .= $token->[4];
                    732:     } elsif ($target eq 'tex') {
1.125     sakharuk  733: 	my $pre;
                    734: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  735: 	if ($align eq 'center') {
1.125     sakharuk  736: 	    $pre='\begin{center}';
                    737: 	} elsif ($align eq 'left') {
                    738: 	    $pre='\rlap{';
                    739: 	} elsif ($align eq 'right') {
                    740: 	    $pre=' \hfill \llap{';
                    741: 	}
                    742: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    743: 	if (not defined $TeXsize) {$TeXsize="large";}
                    744: 	$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  745:     } 
                    746:     return $currentstring;
                    747: }
                    748: 
                    749: sub end_h3 {
1.125     sakharuk  750:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  751:     my $currentstring = '';
                    752:     if ($target eq 'web') {
                    753: 	$currentstring .= $token->[2];
                    754:     } elsif ($target eq 'tex') {
1.212     sakharuk  755: 	my $post='\vskip 0 mm ';
1.125     sakharuk  756: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  757: 	if ($align eq 'center') {
1.125     sakharuk  758: 	    $post='\end{center}';
                    759: 	} elsif ($align eq 'left') {
                    760: 	    $post='} \hfill'.'\vskip 0 mm ';
                    761: 	} elsif ($align eq 'right') {
                    762: 	    $post='}'.'\vskip 0 mm ';
                    763: 	}
                    764: 	$currentstring .= '}}'.$post;
1.122     albertel  765:     } 
                    766:     return $currentstring;
                    767: }
                    768: 
1.35      sakharuk  769: #-- <h4> tag
1.122     albertel  770: sub start_h4 {
1.125     sakharuk  771:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  772:     my $currentstring = '';
                    773:     if ($target eq 'web') {
                    774: 	$currentstring .= $token->[4];
                    775:     } elsif ($target eq 'tex') {
1.125     sakharuk  776: 	my $pre;
                    777: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  778: 	if ($align eq 'center') {
1.125     sakharuk  779: 	    $pre='\begin{center}';
                    780: 	} elsif ($align eq 'left') {
                    781: 	    $pre='\rlap{';
                    782: 	} elsif ($align eq 'right') {
                    783: 	    $pre=' \hfill \llap{';
                    784: 	}
                    785: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    786: 	if (not defined $TeXsize) {$TeXsize="large";}
                    787: 	$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  788:     } 
                    789:     return $currentstring;
                    790: }
                    791: 
                    792: sub end_h4 {
1.125     sakharuk  793:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  794:     my $currentstring = '';
                    795:     if ($target eq 'web') {
                    796: 	$currentstring .= $token->[2];
                    797:     } elsif ($target eq 'tex') {
1.212     sakharuk  798: 	my $post='\vskip 0 mm ';
1.125     sakharuk  799: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  800: 	if ($align eq 'center') {
1.125     sakharuk  801: 	    $post='\end{center}';
                    802: 	} elsif ($align eq 'left') {
                    803: 	    $post='} \hfill'.'\vskip 0 mm ';
                    804: 	} elsif ($align eq 'right') {
                    805: 	    $post='}'.'\vskip 0 mm ';
                    806: 	}
                    807: 	$currentstring .= '}}'.$post;
1.122     albertel  808:     } 
                    809:     return $currentstring;
                    810: }
                    811: 
1.35      sakharuk  812: #-- <h5> tag
1.122     albertel  813: sub start_h5 {
1.125     sakharuk  814:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  815:     my $currentstring = '';
                    816:     if ($target eq 'web') {
                    817: 	$currentstring .= $token->[4];
                    818:     } elsif ($target eq 'tex') {
1.125     sakharuk  819: 	my $pre;
                    820: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  821: 	if ($align eq 'center') {
1.125     sakharuk  822: 	    $pre='\begin{center}';
                    823: 	} elsif ($align eq 'left') {
                    824: 	    $pre='\rlap{';
                    825: 	} elsif ($align eq 'right') {
                    826: 	    $pre=' \hfill \llap{';
                    827: 	}
                    828: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    829: 	if (not defined $TeXsize) {$TeXsize="large";}
                    830: 	$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  831:     } 
                    832:     return $currentstring;
                    833: }
                    834: 
                    835: sub end_h5 {
1.125     sakharuk  836:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  837:     my $currentstring = '';
                    838:     if ($target eq 'web') {
                    839: 	$currentstring .= $token->[2];
                    840:     } elsif ($target eq 'tex') {
1.212     sakharuk  841: 	my $post='\vskip 0 mm ';
1.125     sakharuk  842: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  843: 	if ($align eq 'center') {
1.125     sakharuk  844: 	    $post='\end{center}';
                    845: 	} elsif ($align eq 'left') {
                    846: 	    $post='} \hfill'.'\vskip 0 mm ';
                    847: 	} elsif ($align eq 'right') {
                    848: 	    $post='}'.'\vskip 0 mm ';
                    849: 	}
                    850: 	$currentstring .= '}}'.$post;
1.122     albertel  851:     } 
                    852:     return $currentstring;
                    853: }
                    854: 
1.35      sakharuk  855: #-- <h6> tag
1.122     albertel  856: sub start_h6 {
1.125     sakharuk  857:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  858:     my $currentstring = '';
                    859:     if ($target eq 'web') {
                    860: 	$currentstring .= $token->[4];
                    861:     } elsif ($target eq 'tex') {
1.125     sakharuk  862: 	my $pre;
                    863: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  864: 	if ($align eq 'center') {
1.125     sakharuk  865: 	    $pre='\begin{center}';
                    866: 	} elsif ($align eq 'left') {
                    867: 	    $pre='\rlap{';
                    868: 	} elsif ($align eq 'right') {
                    869: 	    $pre=' \hfill \llap{';
                    870: 	}
                    871: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    872: 	if (not defined $TeXsize) {$TeXsize="large";}
                    873: 	$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  874:     } 
                    875:     return $currentstring;
                    876: }
                    877: 
                    878: sub end_h6 {
1.125     sakharuk  879:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  880:     my $currentstring = '';
                    881:     if ($target eq 'web') {
                    882: 	$currentstring .= $token->[2];
                    883:     } elsif ($target eq 'tex') {
1.212     sakharuk  884: 	my $post='\vskip 0 mm ';
1.125     sakharuk  885: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  886: 	if ($align eq 'center') {
1.125     sakharuk  887: 	    $post='\end{center}';
                    888: 	} elsif ($align eq 'left') {
                    889: 	    $post='} \hfill'.'\vskip 0 mm ';
                    890: 	} elsif ($align eq 'right') {
                    891: 	    $post='}'.'\vskip 0 mm ';
                    892: 	}
                    893: 	$currentstring .= '}}'.$post;
1.122     albertel  894:     } 
                    895:     return $currentstring;
                    896: }
                    897: 
1.181     sakharuk  898: #--- <cite> tag (end tag required)
1.122     albertel  899: sub start_cite {
                    900:     my ($target,$token) = @_;
                    901:     my $currentstring = '';
                    902:     if ($target eq 'web') {
                    903: 	$currentstring .= $token->[4];
                    904:     } elsif ($target eq 'tex') {
1.179     sakharuk  905: 	$currentstring .= '\textit{';
1.144     sakharuk  906:     }
1.122     albertel  907:     return $currentstring;
                    908: }
                    909: 
                    910: sub end_cite {
                    911:     my ($target,$token) = @_;
                    912:     my $currentstring = '';
                    913:     if ($target eq 'web') {
                    914: 	$currentstring .= $token->[2];
                    915:     } elsif ($target eq 'tex') {
1.179     sakharuk  916: 	$currentstring .= '}';
1.144     sakharuk  917:     }
1.122     albertel  918:     return $currentstring;
                    919: }
                    920: 
1.181     sakharuk  921: #-- <i> tag (end tag required)
1.122     albertel  922: sub start_i {
                    923:     my ($target,$token) = @_;
                    924:     my $currentstring = '';
                    925:     if ($target eq 'web') {
                    926: 	$currentstring .= $token->[4];
                    927:     } elsif ($target eq 'tex') {
                    928: 	$currentstring .= '\textit{';
1.144     sakharuk  929:     }
1.122     albertel  930:     return $currentstring;
                    931: }
                    932: 
                    933: sub end_i {
                    934:     my ($target,$token) = @_;
                    935:     my $currentstring = '';
                    936:     if ($target eq 'web') {
                    937: 	$currentstring .= $token->[2];
                    938:     } elsif ($target eq 'tex') {
                    939: 	$currentstring .= '}';
                    940:     } 
                    941:     return $currentstring;
                    942: }
                    943: 
1.181     sakharuk  944: #-- <address> tag (end tag required)
1.122     albertel  945: sub start_address {
                    946:     my ($target,$token) = @_;
                    947:     my $currentstring = '';
                    948:     if ($target eq 'web') {
                    949: 	$currentstring .= $token->[4];
                    950:     } elsif ($target eq 'tex') {
1.179     sakharuk  951: 	$currentstring .= '\textit{';
1.144     sakharuk  952:     }
1.122     albertel  953:     return $currentstring;
                    954: }
                    955: 
                    956: sub end_address {
                    957:     my ($target,$token) = @_;
                    958:     my $currentstring = '';
                    959:     if ($target eq 'web') {
                    960: 	$currentstring .= $token->[2];
                    961:     } elsif ($target eq 'tex') {
1.179     sakharuk  962: 	$currentstring .= '}';
1.122     albertel  963:     }
                    964:     return $currentstring;
                    965: }
                    966: 
1.181     sakharuk  967: #-- <dfn> tag (end tag required)
1.122     albertel  968: sub start_dfn {
                    969:     my ($target,$token) = @_;
                    970:     my $currentstring = '';
                    971:     if ($target eq 'web') {
                    972: 	$currentstring .= $token->[4];
                    973:     } elsif ($target eq 'tex') {
1.179     sakharuk  974: 	$currentstring .= '\textit{';
1.122     albertel  975:     } 
                    976:     return $currentstring;
                    977: }
                    978: 
                    979: sub end_dfn {
                    980:     my ($target,$token) = @_;
                    981:     my $currentstring = '';
                    982:     if ($target eq 'web') {
                    983: 	$currentstring .= $token->[2];
                    984:     } elsif ($target eq 'tex') {
1.179     sakharuk  985: 	$currentstring .= '}';
1.144     sakharuk  986:     }
1.122     albertel  987:     return $currentstring;
                    988: }
                    989: 
1.181     sakharuk  990: #-- <tt> tag (end tag required)
1.122     albertel  991: sub start_tt {
                    992:     my ($target,$token) = @_;
                    993:     my $currentstring = '';
                    994:     if ($target eq 'web') {
                    995: 	$currentstring .= $token->[4];
                    996:     } elsif ($target eq 'tex') {
                    997: 	$currentstring .= '\texttt{';
1.144     sakharuk  998:     }
1.122     albertel  999:     return $currentstring;
                   1000: }
                   1001: 
                   1002: sub end_tt {
                   1003:     my ($target,$token) = @_;
                   1004:     my $currentstring = '';
                   1005:     if ($target eq 'web') {
                   1006: 	$currentstring .= $token->[2];
                   1007:     } elsif ($target eq 'tex') {
                   1008: 	$currentstring .= '}';
                   1009:     }
                   1010:     return $currentstring;
                   1011: }
                   1012: 
1.181     sakharuk 1013: #-- <kbd> tag (end tag required)
1.122     albertel 1014: sub start_kbd {
                   1015:     my ($target,$token) = @_;
                   1016:     my $currentstring = '';
                   1017:     if ($target eq 'web') {
                   1018: 	$currentstring .= $token->[4];
                   1019:     } elsif ($target eq 'tex') {
1.179     sakharuk 1020: 	$currentstring .= '\texttt{';
1.144     sakharuk 1021:     }
1.122     albertel 1022:     return $currentstring;
                   1023: }
                   1024: 
                   1025: sub end_kbd {
                   1026:     my ($target,$token) = @_;
                   1027:     my $currentstring = '';
                   1028:     if ($target eq 'web') {
                   1029: 	$currentstring .= $token->[2];
                   1030:     } elsif ($target eq 'tex') {
1.179     sakharuk 1031: 	$currentstring .= '}';
1.144     sakharuk 1032:     }
1.122     albertel 1033:     return $currentstring;
                   1034: }
                   1035: 
1.181     sakharuk 1036: #-- <code> tag (end tag required)
1.122     albertel 1037: sub start_code {
                   1038:     my ($target,$token) = @_;
                   1039:     my $currentstring = '';
                   1040:     if ($target eq 'web') {
                   1041: 	$currentstring .= $token->[4];
                   1042:     } elsif ($target eq 'tex') {
                   1043: 	$currentstring .= '\texttt{';
                   1044:     } 
                   1045:     return $currentstring;
                   1046: }
                   1047: 
                   1048: sub end_code {
                   1049:     my ($target,$token) = @_;
                   1050:     my $currentstring = '';
                   1051:     if ($target eq 'web') {
                   1052: 	$currentstring .= $token->[2];
                   1053:     } elsif ($target eq 'tex') {
                   1054: 	$currentstring .= '}';
                   1055:     } 
                   1056:     return $currentstring;
                   1057: }
                   1058: 
1.181     sakharuk 1059: #-- <em> tag (end tag required)
1.122     albertel 1060: sub start_em {
                   1061:     my ($target,$token) = @_;
                   1062:     my $currentstring = '';
                   1063:     if ($target eq 'web') {
                   1064: 	$currentstring .= $token->[4];
                   1065:     } elsif ($target eq 'tex') {
                   1066: 	$currentstring .= '\emph{';
1.144     sakharuk 1067:     }
1.122     albertel 1068:     return $currentstring;
                   1069: }
                   1070: 
                   1071: sub end_em {
                   1072:     my ($target,$token) = @_;
                   1073:     my $currentstring = '';
                   1074:     if ($target eq 'web') {
                   1075: 	$currentstring .= $token->[2];
                   1076:     } elsif ($target eq 'tex') {
                   1077: 	$currentstring .= '}';
1.144     sakharuk 1078:     } 
1.122     albertel 1079:     return $currentstring;
                   1080: }
                   1081: 
1.181     sakharuk 1082: #-- <q> tag (end tag required)
1.122     albertel 1083: sub start_q {
                   1084:     my ($target,$token) = @_;
                   1085:     my $currentstring = '';
                   1086:     if ($target eq 'web') {
                   1087: 	$currentstring .= $token->[4];
                   1088:     } elsif ($target eq 'tex') {
1.179     sakharuk 1089: 	$currentstring .= '\emph{';
1.122     albertel 1090:     }
                   1091:     return $currentstring;
                   1092: }
                   1093: 
                   1094: sub end_q {
                   1095:     my ($target,$token) = @_;
                   1096:     my $currentstring = '';
                   1097:     if ($target eq 'web') {
                   1098: 	$currentstring .= $token->[2];
                   1099:     } elsif ($target eq 'tex') {
1.179     sakharuk 1100: 	$currentstring .= '}';
1.144     sakharuk 1101:     } 
1.122     albertel 1102:     return $currentstring;
                   1103: }
                   1104: 
1.181     sakharuk 1105: #-- <p> tag (end tag optional)
1.198     sakharuk 1106: #optional attribute - align="center|left|right"
1.122     albertel 1107: sub start_p {
1.157     sakharuk 1108:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1109:     my $currentstring = '';
                   1110:     if ($target eq 'web') {
                   1111: 	$currentstring .= $token->[4];
                   1112:     } elsif ($target eq 'tex') {
1.198     sakharuk 1113: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1114: 	if ($align eq 'center') {
                   1115: 	    $currentstring='\begin{center}\par';
                   1116: 	} elsif ($align eq 'right') {
                   1117: 	    $currentstring='\makebox['.$ENV{'form.textwidth'}.']{\hfill\llap{';
                   1118: 	} elsif ($align eq 'left') {
                   1119: 	    $currentstring='\noindent\makebox['.$ENV{'form.textwidth'}.']{\rlap{';
1.216     matthew  1120: 	} else {
                   1121:             $currentstring='\par ';
                   1122:         }
1.198     sakharuk 1123: 	my $signal=1;#<p> does not work inside <b>...</b> 
                   1124: 	foreach my $tag (@$tagstack) {if (lc($tag) eq 'b') {$signal=0;}
                   1125: 	if (!$signal) {$currentstring = '';}
                   1126: 	}
1.144     sakharuk 1127:     }
1.122     albertel 1128:     return $currentstring;
                   1129: }
                   1130: 
                   1131: sub end_p {
1.198     sakharuk 1132:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1133:     my $currentstring = '';
                   1134:     if ($target eq 'web') {
                   1135: 	$currentstring .= $token->[2];
1.198     sakharuk 1136:     } elsif ($target eq 'tex') {
1.226     sakharuk 1137: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.233     sakharuk 1138: 	if (not defined $align) {
                   1139: 	    $currentstring.='\strut\\\\\strut ';
                   1140: 	} elsif ($align eq 'center') {		
1.226     sakharuk 1141: 	    $currentstring .= '\end{center}';
                   1142: 	} elsif ($align eq 'right') {
                   1143: 	    $currentstring .= '}}';
                   1144: 	} elsif ($align eq 'left') {
                   1145: 	    $currentstring .= '}\hfill}';
1.233     sakharuk 1146: 	} 
1.122     albertel 1147:     }
                   1148:     return $currentstring;
                   1149: }
                   1150: 
1.181     sakharuk 1151: #-- <br> tag (end tag forbidden)
1.122     albertel 1152: sub start_br {
                   1153:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1154:     my $currentstring = '';
                   1155:     if ($target eq 'web') {
                   1156: 	$currentstring .= $token->[4];
                   1157:     } elsif ($target eq 'tex') {
1.227     sakharuk 1158: 	my @tempo=@$tagstack;
1.229     sakharuk 1159: 	my $signal=0;
1.227     sakharuk 1160: 	for (my $i=$#tempo;$i>=0;$i--) {
                   1161: 	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1.230     sakharuk 1162:                 ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
                   1163:                 ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th'))  {
1.229     sakharuk 1164: 		$signal=1;
1.227     sakharuk 1165: 		last;
                   1166: 	    }
                   1167: 	}
1.229     sakharuk 1168: 	if ($signal) {
1.219     sakharuk 1169: 	    $currentstring .= ' \vskip 0 mm ';
                   1170: 	} elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
                   1171: 	    $currentstring .= '\strut \\\\ \strut ';
1.1       sakharuk 1172: 	}
1.144     sakharuk 1173:     }
1.122     albertel 1174:     return $currentstring;
                   1175: }
                   1176: 
                   1177: sub end_br {
                   1178:     my ($target,$token) = @_;
                   1179:     my $currentstring = '';
                   1180:     if ($target eq 'web') {
                   1181: 	$currentstring .= $token->[2];
                   1182:     }
                   1183:     return $currentstring;
                   1184: }
                   1185: 
1.181     sakharuk 1186: #-- <big> tag (end tag required)
1.122     albertel 1187: sub start_big {
                   1188:     my ($target,$token) = @_;
                   1189:     my $currentstring = '';
                   1190:     if ($target eq 'web') {
                   1191: 	$currentstring .= $token->[4];
                   1192:     } elsif ($target eq 'tex') {
1.137     sakharuk 1193: 	$currentstring .= '{\large ';
1.144     sakharuk 1194:     } 
1.122     albertel 1195:     return $currentstring;
                   1196: }
                   1197: 
                   1198: sub end_big {
                   1199:     my ($target,$token) = @_;
                   1200:     my $currentstring = '';
                   1201:     if ($target eq 'web') {
                   1202: 	$currentstring .= $token->[2];
                   1203:     } elsif ($target eq 'tex') {
                   1204: 	$currentstring .= '}';
                   1205:     }
                   1206:     return $currentstring;
                   1207: }
                   1208: 
1.181     sakharuk 1209: #-- <small> tag (end tag required)
1.122     albertel 1210: sub start_small {
                   1211:     my ($target,$token) = @_;
                   1212:     my $currentstring = '';
                   1213:     if ($target eq 'web') {
                   1214: 	$currentstring .= $token->[4];
                   1215:     } elsif ($target eq 'tex') {
                   1216: 	$currentstring .= '{\footnotesize ';
1.144     sakharuk 1217:     }
1.122     albertel 1218:     return $currentstring;
                   1219: }
                   1220: 
                   1221: sub end_small {
                   1222:     my ($target,$token) = @_;
                   1223:     my $currentstring = '';
                   1224:     if ($target eq 'web') {
                   1225: 	$currentstring .= $token->[2];
                   1226:     } elsif ($target eq 'tex') {
                   1227: 	$currentstring .= '}';
                   1228:     }
                   1229:     return $currentstring;
                   1230: }
                   1231: 
1.181     sakharuk 1232: #-- <basefont> tag (end tag forbidden)
1.122     albertel 1233: sub start_basefont {
1.126     sakharuk 1234:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.122     albertel 1235:     my $currentstring = '';
                   1236:     if ($target eq 'web') {
                   1237: 	$currentstring = $token->[4];     
1.126     sakharuk 1238:     } elsif ($target eq 'tex') {
                   1239: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1240: 	if (defined $basesize) {
                   1241: 	    $currentstring = '{\\'.$basesize.' ';
                   1242: 	}
                   1243:     }
1.122     albertel 1244:     return $currentstring;
                   1245: }
                   1246: 
                   1247: sub end_basefont {
1.126     sakharuk 1248:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1249:     my $currentstring = '';
                   1250:     if ($target eq 'web') {
                   1251: 	$currentstring = $token->[4];     
1.126     sakharuk 1252:     } elsif ($target eq 'tex') {
                   1253: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1254: 	if (defined $basesize) {
                   1255: 	    $currentstring = '}';
                   1256: 	}
                   1257:     }
1.122     albertel 1258:     return $currentstring;
                   1259: }
                   1260: 
1.181     sakharuk 1261: #-- <font> tag (end tag required)
1.122     albertel 1262: sub start_font {
                   1263:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1264:     my $currentstring = '';
                   1265:     if ($target eq 'web') {
                   1266: 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1.204     albertel 1267: 	if ($face!~/symbol/i) {
1.155     www      1268: 	    if (($ENV{'browser.fontenhance'} eq 'on') || 
                   1269: 		($ENV{'browser.blackwhite'} eq 'on')) { return ''; }
                   1270: 	}
1.122     albertel 1271: 	$currentstring = $token->[4];     
1.126     sakharuk 1272:     }  elsif ($target eq 'tex') {
                   1273: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1274: 	if (defined $fontsize) {
                   1275: 	    $currentstring = '{\\'.$fontsize.' ';
                   1276: 	}
                   1277:     }
1.122     albertel 1278:     return $currentstring;
                   1279: }
                   1280: 
                   1281: sub end_font {
                   1282:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1283:     my $currentstring = '';
                   1284:     if ($target eq 'web') {
                   1285: 	$currentstring = $token->[2];    
1.126     sakharuk 1286:     }  elsif ($target eq 'tex') {
                   1287: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1288: 	if (defined $fontsize) {
                   1289: 	    $currentstring = '}';
                   1290: 	}
                   1291:     }
1.122     albertel 1292:     return $currentstring;
                   1293: }
                   1294:  
1.181     sakharuk 1295: #-- <strike> tag (end tag required)
1.122     albertel 1296: sub start_strike {
                   1297:     my ($target,$token) = @_;
                   1298:     my $currentstring = '';
                   1299:     if ($target eq 'web') {
                   1300: 	$currentstring .= $token->[4];
                   1301:     } elsif ($target eq 'tex') {
                   1302: 	&Apache::lonxml::startredirection();
                   1303:     } 
                   1304:     return $currentstring;
                   1305: }
                   1306: 
                   1307: sub end_strike {
                   1308:     my ($target,$token) = @_;
                   1309:     my $currentstring = '';
                   1310:     if ($target eq 'web') {
                   1311: 	$currentstring .= $token->[2];
                   1312:     } elsif ($target eq 'tex') {
                   1313: 	$currentstring=&Apache::lonxml::endredirection();
                   1314: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 
                   1315: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/; 
                   1316: 	$currentstring=~s/(\S)\s*$/$1\}/;
                   1317:     }
                   1318:     return $currentstring;
                   1319: }
                   1320: 
1.181     sakharuk 1321: #-- <s> tag (end tag required)
1.122     albertel 1322: sub start_s {
                   1323:     my ($target,$token) = @_;
                   1324:     my $currentstring = '';
                   1325:     if ($target eq 'web') {
                   1326: 	$currentstring .= $token->[4];
                   1327:     } elsif ($target eq 'tex') {
                   1328: 	&Apache::lonxml::startredirection();
                   1329:     } 
                   1330:     return $currentstring;
                   1331: }
                   1332: 
                   1333: sub end_s {
                   1334:     my ($target,$token) = @_;
                   1335:     my $currentstring = '';
                   1336:     if ($target eq 'web') {
                   1337: 	$currentstring .= $token->[2];
                   1338:     } elsif ($target eq 'tex') {
                   1339: 	$currentstring=&Apache::lonxml::endredirection();
                   1340: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1341: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1342: 	$currentstring=~s/(\S)\s*$/$1\}/;	
                   1343:     }
                   1344:     return $currentstring;
                   1345: }
                   1346: 
1.181     sakharuk 1347: #-- <sub> tag (end tag required)
1.122     albertel 1348: sub start_sub {
                   1349:     my ($target,$token) = @_;
                   1350:     my $currentstring = '';
                   1351:     if ($target eq 'web') {
                   1352: 	$currentstring .= $token->[4];
                   1353:     } elsif ($target eq 'tex') {
1.202     sakharuk 1354: 	$currentstring .= '\ensuremath{_{';
1.122     albertel 1355:     } 
                   1356:     return $currentstring;
                   1357: }
                   1358: 
                   1359: sub end_sub {
                   1360:     my ($target,$token) = @_;
                   1361:     my $currentstring = '';
                   1362:     if ($target eq 'web') {
                   1363: 	$currentstring .= $token->[2];
                   1364:     } elsif ($target eq 'tex') {
1.202     sakharuk 1365: 	$currentstring .= '}}';
1.122     albertel 1366:     }
                   1367:     return $currentstring;
                   1368: }
                   1369: 
1.181     sakharuk 1370: #-- <sup> tag (end tag required)
1.122     albertel 1371: sub start_sup {
                   1372:     my ($target,$token) = @_;
                   1373:     my $currentstring = '';
                   1374:     if ($target eq 'web') {
                   1375: 	$currentstring .= $token->[4];
                   1376:     } elsif ($target eq 'tex') {
1.202     sakharuk 1377: 	$currentstring .= '\ensuremath{^{';
1.122     albertel 1378:     } 
                   1379:     return $currentstring;
                   1380: }
                   1381: 
                   1382: sub end_sup {
                   1383:     my ($target,$token) = @_;
                   1384:     my $currentstring = '';
                   1385:     if ($target eq 'web') {
                   1386: 	$currentstring .= $token->[2];
                   1387:     } elsif ($target eq 'tex') {
1.202     sakharuk 1388: 	$currentstring .= '}}';
1.122     albertel 1389:     }
                   1390:     return $currentstring;
                   1391: }
                   1392: 
1.181     sakharuk 1393: #-- <hr> tag (end tag forbidden)
1.122     albertel 1394: sub start_hr {
1.124     sakharuk 1395:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1396:     my $currentstring = '';
                   1397:     if ($target eq 'web') {
                   1398: 	$currentstring .= $token->[4];
                   1399:     } elsif ($target eq 'tex') {
1.149     sakharuk 1400: 	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.124     sakharuk 1401: 	if (defined $LaTeXwidth) {
                   1402: 	    if ($LaTeXwidth=~/^%/) {
                   1403: 		substr($LaTeXwidth,0,1)='';
                   1404: 		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
                   1405: 	    }
                   1406: 	} else {
1.148     sakharuk 1407: 	    $LaTeXwidth ='0.9\textwidth';
1.124     sakharuk 1408: 	}
                   1409: 	my ($pre,$post);
                   1410: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1411: 	if (($align eq 'center') || (not defined $align)) {
                   1412: 	    $pre=''; $post='';
                   1413: 	} elsif ($align eq 'left') {
                   1414: 	    $pre='\rlap{'; $post='} \hfill';
                   1415: 	} elsif ($align eq 'right') {
                   1416: 	    $pre=' \hfill \llap{'; $post='}';
                   1417: 	}
1.148     sakharuk 1418: 	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1.124     sakharuk 1419:                                     $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1.122     albertel 1420:     } 
                   1421:     return $currentstring;
                   1422: }
                   1423: 
                   1424: sub end_hr {
                   1425:     my ($target,$token) = @_;
                   1426:     my $currentstring = '';
                   1427:     if ($target eq 'web') {
                   1428: 	$currentstring .= $token->[2];
1.148     sakharuk 1429:     }
1.122     albertel 1430:     return $currentstring;
                   1431: }
                   1432: 
1.181     sakharuk 1433: #-- <div> tag (end tag required)
1.122     albertel 1434: sub start_div {
                   1435:     my ($target,$token) = @_;
                   1436:     my $currentstring = '';
                   1437:     if ($target eq 'web') {
                   1438: 	$currentstring .= $token->[4];
                   1439:     } 
                   1440:     return $currentstring;
                   1441: }
                   1442: 
                   1443: sub end_div {
                   1444:     my ($target,$token) = @_;
                   1445:     my $currentstring = '';
                   1446:     if ($target eq 'web') {
                   1447: 	$currentstring .= $token->[2];
                   1448:     } 
                   1449:     return $currentstring;
                   1450: }
                   1451: 
1.181     sakharuk 1452: #-- <a> tag (end tag required)
1.122     albertel 1453: sub start_a {
1.149     sakharuk 1454:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1455:     my $currentstring = '';
                   1456:     if ($target eq 'web') {
                   1457: 	$currentstring .= $token->[4];
                   1458:     } elsif ($target eq 'tex') {
1.149     sakharuk 1459: 	my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1.161     sakharuk 1460: 	my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
                   1461: 	if ($a=~/\S/) {
                   1462: 	    $a=~s/([^\\])%/$1\\\%/g;
                   1463: 	    $currentstring .= '\ref{URI: '.$a.'}';
                   1464: 	} elsif ($b=~/\S/) {
                   1465: 	    $currentstring .= '\ref{Anchor: '.$b.'}';
                   1466: 	} else {
                   1467: 	    $currentstring.='';
                   1468: 	}
1.122     albertel 1469:     }
                   1470:     return $currentstring;
                   1471: }
                   1472: 
                   1473: sub end_a {
1.168     albertel 1474:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1475:     my $currentstring = '';
                   1476:     if ($target eq 'web') {
                   1477: 	$currentstring .= $token->[2];
                   1478:     }
                   1479:     return $currentstring;
                   1480: }
                   1481: 
1.181     sakharuk 1482: #-- <li> tag (end tag optional)
1.122     albertel 1483: sub start_li {
1.168     albertel 1484:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1485:     my $currentstring = '';
                   1486:     if ($target eq 'web') {
                   1487: 	$currentstring = $token->[4];     
                   1488:     } elsif ($target eq 'tex') {
1.237     sakharuk 1489: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1490: 	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1.238     albertel 1491: 	#FIXME need to support types i and I 
                   1492: 	if ($type=~/disc/) {
                   1493: 	    $currentstring .= ' \item[$\bullet$] ';
                   1494: 	} elsif ($type=~/circle/) {
                   1495: 	    $currentstring .= ' \item[$\circ$] ';
1.146     sakharuk 1496: 	} elsif ($type=~/square/) {
1.238     albertel 1497: 	    $currentstring .= ' \item[$\diamond$] ';
                   1498: 	} elsif ($type eq '1') {
                   1499: 	    $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1.237     sakharuk 1500: 	} elsif ($type eq 'A') {
1.238     albertel 1501: 	    $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1502: 	} elsif ($type eq 'a') {
1.238     albertel 1503: 	    $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1504: 	} elsif ($value ne '') {
                   1505: 	    $currentstring .= ' \item['.$value.'] ';
1.122     albertel 1506: 	} else {
1.146     sakharuk 1507: 	    $currentstring .= ' \item ';
1.122     albertel 1508: 	}  
1.238     albertel 1509: 	$Apache::londefdef::list_index++;
                   1510:     }
1.122     albertel 1511:     return $currentstring;
                   1512: }
                   1513: 
                   1514: sub end_li {
                   1515:     my ($target,$token) = @_;
                   1516:     my $currentstring = '';
                   1517:     if ($target eq 'web') {
                   1518: 	$currentstring = $token->[2];     
                   1519:     } 
                   1520:     return $currentstring;
                   1521: }
                   1522: 
1.181     sakharuk 1523: #-- <u> tag (end tag required)
1.122     albertel 1524: sub start_u {
                   1525:     my ($target,$token) = @_;
                   1526:     my $currentstring = '';
                   1527:     if ($target eq 'web') {
                   1528: 	$currentstring .= $token->[4];
                   1529:     } elsif ($target eq 'tex') {
                   1530: 	&Apache::lonxml::startredirection();
                   1531:     } 
                   1532:     return $currentstring;
                   1533: }
                   1534: 
                   1535: sub end_u {
                   1536:     my ($target,$token) = @_;
                   1537:     my $currentstring = '';
                   1538:     if ($target eq 'web') {
                   1539: 	$currentstring .= $token->[2];
                   1540:     } elsif ($target eq 'tex') {
                   1541: 	$currentstring=&Apache::lonxml::endredirection();
                   1542: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1543: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1544: 	$currentstring=~s/(\S)\s*$/$1\}/;		
                   1545:     }
                   1546:     return $currentstring;
                   1547: }
                   1548: 
1.181     sakharuk 1549: #-- <ul> tag (end tag required)
1.122     albertel 1550: sub start_ul {
1.125     sakharuk 1551:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1552:     my $currentstring = '';
                   1553:     if ($target eq 'web') {
                   1554: 	$currentstring = $token->[4];     
                   1555:     } elsif ($target eq 'tex') {
1.125     sakharuk 1556: 	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1.238     albertel 1557: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1558: 	if ($TeXtype eq 'disc') {
1.222     sakharuk 1559: 	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                   1560:                               '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1561:                               '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1562:                               '\renewcommand{\labelitemiv}{$\bullet$}';
1.125     sakharuk 1563: 	} elsif ($TeXtype eq 'circle') {
1.222     sakharuk 1564: 	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                   1565:                               '\renewcommand{\labelitemii}{$\circ$}'. 
                   1566:                               '\renewcommand{\labelitemiii}{$\circ$}'.
                   1567:                               '\renewcommand{\labelitemiv}{$\circ$}';
1.125     sakharuk 1568: 	} elsif ($TeXtype eq 'square') {
1.222     sakharuk 1569: 	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                   1570:                               '\renewcommand{\labelitemii}{$\diamond$}'. 
                   1571:                               '\renewcommand{\labelitemiii}{$\diamond$}'.
                   1572:                               '\renewcommand{\labelitemiv}{$\diamond$}';
1.125     sakharuk 1573: 	}
1.222     sakharuk 1574: 	$currentstring .= '\strut \begin{itemize}';  
1.122     albertel 1575:     } 
                   1576:     return $currentstring;
                   1577: }
                   1578: 
                   1579: sub end_ul {
                   1580:     my ($target,$token) = @_;
                   1581:     my $currentstring = '';
                   1582:     if ($target eq 'web') {
                   1583: 	$currentstring = $token->[2];     
                   1584:     } elsif ($target eq 'tex') {
1.222     sakharuk 1585: 	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                   1586:                                '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1587:                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1588:                                '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
1.122     albertel 1589:     } 
                   1590:     return $currentstring;
                   1591: }
                   1592: 
1.181     sakharuk 1593: #-- <menu> tag (end tag required)
1.122     albertel 1594: sub start_menu {
                   1595:     my ($target,$token) = @_;
                   1596:     my $currentstring = '';
                   1597:     if ($target eq 'web') {
                   1598: 	$currentstring = $token->[4];     
                   1599:     } elsif ($target eq 'tex') {
                   1600: 	$currentstring = " \\begin{itemize} ";  
                   1601:     } 
                   1602:     return $currentstring;
                   1603: }
                   1604: 
                   1605: sub end_menu {
                   1606:     my ($target,$token) = @_;
                   1607:     my $currentstring = '';
                   1608:     if ($target eq 'web') {
                   1609: 	$currentstring = $token->[2];     
                   1610:     } elsif ($target eq 'tex') {
                   1611: 	$currentstring = " \\end{itemize}";  
                   1612:     } 
                   1613:     return $currentstring;
                   1614: }
                   1615: 
1.181     sakharuk 1616: #-- <dir> tag (end tag required)
1.122     albertel 1617: sub start_dir {
                   1618:     my ($target,$token) = @_;
                   1619:     my $currentstring = '';
                   1620:     if ($target eq 'web') {
                   1621: 	$currentstring = $token->[4];     
                   1622:     } elsif ($target eq 'tex') {
                   1623: 	$currentstring = " \\begin{itemize} ";  
                   1624:     } 
                   1625:     return $currentstring;
                   1626: }
                   1627: 
                   1628: sub end_dir {
                   1629:     my ($target,$token) = @_;
                   1630:     my $currentstring = '';
                   1631:     if ($target eq 'web') {
                   1632: 	$currentstring = $token->[2];     
                   1633:     } elsif ($target eq 'tex') {
                   1634: 	$currentstring = " \\end{itemize}";  
                   1635:     } 
                   1636:     return $currentstring;
                   1637: }
                   1638: 
1.181     sakharuk 1639: #-- <ol> tag (end tag required)
1.122     albertel 1640: sub start_ol {
1.125     sakharuk 1641:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1642:     my $currentstring = '';
                   1643:     if ($target eq 'web') {
                   1644: 	$currentstring = $token->[4];     
                   1645:     } elsif ($target eq 'tex') {
1.238     albertel 1646: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1647: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1648: 	if ($type eq '1') {
1.222     sakharuk 1649: 	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1650:                               '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                   1651:                               '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1652:                               '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1.125     sakharuk 1653: 	} elsif ($type eq 'A') {
1.222     sakharuk 1654: 	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                   1655:                               '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                   1656:                               '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                   1657:                               '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1.125     sakharuk 1658: 	} elsif ($type eq 'a') {
1.222     sakharuk 1659: 	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                   1660:                               '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                   1661:                               '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                   1662:                               '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1.125     sakharuk 1663: 	} elsif ($type eq 'i') {
1.222     sakharuk 1664: 	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                   1665:                               '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                   1666:                               '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                   1667:                               '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1.125     sakharuk 1668: 	} elsif ($type eq 'I') {
1.222     sakharuk 1669: 	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                   1670:                               '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                   1671:                               '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                   1672:                               '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1.125     sakharuk 1673: 	}
1.222     sakharuk 1674: 	$currentstring .= '\strut \begin{enumerate}';  
1.122     albertel 1675:     } 
                   1676:     return $currentstring;
                   1677: }
                   1678: 
                   1679: sub end_ol {
                   1680:     my ($target,$token) = @_;
                   1681:     my $currentstring = '';
                   1682:     if ($target eq 'web') {
                   1683: 	$currentstring = $token->[2];     
                   1684:     } elsif ($target eq 'tex') {
1.222     sakharuk 1685: 	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1686:                                         '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                   1687:                                         '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1688:                                         '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
1.122     albertel 1689:     } 
                   1690:     return $currentstring;
                   1691: }
                   1692: 
1.181     sakharuk 1693: #-- <dl> tag (end tag required)
1.122     albertel 1694: sub start_dl {
                   1695:     my ($target,$token) = @_;
                   1696:     my $currentstring = '';
                   1697:     if ($target eq 'web') {
                   1698: 	$currentstring = $token->[4];     
                   1699:     } elsif ($target eq 'tex') {
1.174     sakharuk 1700: 	$currentstring = '\begin{description}';
                   1701: 	@Apache::londefdef::description=();
                   1702: 	$Apache::londefdef::DD_redirection=0;
                   1703: 	$Apache::londefdef::DT_redirection=0;
1.122     albertel 1704:     } 
                   1705:     return $currentstring;
                   1706: }
                   1707: 
                   1708: sub end_dl {
1.174     sakharuk 1709:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1710:     my $currentstring = '';
                   1711:     if ($target eq 'web') {
                   1712: 	$currentstring = $token->[2];     
                   1713:     } elsif ($target eq 'tex') {
1.174     sakharuk 1714: 	if ($Apache::londefdef::DT_redirection) {
                   1715: 	    my $data=&item_cleanup;
                   1716: 	    push @Apache::londefdef::description,'\item['.$data.']';
                   1717: 	    $Apache::londefdef::DT_redirection=0;
                   1718: 	} elsif ($Apache::londefdef::DD_redirection) {
                   1719: 	    $Apache::londefdef::description[-1].=&Apache::lonxml::endredirection();
                   1720: 	}
                   1721: 	foreach my $element (@Apache::londefdef::description) {
                   1722: 	    $currentstring.=' '.$element.' ';
                   1723: 	}
                   1724: 	@Apache::londefdef::description=();
                   1725: 	$currentstring.='\end{description}';  
1.122     albertel 1726:     } 
                   1727:     return $currentstring;
                   1728: }
                   1729: 
1.172     sakharuk 1730: #-- <dt> tag (end tag optional)
1.122     albertel 1731: sub start_dt {
1.172     sakharuk 1732:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1733:     my $currentstring='';
1.122     albertel 1734:     if ($target eq 'web') {
                   1735: 	$currentstring = $token->[4];     
                   1736:     } elsif ($target eq 'tex') {
1.174     sakharuk 1737: 	if ($Apache::londefdef::DT_redirection) {
                   1738: 	    my $data=&item_cleanup;
                   1739: 	    push @Apache::londefdef::description,'\item['.$data.']';
                   1740: 	    $Apache::londefdef::DT_redirection=0;
                   1741: 	} elsif ($Apache::londefdef::DD_redirection) {
                   1742: 	    $Apache::londefdef::description[-1].=&Apache::lonxml::endredirection();
                   1743: 	    $Apache::londefdef::DD_redirection=0;
                   1744: 	}
                   1745: 	&Apache::lonxml::startredirection();
                   1746: 	$Apache::londefdef::DT_redirection=1;
1.122     albertel 1747:     } 
                   1748:     return $currentstring;
                   1749: }
                   1750: 
                   1751: sub end_dt {
1.172     sakharuk 1752:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1753:     my $currentstring = '';
                   1754:     if ($target eq 'web') {
                   1755: 	$currentstring = $token->[2];    
                   1756:     } elsif ($target eq 'tex') {
1.173     sakharuk 1757: 	my $data=&item_cleanup;
1.174     sakharuk 1758: 	push @Apache::londefdef::description,'\item['.$data.']';
                   1759: 	$Apache::londefdef::DT_redirection=0;
1.122     albertel 1760:     } 
                   1761:     return $currentstring;
                   1762: }
                   1763: 
1.173     sakharuk 1764: sub item_cleanup {
1.174     sakharuk 1765:     my $item=&Apache::lonxml::endredirection();
1.173     sakharuk 1766:     $item=~s/\\begin{center}//g;
                   1767:     $item=~s/\\end{center}//g;
                   1768:     return $item;
                   1769: }
                   1770: 
1.181     sakharuk 1771: #-- <dd> tag (end tag optional)
1.122     albertel 1772: sub start_dd {
1.147     sakharuk 1773:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1774:     my $currentstring = '';
                   1775:     if ($target eq 'web') {
                   1776: 	$currentstring = $token->[4];     
1.147     sakharuk 1777:     } elsif ($target eq 'tex') {
1.174     sakharuk 1778: 	if ($Apache::londefdef::DT_redirection) {
1.173     sakharuk 1779: 	    my $data=&item_cleanup;
1.174     sakharuk 1780: 	    push @Apache::londefdef::description,'\item['.$data.']';
                   1781: 	    $Apache::londefdef::DT_redirection=0;
1.147     sakharuk 1782: 	}
1.174     sakharuk 1783: 	$Apache::londefdef::DD_redirection=1;
                   1784: 	&Apache::lonxml::startredirection();
1.122     albertel 1785:     } 
                   1786:     return $currentstring;
                   1787: }
                   1788: 
                   1789: sub end_dd {
1.174     sakharuk 1790:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1791:     my $currentstring = '';
                   1792:     if ($target eq 'web') {
                   1793: 	$currentstring = $token->[2];    
1.174     sakharuk 1794:     }  elsif ($target eq 'tex') {
                   1795: 	$Apache::londefdef::description[-1].=&Apache::lonxml::endredirection();
                   1796: 	$Apache::londefdef::DD_redirection=0;
                   1797:     }
1.122     albertel 1798:     return $currentstring;
                   1799: }
                   1800: 
1.181     sakharuk 1801: #-- <table> tag (end tag required)
1.206     sakharuk 1802: #list of supported attributes: border,width,TeXwidth
1.91      sakharuk 1803: sub start_table {
                   1804:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.206     sakharuk 1805:     my ($textwidth,$currentstring)=('','');
1.91      sakharuk 1806:     if ($target eq 'web') {
                   1807: 	$currentstring = $token->[4];     
                   1808:     } elsif ($target eq 'tex') {
                   1809: 	my $aa = {};
                   1810: 	push @Apache::londefdef::table, $aa; 
                   1811: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 1812:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 1813: 	if ($#Apache::londefdef::table==0) {
                   1814: 	    $textwidth=&recalc($ENV{'form.textwidth'}); #result is always in mm
                   1815: 	    $textwidth=~/(\d+\.?\d*)/;
                   1816: 	    $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
                   1817: 	} else {
                   1818: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   1819: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   1820: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   1821: 	    } else {
                   1822:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 1823: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 1824: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   1825: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   1826: 		}
                   1827: 	    }
                   1828: 	}
1.126     sakharuk 1829: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   1830: 	if (not defined $TeXwidth) {
                   1831: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);
                   1832: 	    if ($htmlwidth=~/%/) {
1.203     sakharuk 1833:                 $Apache::londefdef::table[-1]{'percent'}=1;
1.126     sakharuk 1834: 		$htmlwidth=~/(\d+)/;
1.203     sakharuk 1835: 		$Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;;
1.126     sakharuk 1836: 	    } else {
                   1837: 		$Apache::londefdef::table[-1]{'width'}=$textwidth;
                   1838: 	    }
                   1839: 	} elsif ($TeXwidth=~/%/) {
1.203     sakharuk 1840: 	    $Apache::londefdef::table[-1]{'percent'}=1;
1.126     sakharuk 1841: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 1842:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 1843: 	} else {
1.222     sakharuk 1844: 	    $Apache::londefdef::table[-1]{'forcetablewidth'}=1;
1.206     sakharuk 1845: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.126     sakharuk 1846: 	}        
                   1847:         #table's border
1.206     sakharuk 1848: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 1849:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 1850: 	unless (defined $border) { $border = 0; }
                   1851: 	if ($border) { 
                   1852: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   1853: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   1854: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   1855: 	} else {
                   1856: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   1857: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   1858: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   1859: 	}
1.206     sakharuk 1860: 	if ($#Apache::londefdef::table==0) {
1.218     sakharuk 1861: 	    $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 1862: 	}
                   1863: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   1864:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   1865:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 1866:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 1867:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   1868:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   1869:         $Apache::londefdef::table[-1]{'content'}=[];
                   1870:         $Apache::londefdef::table[-1]{'align'}=[];
                   1871:         $currentstring='\keephidden{NEW TABLE ENTRY}';
                   1872:    }
1.91      sakharuk 1873:     return $currentstring;
                   1874: }
1.122     albertel 1875:  
                   1876: sub end_table {
                   1877:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1878:     my $currentstring = '';
                   1879:     if ($target eq 'web') {
                   1880: 	$currentstring = $token->[2];     
                   1881:     } elsif ($target eq 'tex') {
                   1882: 	my $inmemory = '';
                   1883: 	my $output = '';
1.206     sakharuk 1884: 	my $WARNING='';
                   1885:         #width of columns from TeXwidth attributes
                   1886: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   1887: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   1888: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   1889: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   1890: 		}	
                   1891: 	    }
                   1892: 	}
                   1893:         #free space and number of empty columns
                   1894: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 1895: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 1896: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   1897: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   1898: 		$empty_columns++;
                   1899: 	    } else {
                   1900: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   1901: 	    }
                   1902: 	}
                   1903:         #boundaries for contents columns
                   1904: 	my @min_len=();#columns can not be narrower 
                   1905: 	my @max_len=();#maximum length of column
                   1906: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   1907: 		my ($localmin,$localmax)=(0,0);
                   1908: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   1909: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   1910: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   1911: 		    }
                   1912: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   1913: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   1914: 		    }
                   1915: 		}
                   1916: 		push @min_len, $localmin;
                   1917: 		push @max_len, $localmax;
1.122     albertel 1918: 	}
1.206     sakharuk 1919: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   1920: 	    my $localmin=0,;
                   1921: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   1922: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   1923: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   1924: 		}
                   1925: 	    }
1.229     sakharuk 1926: 	    if ($max_len[$jn]<$localmin) {
                   1927: 		$max_len[$jn]=$localmin;
                   1928: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   1929: 	    }#object size is bigger
                   1930: 	    if ($min_len[$jn]<$localmin) {
                   1931: 		$min_len[$jn]=$localmin;
                   1932: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   1933: 	    }#object size is bigger
1.206     sakharuk 1934: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   1935: 		$min_len[$jn]=0;
                   1936: 		$max_len[$jn]=0;
                   1937: 	    }
                   1938: 	}
                   1939:        #final adjustment of column width
                   1940: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   1941: 	my @adjust=();
                   1942:         #step 1. adjustment by maximum value
                   1943: 	my $space_neeeded=0;
                   1944: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
                   1945: 	    $space_neeeded=$space_neeeded+$max_len[$jn];
                   1946: 	}
                   1947: 	if ($space_neeeded<=$available_space) {
                   1948: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   1949: 		if ($fwidth[$jn]==0) {
                   1950: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 1951: 		}
1.51      sakharuk 1952: 	    }
1.206     sakharuk 1953: 	} else {
                   1954:         #step 2. adjustment by minimum value (estimation)
                   1955: 	    $space_neeeded=0;
                   1956: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   1957: 		$space_neeeded+=$min_len[$jn];
                   1958: 	    }
                   1959: 	    if ($space_neeeded>$available_space) {
                   1960: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   1961: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   1962: 		    if ($fwidth[$jn]==0) {
                   1963: 			$fwidth[$jn]=$min_len[$jn];
                   1964: 		    }
                   1965: 		}
1.229     sakharuk 1966: 		#check if we have objects which can be scaled
                   1967: 		my $how_many_to_scale=0;
                   1968: 		my @to_scale=();
                   1969: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   1970: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   1971: 			$how_many_to_scale++;
                   1972: 			push @to_scale, $jn;
                   1973: 		    }
                   1974: 		}
                   1975: 		if ($how_many_to_scale>0) {
                   1976: 		    my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
                   1977: 		    foreach my $jn (@to_scale) {
                   1978: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   1979: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   1980: 			    if ($1 ne '') {
                   1981: 				my $current_length=&recalc($1);
                   1982: 				$current_length=~/(\d+\.?\d*)/;
                   1983: 				$current_length=$current_length-$space_to_adjust;
                   1984: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   1985: 			    }
                   1986: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   1987: 			    if ($1 ne '') {
                   1988: 				my $current_length=$1;
                   1989: 				$current_length=$current_length-$space_to_adjust;
                   1990: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   1991: 			    }				
                   1992: 			}
                   1993: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   1994: 		    }
                   1995: 		}
1.206     sakharuk 1996: 	    } else {
                   1997: 	      #step 3. adjustment over minimal + corrections
                   1998: 		my $enlarge_coef=$available_space/$space_neeeded;
                   1999: 		my $acsessive=0;
                   2000: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2001: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2002: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2003: 			$fwidth[$jn]=$max_len[$jn];
                   2004: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2005: 			$adjust[$jn]=0;
                   2006: 		    }
                   2007: 		}
                   2008: 		if ($acsessive>0) {
                   2009: 		#we have an excess of space and can redistribute it
                   2010: 		    my $notempty_columns=0;
                   2011: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2012: 			if ($adjust[$jn]!=0) {
                   2013: 			    $notempty_columns++;
                   2014: 			}
                   2015: 		    }
                   2016: 		    my $per_column=$acsessive/$notempty_columns;
                   2017: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2018: 			if ($adjust[$jn]!=0) {
                   2019: 			    $adjust[$jn]+=$per_column;
                   2020: 			    $fwidth[$jn]=$adjust[$jn];
                   2021: 			}
1.223     sakharuk 2022: 		    }
                   2023: 		} else {
                   2024: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2025: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2026: 		    }
                   2027: 		}
1.203     sakharuk 2028: 	    }
                   2029: 	}
1.222     sakharuk 2030:         #use all available width if it is defined in % or as TeXwidth
                   2031:         if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
1.203     sakharuk 2032: 	    my $current=0; 
1.206     sakharuk 2033: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2034: 		$current+=$fwidth[$i];
1.203     sakharuk 2035: 	    }
                   2036: 	    my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
1.206     sakharuk 2037: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2038: 		$fwidth[$i]*=$coef;
                   2039: 	    }
                   2040: 	}
                   2041:         #removing of empty columns if allowed
1.208     sakharuk 2042:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2043: 	if ($permission eq 'yes') {
                   2044: 	    my @cleaned_table=();
                   2045:             my @cleaned_header=();
                   2046: 	    my $colind=0;
                   2047: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2048: 		if ($fwidth[$jn]!=0) {
                   2049: 		    #we need to copy column
                   2050: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2051: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2052: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2053: 		    }
                   2054: 		    $colind++;
                   2055: 		}
1.122     albertel 2056: 	    }
1.206     sakharuk 2057: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2058: 	    @fwidth=@cleaned_header;
1.122     albertel 2059: 	}
1.206     sakharuk 2060: 	#construct header of the table
                   2061: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2062: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2063: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2064: 	}
                   2065: 	$header_of_table .= '}';
1.126     sakharuk 2066: 	#fill the table
                   2067: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.206     sakharuk 2068: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
                   2069: 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.228     sakharuk 2070: 		    $output.='\vspace*{-6 mm}\begin{center}';
1.206     sakharuk 2071: 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2072: 		    $output.=' \hfill \llap{'
                   2073: 		}
                   2074: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2075: 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.228     sakharuk 2076: 		    $output.='\end{center}\vspace*{-6 mm}';
1.206     sakharuk 2077: 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2078: 		    $output.='} ';
                   2079: 		}
                   2080:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2081: 	    }
                   2082: 	    $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
1.122     albertel 2083: 	}
1.218     sakharuk 2084: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
1.127     sakharuk 2085: 	if ($#Apache::londefdef::table > 0) {	    
                   2086: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
                   2087: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2088: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2089: 	} else {
                   2090: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2091: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2092: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2093: 	}
1.122     albertel 2094:     }
                   2095:     return $currentstring;
                   2096: }
                   2097: 
1.166     sakharuk 2098: #-- <tr> tag (end tag optional)
1.122     albertel 2099: sub start_tr {
                   2100:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2101:     my $currentstring = '';
                   2102:     if ($target eq 'web') {
                   2103: 	$currentstring = $token->[4];     
                   2104:     } elsif ($target eq 'tex') {
                   2105: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2106: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2107: 	if ($alignchar ne '') {
1.206     sakharuk 2108: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2109: 	} else {
                   2110: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2111: 	}
                   2112: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
                   2113: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2114: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2115: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2116: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2117: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2118: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.122     albertel 2119:     } 
                   2120:     return $currentstring;
                   2121: }
                   2122:         
                   2123: sub end_tr {
1.160     sakharuk 2124:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2125:     my $currentstring = '';
                   2126:     if ($target eq 'web') {
                   2127: 	$currentstring = $token->[2];     
                   2128:     } elsif ($target eq 'tex') {
1.160     sakharuk 2129: 	if ($Apache::londefdef::TD_redirection) {
                   2130: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2131: 	}
1.122     albertel 2132:     }
                   2133:     return $currentstring;
                   2134: }
                   2135: 
1.166     sakharuk 2136: #-- <td> tag (end tag optional)
1.122     albertel 2137: sub start_td {
                   2138:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2139:     my $currentstring = '';
                   2140:     if ($target eq 'web') {
                   2141: 	$currentstring = $token->[4];     
                   2142:     } elsif ($target eq 'tex') {
1.160     sakharuk 2143: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2144: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2145:     } 
                   2146:     return $currentstring;
                   2147: }   
1.159     sakharuk 2148:     
                   2149: sub tag_check {
                   2150:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2151:     my @ar=@$parstack; 
                   2152:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2153: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2154: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2155: 	    last;
                   2156: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2157: 	    splice @ar, $i+1;
                   2158: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2159: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2160: 	    last;
1.159     sakharuk 2161: 	}
1.160     sakharuk 2162:     }
1.159     sakharuk 2163:     return '';
                   2164: }
                   2165:  
                   2166: sub start_td_tex {
                   2167:     my ($parstack,$parser,$safeeval) = @_;
1.206     sakharuk 2168:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2169:     if ($alignchar eq '') {
                   2170: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2171:     }
1.206     sakharuk 2172:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2173:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2174:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2175:     if (defined $TeXwidth) {		
                   2176: 	my $current_length=&recalc($TeXwidth);
                   2177: 	$current_length=~/(\d+\.?\d*)/;
                   2178: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2179:     }
1.159     sakharuk 2180:     &Apache::lonxml::startredirection();
                   2181:     return '';
                   2182: }
                   2183: 
                   2184: sub end_td_tex {
                   2185:     my ($parstack,$parser,$safeeval) = @_;
                   2186:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   2187:     my $data=&Apache::lonxml::endredirection();
                   2188:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2189:     if (defined $TeXwidth) {		
1.206     sakharuk 2190: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2191: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2192: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.159     sakharuk 2193:     } else {
1.206     sakharuk 2194: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2195: 	    my $garbage_data=$data;
                   2196: 	    my $fwidth=0;
                   2197:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2198: 		my $current_length=&recalc($1);
                   2199: 		$current_length=~/(\d+\.?\d*)/;
                   2200: 		if ($fwidth<$1) {$fwidth=$1;}
                   2201: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2202: 	    }
                   2203:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2204: 		my $current_length=$1;
                   2205: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2206: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2207: 	    }
                   2208: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2209: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2210: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2211: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.231     sakharuk 2212: 	} elsif ($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)*/) {
                   2213: 	    my $garbage_data=$data;
                   2214: 	    my $fwidth=0;
                   2215:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2216: 		my $current_length=&recalc($1);
                   2217: 		$current_length=~/(\d+\.?\d*)/;
                   2218: 		if ($fwidth<$1) {$fwidth=$1;}
                   2219: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2220: 	    }
                   2221:             while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2222: 		my $current_length=&recalc($1);
                   2223: 		$current_length=~/(\d+\.?\d*)/;
                   2224: 		if ($fwidth<$1) {$fwidth=$1;}
                   2225: 		$garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2226: 	    }
                   2227: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2228: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2229: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2230: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2231: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2232: 	} else {  
1.166     sakharuk 2233: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2234: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2235: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2236: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2237: 	    if ($data=~/\\vskip/) {
                   2238:                 my $newdata=$data;
                   2239: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2240: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2241: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2242: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2243: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2244:                     my @words=split(/ /,$elementdata);
                   2245: 		    foreach my $word (@words) {
                   2246: 			my $lengthword=2.5*&LATEX_length($word);
                   2247: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2248: 		    }
1.166     sakharuk 2249: 		}
                   2250: 	    } else {
1.206     sakharuk 2251: 		$current_length=2.5*&LATEX_length($data);
                   2252:                     my @words=split(/ /,$data);
                   2253: 		    foreach my $word (@words) {
1.228     sakharuk 2254: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2255: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2256: 		    }
1.166     sakharuk 2257: 	    }
1.206     sakharuk 2258: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2259: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2260: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2261: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
1.159     sakharuk 2262: 	}        
                   2263:     }
                   2264: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   2265: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2266: 	}
1.206     sakharuk 2267:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.159     sakharuk 2268:     return'';
                   2269: }
                   2270: 
1.122     albertel 2271: sub end_td {
1.126     sakharuk 2272:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2273:     my $currentstring = '';
                   2274:     if ($target eq 'web') {
                   2275: 	$currentstring = $token->[2];     
                   2276:     } elsif ($target eq 'tex') {
1.160     sakharuk 2277:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2278: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2279:     }
                   2280:     return $currentstring;
                   2281: }
                   2282: 
1.166     sakharuk 2283: #-- <th> tag (end tag optional)
1.122     albertel 2284: sub start_th {
                   2285:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2286:     my $currentstring = '';
                   2287:     if ($target eq 'web') {
                   2288: 	$currentstring = $token->[4];     
                   2289:     } elsif ($target eq 'tex') {
1.230     sakharuk 2290: 	$Apache::londefdef::TD_redirection = 1;
                   2291: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2292:     } 
                   2293:     return $currentstring;
1.130     sakharuk 2294: }   
1.230     sakharuk 2295:     
                   2296: sub tagg_check {
                   2297:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2298:     my @ar=@$parstack; 
                   2299:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2300: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2301: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2302: 	    last;
                   2303: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2304: 	    splice @ar, $i+1;
                   2305: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   2306: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2307: 	    last;
                   2308: 	}
                   2309:     }
                   2310:     return '';
                   2311: }
                   2312:  
                   2313: sub start_th_tex {
                   2314:     my ($parstack,$parser,$safeeval) = @_;
                   2315:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2316:     if ($alignchar eq '') {
                   2317: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   2318:     }
                   2319:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   2320:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   2321:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2322:     if (defined $TeXwidth) {		
                   2323: 	my $current_length=&recalc($TeXwidth);
                   2324: 	$current_length=~/(\d+\.?\d*)/;
                   2325: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2326:     }
                   2327:     &Apache::lonxml::startredirection();
                   2328:     return '';
                   2329: }
                   2330: 
                   2331: sub end_th_tex {
                   2332:     my ($parstack,$parser,$safeeval) = @_;
                   2333:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   2334:     my $data=&Apache::lonxml::endredirection();
                   2335:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2336:     if (defined $TeXwidth) {		
                   2337: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2338: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2339: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2340:     } else {
                   2341: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2342: 	    my $garbage_data=$data;
                   2343: 	    my $fwidth=0;
                   2344:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2345: 		my $current_length=&recalc($1);
                   2346: 		$current_length=~/(\d+\.?\d*)/;
                   2347: 		if ($fwidth<$1) {$fwidth=$1;}
                   2348: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2349: 	    }
                   2350:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2351: 		my $current_length=$1;
                   2352: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2353: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2354: 	    }
                   2355: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2356: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2357: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2358: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2359: 	} else {  
                   2360: 	    $data=~s/^\s+(\S.*)/$1/; 
                   2361: 	    $data=~s/(.*\S)\s+$/$1/;
                   2362: 	    $data=~s/(\s)+/$1/;
                   2363: 	    my ($current_length,$min_length)=(0,0);
                   2364: 	    if ($data=~/\\vskip/) {
                   2365:                 my $newdata=$data;
                   2366: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2367: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2368: 		foreach my $elementdata (@newdata) {
                   2369: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   2370: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   2371:                     my @words=split(/ /,$elementdata);
                   2372: 		    foreach my $word (@words) {
                   2373: 			my $lengthword=2.5*&LATEX_length($word);
                   2374: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2375: 		    }
                   2376: 		}
                   2377: 	    } else {
                   2378: 		$current_length=2.5*&LATEX_length($data);
                   2379:                     my @words=split(/ /,$data);
                   2380: 		    foreach my $word (@words) {
                   2381: 			my $lengthword=2*&LATEX_length($word);
                   2382: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2383: 		    }
                   2384: 	    }
                   2385: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2386: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2387: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2388: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2389: 	}        
                   2390:     }
                   2391: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   2392: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2393: 	}
                   2394:     #make data bold
                   2395:     $data='\textbf{'.$data.'}';
                   2396:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
                   2397:     return'';
                   2398: }
                   2399: 
1.122     albertel 2400: sub end_th {
1.130     sakharuk 2401:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2402:     my $currentstring = '';
                   2403:     if ($target eq 'web') {
                   2404: 	$currentstring = $token->[2];     
                   2405:     } elsif ($target eq 'tex') {
1.230     sakharuk 2406:         $Apache::londefdef::TD_redirection =0;
                   2407: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 2408:     }
                   2409:     return $currentstring;
                   2410: }
1.230     sakharuk 2411:      
1.181     sakharuk 2412: #-- <img> tag (end tag forbidden)
1.122     albertel 2413: sub start_img {
                   2414:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2415:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   2416: 					 undef,1);
1.189     albertel 2417:     if (not $src and ($target eq 'web' or $target eq 'tex')) { 
                   2418: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser);
                   2419: 	return '';
                   2420:     }
1.122     albertel 2421:     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;
                   2422:     my $currentstring = '';
                   2423:     my $scaling = .3;
                   2424:     if ($target eq 'web') {
                   2425: 	if ($ENV{'browser.imagesuppress'} ne 'on') {
1.158     sakharuk 2426: 	    $currentstring.= $token->[4];
1.122     albertel 2427: 	} else {
                   2428: 	    my $alttag= &Apache::lonxml::get_param
                   2429: 		('alt',$parstack,$safeeval,undef,1);
                   2430: 	    unless ($alttag) {
                   2431: 		$alttag=&Apache::lonmeta::alttag
                   2432: 		    ($Apache::lonxml::pwd[-1],$src);
1.51      sakharuk 2433: 	    }
1.158     sakharuk 2434: 	    $currentstring.='[IMAGE: '.$alttag.']';
1.1       sakharuk 2435: 	}
1.122     albertel 2436:     } elsif ($target eq 'tex') {
1.239     sakharuk 2437: 	my $oldSRC=$src;
                   2438:         $oldSRC=~s/\.(gif|jpg|png)$/\.eps/;
1.122     albertel 2439: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   2440: 	#if original gif/jpg/png file exist do following:
1.192     sakharuk 2441: 	if (-e $src) {
1.197     sakharuk 2442: 	    #what is the image size?
                   2443: 	    my $width_param=&image_size($src,$scaling,$parstack,$safeeval);
                   2444:             my ($file,$path)=&file_path($src); 
1.122     albertel 2445: 	    my $newsrc = $src;
                   2446: 	    $newsrc =~ s/\.(gif|jpg|png)$/.eps/i;
1.240     albertel 2447: 	    &Apache::lonnet::repcopy($oldSRC);
1.122     albertel 2448: 	    $file=~s/\.(gif|jpg|png)$/.eps/i;
                   2449: 	    #where can we find the picture?
                   2450: 	    if (-e $newsrc) {
                   2451: 		#eps counterpart for image exist 
                   2452: 		if ($path) {
                   2453: 		    $currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
1.51      sakharuk 2454: 		}
1.122     albertel 2455: 	    } else {
                   2456: 		#there is no eps counterpart for image - check for ps one
                   2457: 		$newsrc =~ s/\.eps$/\.ps/;
                   2458: 		if (-e $newsrc) {
                   2459: 		    #ps counterpart for image exist 
                   2460: 		    $file =~ s/\.eps$/\.ps/;
                   2461: 		    if ($path) {
                   2462: 			$currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   2463: 		    }
1.78      sakharuk 2464: 		} else {
1.195     sakharuk 2465: 		    #care about eps dynamical generation
                   2466: 		    $currentstring.='\vskip 1 mm '.&eps_generation($src,$file,$width_param);
1.122     albertel 2467: 		}
                   2468: 	    }
                   2469: 	} else {
                   2470: 	    #original image file doesn't exist so check the alt attribute
                   2471: 	    my $alt = 
                   2472: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   2473: 	    unless ($alt) {
                   2474: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   2475: 	    }
                   2476: 
                   2477: 	    if ($alt) {
                   2478: 		$currentstring .= ' '.$alt.' ';
                   2479: 	    } else {
                   2480: 		#<allow> tag will care about replication 
1.59      sakharuk 2481: 	    }
                   2482: 	}
1.186     albertel 2483:     } elsif ($target eq 'edit') {
                   2484: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   2485: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
                   2486: 	    &Apache::edit::browse('src',undef,'alt').' '.
                   2487: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   2488: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   2489: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   2490: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   2491: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   2492: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 2493: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   2494: 						   ['','bottom','middle','top','left','right'],$token,5);
1.186     albertel 2495: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2496: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval);
                   2497: 	my $alt=&Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   2498: 	my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval);
                   2499: 	my $height=&Apache::lonxml::get_param('height',$parstack,$safeeval);
                   2500: 	$currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   2501: 	if ($width) { $currentstring.=' width="'.$width.'" '; }
                   2502: 	if ($height) { $currentstring.=' height="'.$height.'" '; }
                   2503: 	$currentstring .= ' />';
                   2504:     } elsif ($target eq 'modified') {
1.210     albertel 2505: 	my ($osrc,$owidth,$oheight)=
                   2506: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2507: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 2508: 					     $safeeval,'src','alt','align',
1.210     albertel 2509: 					     'TeXwidth','TeXheight',
                   2510: 					     'width','height');
                   2511: 	my ($nsrc,$nwidth,$nheight)=
                   2512: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2513: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   2514: 	&image_replication($loc);
                   2515: 	my ($iwidth,$iheight);
                   2516: 	if (-e $loc) {
                   2517: 	    my $image = Image::Magick->new;
                   2518: 	    $image->Read($loc);
                   2519: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   2520: 				   $image->Get('height'));
                   2521: 	}
                   2522: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   2523: 	    # changed image or no size specified,
                   2524:             # if they didn't explicitly change the 
                   2525:             # width or height use the ones from the image
                   2526: 	    if ($iwidth && $iheight) {
                   2527: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   2528: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   2529: 		}
                   2530: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   2531: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 2532: 		}
                   2533: 	    }
                   2534: 	}
1.210     albertel 2535: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   2536: 	# if we don't have a width or height
                   2537: 	if ($iwidth && $cwidth && !$cheight) {
                   2538: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   2539: 	}
                   2540: 	if ($iheight && $cheight && !$cwidth) {
                   2541: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   2542: 	}
                   2543: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 2544:     }
                   2545:     return $currentstring;
                   2546: }
                   2547: 
                   2548: sub end_img {
                   2549:     my ($target,$token) = @_;
                   2550:     my $currentstring = '';
                   2551:     if ($target eq 'web') {
                   2552: 	$currentstring = $token->[2];
                   2553:     } elsif ($target eq 'tex') {
                   2554: 	$currentstring = '';
                   2555:     }
                   2556:     return $currentstring;
                   2557: }
                   2558: 
1.181     sakharuk 2559: #-- <applet> tag (end tag required)
1.122     albertel 2560: sub start_applet {
                   2561:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2562:     
                   2563:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
                   2564:     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$code;
                   2565:     
                   2566:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   2567: 					   undef,1);
                   2568:     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$archive;
                   2569:     
                   2570:     my $currentstring = '';
                   2571:     if ($target eq 'web') {
                   2572: 	if ($ENV{'browser.appletsuppress'} ne 'on') {
                   2573: 	    $currentstring = $token->[4];
                   2574: 	} else {
                   2575: 	    my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   2576: 						   $safeeval,undef,1);
                   2577: 	    unless ($alttag) {
                   2578: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   2579: 						 $code);
1.44      sakharuk 2580: 	    }
1.122     albertel 2581: 	    $currentstring='[APPLET: '.$alttag.']';
1.1       sakharuk 2582: 	}
1.122     albertel 2583:     } elsif ($target eq 'tex') {
1.177     albertel 2584: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   2585: 					       $safeeval,undef,1);
                   2586: 	unless ($alttag) {
                   2587: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   2588: 						undef,1);
                   2589: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   2590: 					     $code);
1.175     sakharuk 2591: 	}
1.177     albertel 2592: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   2593: 	    '.}\end{center}';
1.122     albertel 2594:     } 
                   2595:     return $currentstring;
                   2596: }
                   2597: 
                   2598: sub end_applet {
                   2599:     my ($target,$token) = @_;
                   2600:     my $currentstring = '';
                   2601:     if ($target eq 'web') {
                   2602: 	$currentstring = $token->[2];
                   2603:     } elsif ($target eq 'tex') {
                   2604:     } 
                   2605:     return $currentstring;
                   2606: }
                   2607: 
1.181     sakharuk 2608: #-- <embed> tag (end tag optional/required)
1.122     albertel 2609: sub start_embed {    
                   2610:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2611:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   2612:     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;
                   2613:     my $currentstring = '';
                   2614:     if ($target eq 'web') {
                   2615: 	if ($ENV{'browser.embedsuppress'} ne 'on') {
                   2616: 	    $currentstring = $token->[4];
                   2617: 	} else {
                   2618: 	    my $alttag=&Apache::lonxml::get_param
                   2619: 		('alt',$parstack,$safeeval,undef,1);
                   2620: 	    unless ($alttag) {
                   2621: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
1.42      albertel 2622: 	    }
1.122     albertel 2623: 	    $currentstring='[EMBED: '.$alttag.']';
1.10      www      2624: 	}
1.122     albertel 2625:     } elsif ($target eq 'tex') {
                   2626:     } 
                   2627:     return $currentstring;
                   2628: }
                   2629: 
                   2630: sub end_embed {
                   2631:     my ($target,$token) = @_;
                   2632:     my $currentstring = '';
                   2633:     if ($target eq 'web') {
                   2634: 	$currentstring = $token->[2];     
1.175     sakharuk 2635:     } elsif ($target eq 'tex') {  
1.122     albertel 2636:     } 
                   2637:     return $currentstring;
                   2638: }
                   2639: 
1.181     sakharuk 2640: #-- <param> tag (end tag forbidden)
1.122     albertel 2641: sub start_param {
                   2642:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2643:     if (&Apache::lonxml::get_param
                   2644: 	('name',$parstack,$safeeval,undef,1)=~/^cabbase$/i) {
                   2645: 	$Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
                   2646: 	    &Apache::lonxml::get_param('value',$parstack,$safeeval,undef,1);
                   2647:     }   
                   2648:     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
                   2649: 	&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   2650:     my $currentstring = '';
                   2651:     if ($target eq 'web') {
                   2652: 	$currentstring = $token->[4];     
                   2653:     } elsif ($target eq 'tex') {
                   2654:     } 
                   2655:     return $currentstring;
                   2656: }
                   2657: 
                   2658: sub end_param {
                   2659:     my ($target,$token) = @_;
                   2660:     my $currentstring = '';
                   2661:     if ($target eq 'web') {
                   2662: 	$currentstring = $token->[2];     
                   2663:     } elsif ($target eq 'tex') {
                   2664:     } 
                   2665:     return $currentstring;
                   2666: }
                   2667: 
                   2668: #-- <allow> tag
                   2669: sub start_allow {
                   2670:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2671:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   2672:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.138     www      2673:     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
                   2674: 	&Apache::lonnet::clutter($src);
1.241   ! albertel 2675:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 2676:     my $result;
                   2677:     if ($target eq 'edit') {
                   2678: 	$result .=&Apache::edit::tag_start($target,$token);
                   2679: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   2680: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   2681:     } elsif ($target eq 'modified') {
                   2682: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2683: 						     $safeeval,'src');
                   2684: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2685:     }
                   2686:     return $result;
                   2687: }
                   2688: 
                   2689: sub end_allow {
                   2690:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2691:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   2692:     return '';
                   2693: }
1.119     www      2694: 
1.181     sakharuk 2695: #-- Frames (end tag required)
                   2696: #-- <frameset>
1.122     albertel 2697: sub start_frameset {
                   2698:     my ($target,$token) = @_;
                   2699:     my $currentstring = '';
                   2700:     if ($target eq 'web') { 
1.180     albertel 2701: 	if (!$Apache::lonxml::registered &&
                   2702: 	    $ENV{'request.state'} eq 'published') {
1.122     albertel 2703: 	    $currentstring.='<head>'.
                   2704: 		&Apache::lonmenu::registerurl(undef,$target).'</head>';
1.10      www      2705: 	}
1.133     www      2706: 	my $onLoad='';
                   2707: 	foreach my $key (keys(%{$token->[2]})) {
                   2708: 	    if ($key =~ /^onload$/i) {
                   2709: 		$onLoad.=$token->[2]->{$key}.';';
                   2710: 		delete($token->[2]->{$key});
                   2711: 	    }
                   2712: 	}
                   2713: 	$token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
                   2714: 	my $onUnload='';
                   2715: 	foreach my $key (keys(%{$token->[2]})) {
                   2716: 	    if ($key =~ /^onunload$/i) {
                   2717: 		$onUnload.=$token->[2]->{$key}.';';
                   2718: 		delete($token->[2]->{$key});
                   2719: 	    }
                   2720: 	}
                   2721: 	$token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
                   2722: 	    ';'.$onUnload;
                   2723: 	
                   2724: 	$currentstring .= '<'.$token->[1];
                   2725: 	foreach (keys %{$token->[2]}) {
                   2726: 	    $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
                   2727: 	}
                   2728: 	$currentstring.='>';
1.122     albertel 2729:     }
                   2730:     return $currentstring;
                   2731: }
                   2732: 
                   2733: sub end_frameset {
                   2734:     my ($target,$token) = @_;
                   2735:     my $currentstring = '';
                   2736:     if ($target eq 'web') {
                   2737: 	$currentstring = $token->[2];
                   2738:     }
                   2739:     return $currentstring;
                   2740: }
1.162     sakharuk 2741: 
1.181     sakharuk 2742: #-- <xmp> (end tag required)
1.162     sakharuk 2743: sub start_xmp {
                   2744:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2745:     my $currentstring = '';
                   2746:     if ($target eq 'web') {
                   2747: 	$currentstring .= $token->[4];
                   2748:     } elsif ($target eq 'tex') {
                   2749: 	$currentstring .= '\begin{verbatim}';
                   2750:     } 
                   2751:     return $currentstring;
                   2752: }
                   2753: 
                   2754: sub end_xmp {
                   2755:     my ($target,$token) = @_;
                   2756:     my $currentstring = '';
                   2757:     if ($target eq 'web') {
                   2758: 	$currentstring .= $token->[2];
                   2759:     } elsif ($target eq 'tex') {
                   2760: 	$currentstring .= '\end{verbatim}';
                   2761:     }
                   2762:     return $currentstring;
                   2763: }
                   2764: 
1.181     sakharuk 2765: #-- <pre> (end tag required)
1.122     albertel 2766: sub start_pre {
1.126     sakharuk 2767:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2768:     my $currentstring = '';
                   2769:     if ($target eq 'web') {
                   2770: 	$currentstring .= $token->[4];
                   2771:     } elsif ($target eq 'tex') {
1.136     sakharuk 2772: 	$currentstring .= '\begin{verbatim}';
1.122     albertel 2773:     } 
                   2774:     return $currentstring;
                   2775: }
                   2776: 
                   2777: sub end_pre {
                   2778:     my ($target,$token) = @_;
                   2779:     my $currentstring = '';
                   2780:     if ($target eq 'web') {
                   2781: 	$currentstring .= $token->[2];
                   2782:     } elsif ($target eq 'tex') {
1.136     sakharuk 2783: 	$currentstring .= '\end{verbatim}';
1.122     albertel 2784:     }
                   2785:     return $currentstring;
                   2786: }
                   2787: 
                   2788: #-- <insert>
                   2789: sub start_insert {
                   2790:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2791:     my $currentstring = '';
                   2792:     if ($target eq 'web') {
                   2793: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   2794: 	$currentstring .= '<b>'.$display.'</b>';;
                   2795:     }
                   2796:     return $currentstring;
                   2797: }
                   2798: 
                   2799: sub end_insert {
                   2800:     my ($target,$token) = @_;
                   2801:     my $currentstring = '';
                   2802:     if ($target eq 'web') {
                   2803: 	$currentstring .= '';
                   2804:     }
                   2805:     return $currentstring;
                   2806: }
                   2807: 
                   2808: #-- <externallink>
                   2809: sub start_externallink {
                   2810:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2811:     my $currentstring = '';
                   2812:     if ($target eq 'web') {
                   2813: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   2814: 	$currentstring .= '<b>'.$display.'</b>';;
                   2815:     }
                   2816:     return $currentstring;
                   2817: }
                   2818: 
                   2819: sub end_externallink {
                   2820:     my ($target,$token) = @_;
                   2821:     my $currentstring = '';
                   2822:     if ($target eq 'web') {
                   2823: 	$currentstring .= '';
                   2824:     }
                   2825:     return $currentstring;
                   2826: }
                   2827: 
                   2828: #-- <blankspace heigth="">
                   2829: sub start_blankspace {
                   2830:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2831:     my $currentstring = '';
                   2832:     if ($target eq 'tex') {
                   2833: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   2834: 	$currentstring .= '\vskip '.$howmuch.' ';
                   2835:     }
                   2836:     return $currentstring;
                   2837: }
                   2838: 
                   2839: sub end_blankspace {
                   2840:     my ($target,$token) = @_;
                   2841:     my $currentstring = '';
                   2842:     if ($target eq 'tex') {
                   2843: 	$currentstring .= '';
                   2844:     }
                   2845:     return $currentstring;
                   2846: }
                   2847: 
1.181     sakharuk 2848: #-- <abbr> tag (end tag required)
1.122     albertel 2849: sub start_abbr {
                   2850:     my ($target,$token) = @_;
                   2851:     my $currentstring = '';
                   2852:     if ($target eq 'web') {
                   2853: 	$currentstring = $token->[4];     
                   2854:     } 
                   2855:     return $currentstring;
                   2856: }
                   2857: 
                   2858: sub end_abbr {
                   2859:     my ($target,$token) = @_;
                   2860:     my $currentstring = '';
                   2861:     if ($target eq 'web') {
                   2862: 	$currentstring = $token->[2];    
                   2863:     } 
                   2864:     return $currentstring;
                   2865: }
                   2866: 
1.181     sakharuk 2867: #-- <acronym> tag (end tag required)
1.122     albertel 2868: sub start_acronym {
                   2869:     my ($target,$token) = @_;
                   2870:     my $currentstring = '';
                   2871:     if ($target eq 'web') {
                   2872: 	$currentstring = $token->[4];     
                   2873:     } 
                   2874:     return $currentstring;
                   2875: }
                   2876: 
                   2877: sub end_acronym {
                   2878:     my ($target,$token) = @_;
                   2879:     my $currentstring = '';
                   2880:     if ($target eq 'web') {
                   2881: 	$currentstring = $token->[2];    
                   2882:     } 
                   2883:     return $currentstring;
                   2884: }
                   2885: 
1.181     sakharuk 2886: #-- <area> tag (end tag forbidden)
1.122     albertel 2887: sub start_area {
                   2888:     my ($target,$token) = @_;
                   2889:     my $currentstring = '';
                   2890:     if ($target eq 'web') {
                   2891: 	$currentstring = $token->[4];     
                   2892:     } 
                   2893:     return $currentstring;
                   2894: }
                   2895: 
                   2896: sub end_area {
                   2897:     my ($target,$token) = @_;
                   2898:     my $currentstring = '';
                   2899:     if ($target eq 'web') {
                   2900: 	$currentstring = $token->[2];    
                   2901:     } 
                   2902:     return $currentstring;
                   2903: }
                   2904: 
1.181     sakharuk 2905: #-- <base> tag (end tag forbidden)
1.122     albertel 2906: sub start_base {
                   2907:     my ($target,$token) = @_;
                   2908:     my $currentstring = '';
                   2909:     if ($target eq 'web') {
                   2910: 	$currentstring = $token->[4];     
1.161     sakharuk 2911:     }
1.122     albertel 2912:     return $currentstring;
                   2913: }
                   2914: 
                   2915: sub end_base {
                   2916:     my ($target,$token) = @_;
                   2917:     my $currentstring = '';
                   2918:     if ($target eq 'web') {
                   2919: 	$currentstring = $token->[2];    
                   2920:     } 
                   2921:     return $currentstring;
                   2922: }
                   2923: 
1.181     sakharuk 2924: #-- <bdo> tag (end tag required)
1.122     albertel 2925: sub start_bdo {
                   2926:     my ($target,$token) = @_;
                   2927:     my $currentstring = '';
                   2928:     if ($target eq 'web') {
                   2929: 	$currentstring = $token->[4];     
                   2930:     } 
                   2931:     return $currentstring;
                   2932: }
                   2933: 
                   2934: sub end_bdo {
                   2935:     my ($target,$token) = @_;
                   2936:     my $currentstring = '';
                   2937:     if ($target eq 'web') {
                   2938: 	$currentstring = $token->[2];    
                   2939:     } 
                   2940:     return $currentstring;
                   2941: }
                   2942: 
1.181     sakharuk 2943: #-- <bgsound> tag (end tag optional)
1.122     albertel 2944: sub start_bgsound {
                   2945:     my ($target,$token) = @_;
                   2946:     my $currentstring = '';
                   2947:     if ($target eq 'web') {
                   2948: 	$currentstring = $token->[4];     
                   2949:     } 
                   2950:     return $currentstring;
                   2951: }
                   2952: 
                   2953: sub end_bgsound {
                   2954:     my ($target,$token) = @_;
                   2955:     my $currentstring = '';
                   2956:     if ($target eq 'web') {
                   2957: 	$currentstring = $token->[2];    
                   2958:     } 
                   2959:     return $currentstring;
                   2960: }
                   2961: 
1.181     sakharuk 2962: #-- <blink> tag (end tag required)
1.122     albertel 2963: sub start_blink {
                   2964:     my ($target,$token) = @_;
                   2965:     my $currentstring = '';
                   2966:     if ($target eq 'web') {
                   2967: 	$currentstring = $token->[4];     
                   2968:     } 
                   2969:     return $currentstring;
                   2970: }
                   2971: 
                   2972: sub end_blink {
                   2973:     my ($target,$token) = @_;
                   2974:     my $currentstring = '';
                   2975:     if ($target eq 'web') {
                   2976: 	$currentstring = $token->[2];    
                   2977:     } 
                   2978:     return $currentstring;
                   2979: }
                   2980: 
1.181     sakharuk 2981: #-- <blockquote> tag (end tag required)
1.122     albertel 2982: sub start_blockquote {
                   2983:     my ($target,$token) = @_;
                   2984:     my $currentstring = '';
                   2985:     if ($target eq 'web') {
                   2986: 	$currentstring = $token->[4];     
                   2987:     } 
                   2988:     return $currentstring;
                   2989: }
                   2990: 
                   2991: sub end_blockquote {
                   2992:     my ($target,$token) = @_;
                   2993:     my $currentstring = '';
                   2994:     if ($target eq 'web') {
                   2995: 	$currentstring = $token->[2];    
                   2996:     } 
                   2997:     return $currentstring;
                   2998: }
                   2999: 
1.181     sakharuk 3000: #-- <button> tag (end tag required)
1.122     albertel 3001: sub start_button {
                   3002:     my ($target,$token) = @_;
                   3003:     my $currentstring = '';
                   3004:     if ($target eq 'web') {
                   3005: 	$currentstring = $token->[4];     
                   3006:     } 
                   3007:     return $currentstring;
                   3008: }
                   3009: 
                   3010: sub end_button {
                   3011:     my ($target,$token) = @_;
                   3012:     my $currentstring = '';
                   3013:     if ($target eq 'web') {
                   3014: 	$currentstring = $token->[2];    
                   3015:     } 
                   3016:     return $currentstring;
                   3017: }
                   3018: 
1.181     sakharuk 3019: #-- <caption> tag (end tag required)
1.122     albertel 3020: sub start_caption {
                   3021:     my ($target,$token) = @_;
                   3022:     my $currentstring = '';
                   3023:     if ($target eq 'web') {
                   3024: 	$currentstring = $token->[4];     
                   3025:     } 
                   3026:     return $currentstring;
                   3027: }
                   3028: 
                   3029: sub end_caption {
                   3030:     my ($target,$token) = @_;
                   3031:     my $currentstring = '';
                   3032:     if ($target eq 'web') {
                   3033: 	$currentstring = $token->[2];    
                   3034:     } 
                   3035:     return $currentstring;
                   3036: }
                   3037: 
1.181     sakharuk 3038: #-- <col> tag (end tag forbdden)
1.122     albertel 3039: sub start_col {
                   3040:     my ($target,$token) = @_;
                   3041:     my $currentstring = '';
                   3042:     if ($target eq 'web') {
                   3043: 	$currentstring = $token->[4];     
                   3044:     } 
                   3045:     return $currentstring;
                   3046: }
                   3047: 
                   3048: sub end_col {
                   3049:     my ($target,$token) = @_;
                   3050:     my $currentstring = '';
                   3051:     if ($target eq 'web') {
                   3052: 	$currentstring = $token->[2];    
                   3053:     } 
                   3054:     return $currentstring;
                   3055: }
                   3056: 
1.181     sakharuk 3057: #-- <colgroup> tag (end tag optional)
1.122     albertel 3058: sub start_colgroup {
                   3059:     my ($target,$token) = @_;
                   3060:     my $currentstring = '';
                   3061:     if ($target eq 'web') {
                   3062: 	$currentstring = $token->[4];     
                   3063:     } 
                   3064:     return $currentstring;
                   3065: }
                   3066: 
                   3067: sub end_colgroup {
                   3068:     my ($target,$token) = @_;
                   3069:     my $currentstring = '';
                   3070:     if ($target eq 'web') {
                   3071: 	$currentstring = $token->[2];    
                   3072:     } 
                   3073:     return $currentstring;
                   3074: }
                   3075: 
1.181     sakharuk 3076: #-- <del> tag (end tag required)
1.122     albertel 3077: sub start_del {
                   3078:     my ($target,$token) = @_;
                   3079:     my $currentstring = '';
                   3080:     if ($target eq 'web') {
                   3081: 	$currentstring = $token->[4];     
                   3082:     } 
                   3083:     return $currentstring;
                   3084: }
                   3085: 
                   3086: sub end_del {
                   3087:     my ($target,$token) = @_;
                   3088:     my $currentstring = '';
                   3089:     if ($target eq 'web') {
                   3090: 	$currentstring = $token->[2];    
                   3091:     } 
                   3092:     return $currentstring;
                   3093: }
                   3094: 
1.181     sakharuk 3095: #-- <fieldset> tag (end tag required)
1.122     albertel 3096: sub start_fieldset {
                   3097:     my ($target,$token) = @_;
                   3098:     my $currentstring = '';
                   3099:     if ($target eq 'web') {
                   3100: 	$currentstring = $token->[4];     
                   3101:     } 
                   3102:     return $currentstring;
                   3103: }
                   3104: 
                   3105: sub end_fieldset {
                   3106:     my ($target,$token) = @_;
                   3107:     my $currentstring = '';
                   3108:     if ($target eq 'web') {
                   3109: 	$currentstring = $token->[2];    
                   3110:     } 
                   3111:     return $currentstring;
                   3112: }
                   3113: 
1.181     sakharuk 3114: #-- <frame> tag (end tag forbidden)
1.122     albertel 3115: sub start_frame {
                   3116:     my ($target,$token) = @_;
                   3117:     my $currentstring = '';
                   3118:     if ($target eq 'web') {
                   3119: 	$currentstring = $token->[4];     
                   3120:     } 
                   3121:     return $currentstring;
                   3122: }
                   3123: 
                   3124: sub end_frame {
                   3125:     my ($target,$token) = @_;
                   3126:     my $currentstring = '';
                   3127:     if ($target eq 'web') {
                   3128: 	$currentstring = $token->[2];    
                   3129:     } 
                   3130:     return $currentstring;
                   3131: }
                   3132: 
1.181     sakharuk 3133: #-- <iframe> tag (end tag required)
1.122     albertel 3134: sub start_iframe {
                   3135:     my ($target,$token) = @_;
                   3136:     my $currentstring = '';
                   3137:     if ($target eq 'web') {
                   3138: 	$currentstring = $token->[4];     
                   3139:     } 
                   3140:     return $currentstring;
                   3141: }
                   3142: 
                   3143: sub end_iframe {
                   3144:     my ($target,$token) = @_;
                   3145:     my $currentstring = '';
                   3146:     if ($target eq 'web') {
                   3147: 	$currentstring = $token->[2];    
                   3148:     } 
                   3149:     return $currentstring;
                   3150: }
                   3151: 
1.181     sakharuk 3152: #-- <ins> tag (end tag required)
1.122     albertel 3153: sub start_ins {
                   3154:     my ($target,$token) = @_;
                   3155:     my $currentstring = '';
                   3156:     if ($target eq 'web') {
                   3157: 	$currentstring = $token->[4];     
                   3158:     } 
                   3159:     return $currentstring;
                   3160: }
                   3161: 
                   3162: sub end_ins {
                   3163:     my ($target,$token) = @_;
                   3164:     my $currentstring = '';
                   3165:     if ($target eq 'web') {
                   3166: 	$currentstring = $token->[2];    
                   3167:     } 
                   3168:     return $currentstring;
                   3169: }
                   3170: 
1.181     sakharuk 3171: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3172: sub start_isindex {
                   3173:     my ($target,$token) = @_;
                   3174:     my $currentstring = '';
                   3175:     if ($target eq 'web') {
                   3176: 	$currentstring = $token->[4];     
                   3177:     } 
                   3178:     return $currentstring;
                   3179: }
                   3180: 
                   3181: sub end_isindex {
                   3182:     my ($target,$token) = @_;
                   3183:     my $currentstring = '';
                   3184:     if ($target eq 'web') {
                   3185: 	$currentstring = $token->[2];    
                   3186:     } 
                   3187:     return $currentstring;
                   3188: }
                   3189: 
1.181     sakharuk 3190: #-- <keygen> tag (end tag forbidden)
1.122     albertel 3191: sub start_keygen {
                   3192:     my ($target,$token) = @_;
                   3193:     my $currentstring = '';
                   3194:     if ($target eq 'web') {
                   3195: 	$currentstring = $token->[4];     
                   3196:     } 
                   3197:     return $currentstring;
                   3198: }
                   3199: 
                   3200: sub end_keygen {
                   3201:     my ($target,$token) = @_;
                   3202:     my $currentstring = '';
                   3203:     if ($target eq 'web') {
                   3204: 	$currentstring = $token->[2];    
                   3205:     } 
                   3206:     return $currentstring;
                   3207: }
                   3208: 
                   3209: #-- <label> tag
                   3210: sub start_label {
                   3211:     my ($target,$token) = @_;
                   3212:     my $currentstring = '';
                   3213:     if ($target eq 'web') {
                   3214: 	$currentstring = $token->[4];     
                   3215:     } 
                   3216:     return $currentstring;
                   3217: }
                   3218: 
                   3219: sub end_label {
                   3220:     my ($target,$token) = @_;
                   3221:     my $currentstring = '';
                   3222:     if ($target eq 'web') {
                   3223: 	$currentstring = $token->[2];    
                   3224:     } 
                   3225:     return $currentstring;
                   3226: }
                   3227: 
1.181     sakharuk 3228: #-- <layer> tag (end tag required)
1.122     albertel 3229: sub start_layer {
                   3230:     my ($target,$token) = @_;
                   3231:     my $currentstring = '';
                   3232:     if ($target eq 'web') {
                   3233: 	$currentstring = $token->[4];     
                   3234:     } 
                   3235:     return $currentstring;
                   3236: }
                   3237: 
                   3238: sub end_layer {
                   3239:     my ($target,$token) = @_;
                   3240:     my $currentstring = '';
                   3241:     if ($target eq 'web') {
                   3242: 	$currentstring = $token->[2];    
                   3243:     } 
                   3244:     return $currentstring;
                   3245: }
                   3246: 
1.181     sakharuk 3247: #-- <legend> tag (end tag required)
1.122     albertel 3248: sub start_legend {
                   3249:     my ($target,$token) = @_;
                   3250:     my $currentstring = '';
                   3251:     if ($target eq 'web') {
                   3252: 	$currentstring = $token->[4];     
                   3253:     } 
                   3254:     return $currentstring;
                   3255: }
                   3256: 
                   3257: sub end_legend {
                   3258:     my ($target,$token) = @_;
                   3259:     my $currentstring = '';
                   3260:     if ($target eq 'web') {
                   3261: 	$currentstring = $token->[2];    
                   3262:     } 
                   3263:     return $currentstring;
                   3264: }
                   3265: 
1.181     sakharuk 3266: #-- <link> tag (end tag forbidden)
1.122     albertel 3267: sub start_link {
                   3268:     my ($target,$token) = @_;
                   3269:     my $currentstring = '';
                   3270:     if ($target eq 'web') {
                   3271: 	$currentstring = $token->[4];     
                   3272:     } 
                   3273:     return $currentstring;
                   3274: }
                   3275: 
                   3276: sub end_link {
                   3277:     my ($target,$token) = @_;
                   3278:     my $currentstring = '';
                   3279:     if ($target eq 'web') {
                   3280: 	$currentstring = $token->[2];    
                   3281:     } 
                   3282:     return $currentstring;
                   3283: }
                   3284: 
1.181     sakharuk 3285: #-- <marquee> tag (end tag optional)
1.122     albertel 3286: sub start_marquee {
                   3287:     my ($target,$token) = @_;
                   3288:     my $currentstring = '';
                   3289:     if ($target eq 'web') {
                   3290: 	$currentstring = $token->[4];     
                   3291:     } 
                   3292:     return $currentstring;
                   3293: }
                   3294: 
                   3295: sub end_marquee {
                   3296:     my ($target,$token) = @_;
                   3297:     my $currentstring = '';
                   3298:     if ($target eq 'web') {
                   3299: 	$currentstring = $token->[2];    
                   3300:     } 
                   3301:     return $currentstring;
                   3302: }
                   3303: 
1.179     sakharuk 3304: #-- <multicol> tag (end tag required)
                   3305: sub start_multicol {
1.122     albertel 3306:     my ($target,$token) = @_;
                   3307:     my $currentstring = '';
                   3308:     if ($target eq 'web') {
                   3309: 	$currentstring = $token->[4];     
                   3310:     } 
                   3311:     return $currentstring;
                   3312: }
                   3313: 
1.179     sakharuk 3314: sub end_multicol {
1.122     albertel 3315:     my ($target,$token) = @_;
                   3316:     my $currentstring = '';
                   3317:     if ($target eq 'web') {
                   3318: 	$currentstring = $token->[2];    
                   3319:     } 
                   3320:     return $currentstring;
                   3321: }
                   3322: 
1.179     sakharuk 3323: #-- <nobr> tag (end tag required)
1.122     albertel 3324: sub start_nobr {
                   3325:     my ($target,$token) = @_;
                   3326:     my $currentstring = '';
                   3327:     if ($target eq 'web') {
                   3328: 	$currentstring = $token->[4];     
1.179     sakharuk 3329:     }  elsif ($target eq 'tex') {
                   3330: 	$currentstring='\mbox{';
                   3331:     }
1.122     albertel 3332:     return $currentstring;
                   3333: }
                   3334: 
                   3335: sub end_nobr {
                   3336:     my ($target,$token) = @_;
                   3337:     my $currentstring = '';
                   3338:     if ($target eq 'web') {
                   3339: 	$currentstring = $token->[2];    
1.179     sakharuk 3340:     }   elsif ($target eq 'tex') {
                   3341: 	$currentstring='}';
                   3342:     }
1.122     albertel 3343:     return $currentstring;
                   3344: }
                   3345: 
1.179     sakharuk 3346: #-- <noembed> tag (end tag required)
1.122     albertel 3347: sub start_noembed {
                   3348:     my ($target,$token) = @_;
                   3349:     my $currentstring = '';
                   3350:     if ($target eq 'web') {
                   3351: 	$currentstring = $token->[4];     
                   3352:     } 
                   3353:     return $currentstring;
                   3354: }
                   3355: 
                   3356: sub end_noembed {
                   3357:     my ($target,$token) = @_;
                   3358:     my $currentstring = '';
                   3359:     if ($target eq 'web') {
                   3360: 	$currentstring = $token->[2];    
                   3361:     } 
                   3362:     return $currentstring;
                   3363: }
                   3364: 
1.179     sakharuk 3365: #-- <noframes> tag (end tag required)
1.122     albertel 3366: sub start_noframes {
                   3367:     my ($target,$token) = @_;
                   3368:     my $currentstring = '';
                   3369:     if ($target eq 'web') {
                   3370: 	$currentstring = $token->[4];     
                   3371:     } 
                   3372:     return $currentstring;
                   3373: }
                   3374: 
                   3375: sub end_noframes {
                   3376:     my ($target,$token) = @_;
                   3377:     my $currentstring = '';
                   3378:     if ($target eq 'web') {
                   3379: 	$currentstring = $token->[2];    
                   3380:     } 
                   3381:     return $currentstring;
                   3382: }
                   3383: 
1.179     sakharuk 3384: #-- <nolayer> tag (end tag required)
1.122     albertel 3385: sub start_nolayer {
                   3386:     my ($target,$token) = @_;
                   3387:     my $currentstring = '';
                   3388:     if ($target eq 'web') {
                   3389: 	$currentstring = $token->[4];     
                   3390:     } 
                   3391:     return $currentstring;
                   3392: }
                   3393: 
                   3394: sub end_nolayer {
                   3395:     my ($target,$token) = @_;
                   3396:     my $currentstring = '';
                   3397:     if ($target eq 'web') {
                   3398: 	$currentstring = $token->[2];    
                   3399:     } 
                   3400:     return $currentstring;
                   3401: }
                   3402: 
1.179     sakharuk 3403: #-- <noscript> tag (end tag required)
1.122     albertel 3404: sub start_noscript {
                   3405:     my ($target,$token) = @_;
                   3406:     my $currentstring = '';
                   3407:     if ($target eq 'web') {
                   3408: 	$currentstring = $token->[4];     
                   3409:     } 
                   3410:     return $currentstring;
                   3411: }
                   3412: 
                   3413: sub end_noscript {
                   3414:     my ($target,$token) = @_;
                   3415:     my $currentstring = '';
                   3416:     if ($target eq 'web') {
                   3417: 	$currentstring = $token->[2];    
                   3418:     } 
                   3419:     return $currentstring;
                   3420: }
                   3421: 
1.179     sakharuk 3422: #-- <object> tag (end tag required)
1.122     albertel 3423: sub start_object {
                   3424:     my ($target,$token) = @_;
                   3425:     my $currentstring = '';
                   3426:     if ($target eq 'web') {
                   3427: 	$currentstring = $token->[4];     
                   3428:     } 
                   3429:     return $currentstring;
                   3430: }
                   3431: 
                   3432: sub end_object {
                   3433:     my ($target,$token) = @_;
                   3434:     my $currentstring = '';
                   3435:     if ($target eq 'web') {
                   3436: 	$currentstring = $token->[2];    
                   3437:     } 
                   3438:     return $currentstring;
                   3439: }
                   3440: 
1.179     sakharuk 3441: #-- <optgroup> tag (end tag required)
1.122     albertel 3442: sub start_optgroup {
                   3443:     my ($target,$token) = @_;
                   3444:     my $currentstring = '';
                   3445:     if ($target eq 'web') {
                   3446: 	$currentstring = $token->[4];     
                   3447:     } 
                   3448:     return $currentstring;
                   3449: }
                   3450: 
                   3451: sub end_optgroup {
                   3452:     my ($target,$token) = @_;
                   3453:     my $currentstring = '';
                   3454:     if ($target eq 'web') {
                   3455: 	$currentstring = $token->[2];    
                   3456:     } 
                   3457:     return $currentstring;
                   3458: }
                   3459: 
1.179     sakharuk 3460: #-- <samp> tag (end tag required)
1.122     albertel 3461: sub start_samp {
                   3462:     my ($target,$token) = @_;
                   3463:     my $currentstring = '';
                   3464:     if ($target eq 'web') {
                   3465: 	$currentstring = $token->[4];     
1.179     sakharuk 3466:     } elsif ($target eq 'tex') {
                   3467: 	$currentstring='\texttt{';
                   3468:     }
1.122     albertel 3469:     return $currentstring;
                   3470: }
                   3471: 
                   3472: sub end_samp {
                   3473:     my ($target,$token) = @_;
                   3474:     my $currentstring = '';
                   3475:     if ($target eq 'web') {
                   3476: 	$currentstring = $token->[2];    
1.179     sakharuk 3477:     } elsif ($target eq 'tex') {
                   3478: 	$currentstring='}';
                   3479:     }
1.122     albertel 3480:     return $currentstring;
                   3481: }
                   3482: 
                   3483: #-- <server> tag
                   3484: sub start_server {
                   3485:     my ($target,$token) = @_;
                   3486:     my $currentstring = '';
                   3487:     if ($target eq 'web') {
                   3488: 	$currentstring = $token->[4];     
                   3489:     } 
                   3490:     return $currentstring;
                   3491: }
                   3492: 
                   3493: sub end_server {
                   3494:     my ($target,$token) = @_;
                   3495:     my $currentstring = '';
                   3496:     if ($target eq 'web') {
                   3497: 	$currentstring = $token->[2];    
                   3498:     } 
                   3499:     return $currentstring;
                   3500: }
                   3501: 
1.179     sakharuk 3502: #-- <spacer> tag (end tag forbidden)
1.122     albertel 3503: sub start_spacer {
                   3504:     my ($target,$token) = @_;
                   3505:     my $currentstring = '';
                   3506:     if ($target eq 'web') {
                   3507: 	$currentstring = $token->[4];     
                   3508:     } 
                   3509:     return $currentstring;
                   3510: }
                   3511: 
                   3512: sub end_spacer {
                   3513:     my ($target,$token) = @_;
                   3514:     my $currentstring = '';
                   3515:     if ($target eq 'web') {
                   3516: 	$currentstring = $token->[2];    
                   3517:     } 
                   3518:     return $currentstring;
                   3519: }
                   3520: 
1.179     sakharuk 3521: #-- <span> tag (end tag required)
1.122     albertel 3522: sub start_span {
                   3523:     my ($target,$token) = @_;
                   3524:     my $currentstring = '';
                   3525:     if ($target eq 'web') {
                   3526: 	$currentstring = $token->[4];     
                   3527:     } 
                   3528:     return $currentstring;
                   3529: }
                   3530: 
                   3531: sub end_span {
                   3532:     my ($target,$token) = @_;
                   3533:     my $currentstring = '';
                   3534:     if ($target eq 'web') {
                   3535: 	$currentstring = $token->[2];    
                   3536:     } 
                   3537:     return $currentstring;
                   3538: }
                   3539: 
1.179     sakharuk 3540: #-- <tbody> tag (end tag optional)
1.122     albertel 3541: sub start_tbody {
                   3542:     my ($target,$token) = @_;
                   3543:     my $currentstring = '';
                   3544:     if ($target eq 'web') {
                   3545: 	$currentstring = $token->[4];     
                   3546:     } 
                   3547:     return $currentstring;
                   3548: }
                   3549: 
                   3550: sub end_tbody {
                   3551:     my ($target,$token) = @_;
                   3552:     my $currentstring = '';
                   3553:     if ($target eq 'web') {
                   3554: 	$currentstring = $token->[2];    
                   3555:     } 
                   3556:     return $currentstring;
                   3557: }
                   3558: 
1.166     sakharuk 3559: #-- <tfoot> tag (end tag optional)
1.122     albertel 3560: sub start_tfoot {
                   3561:     my ($target,$token) = @_;
                   3562:     my $currentstring = '';
                   3563:     if ($target eq 'web') {
                   3564: 	$currentstring = $token->[4];     
                   3565:     } 
                   3566:     return $currentstring;
                   3567: }
                   3568: 
                   3569: sub end_tfoot {
                   3570:     my ($target,$token) = @_;
                   3571:     my $currentstring = '';
                   3572:     if ($target eq 'web') {
                   3573: 	$currentstring = $token->[2];    
                   3574:     } 
                   3575:     return $currentstring;
                   3576: }
                   3577: 
1.166     sakharuk 3578: #-- <thead> tag (end tag optional)
1.122     albertel 3579: sub start_thead {
                   3580:     my ($target,$token) = @_;
                   3581:     my $currentstring = '';
                   3582:     if ($target eq 'web') {
                   3583: 	$currentstring = $token->[4];     
                   3584:     } 
                   3585:     return $currentstring;
                   3586: }
1.10      www      3587: 
1.122     albertel 3588: sub end_thead {
                   3589:     my ($target,$token) = @_;
                   3590:     my $currentstring = '';
                   3591:     if ($target eq 'web') {
                   3592: 	$currentstring = $token->[2];    
                   3593:     } 
                   3594:     return $currentstring;
                   3595: }
1.119     www      3596: 
1.122     albertel 3597: #-- <var> tag
                   3598: sub start_var {
1.44      sakharuk 3599:     my ($target,$token) = @_;
                   3600:     my $currentstring = '';
                   3601:     if ($target eq 'web') {
1.122     albertel 3602: 	$currentstring = $token->[4];     
1.163     sakharuk 3603:     } elsif ($target eq 'tex') {
                   3604: 	$currentstring = '\textit{'; 
                   3605:     }
1.44      sakharuk 3606:     return $currentstring;
                   3607: }
1.10      www      3608: 
1.122     albertel 3609: sub end_var {
                   3610:     my ($target,$token) = @_;
1.44      sakharuk 3611:     my $currentstring = '';
                   3612:     if ($target eq 'web') {
1.163     sakharuk 3613: 	$currentstring = $token->[2];
                   3614:     } elsif ($target eq 'tex') {
                   3615: 	$currentstring = '}'; 
1.44      sakharuk 3616:     } 
                   3617:     return $currentstring;
                   3618: }
1.119     www      3619: 
1.163     sakharuk 3620: #-- <wbr> tag (end tag forbidden)
1.122     albertel 3621: sub start_wbr {
                   3622:     my ($target,$token) = @_;
                   3623:     my $currentstring = '';
                   3624:     if ($target eq 'web') {
                   3625: 	$currentstring = $token->[4];     
                   3626:     } 
                   3627:     return $currentstring;
1.98      albertel 3628: }
                   3629: 
1.122     albertel 3630: sub end_wbr {
                   3631:     my ($target,$token) = @_;
                   3632:     my $currentstring = '';
                   3633:     if ($target eq 'web') {
                   3634: 	$currentstring = $token->[2];    
                   3635:     } 
                   3636:     return $currentstring;
1.98      albertel 3637: }
1.134     sakharuk 3638: 
                   3639: #-- <hideweboutput> tag
                   3640: sub start_hideweboutput {
                   3641:     my ($target,$token) = @_;
                   3642:     if ($target eq 'web') {
                   3643: 	&Apache::lonxml::startredirection();     
                   3644:     } 
                   3645:     return '';
                   3646: }
                   3647: 
                   3648: sub end_hideweboutput {
                   3649:     my ($target,$token) = @_;
                   3650:     my $currentstring = '';
                   3651:     if ($target eq 'web') {
                   3652: 	$currentstring = &Apache::lonxml::endredirection();    
                   3653:     } 
                   3654:     return '';
                   3655: }
                   3656: 
1.94      sakharuk 3657: 
                   3658: sub image_replication {
                   3659:     my $src = shift;
1.187     albertel 3660:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   3661:     #replicates eps or ps 
                   3662:     my $epssrc = my $pssrc = $src;
                   3663:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   3664:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   3665:     if (not -e $epssrc && not -e $pssrc) {
                   3666: 	my $result=&Apache::lonnet::repcopy($epssrc);
                   3667: 	if ($result ne OK) { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 3668:     }
                   3669:     return '';
1.195     sakharuk 3670: }
                   3671: 
1.197     sakharuk 3672: sub image_size {
                   3673:     my ($src,$scaling,$parstack,$safeeval)=@_;
                   3674:     #size of image from gif/jpg/jpeg/png 
                   3675:     my $image = Image::Magick->new;
                   3676:     my $current_figure = $image->Read($src);
                   3677:     my $width_param = $image->Get('width') * $scaling;;
                   3678:     my $height_param = $image->Get('height') * $scaling;;
                   3679:     undef $image;
                   3680:     #do we have any specified LaTeX size of the picture?
                   3681:     my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);
                   3682:     my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);
                   3683:     #do we have any specified web size of the picture?
                   3684:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
                   3685: 					   undef,1);
                   3686:     if ($TeXwidth ne '') {  
                   3687: 	if ($TeXwidth=~/(\d+)\s*\%/) {
                   3688: 	    $width_param = $1*$ENV{'form.textwidth'}/100;
                   3689: 	} else { 
                   3690: 	    $width_param = $TeXwidth;
                   3691: 	}
                   3692:     } elsif ($TeXheight ne '') {
                   3693: 	$width_param = $TeXheight/$height_param*$width_param;
                   3694:     } elsif ($width ne '') {
                   3695: 	$width_param = $width*$scaling;      
                   3696:     }
                   3697:     if ($width_param > $ENV{'form.textwidth'}) {$width_param =0.95*$ENV{'form.textwidth'}}
                   3698:     return $width_param;
                   3699: }
                   3700: 
1.195     sakharuk 3701: sub eps_generation {
                   3702:     my ($src,$file,$width_param) = @_;	     
                   3703:     my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
                   3704:     my $temp_file = Apache::File->new('>>'.$filename); 
                   3705:     print $temp_file "$src\n";
                   3706:     my $newsrc = $src;
                   3707:     $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
                   3708:     $newsrc=~s/\/home\/httpd\/html\/res//;
                   3709:     $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
                   3710:     $newsrc=~s/\/\.\//\//;
                   3711:     $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
1.213     sakharuk 3712:     if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
                   3713: 	$newsrc=~s/\/home\/httpd\/lonUsers//;
                   3714: 	$newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
                   3715:     }
1.239     sakharuk 3716:     if ($newsrc=~/\/userfiles\//) {
                   3717: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   3718:     } else {
                   3719: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   3720:     }
1.197     sakharuk 3721: }
                   3722: 
                   3723: sub file_path {     
                   3724:     my $src=shift;
                   3725:     my ($file,$path); 
                   3726:     if ($src =~ m!(.*)/([^/]*)$!) {
                   3727: 	$file = $2; 
                   3728: 	$path = $1.'/'; 
                   3729:     } 
                   3730:     return $file,$path;
1.126     sakharuk 3731: }
                   3732: 
                   3733: sub recalc {
                   3734:     my $argument = shift;
                   3735:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 3736:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 3737:     my $value=$1;
                   3738:     my $units=$2;
                   3739:     if ($units eq 'cm') {
                   3740: 	$value*=10;
                   3741:     } elsif ($units eq 'in') {
                   3742: 	$value*=25.4;
                   3743:     } elsif ($units eq 'pc') {
                   3744: 	$value*=(25.4*12/72.27);
                   3745:     } elsif ($units eq 'pt') {
                   3746: 	$value*=(25.4/72.27);
                   3747:     }
                   3748:     return $value.' mm';
1.94      sakharuk 3749: }
1.184     sakharuk 3750: 
                   3751: sub LATEX_length {
                   3752:     my $garbage=shift;
1.206     sakharuk 3753:     $garbage=~s/^\s+$//;
                   3754:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   3755:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   3756:     $garbage=~s/(\s)+/$1/;#only one space
                   3757:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   3758:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   3759:     $garbage=~s/([^\\])\$/$1/g;#$
                   3760:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   3761:    $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 3762:     $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;
                   3763:     $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;
                   3764:     $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 3765:     $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;
                   3766:     $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;
                   3767:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   3768:     #remove some other LaTeX command
                   3769:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   3770:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   3771:     $garbage=~s|\+|11|g;
1.184     sakharuk 3772:     my  $value=length($garbage);
                   3773:     return $value;
                   3774: }
                   3775: 
                   3776: 
                   3777: 
1.94      sakharuk 3778: 
1.1       sakharuk 3779: 1;
                   3780: __END__

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