Annotation of loncom/xml/londefdef.pm, revision 1.307

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

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