Annotation of loncom/xml/londefdef.pm, revision 1.302.2.3

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.302.2.3! albertel    4: # $Id: londefdef.pm,v 1.302.2.2 2006/01/09 22:54:47 albertel Exp $
1.41      sakharuk    5: # 
1.34      www         6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
1.156     sakharuk   28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
1.34      www        29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
                     30: # binary executable programs or libraries distributed by the 
                     31: # Michigan State University (the "Licensee"), but any binaries so 
                     32: # distributed are hereby licensed only for use in the context
                     33: # of a program or computational system for which the Licensee is the 
                     34: # primary author or distributor, and which performs substantial 
                     35: # additional tasks beyond the translation of (La)TeX into HTML.
                     36: # The C source of the Code may not be distributed by the Licensee
                     37: # to any other parties under any circumstances.
                     38: #
1.1       sakharuk   39: 
1.2       albertel   40: package Apache::londefdef; 
1.1       sakharuk   41: 
1.267     albertel   42: use Apache::lonnet;
1.1       sakharuk   43: use strict;
1.124     sakharuk   44: use Apache::lonxml;
1.57      sakharuk   45: use Apache::File();
1.70      sakharuk   46: use Image::Magick;
1.118     www        47: use Apache::lonmenu();
                     48: use Apache::lonmeta();
1.187     albertel   49: use Apache::Constants qw(:common);
1.282     foxr       50: use File::Basename;
1.302     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: #    }
                     73: #}
1.188     albertel   74: sub initialize_londefdef {
                     75:     $Apache::londefdef::TD_redirection=0;
                     76:     @Apache::londefdef::table = ();
                     77:     $Apache::londefdef::select=0;
1.243     albertel   78:     undef(@Apache::londefdef::description);
                     79:     @Apache::londefdef::DD=(0);
                     80:     @Apache::londefdef::DT=(0);
1.244     albertel   81:     @Apache::londefdef::seenDT=(0);
1.238     albertel   82:     $Apache::londefdef::list_index=0;
1.3       sakharuk   83: }
1.1       sakharuk   84: 
1.35      sakharuk   85: #======================= TAG SUBROUTINES =====================
1.8       sakharuk   86: #-- <output>
1.21      albertel   87: sub start_output {
1.122     albertel   88:     my ($target) = @_;
                     89:     if ($target eq 'meta') { $Apache::lonxml::metamode--; }
                     90:     return '';
1.21      albertel   91: }
                     92: sub end_output {
1.122     albertel   93:     my ($target) = @_;
                     94:     if ($target eq 'meta') { $Apache::lonxml::metamode++; }
                     95:     return '';
1.21      albertel   96: }
1.4       sakharuk   97: #-- <m> tag
1.33      albertel   98: sub start_m {
1.190     albertel   99:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  100:     my $currentstring = '';
1.193     albertel  101:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
1.191     albertel  102:     if ($target eq 'web' || $target eq 'analyze') {
1.122     albertel  103: 	&Apache::lonxml::debug("M is starting with:$inside:");
                    104: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    105: 	if ($eval eq 'on') {
                    106: 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
                    107: 	    #&Apache::lonxml::debug("M is evaulated to:$inside:");
                    108: 	}
1.276     albertel  109: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                    110: 	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
1.122     albertel  111: 	if ($Apache::lontexconvert::errorstring) {
                    112: 	    &Apache::lonxml::warning("tth error: ".
                    113: 				     $Apache::lontexconvert::errorstring);
                    114: 	    $Apache::lontexconvert::errorstring='';
                    115: 	}
                    116: 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
1.178     albertel  117: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  118:     } elsif ($target eq 'tex') {
1.190     albertel  119: 	$currentstring = $inside;
1.178     albertel  120: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    121: 	if ($eval eq 'on') {
                    122: 	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
                    123: 	}
1.122     albertel  124: 	if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
1.257     albertel  125: 	# detect simple math mode entry exits, and convert them
                    126:         # to use \ensuremath
                    127: 	if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
1.293     albertel  128: 	    $currentstring=~s/^(\s*)\$/$1/;
                    129: 	    $currentstring=~s/\$(\s*)$/$1/;
1.257     albertel  130: 	    $currentstring='\ensuremath{'.$currentstring.'}';
                    131: 	}
1.178     albertel  132: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  133:     }
                    134:     return $currentstring;
1.33      albertel  135: }
1.122     albertel  136: 
1.33      albertel  137: sub end_m {
1.122     albertel  138:     my ($target,$token) = @_;
                    139:     my $currentstring = '';
1.204     albertel  140:     if ($target eq 'tex') {
1.122     albertel  141: 	$currentstring = "";
                    142:     }
                    143:     return $currentstring;
1.33      albertel  144: }
1.110     albertel  145: 
                    146: sub start_tthoption {
1.299     albertel  147:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  148:     my $result;
                    149:     if ($target eq 'web') {
1.299     albertel  150: 	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
                    151: 						   $style);
1.122     albertel  152: 	$inside=~s/^\s*//;
1.267     albertel  153: 	if ($env{'browser.mathml'}) {
1.122     albertel  154: 	    &tth::ttmoptions($inside);
                    155: 	} else {
                    156: 	    &tth::tthoptions($inside);
                    157: 	}
                    158:     }
                    159:     return $result;
1.110     albertel  160: }
                    161: 
                    162: sub end_tthoption {
1.122     albertel  163:     my ($target,$token) = @_;
                    164:     my $result;
                    165:     return $result;
1.110     albertel  166: }
                    167: 
1.181     sakharuk  168: #-- <html> tag (end tag optional)
1.100     albertel  169: sub start_html {
                    170:     my ($target,$token) = @_;
                    171:     my $currentstring = '';
1.267     albertel  172:     my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
1.196     albertel  173:     &Apache::lontexconvert::init_tth();
1.269     albertel  174:     if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
1.242     albertel  175: 	$currentstring = &Apache::lonxml::xmlbegin();
1.100     albertel  176:     } elsif ($target eq 'tex') {
1.246     albertel  177: 	$currentstring .= '\documentclass[letterpaper]{article}';
1.267     albertel  178: 	if (($env{'form.latex_type'}=~'batchmode') ||
                    179:             (!$env{'request.role.adv'})) {$currentstring .='\batchmode';} 
1.217     sakharuk  180: 	$currentstring .= '\newcommand{\keephidden}[1]{}'.
                    181:                           '\renewcommand{\deg}{$^{\circ}$}'.
                    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 $currentstring;
                    595: }
                    596: 
1.302.2.1  albertel  597: # \begin{center} causes a new paragprah spacing that looks odd inside 
                    598: # of a table cell
                    599: sub center_correction { return '\vspace*{-6 mm}'; }
1.181     sakharuk  600: #-- <center> tag (end tag required)
1.122     albertel  601: sub start_center {
1.302.2.1  albertel  602:     my ($target,$token,$tagstack) = @_;
1.279     foxr      603:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  604:     if ($target eq 'web') {
1.277     foxr      605: 	$currentstring .= $token->[4];     
1.122     albertel  606:     } elsif ($target eq 'tex') {
1.302.2.1  albertel  607: 	if (&is_inside_of($tagstack, "table")) {
                    608: 	    $currentstring .= &center_correction();
                    609: 	}
1.277     foxr      610: 	$currentstring .= '\begin{center}';  
1.144     sakharuk  611:     }
1.122     albertel  612:     return $currentstring;
                    613: }
                    614: 
                    615: sub end_center {
1.302.2.1  albertel  616:     my ($target,$token,$tagstack) = @_;
1.122     albertel  617:     my $currentstring = '';
                    618:     if ($target eq 'web') {
                    619: 	$currentstring = $token->[2];     
                    620:     } elsif ($target eq 'tex') {
                    621: 	$currentstring = '\end{center}';  
1.302.2.1  albertel  622: 	if (&is_inside_of($tagstack, "table")) {
1.302.2.3! albertel  623: 	    #$currentstring .= &center_correction();
1.302.2.1  albertel  624: 	}
1.144     sakharuk  625:     }
1.122     albertel  626:     return $currentstring;
                    627: }
                    628: 
1.181     sakharuk  629: #-- <b> tag (end tag required)
1.279     foxr      630: #      NOTE: In TeX mode disables internal <p>
1.122     albertel  631: sub start_b {
                    632:     my ($target,$token) = @_;
                    633:     my $currentstring = '';
                    634:     if ($target eq 'web') {
                    635: 	$currentstring = $token->[4];     
                    636:     } elsif ($target eq 'tex') {
1.279     foxr      637: 	&disable_para();
                    638: 	$currentstring .= '\textbf{';  
1.122     albertel  639:     } 
                    640:     return $currentstring;
                    641: }
                    642: 
                    643: sub end_b {
                    644:     my ($target,$token) = @_;
                    645:     my $currentstring = '';
                    646:     if ($target eq 'web') {
                    647: 	$currentstring = $token->[2];     
                    648:     } elsif ($target eq 'tex') {
1.279     foxr      649: 	&enable_para();
                    650: 	$currentstring = '}';
1.122     albertel  651:     } 
                    652:     return $currentstring;
                    653: }
1.35      sakharuk  654: 
1.181     sakharuk  655: #-- <strong> tag (end tag required)
1.279     foxr      656: #    NOTE: in TeX mode disables internal <p>
1.122     albertel  657: sub start_strong {
                    658:     my ($target,$token) = @_;
                    659:     my $currentstring = '';
                    660:     if ($target eq 'web') {
                    661: 	$currentstring = $token->[4];     
                    662:     } elsif ($target eq 'tex') {
1.279     foxr      663: 	&disable_para();
1.122     albertel  664: 	$currentstring = '\textbf{';  
                    665:     } 
                    666:     return $currentstring;
                    667: }
                    668: 
                    669: sub end_strong {
                    670:     my ($target,$token) = @_;
                    671:     my $currentstring = '';
1.182     sakharuk  672:     if ($target eq 'web') {	
1.122     albertel  673: 	$currentstring = $token->[2];     
                    674:     } elsif ($target eq 'tex') {
1.279     foxr      675: 	&enable_para();
1.122     albertel  676: 	$currentstring = '}';  
1.144     sakharuk  677:     }
1.122     albertel  678:     return $currentstring;
                    679: }
                    680: 
1.181     sakharuk  681: #-- <h1> tag (end tag required)
1.122     albertel  682: sub start_h1 {
1.125     sakharuk  683:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      684:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  685:     if ($target eq 'web') {
                    686: 	$currentstring .= $token->[4];
                    687:     } elsif ($target eq 'tex') {
1.125     sakharuk  688: 	my $pre;
1.199     albertel  689: 	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
1.212     sakharuk  690: 	if ($align eq 'center') {
1.125     sakharuk  691: 	    $pre='\begin{center}';
                    692: 	} elsif ($align eq 'left') {
                    693: 	    $pre='\rlap{';
                    694: 	} elsif ($align eq 'right') {
                    695: 	    $pre=' \hfill \llap{';
                    696: 	}
                    697: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    698: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      699: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  700:     } elsif ($target eq 'meta') {
1.277     foxr      701: 	$currentstring.='<subject>';
1.185     albertel  702: 	&start_output($target);
1.122     albertel  703:     }
                    704:     return $currentstring;
                    705: }
                    706: 
                    707: sub end_h1 {
1.125     sakharuk  708:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  709:     my $currentstring = '';
                    710:     if ($target eq 'web') {
                    711: 	$currentstring .= $token->[2];
                    712:     } elsif ($target eq 'tex') {
1.212     sakharuk  713: 	my $post='\vskip 0 mm ';
1.125     sakharuk  714: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  715: 	if ($align eq 'center') {
1.125     sakharuk  716: 	    $post='\end{center}';
                    717: 	} elsif ($align eq 'left') {
                    718: 	    $post='} \hfill'.'\vskip 0 mm ';
                    719: 	} elsif ($align eq 'right') {
                    720: 	    $post='}'.'\vskip 0 mm ';
                    721: 	}
                    722: 	$currentstring .= '}}'.$post;
1.122     albertel  723:     } elsif ($target eq 'meta') {
1.185     albertel  724: 	&end_output($target);
1.122     albertel  725: 	$currentstring='</subject>';
                    726:     } 
                    727:     return $currentstring;
                    728: }
                    729: 
1.35      sakharuk  730: #-- <h2> tag
1.122     albertel  731: sub start_h2 {
1.125     sakharuk  732:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      733:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  734:     if ($target eq 'web') {
                    735: 	$currentstring .= $token->[4];
                    736:     } elsif ($target eq 'tex') {
1.125     sakharuk  737: 	my $pre;
                    738: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  739: 	if ($align eq 'center') {
1.125     sakharuk  740: 	    $pre='\begin{center}';
                    741: 	} elsif ($align eq 'left') {
                    742: 	    $pre='\rlap{';
                    743: 	} elsif ($align eq 'right') {
                    744: 	    $pre=' \hfill \llap{';
                    745: 	}
                    746: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    747: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      748: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  749:     } 
                    750:     return $currentstring;
                    751: }
                    752: 
                    753: sub end_h2 {
1.125     sakharuk  754:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  755:     my $currentstring = '';
                    756:     if ($target eq 'web') {
                    757: 	$currentstring .= $token->[2];
                    758:     } elsif ($target eq 'tex') {
1.212     sakharuk  759: 	my $post='\vskip 0 mm ';
1.125     sakharuk  760: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  761: 	if ($align eq 'center') {
1.125     sakharuk  762: 	    $post='\end{center}';
                    763: 	} elsif ($align eq 'left') {
                    764: 	    $post='} \hfill'.'\vskip 0 mm ';
                    765: 	} elsif ($align eq 'right') {
                    766: 	    $post='}'.'\vskip 0 mm ';
                    767: 	}
                    768: 	$currentstring .= '}}'.$post;
1.122     albertel  769:     } 
                    770:     return $currentstring;
                    771: }
                    772: 
1.35      sakharuk  773: #-- <h3> tag
1.122     albertel  774: sub start_h3 {
1.125     sakharuk  775:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      776:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  777:     if ($target eq 'web') {
                    778: 	$currentstring .= $token->[4];
                    779:     } elsif ($target eq 'tex') {
1.125     sakharuk  780: 	my $pre;
                    781: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  782: 	if ($align eq 'center') {
1.125     sakharuk  783: 	    $pre='\begin{center}';
                    784: 	} elsif ($align eq 'left') {
                    785: 	    $pre='\rlap{';
                    786: 	} elsif ($align eq 'right') {
                    787: 	    $pre=' \hfill \llap{';
                    788: 	}
                    789: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    790: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      791: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  792:     } 
                    793:     return $currentstring;
                    794: }
                    795: 
                    796: sub end_h3 {
1.125     sakharuk  797:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  798:     my $currentstring = '';
                    799:     if ($target eq 'web') {
                    800: 	$currentstring .= $token->[2];
                    801:     } elsif ($target eq 'tex') {
1.212     sakharuk  802: 	my $post='\vskip 0 mm ';
1.125     sakharuk  803: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  804: 	if ($align eq 'center') {
1.125     sakharuk  805: 	    $post='\end{center}';
                    806: 	} elsif ($align eq 'left') {
                    807: 	    $post='} \hfill'.'\vskip 0 mm ';
                    808: 	} elsif ($align eq 'right') {
                    809: 	    $post='}'.'\vskip 0 mm ';
                    810: 	}
                    811: 	$currentstring .= '}}'.$post;
1.122     albertel  812:     } 
                    813:     return $currentstring;
                    814: }
                    815: 
1.35      sakharuk  816: #-- <h4> tag
1.122     albertel  817: sub start_h4 {
1.125     sakharuk  818:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      819:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  820:     if ($target eq 'web') {
                    821: 	$currentstring .= $token->[4];
                    822:     } elsif ($target eq 'tex') {
1.125     sakharuk  823: 	my $pre;
                    824: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  825: 	if ($align eq 'center') {
1.125     sakharuk  826: 	    $pre='\begin{center}';
                    827: 	} elsif ($align eq 'left') {
                    828: 	    $pre='\rlap{';
                    829: 	} elsif ($align eq 'right') {
                    830: 	    $pre=' \hfill \llap{';
                    831: 	}
                    832: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    833: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      834: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  835:     } 
                    836:     return $currentstring;
                    837: }
                    838: 
                    839: sub end_h4 {
1.125     sakharuk  840:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  841:     my $currentstring = '';
                    842:     if ($target eq 'web') {
                    843: 	$currentstring .= $token->[2];
                    844:     } elsif ($target eq 'tex') {
1.212     sakharuk  845: 	my $post='\vskip 0 mm ';
1.125     sakharuk  846: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  847: 	if ($align eq 'center') {
1.125     sakharuk  848: 	    $post='\end{center}';
                    849: 	} elsif ($align eq 'left') {
                    850: 	    $post='} \hfill'.'\vskip 0 mm ';
                    851: 	} elsif ($align eq 'right') {
                    852: 	    $post='}'.'\vskip 0 mm ';
                    853: 	}
                    854: 	$currentstring .= '}}'.$post;
1.122     albertel  855:     } 
                    856:     return $currentstring;
                    857: }
                    858: 
1.35      sakharuk  859: #-- <h5> tag
1.122     albertel  860: sub start_h5 {
1.125     sakharuk  861:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      862:     my $currentstring = &end_p();	# Close off any prior paras.
1.122     albertel  863:     if ($target eq 'web') {
                    864: 	$currentstring .= $token->[4];
                    865:     } elsif ($target eq 'tex') {
1.125     sakharuk  866: 	my $pre;
                    867: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  868: 	if ($align eq 'center') {
1.125     sakharuk  869: 	    $pre='\begin{center}';
                    870: 	} elsif ($align eq 'left') {
                    871: 	    $pre='\rlap{';
                    872: 	} elsif ($align eq 'right') {
                    873: 	    $pre=' \hfill \llap{';
                    874: 	}
                    875: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    876: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      877: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  878:     } 
                    879:     return $currentstring;
                    880: }
                    881: 
                    882: sub end_h5 {
1.125     sakharuk  883:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  884:     my $currentstring = '';
                    885:     if ($target eq 'web') {
                    886: 	$currentstring .= $token->[2];
                    887:     } elsif ($target eq 'tex') {
1.212     sakharuk  888: 	my $post='\vskip 0 mm ';
1.125     sakharuk  889: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  890: 	if ($align eq 'center') {
1.125     sakharuk  891: 	    $post='\end{center}';
                    892: 	} elsif ($align eq 'left') {
                    893: 	    $post='} \hfill'.'\vskip 0 mm ';
                    894: 	} elsif ($align eq 'right') {
                    895: 	    $post='}'.'\vskip 0 mm ';
                    896: 	}
                    897: 	$currentstring .= '}}'.$post;
1.122     albertel  898:     } 
                    899:     return $currentstring;
                    900: }
                    901: 
1.35      sakharuk  902: #-- <h6> tag
1.122     albertel  903: sub start_h6 {
1.125     sakharuk  904:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      905:     my $currentstring = &end_p();	# Close off any prior paras.
1.122     albertel  906:     if ($target eq 'web') {
                    907: 	$currentstring .= $token->[4];
                    908:     } elsif ($target eq 'tex') {
1.125     sakharuk  909: 	my $pre;
                    910: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  911: 	if ($align eq 'center') {
1.125     sakharuk  912: 	    $pre='\begin{center}';
                    913: 	} elsif ($align eq 'left') {
                    914: 	    $pre='\rlap{';
                    915: 	} elsif ($align eq 'right') {
                    916: 	    $pre=' \hfill \llap{';
                    917: 	}
                    918: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    919: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      920: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  921:     } 
                    922:     return $currentstring;
                    923: }
                    924: 
                    925: sub end_h6 {
1.125     sakharuk  926:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  927:     my $currentstring = '';
                    928:     if ($target eq 'web') {
                    929: 	$currentstring .= $token->[2];
                    930:     } elsif ($target eq 'tex') {
1.212     sakharuk  931: 	my $post='\vskip 0 mm ';
1.125     sakharuk  932: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  933: 	if ($align eq 'center') {
1.125     sakharuk  934: 	    $post='\end{center}';
                    935: 	} elsif ($align eq 'left') {
                    936: 	    $post='} \hfill'.'\vskip 0 mm ';
                    937: 	} elsif ($align eq 'right') {
                    938: 	    $post='}'.'\vskip 0 mm ';
                    939: 	}
                    940: 	$currentstring .= '}}'.$post;
1.122     albertel  941:     } 
                    942:     return $currentstring;
                    943: }
                    944: 
1.181     sakharuk  945: #--- <cite> tag (end tag required)
1.122     albertel  946: sub start_cite {
                    947:     my ($target,$token) = @_;
                    948:     my $currentstring = '';
                    949:     if ($target eq 'web') {
                    950: 	$currentstring .= $token->[4];
                    951:     } elsif ($target eq 'tex') {
1.179     sakharuk  952: 	$currentstring .= '\textit{';
1.144     sakharuk  953:     }
1.122     albertel  954:     return $currentstring;
                    955: }
                    956: 
                    957: sub end_cite {
                    958:     my ($target,$token) = @_;
                    959:     my $currentstring = '';
                    960:     if ($target eq 'web') {
                    961: 	$currentstring .= $token->[2];
                    962:     } elsif ($target eq 'tex') {
1.179     sakharuk  963: 	$currentstring .= '}';
1.144     sakharuk  964:     }
1.122     albertel  965:     return $currentstring;
                    966: }
                    967: 
1.181     sakharuk  968: #-- <i> tag (end tag required)
1.122     albertel  969: sub start_i {
                    970:     my ($target,$token) = @_;
                    971:     my $currentstring = '';
                    972:     if ($target eq 'web') {
                    973: 	$currentstring .= $token->[4];
                    974:     } elsif ($target eq 'tex') {
                    975: 	$currentstring .= '\textit{';
1.144     sakharuk  976:     }
1.122     albertel  977:     return $currentstring;
                    978: }
                    979: 
                    980: sub end_i {
                    981:     my ($target,$token) = @_;
                    982:     my $currentstring = '';
                    983:     if ($target eq 'web') {
                    984: 	$currentstring .= $token->[2];
                    985:     } elsif ($target eq 'tex') {
                    986: 	$currentstring .= '}';
                    987:     } 
                    988:     return $currentstring;
                    989: }
                    990: 
1.181     sakharuk  991: #-- <address> tag (end tag required)
1.122     albertel  992: sub start_address {
                    993:     my ($target,$token) = @_;
                    994:     my $currentstring = '';
                    995:     if ($target eq 'web') {
                    996: 	$currentstring .= $token->[4];
                    997:     } elsif ($target eq 'tex') {
1.179     sakharuk  998: 	$currentstring .= '\textit{';
1.144     sakharuk  999:     }
1.122     albertel 1000:     return $currentstring;
                   1001: }
                   1002: 
                   1003: sub end_address {
                   1004:     my ($target,$token) = @_;
                   1005:     my $currentstring = '';
                   1006:     if ($target eq 'web') {
                   1007: 	$currentstring .= $token->[2];
                   1008:     } elsif ($target eq 'tex') {
1.179     sakharuk 1009: 	$currentstring .= '}';
1.122     albertel 1010:     }
                   1011:     return $currentstring;
                   1012: }
                   1013: 
1.181     sakharuk 1014: #-- <dfn> tag (end tag required)
1.122     albertel 1015: sub start_dfn {
                   1016:     my ($target,$token) = @_;
                   1017:     my $currentstring = '';
                   1018:     if ($target eq 'web') {
                   1019: 	$currentstring .= $token->[4];
                   1020:     } elsif ($target eq 'tex') {
1.179     sakharuk 1021: 	$currentstring .= '\textit{';
1.122     albertel 1022:     } 
                   1023:     return $currentstring;
                   1024: }
                   1025: 
                   1026: sub end_dfn {
                   1027:     my ($target,$token) = @_;
                   1028:     my $currentstring = '';
                   1029:     if ($target eq 'web') {
                   1030: 	$currentstring .= $token->[2];
                   1031:     } elsif ($target eq 'tex') {
1.179     sakharuk 1032: 	$currentstring .= '}';
1.144     sakharuk 1033:     }
1.122     albertel 1034:     return $currentstring;
                   1035: }
                   1036: 
1.181     sakharuk 1037: #-- <tt> tag (end tag required)
1.122     albertel 1038: sub start_tt {
                   1039:     my ($target,$token) = @_;
                   1040:     my $currentstring = '';
                   1041:     if ($target eq 'web') {
                   1042: 	$currentstring .= $token->[4];
                   1043:     } elsif ($target eq 'tex') {
                   1044: 	$currentstring .= '\texttt{';
1.144     sakharuk 1045:     }
1.122     albertel 1046:     return $currentstring;
                   1047: }
                   1048: 
                   1049: sub end_tt {
                   1050:     my ($target,$token) = @_;
                   1051:     my $currentstring = '';
                   1052:     if ($target eq 'web') {
                   1053: 	$currentstring .= $token->[2];
                   1054:     } elsif ($target eq 'tex') {
                   1055: 	$currentstring .= '}';
                   1056:     }
                   1057:     return $currentstring;
                   1058: }
                   1059: 
1.181     sakharuk 1060: #-- <kbd> tag (end tag required)
1.122     albertel 1061: sub start_kbd {
                   1062:     my ($target,$token) = @_;
                   1063:     my $currentstring = '';
                   1064:     if ($target eq 'web') {
                   1065: 	$currentstring .= $token->[4];
                   1066:     } elsif ($target eq 'tex') {
1.179     sakharuk 1067: 	$currentstring .= '\texttt{';
1.144     sakharuk 1068:     }
1.122     albertel 1069:     return $currentstring;
                   1070: }
                   1071: 
                   1072: sub end_kbd {
                   1073:     my ($target,$token) = @_;
                   1074:     my $currentstring = '';
                   1075:     if ($target eq 'web') {
                   1076: 	$currentstring .= $token->[2];
                   1077:     } elsif ($target eq 'tex') {
1.179     sakharuk 1078: 	$currentstring .= '}';
1.144     sakharuk 1079:     }
1.122     albertel 1080:     return $currentstring;
                   1081: }
                   1082: 
1.181     sakharuk 1083: #-- <code> tag (end tag required)
1.122     albertel 1084: sub start_code {
                   1085:     my ($target,$token) = @_;
                   1086:     my $currentstring = '';
                   1087:     if ($target eq 'web') {
                   1088: 	$currentstring .= $token->[4];
                   1089:     } elsif ($target eq 'tex') {
                   1090: 	$currentstring .= '\texttt{';
                   1091:     } 
                   1092:     return $currentstring;
                   1093: }
                   1094: 
                   1095: sub end_code {
                   1096:     my ($target,$token) = @_;
                   1097:     my $currentstring = '';
                   1098:     if ($target eq 'web') {
                   1099: 	$currentstring .= $token->[2];
                   1100:     } elsif ($target eq 'tex') {
                   1101: 	$currentstring .= '}';
                   1102:     } 
                   1103:     return $currentstring;
                   1104: }
                   1105: 
1.181     sakharuk 1106: #-- <em> tag (end tag required)
1.122     albertel 1107: sub start_em {
                   1108:     my ($target,$token) = @_;
                   1109:     my $currentstring = '';
                   1110:     if ($target eq 'web') {
                   1111: 	$currentstring .= $token->[4];
                   1112:     } elsif ($target eq 'tex') {
                   1113: 	$currentstring .= '\emph{';
1.144     sakharuk 1114:     }
1.122     albertel 1115:     return $currentstring;
                   1116: }
                   1117: 
                   1118: sub end_em {
                   1119:     my ($target,$token) = @_;
                   1120:     my $currentstring = '';
                   1121:     if ($target eq 'web') {
                   1122: 	$currentstring .= $token->[2];
                   1123:     } elsif ($target eq 'tex') {
                   1124: 	$currentstring .= '}';
1.144     sakharuk 1125:     } 
1.122     albertel 1126:     return $currentstring;
                   1127: }
                   1128: 
1.181     sakharuk 1129: #-- <q> tag (end tag required)
1.122     albertel 1130: sub start_q {
                   1131:     my ($target,$token) = @_;
                   1132:     my $currentstring = '';
                   1133:     if ($target eq 'web') {
                   1134: 	$currentstring .= $token->[4];
                   1135:     } elsif ($target eq 'tex') {
1.179     sakharuk 1136: 	$currentstring .= '\emph{';
1.122     albertel 1137:     }
                   1138:     return $currentstring;
                   1139: }
                   1140: 
                   1141: sub end_q {
                   1142:     my ($target,$token) = @_;
                   1143:     my $currentstring = '';
                   1144:     if ($target eq 'web') {
                   1145: 	$currentstring .= $token->[2];
                   1146:     } elsif ($target eq 'tex') {
1.179     sakharuk 1147: 	$currentstring .= '}';
1.144     sakharuk 1148:     } 
1.122     albertel 1149:     return $currentstring;
                   1150: }
                   1151: 
1.277     foxr     1152: #  <p> is a bit strange since it does not require a closing </p>
                   1153: #  However in latex, we must often output closing stuff to end
                   1154: #  environments and {}'s etc.  Therefore we do all the work
                   1155: #  of figuring out the ending strings in the start tag processing,
                   1156: #  and provide a mechanism to output the stop text external
                   1157: #  to tag processing.
                   1158: #
                   1159: {
                   1160: 
                   1161:     my $closing_string = '';		# String required to close <p>
                   1162: 
1.279     foxr     1163: #   Some tags are <p> fragile meaning that <p> inside of them
                   1164: #   does not work within TeX mode.  This is managed via the 
                   1165: #   counter below:
                   1166: #
                   1167: 
                   1168:     my $para_disabled = 0;
                   1169: 
                   1170: sub disable_para {
                   1171:     $para_disabled++;
                   1172: }
                   1173: sub enable_para {
                   1174:     $para_disabled--;
                   1175: }
                   1176: 
                   1177: 
1.181     sakharuk 1178: #-- <p> tag (end tag optional)
1.198     sakharuk 1179: #optional attribute - align="center|left|right"
1.122     albertel 1180: sub start_p {
1.157     sakharuk 1181:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1182:     my $currentstring = '';
1.122     albertel 1183:     if ($target eq 'web') {
1.279     foxr     1184: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.122     albertel 1185: 	$currentstring .= $token->[4];
1.279     foxr     1186: 	if (! ($currentstring =~ /\//)) {
                   1187: 	    $closing_string = '</p>'; # Deal correctly with <p /> e.g.
                   1188: 	}
                   1189:     } elsif ($target eq 'tex' && !$para_disabled) {
                   1190: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.198     sakharuk 1191: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1192: 	if ($align eq 'center') {
1.277     foxr     1193: 	    $currentstring .='\begin{center}\par';
                   1194: 	    $closing_string = '\end{center}';
1.302.2.1  albertel 1195: 	    if (&is_inside_of($tagstack, "table")) {
                   1196: 		$currentstring = &center_correction().$currentstring;
1.302.2.3! albertel 1197: 		#$closing_string .= &center_correction();
1.302.2.1  albertel 1198: 	    }
1.198     sakharuk 1199: 	} elsif ($align eq 'right') {
1.277     foxr     1200: 	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
                   1201: 	    $closing_string= '}}';
1.198     sakharuk 1202: 	} elsif ($align eq 'left') {
1.277     foxr     1203: 	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
                   1204: 	    $closing_string = '}\hfill}';
1.216     matthew  1205: 	} else {
1.277     foxr     1206:             $currentstring.='\par ';
1.279     foxr     1207: 	    $closing_string = '\strut\\\\\strut ';
1.216     matthew  1208:         }
1.277     foxr     1209: 
1.144     sakharuk 1210:     }
1.122     albertel 1211:     return $currentstring;
                   1212: }
1.277     foxr     1213: #
                   1214: #  End paragraph processing just requires that we output the
                   1215: #  closing string that was saved and blank it.
                   1216: sub end_p {
1.279     foxr     1217:     #  Note only 'tex' mode uses disable_para and enable_para
                   1218:     #  so we don't need to know the target in the check below:
                   1219: 
                   1220:     if (!$para_disabled) {
                   1221: 	my $current_string = $closing_string;
                   1222: 	$closing_string = '';	# Not in a para anymore.
                   1223: 	return $current_string;
                   1224:     } else {
                   1225: 	return '';
                   1226:     }
1.122     albertel 1227: 
                   1228: }
1.277     foxr     1229: }
1.181     sakharuk 1230: #-- <br> tag (end tag forbidden)
1.122     albertel 1231: sub start_br {
                   1232:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1233:     my $currentstring = '';
                   1234:     if ($target eq 'web') {
                   1235: 	$currentstring .= $token->[4];
                   1236:     } elsif ($target eq 'tex') {
1.227     sakharuk 1237: 	my @tempo=@$tagstack;
1.229     sakharuk 1238: 	my $signal=0;
1.287     foxr     1239: 	#  Not going to factor this to is_inside_of since that would require
                   1240:         #  multiple stack traversals.
                   1241: 	#
1.227     sakharuk 1242: 	for (my $i=$#tempo;$i>=0;$i--) {
                   1243: 	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1.230     sakharuk 1244:                 ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
                   1245:                 ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th'))  {
1.229     sakharuk 1246: 		$signal=1;
1.227     sakharuk 1247: 		last;
                   1248: 	    }
                   1249: 	}
1.229     sakharuk 1250: 	if ($signal) {
1.219     sakharuk 1251: 	    $currentstring .= ' \vskip 0 mm ';
                   1252: 	} elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
                   1253: 	    $currentstring .= '\strut \\\\ \strut ';
1.1       sakharuk 1254: 	}
1.144     sakharuk 1255:     }
1.122     albertel 1256:     return $currentstring;
                   1257: }
                   1258: 
                   1259: sub end_br {
                   1260:     my ($target,$token) = @_;
                   1261:     my $currentstring = '';
                   1262:     if ($target eq 'web') {
                   1263: 	$currentstring .= $token->[2];
                   1264:     }
                   1265:     return $currentstring;
                   1266: }
                   1267: 
1.181     sakharuk 1268: #-- <big> tag (end tag required)
1.122     albertel 1269: sub start_big {
                   1270:     my ($target,$token) = @_;
                   1271:     my $currentstring = '';
                   1272:     if ($target eq 'web') {
                   1273: 	$currentstring .= $token->[4];
                   1274:     } elsif ($target eq 'tex') {
1.137     sakharuk 1275: 	$currentstring .= '{\large ';
1.144     sakharuk 1276:     } 
1.122     albertel 1277:     return $currentstring;
                   1278: }
                   1279: 
                   1280: sub end_big {
                   1281:     my ($target,$token) = @_;
                   1282:     my $currentstring = '';
                   1283:     if ($target eq 'web') {
                   1284: 	$currentstring .= $token->[2];
                   1285:     } elsif ($target eq 'tex') {
                   1286: 	$currentstring .= '}';
                   1287:     }
                   1288:     return $currentstring;
                   1289: }
                   1290: 
1.181     sakharuk 1291: #-- <small> tag (end tag required)
1.122     albertel 1292: sub start_small {
                   1293:     my ($target,$token) = @_;
                   1294:     my $currentstring = '';
                   1295:     if ($target eq 'web') {
                   1296: 	$currentstring .= $token->[4];
                   1297:     } elsif ($target eq 'tex') {
                   1298: 	$currentstring .= '{\footnotesize ';
1.144     sakharuk 1299:     }
1.122     albertel 1300:     return $currentstring;
                   1301: }
                   1302: 
                   1303: sub end_small {
                   1304:     my ($target,$token) = @_;
                   1305:     my $currentstring = '';
                   1306:     if ($target eq 'web') {
                   1307: 	$currentstring .= $token->[2];
                   1308:     } elsif ($target eq 'tex') {
                   1309: 	$currentstring .= '}';
                   1310:     }
                   1311:     return $currentstring;
                   1312: }
                   1313: 
1.181     sakharuk 1314: #-- <basefont> tag (end tag forbidden)
1.122     albertel 1315: sub start_basefont {
1.126     sakharuk 1316:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.122     albertel 1317:     my $currentstring = '';
                   1318:     if ($target eq 'web') {
                   1319: 	$currentstring = $token->[4];     
1.126     sakharuk 1320:     } elsif ($target eq 'tex') {
                   1321: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1322: 	if (defined $basesize) {
                   1323: 	    $currentstring = '{\\'.$basesize.' ';
                   1324: 	}
                   1325:     }
1.122     albertel 1326:     return $currentstring;
                   1327: }
                   1328: 
                   1329: sub end_basefont {
1.126     sakharuk 1330:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1331:     my $currentstring = '';
                   1332:     if ($target eq 'web') {
                   1333: 	$currentstring = $token->[4];     
1.126     sakharuk 1334:     } elsif ($target eq 'tex') {
                   1335: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1336: 	if (defined $basesize) {
                   1337: 	    $currentstring = '}';
                   1338: 	}
                   1339:     }
1.122     albertel 1340:     return $currentstring;
                   1341: }
                   1342: 
1.181     sakharuk 1343: #-- <font> tag (end tag required)
1.122     albertel 1344: sub start_font {
                   1345:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1346:     my $currentstring = '';
                   1347:     if ($target eq 'web') {
                   1348: 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1.204     albertel 1349: 	if ($face!~/symbol/i) {
1.267     albertel 1350: 	    if (($env{'browser.fontenhance'} eq 'on') || 
                   1351: 		($env{'browser.blackwhite'} eq 'on')) { return ''; }
1.155     www      1352: 	}
1.122     albertel 1353: 	$currentstring = $token->[4];     
1.126     sakharuk 1354:     }  elsif ($target eq 'tex') {
                   1355: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1356: 	if (defined $fontsize) {
                   1357: 	    $currentstring = '{\\'.$fontsize.' ';
                   1358: 	}
                   1359:     }
1.122     albertel 1360:     return $currentstring;
                   1361: }
                   1362: 
                   1363: sub end_font {
                   1364:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1365:     my $currentstring = '';
                   1366:     if ($target eq 'web') {
                   1367: 	$currentstring = $token->[2];    
1.126     sakharuk 1368:     }  elsif ($target eq 'tex') {
                   1369: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1370: 	if (defined $fontsize) {
                   1371: 	    $currentstring = '}';
                   1372: 	}
                   1373:     }
1.122     albertel 1374:     return $currentstring;
                   1375: }
                   1376:  
1.181     sakharuk 1377: #-- <strike> tag (end tag required)
1.122     albertel 1378: sub start_strike {
                   1379:     my ($target,$token) = @_;
                   1380:     my $currentstring = '';
                   1381:     if ($target eq 'web') {
                   1382: 	$currentstring .= $token->[4];
                   1383:     } elsif ($target eq 'tex') {
                   1384: 	&Apache::lonxml::startredirection();
                   1385:     } 
                   1386:     return $currentstring;
                   1387: }
                   1388: 
                   1389: sub end_strike {
                   1390:     my ($target,$token) = @_;
                   1391:     my $currentstring = '';
                   1392:     if ($target eq 'web') {
                   1393: 	$currentstring .= $token->[2];
                   1394:     } elsif ($target eq 'tex') {
                   1395: 	$currentstring=&Apache::lonxml::endredirection();
                   1396: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 
                   1397: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/; 
                   1398: 	$currentstring=~s/(\S)\s*$/$1\}/;
                   1399:     }
                   1400:     return $currentstring;
                   1401: }
                   1402: 
1.181     sakharuk 1403: #-- <s> tag (end tag required)
1.122     albertel 1404: sub start_s {
                   1405:     my ($target,$token) = @_;
                   1406:     my $currentstring = '';
                   1407:     if ($target eq 'web') {
                   1408: 	$currentstring .= $token->[4];
                   1409:     } elsif ($target eq 'tex') {
                   1410: 	&Apache::lonxml::startredirection();
                   1411:     } 
                   1412:     return $currentstring;
                   1413: }
                   1414: 
                   1415: sub end_s {
                   1416:     my ($target,$token) = @_;
                   1417:     my $currentstring = '';
                   1418:     if ($target eq 'web') {
                   1419: 	$currentstring .= $token->[2];
                   1420:     } elsif ($target eq 'tex') {
                   1421: 	$currentstring=&Apache::lonxml::endredirection();
                   1422: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1423: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1424: 	$currentstring=~s/(\S)\s*$/$1\}/;	
                   1425:     }
                   1426:     return $currentstring;
                   1427: }
                   1428: 
1.181     sakharuk 1429: #-- <sub> tag (end tag required)
1.122     albertel 1430: sub start_sub {
                   1431:     my ($target,$token) = @_;
                   1432:     my $currentstring = '';
                   1433:     if ($target eq 'web') {
                   1434: 	$currentstring .= $token->[4];
                   1435:     } elsif ($target eq 'tex') {
1.202     sakharuk 1436: 	$currentstring .= '\ensuremath{_{';
1.122     albertel 1437:     } 
                   1438:     return $currentstring;
                   1439: }
                   1440: 
                   1441: sub end_sub {
                   1442:     my ($target,$token) = @_;
                   1443:     my $currentstring = '';
                   1444:     if ($target eq 'web') {
                   1445: 	$currentstring .= $token->[2];
                   1446:     } elsif ($target eq 'tex') {
1.202     sakharuk 1447: 	$currentstring .= '}}';
1.122     albertel 1448:     }
                   1449:     return $currentstring;
                   1450: }
                   1451: 
1.181     sakharuk 1452: #-- <sup> tag (end tag required)
1.122     albertel 1453: sub start_sup {
                   1454:     my ($target,$token) = @_;
                   1455:     my $currentstring = '';
                   1456:     if ($target eq 'web') {
                   1457: 	$currentstring .= $token->[4];
                   1458:     } elsif ($target eq 'tex') {
1.202     sakharuk 1459: 	$currentstring .= '\ensuremath{^{';
1.122     albertel 1460:     } 
                   1461:     return $currentstring;
                   1462: }
                   1463: 
                   1464: sub end_sup {
                   1465:     my ($target,$token) = @_;
                   1466:     my $currentstring = '';
                   1467:     if ($target eq 'web') {
                   1468: 	$currentstring .= $token->[2];
                   1469:     } elsif ($target eq 'tex') {
1.202     sakharuk 1470: 	$currentstring .= '}}';
1.122     albertel 1471:     }
                   1472:     return $currentstring;
                   1473: }
                   1474: 
1.181     sakharuk 1475: #-- <hr> tag (end tag forbidden)
1.122     albertel 1476: sub start_hr {
1.124     sakharuk 1477:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1478:     my $currentstring = &end_p();	# End enclosing para.
1.122     albertel 1479:     if ($target eq 'web') {
                   1480: 	$currentstring .= $token->[4];
                   1481:     } elsif ($target eq 'tex') {
1.149     sakharuk 1482: 	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.124     sakharuk 1483: 	if (defined $LaTeXwidth) {
                   1484: 	    if ($LaTeXwidth=~/^%/) {
                   1485: 		substr($LaTeXwidth,0,1)='';
                   1486: 		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
                   1487: 	    }
                   1488: 	} else {
1.148     sakharuk 1489: 	    $LaTeXwidth ='0.9\textwidth';
1.124     sakharuk 1490: 	}
                   1491: 	my ($pre,$post);
                   1492: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1493: 	if (($align eq 'center') || (not defined $align)) {
                   1494: 	    $pre=''; $post='';
                   1495: 	} elsif ($align eq 'left') {
                   1496: 	    $pre='\rlap{'; $post='} \hfill';
                   1497: 	} elsif ($align eq 'right') {
                   1498: 	    $pre=' \hfill \llap{'; $post='}';
                   1499: 	}
1.148     sakharuk 1500: 	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1.124     sakharuk 1501:                                     $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1.122     albertel 1502:     } 
                   1503:     return $currentstring;
                   1504: }
                   1505: 
                   1506: sub end_hr {
                   1507:     my ($target,$token) = @_;
                   1508:     my $currentstring = '';
                   1509:     if ($target eq 'web') {
                   1510: 	$currentstring .= $token->[2];
1.148     sakharuk 1511:     }
1.122     albertel 1512:     return $currentstring;
                   1513: }
                   1514: 
1.181     sakharuk 1515: #-- <div> tag (end tag required)
1.280     foxr     1516: {
                   1517: 
                   1518: #  Since div can be nested, the stack below is used
                   1519: #  in 'tex' mode to store the ending strings
                   1520: #  for the div stack.
                   1521: 
                   1522:     my @div_end_stack;
                   1523: 
1.122     albertel 1524: sub start_div {
1.280     foxr     1525:     my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1.279     foxr     1526:     my $currentstring = &end_p();	# Close enclosing para.
1.122     albertel 1527:     if ($target eq 'web') {
                   1528: 	$currentstring .= $token->[4];
                   1529:     } 
1.280     foxr     1530:     if ($target eq 'tex') {
                   1531: 	# 4 possible alignments: left, right, center, and -missing-.
                   1532: 
                   1533: 	my $endstring = '';
                   1534: 
                   1535: 	my $align = lc(&Apache::lonxml::get_param('align', $parstack,
                   1536: 						  $safeeval, undef, 1));
                   1537: 	if ($align eq 'center') {
                   1538: 	    $currentstring .= '\begin{center}';
                   1539: 	    $endstring      = '\end{center}';
1.302.2.1  albertel 1540: 	    if (&is_inside_of($tagstack, "table")) {
                   1541: 		$currentstring = &center_correction().$currentstring;
1.302.2.3! albertel 1542: 		#$endstring .= &center_correction();
1.302.2.1  albertel 1543: 	    }
1.280     foxr     1544: 	}
                   1545: 	elsif ($align eq 'right') {
                   1546: 	    $currentstring .= '\begin{flushright}';
                   1547: 	    $endstring     .= '\end{flushright}';
                   1548: 	} elsif ($align eq 'left') {
                   1549: 	    $currentstring .= '\begin{flushleft}';
                   1550: 	    $endstring     = '\end{flushleft}';
                   1551: 	} else {
                   1552: 	
                   1553: 	}
                   1554: 	$currentstring .= "\n";   # For human readability.
                   1555: 	$endstring       = "\n$endstring\n"; # For human readability
                   1556: 	push(@div_end_stack, $endstring);
                   1557:     }
1.122     albertel 1558:     return $currentstring;
                   1559: }
                   1560: 
                   1561: sub end_div {
                   1562:     my ($target,$token) = @_;
                   1563:     my $currentstring = '';
                   1564:     if ($target eq 'web') {
                   1565: 	$currentstring .= $token->[2];
1.280     foxr     1566:     }
                   1567:     if ($target eq 'tex') {
                   1568: 	my $endstring = pop @div_end_stack;
                   1569: 	$currentstring .= $endstring;
                   1570:     }
1.122     albertel 1571:     return $currentstring;
                   1572: }
1.280     foxr     1573: }
1.122     albertel 1574: 
1.181     sakharuk 1575: #-- <a> tag (end tag required)
1.122     albertel 1576: sub start_a {
1.149     sakharuk 1577:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1578:     my $currentstring = '';
                   1579:     if ($target eq 'web') {
1.250     albertel 1580: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   1581: 					    undef,1);
                   1582: 	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1.122     albertel 1583:     } elsif ($target eq 'tex') {
1.149     sakharuk 1584: 	my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1.161     sakharuk 1585: 	my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
                   1586: 	if ($a=~/\S/) {
                   1587: 	    $a=~s/([^\\])%/$1\\\%/g;
                   1588: 	    $currentstring .= '\ref{URI: '.$a.'}';
                   1589: 	} elsif ($b=~/\S/) {
                   1590: 	    $currentstring .= '\ref{Anchor: '.$b.'}';
                   1591: 	} else {
                   1592: 	    $currentstring.='';
                   1593: 	}
1.122     albertel 1594:     }
                   1595:     return $currentstring;
                   1596: }
                   1597: 
                   1598: sub end_a {
1.168     albertel 1599:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1600:     my $currentstring = '';
                   1601:     if ($target eq 'web') {
                   1602: 	$currentstring .= $token->[2];
                   1603:     }
                   1604:     return $currentstring;
                   1605: }
                   1606: 
1.181     sakharuk 1607: #-- <li> tag (end tag optional)
1.122     albertel 1608: sub start_li {
1.168     albertel 1609:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1610:     my $currentstring = '';
                   1611:     if ($target eq 'web') {
                   1612: 	$currentstring = $token->[4];     
                   1613:     } elsif ($target eq 'tex') {
1.237     sakharuk 1614: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1615: 	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1.238     albertel 1616: 	#FIXME need to support types i and I 
                   1617: 	if ($type=~/disc/) {
                   1618: 	    $currentstring .= ' \item[$\bullet$] ';
                   1619: 	} elsif ($type=~/circle/) {
                   1620: 	    $currentstring .= ' \item[$\circ$] ';
1.146     sakharuk 1621: 	} elsif ($type=~/square/) {
1.238     albertel 1622: 	    $currentstring .= ' \item[$\diamond$] ';
                   1623: 	} elsif ($type eq '1') {
                   1624: 	    $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1.237     sakharuk 1625: 	} elsif ($type eq 'A') {
1.238     albertel 1626: 	    $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1627: 	} elsif ($type eq 'a') {
1.238     albertel 1628: 	    $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1629: 	} elsif ($value ne '') {
                   1630: 	    $currentstring .= ' \item['.$value.'] ';
1.122     albertel 1631: 	} else {
1.146     sakharuk 1632: 	    $currentstring .= ' \item ';
1.122     albertel 1633: 	}  
1.238     albertel 1634: 	$Apache::londefdef::list_index++;
                   1635:     }
1.122     albertel 1636:     return $currentstring;
                   1637: }
                   1638: 
                   1639: sub end_li {
                   1640:     my ($target,$token) = @_;
1.279     foxr     1641:     my $currentstring = &end_p();	# In case there's a <p> in the <li>
1.122     albertel 1642:     if ($target eq 'web') {
1.277     foxr     1643: 	$currentstring .= $token->[2];     
1.122     albertel 1644:     } 
                   1645:     return $currentstring;
                   1646: }
                   1647: 
1.181     sakharuk 1648: #-- <u> tag (end tag required)
1.122     albertel 1649: sub start_u {
                   1650:     my ($target,$token) = @_;
                   1651:     my $currentstring = '';
                   1652:     if ($target eq 'web') {
                   1653: 	$currentstring .= $token->[4];
                   1654:     } elsif ($target eq 'tex') {
                   1655: 	&Apache::lonxml::startredirection();
                   1656:     } 
                   1657:     return $currentstring;
                   1658: }
                   1659: 
                   1660: sub end_u {
                   1661:     my ($target,$token) = @_;
                   1662:     my $currentstring = '';
                   1663:     if ($target eq 'web') {
                   1664: 	$currentstring .= $token->[2];
                   1665:     } elsif ($target eq 'tex') {
                   1666: 	$currentstring=&Apache::lonxml::endredirection();
                   1667: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1668: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1669: 	$currentstring=~s/(\S)\s*$/$1\}/;		
                   1670:     }
                   1671:     return $currentstring;
                   1672: }
                   1673: 
1.181     sakharuk 1674: #-- <ul> tag (end tag required)
1.122     albertel 1675: sub start_ul {
1.125     sakharuk 1676:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1677:     my $currentstring = &end_p();	# Close off enclosing list.
1.122     albertel 1678:     if ($target eq 'web') {
1.277     foxr     1679: 	$currentstring .= $token->[4];     
1.122     albertel 1680:     } elsif ($target eq 'tex') {
1.125     sakharuk 1681: 	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1.238     albertel 1682: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1683: 	if ($TeXtype eq 'disc') {
1.222     sakharuk 1684: 	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                   1685:                               '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1686:                               '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1687:                               '\renewcommand{\labelitemiv}{$\bullet$}';
1.125     sakharuk 1688: 	} elsif ($TeXtype eq 'circle') {
1.222     sakharuk 1689: 	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                   1690:                               '\renewcommand{\labelitemii}{$\circ$}'. 
                   1691:                               '\renewcommand{\labelitemiii}{$\circ$}'.
                   1692:                               '\renewcommand{\labelitemiv}{$\circ$}';
1.125     sakharuk 1693: 	} elsif ($TeXtype eq 'square') {
1.222     sakharuk 1694: 	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                   1695:                               '\renewcommand{\labelitemii}{$\diamond$}'. 
                   1696:                               '\renewcommand{\labelitemiii}{$\diamond$}'.
                   1697:                               '\renewcommand{\labelitemiv}{$\diamond$}';
1.125     sakharuk 1698: 	}
1.222     sakharuk 1699: 	$currentstring .= '\strut \begin{itemize}';  
1.122     albertel 1700:     } 
                   1701:     return $currentstring;
                   1702: }
                   1703: 
                   1704: sub end_ul {
                   1705:     my ($target,$token) = @_;
                   1706:     my $currentstring = '';
                   1707:     if ($target eq 'web') {
                   1708: 	$currentstring = $token->[2];     
                   1709:     } elsif ($target eq 'tex') {
1.222     sakharuk 1710: 	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                   1711:                                '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1712:                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1713:                                '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
1.122     albertel 1714:     } 
                   1715:     return $currentstring;
                   1716: }
                   1717: 
1.181     sakharuk 1718: #-- <menu> tag (end tag required)
1.122     albertel 1719: sub start_menu {
                   1720:     my ($target,$token) = @_;
                   1721:     my $currentstring = '';
                   1722:     if ($target eq 'web') {
                   1723: 	$currentstring = $token->[4];     
                   1724:     } elsif ($target eq 'tex') {
                   1725: 	$currentstring = " \\begin{itemize} ";  
                   1726:     } 
                   1727:     return $currentstring;
                   1728: }
                   1729: 
                   1730: sub end_menu {
                   1731:     my ($target,$token) = @_;
                   1732:     my $currentstring = '';
                   1733:     if ($target eq 'web') {
                   1734: 	$currentstring = $token->[2];     
                   1735:     } elsif ($target eq 'tex') {
                   1736: 	$currentstring = " \\end{itemize}";  
                   1737:     } 
                   1738:     return $currentstring;
                   1739: }
                   1740: 
1.181     sakharuk 1741: #-- <dir> tag (end tag required)
1.122     albertel 1742: sub start_dir {
                   1743:     my ($target,$token) = @_;
1.279     foxr     1744:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.122     albertel 1745:     if ($target eq 'web') {
1.277     foxr     1746: 	$currentstring .= $token->[4];     
1.122     albertel 1747:     } elsif ($target eq 'tex') {
1.277     foxr     1748: 	$currentstring .= " \\begin{itemize} ";  
1.122     albertel 1749:     } 
                   1750:     return $currentstring;
                   1751: }
                   1752: 
                   1753: sub end_dir {
                   1754:     my ($target,$token) = @_;
                   1755:     my $currentstring = '';
                   1756:     if ($target eq 'web') {
                   1757: 	$currentstring = $token->[2];     
                   1758:     } elsif ($target eq 'tex') {
                   1759: 	$currentstring = " \\end{itemize}";  
                   1760:     } 
                   1761:     return $currentstring;
                   1762: }
                   1763: 
1.181     sakharuk 1764: #-- <ol> tag (end tag required)
1.122     albertel 1765: sub start_ol {
1.125     sakharuk 1766:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1767:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.122     albertel 1768:     if ($target eq 'web') {
1.277     foxr     1769: 	$currentstring .= $token->[4];     
1.122     albertel 1770:     } elsif ($target eq 'tex') {
1.238     albertel 1771: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1772: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1773: 	if ($type eq '1') {
1.222     sakharuk 1774: 	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1775:                               '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                   1776:                               '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1777:                               '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1.125     sakharuk 1778: 	} elsif ($type eq 'A') {
1.222     sakharuk 1779: 	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                   1780:                               '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                   1781:                               '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                   1782:                               '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1.125     sakharuk 1783: 	} elsif ($type eq 'a') {
1.222     sakharuk 1784: 	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                   1785:                               '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                   1786:                               '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                   1787:                               '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1.125     sakharuk 1788: 	} elsif ($type eq 'i') {
1.222     sakharuk 1789: 	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                   1790:                               '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                   1791:                               '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                   1792:                               '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1.125     sakharuk 1793: 	} elsif ($type eq 'I') {
1.222     sakharuk 1794: 	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                   1795:                               '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                   1796:                               '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                   1797:                               '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1.125     sakharuk 1798: 	}
1.222     sakharuk 1799: 	$currentstring .= '\strut \begin{enumerate}';  
1.122     albertel 1800:     } 
                   1801:     return $currentstring;
                   1802: }
                   1803: 
                   1804: sub end_ol {
                   1805:     my ($target,$token) = @_;
                   1806:     my $currentstring = '';
                   1807:     if ($target eq 'web') {
                   1808: 	$currentstring = $token->[2];     
                   1809:     } elsif ($target eq 'tex') {
1.222     sakharuk 1810: 	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1811:                                         '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                   1812:                                         '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1813:                                         '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
1.122     albertel 1814:     } 
                   1815:     return $currentstring;
                   1816: }
                   1817: 
1.181     sakharuk 1818: #-- <dl> tag (end tag required)
1.122     albertel 1819: sub start_dl {
                   1820:     my ($target,$token) = @_;
1.279     foxr     1821:     my $currentstring = &end_p();	# In case there's a <p> unclosed prior to the list.
1.122     albertel 1822:     if ($target eq 'web') {
1.277     foxr     1823: 	$currentstring .= $token->[4];     
1.122     albertel 1824:     } elsif ($target eq 'tex') {
1.277     foxr     1825: 	$currentstring .= '\begin{description}';
1.243     albertel 1826: 	$Apache::londefdef::DL++;
                   1827: 	push(@Apache::londefdef::description,[]);
                   1828: 	$Apache::londefdef::DD[$Apache::londefdef::DL]=0;
                   1829: 	$Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1.244     albertel 1830: 	$Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1.122     albertel 1831:     } 
                   1832:     return $currentstring;
                   1833: }
                   1834: 
                   1835: sub end_dl {
1.174     sakharuk 1836:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1837:     my $currentstring = '';
                   1838:     if ($target eq 'web') {
                   1839: 	$currentstring = $token->[2];     
                   1840:     } elsif ($target eq 'tex') {
1.243     albertel 1841: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1842: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
                   1843: 	foreach my $element (@{$Apache::londefdef::description[-1]}) {
1.174     sakharuk 1844: 	    $currentstring.=' '.$element.' ';
                   1845: 	}
1.243     albertel 1846: 	pop(@Apache::londefdef::description);
1.174     sakharuk 1847: 	$currentstring.='\end{description}';  
1.243     albertel 1848: 	delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
                   1849: 	delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1.244     albertel 1850: 	delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1.243     albertel 1851: 	$Apache::londefdef::DL--;
1.122     albertel 1852:     } 
                   1853:     return $currentstring;
                   1854: }
                   1855: 
1.172     sakharuk 1856: #-- <dt> tag (end tag optional)
1.122     albertel 1857: sub start_dt {
1.172     sakharuk 1858:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1859:     my $currentstring='';
1.122     albertel 1860:     if ($target eq 'web') {
                   1861: 	$currentstring = $token->[4];     
                   1862:     } elsif ($target eq 'tex') {
1.243     albertel 1863: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1864: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1.174     sakharuk 1865: 	&Apache::lonxml::startredirection();
1.243     albertel 1866: 	$Apache::londefdef::DT[-1]++;
1.244     albertel 1867: 	$Apache::londefdef::seenDT[-1]=1;
1.122     albertel 1868:     } 
                   1869:     return $currentstring;
                   1870: }
                   1871: 
                   1872: sub end_dt {
1.172     sakharuk 1873:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1874:     my $currentstring = '';
                   1875:     if ($target eq 'web') {
                   1876: 	$currentstring = $token->[2];    
                   1877:     } elsif ($target eq 'tex') {
1.243     albertel 1878: 	if ($Apache::londefdef::DT[-1]) {
                   1879: 	    my $data=&item_cleanup();
1.244     albertel 1880: 	    push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1.243     albertel 1881: 	    $Apache::londefdef::DT[-1]--;
                   1882: 	}
1.122     albertel 1883:     } 
                   1884:     return $currentstring;
                   1885: }
                   1886: 
1.173     sakharuk 1887: sub item_cleanup {
1.174     sakharuk 1888:     my $item=&Apache::lonxml::endredirection();
1.173     sakharuk 1889:     $item=~s/\\begin{center}//g;
                   1890:     $item=~s/\\end{center}//g;
                   1891:     return $item;
                   1892: }
                   1893: 
1.181     sakharuk 1894: #-- <dd> tag (end tag optional)
1.122     albertel 1895: sub start_dd {
1.147     sakharuk 1896:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1897:     my $currentstring = '';
                   1898:     if ($target eq 'web') {
                   1899: 	$currentstring = $token->[4];     
1.147     sakharuk 1900:     } elsif ($target eq 'tex') {
1.243     albertel 1901: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1902: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1.244     albertel 1903: 	if (!$Apache::londefdef::seenDT[-1]) {
                   1904: 	    push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
                   1905: 	}
1.243     albertel 1906: 	push(@{$Apache::londefdef::description[-1]},'');
                   1907: 	$Apache::londefdef::description[-1]->[-1].=' \strut ';
                   1908: 	$Apache::londefdef::DD[-1]++;
1.174     sakharuk 1909: 	&Apache::lonxml::startredirection();
1.122     albertel 1910:     } 
                   1911:     return $currentstring;
                   1912: }
                   1913: 
                   1914: sub end_dd {
1.174     sakharuk 1915:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1916:     my $currentstring = '';
                   1917:     if ($target eq 'web') {
                   1918: 	$currentstring = $token->[2];    
1.174     sakharuk 1919:     }  elsif ($target eq 'tex') {
1.243     albertel 1920: 	$Apache::londefdef::description[-1]->[-1].=
                   1921: 	    &Apache::lonxml::endredirection().' \vskip 0mm ';
                   1922: 	$Apache::londefdef::DD[-1]--;
1.174     sakharuk 1923:     }
1.122     albertel 1924:     return $currentstring;
                   1925: }
                   1926: 
1.181     sakharuk 1927: #-- <table> tag (end tag required)
1.277     foxr     1928: #       <table> also ends any prior <p> that is not closed.
                   1929: #               but, unless I allow <p>'s to nest, that's the
                   1930: #               only way I could think of to allow <p> in 
                   1931: #               <tr> <th> bodies
                   1932: #
1.206     sakharuk 1933: #list of supported attributes: border,width,TeXwidth
1.91      sakharuk 1934: sub start_table {
                   1935:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.277     foxr     1936:     my $textwidth = '';
1.279     foxr     1937:     my $currentstring = &end_p();
1.91      sakharuk 1938:     if ($target eq 'web') {
1.277     foxr     1939: 	$currentstring .= $token->[4];     
1.91      sakharuk 1940:     } elsif ($target eq 'tex') {
                   1941: 	my $aa = {};
                   1942: 	push @Apache::londefdef::table, $aa; 
                   1943: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 1944:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 1945: 	if ($#Apache::londefdef::table==0) {
1.267     albertel 1946: 	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1.206     sakharuk 1947: 	    $textwidth=~/(\d+\.?\d*)/;
                   1948: 	    $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
                   1949: 	} else {
                   1950: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   1951: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   1952: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   1953: 	    } else {
                   1954:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 1955: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 1956: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   1957: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   1958: 		}
                   1959: 	    }
                   1960: 	}
1.294     foxr     1961: 
                   1962: 	# width either comes forced from the TeXwidth or the width parameters.
                   1963: 	# in either case it can be a percentage or absolute width.
1.302.2.2  albertel 1964: 	# in the width case we ignore absolute width 
1.126     sakharuk 1965: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.302.2.1  albertel 1966: 	if (!defined($TeXwidth)) {
1.302.2.2  albertel 1967: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
                   1968: 						       $safeeval,undef,1);
                   1969: 	    if ($htmlwidth =~ /%/) {
                   1970: 		$TeXwidth = $htmlwidth;
                   1971: 	    } else { 
                   1972: 		$TeXwidth = $textwidth;
                   1973: 	    }
1.294     foxr     1974: 	} else {
                   1975: 	    $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
                   1976: 	}
                   1977: 	if ($TeXwidth=~/%/) {
1.203     sakharuk 1978: 	    $Apache::londefdef::table[-1]{'percent'}=1;
1.126     sakharuk 1979: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 1980:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 1981: 	} else {
1.206     sakharuk 1982: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.126     sakharuk 1983: 	}        
1.294     foxr     1984: 
1.126     sakharuk 1985:         #table's border
1.206     sakharuk 1986: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 1987:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 1988: 	unless (defined $border) { $border = 0; }
                   1989: 	if ($border) { 
                   1990: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   1991: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   1992: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   1993: 	} else {
                   1994: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   1995: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   1996: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   1997: 	}
1.206     sakharuk 1998: 	if ($#Apache::londefdef::table==0) {
1.281     foxr     1999: 	    #    Note that \newline seems to destroy the alignment envs.
                   2000: 	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
                   2001: 	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 2002: 	}
                   2003: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   2004:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   2005:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 2006:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 2007:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   2008:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   2009:         $Apache::londefdef::table[-1]{'content'}=[];
                   2010:         $Apache::londefdef::table[-1]{'align'}=[];
1.277     foxr     2011:         $currentstring.='\keephidden{NEW TABLE ENTRY}';
1.295     foxr     2012: 
1.294     foxr     2013: 
                   2014:     }
1.91      sakharuk 2015:     return $currentstring;
                   2016: }
1.122     albertel 2017:  
                   2018: sub end_table {
                   2019:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2020:     my $currentstring = '';
                   2021:     if ($target eq 'web') {
                   2022: 	$currentstring = $token->[2];     
                   2023:     } elsif ($target eq 'tex') {
                   2024: 	my $inmemory = '';
                   2025: 	my $output = '';
1.206     sakharuk 2026: 	my $WARNING='';
                   2027:         #width of columns from TeXwidth attributes
1.294     foxr     2028: 
1.206     sakharuk 2029: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2030: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2031: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   2032: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   2033: 		}	
                   2034: 	    }
                   2035: 	}
                   2036:         #free space and number of empty columns
                   2037: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 2038: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 2039: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2040: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   2041: 		$empty_columns++;
                   2042: 	    } else {
                   2043: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   2044: 	    }
                   2045: 	}
                   2046:         #boundaries for contents columns
                   2047: 	my @min_len=();#columns can not be narrower 
                   2048: 	my @max_len=();#maximum length of column
                   2049: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2050: 		my ($localmin,$localmax)=(0,0);
                   2051: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2052: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   2053: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   2054: 		    }
                   2055: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   2056: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   2057: 		    }
                   2058: 		}
                   2059: 		push @min_len, $localmin;
                   2060: 		push @max_len, $localmax;
1.122     albertel 2061: 	}
1.206     sakharuk 2062: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2063: 	    my $localmin=0,;
                   2064: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2065: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   2066: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   2067: 		}
                   2068: 	    }
1.229     sakharuk 2069: 	    if ($max_len[$jn]<$localmin) {
                   2070: 		$max_len[$jn]=$localmin;
                   2071: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2072: 	    }#object size is bigger
                   2073: 	    if ($min_len[$jn]<$localmin) {
                   2074: 		$min_len[$jn]=$localmin;
                   2075: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2076: 	    }#object size is bigger
1.206     sakharuk 2077: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   2078: 		$min_len[$jn]=0;
                   2079: 		$max_len[$jn]=0;
                   2080: 	    }
                   2081: 	}
                   2082:        #final adjustment of column width
                   2083: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   2084: 	my @adjust=();
                   2085:         #step 1. adjustment by maximum value
                   2086: 	my $space_neeeded=0;
                   2087: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2088: 	    $space_neeeded=$space_neeeded+$max_len[$jn];
                   2089: 	}
                   2090: 	if ($space_neeeded<=$available_space) {
                   2091: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2092: 		if ($fwidth[$jn]==0) {
                   2093: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 2094: 		}
1.51      sakharuk 2095: 	    }
1.206     sakharuk 2096: 	} else {
                   2097:         #step 2. adjustment by minimum value (estimation)
                   2098: 	    $space_neeeded=0;
                   2099: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2100: 		$space_neeeded+=$min_len[$jn];
                   2101: 	    }
                   2102: 	    if ($space_neeeded>$available_space) {
                   2103: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   2104: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2105: 		    if ($fwidth[$jn]==0) {
                   2106: 			$fwidth[$jn]=$min_len[$jn];
                   2107: 		    }
                   2108: 		}
1.229     sakharuk 2109: 		#check if we have objects which can be scaled
                   2110: 		my $how_many_to_scale=0;
                   2111: 		my @to_scale=();
                   2112: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2113: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   2114: 			$how_many_to_scale++;
                   2115: 			push @to_scale, $jn;
                   2116: 		    }
                   2117: 		}
                   2118: 		if ($how_many_to_scale>0) {
                   2119: 		    my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
                   2120: 		    foreach my $jn (@to_scale) {
                   2121: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2122: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   2123: 			    if ($1 ne '') {
                   2124: 				my $current_length=&recalc($1);
                   2125: 				$current_length=~/(\d+\.?\d*)/;
                   2126: 				$current_length=$current_length-$space_to_adjust;
                   2127: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   2128: 			    }
                   2129: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   2130: 			    if ($1 ne '') {
                   2131: 				my $current_length=$1;
                   2132: 				$current_length=$current_length-$space_to_adjust;
                   2133: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   2134: 			    }				
                   2135: 			}
                   2136: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   2137: 		    }
                   2138: 		}
1.206     sakharuk 2139: 	    } else {
                   2140: 	      #step 3. adjustment over minimal + corrections
                   2141: 		my $enlarge_coef=$available_space/$space_neeeded;
                   2142: 		my $acsessive=0;
                   2143: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2144: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2145: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2146: 			$fwidth[$jn]=$max_len[$jn];
                   2147: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2148: 			$adjust[$jn]=0;
                   2149: 		    }
                   2150: 		}
                   2151: 		if ($acsessive>0) {
                   2152: 		#we have an excess of space and can redistribute it
                   2153: 		    my $notempty_columns=0;
                   2154: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2155: 			if ($adjust[$jn]!=0) {
                   2156: 			    $notempty_columns++;
                   2157: 			}
                   2158: 		    }
                   2159: 		    my $per_column=$acsessive/$notempty_columns;
                   2160: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2161: 			if ($adjust[$jn]!=0) {
                   2162: 			    $adjust[$jn]+=$per_column;
                   2163: 			    $fwidth[$jn]=$adjust[$jn];
                   2164: 			}
1.223     sakharuk 2165: 		    }
                   2166: 		} else {
                   2167: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2168: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2169: 		    }
                   2170: 		}
1.203     sakharuk 2171: 	    }
                   2172: 	}
1.222     sakharuk 2173:         #use all available width if it is defined in % or as TeXwidth
                   2174:         if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
1.203     sakharuk 2175: 	    my $current=0; 
1.206     sakharuk 2176: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2177: 		$current+=$fwidth[$i];
1.203     sakharuk 2178: 	    }
                   2179: 	    my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
1.206     sakharuk 2180: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2181: 		$fwidth[$i]*=$coef;
                   2182: 	    }
                   2183: 	}
                   2184:         #removing of empty columns if allowed
1.208     sakharuk 2185:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2186: 	if ($permission eq 'yes') {
                   2187: 	    my @cleaned_table=();
                   2188:             my @cleaned_header=();
                   2189: 	    my $colind=0;
                   2190: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2191: 		if ($fwidth[$jn]!=0) {
                   2192: 		    #we need to copy column
                   2193: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2194: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2195: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2196: 		    }
                   2197: 		    $colind++;
                   2198: 		}
1.122     albertel 2199: 	    }
1.206     sakharuk 2200: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2201: 	    @fwidth=@cleaned_header;
1.122     albertel 2202: 	}
1.206     sakharuk 2203: 	#construct header of the table
                   2204: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2205: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2206: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2207: 	}
                   2208: 	$header_of_table .= '}';
1.126     sakharuk 2209: 	#fill the table
                   2210: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.206     sakharuk 2211: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
                   2212: 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.302.2.1  albertel 2213: 		    $output.=&center_correction().'\begin{center}';
1.206     sakharuk 2214: 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2215: 		    $output.=' \hfill \llap{'
                   2216: 		}
                   2217: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2218: 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.302.2.3! albertel 2219: 		    $output.='\end{center}';#.&center_correction();
1.206     sakharuk 2220: 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2221: 		    $output.='} ';
                   2222: 		}
                   2223:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2224: 	    }
                   2225: 	    $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
1.122     albertel 2226: 	}
1.281     foxr     2227: 	# Note that \newline destroys alignment env's produced  by e.g. <div>
                   2228: 	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
                   2229: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
1.127     sakharuk 2230: 	if ($#Apache::londefdef::table > 0) {	    
                   2231: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
1.294     foxr     2232: 	    # Figure out max/and min width  by summing us and then
                   2233: 	    # apply that to the current column of the table we nest in
                   2234: 	    # if it's larger than the current width or the current width
                   2235: 	    # is undefined.
                   2236: 	    #
                   2237: 	    my $min_nested_width = 0;
                   2238: 	    my $max_nested_width = 0;
                   2239: 	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
                   2240: 		$min_nested_width +=  $min_len[$col];
                   2241: 		$max_nested_width +=  $max_len[$col];
1.300     foxr     2242: 		
1.294     foxr     2243: 	    }
                   2244: 	    # Fudge in an extra 5 mm for borders etc:
                   2245: 	    
                   2246: 	    $min_nested_width += 5;
                   2247: 	    $max_nested_width += 5;
                   2248: 
                   2249: 	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
                   2250: 	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
                   2251: 	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
                   2252: 		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
                   2253: 	    }
                   2254: 	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
                   2255: 		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
                   2256: 	    }
                   2257: 
1.127     sakharuk 2258: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2259: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2260: 	} else {
                   2261: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2262: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2263: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2264: 	}
1.122     albertel 2265:     }
                   2266:     return $currentstring;
                   2267: }
                   2268: 
1.166     sakharuk 2269: #-- <tr> tag (end tag optional)
1.122     albertel 2270: sub start_tr {
                   2271:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2272:     my $currentstring = '';
                   2273:     if ($target eq 'web') {
                   2274: 	$currentstring = $token->[4];     
                   2275:     } elsif ($target eq 'tex') {
                   2276: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2277: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2278: 	if ($alignchar ne '') {
1.206     sakharuk 2279: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2280: 	} else {
                   2281: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2282: 	}
                   2283: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
1.300     foxr     2284: 	#
                   2285: 	#  Need to save the number of table columns to preserve the max # columns.
                   2286: 	#
                   2287: 	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
1.122     albertel 2288: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2289: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2290: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2291: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2292: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2293: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.122     albertel 2294:     } 
                   2295:     return $currentstring;
                   2296: }
                   2297:         
                   2298: sub end_tr {
1.160     sakharuk 2299:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2300:     my $currentstring = &end_p();	# Close any pending <p> in the row.
1.122     albertel 2301:     if ($target eq 'web') {
1.277     foxr     2302: 	$currentstring .= $token->[2];     
1.122     albertel 2303:     } elsif ($target eq 'tex') {
1.160     sakharuk 2304: 	if ($Apache::londefdef::TD_redirection) {
                   2305: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2306: 	}
1.300     foxr     2307: 	# Counter columns must be the maximum number of columns seen
                   2308: 	# in the table so far so:
                   2309: 	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
                   2310: 	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
                   2311: 	}
1.295     foxr     2312: 
                   2313: 
1.294     foxr     2314: 	
1.122     albertel 2315:     }
                   2316:     return $currentstring;
                   2317: }
                   2318: 
1.166     sakharuk 2319: #-- <td> tag (end tag optional)
1.122     albertel 2320: sub start_td {
                   2321:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2322:     my $currentstring = '';
                   2323:     if ($target eq 'web') {
                   2324: 	$currentstring = $token->[4];     
                   2325:     } elsif ($target eq 'tex') {
1.160     sakharuk 2326: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2327: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2328:     } 
                   2329:     return $currentstring;
                   2330: }   
1.159     sakharuk 2331:     
                   2332: sub tag_check {
                   2333:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2334:     my @ar=@$parstack; 
                   2335:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2336: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2337: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2338: 	    last;
                   2339: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2340: 	    splice @ar, $i+1;
                   2341: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2342: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2343: 	    last;
1.159     sakharuk 2344: 	}
1.160     sakharuk 2345:     }
1.159     sakharuk 2346:     return '';
                   2347: }
                   2348:  
                   2349: sub start_td_tex {
                   2350:     my ($parstack,$parser,$safeeval) = @_;
1.206     sakharuk 2351:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2352:     if ($alignchar eq '') {
                   2353: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2354:     }
1.206     sakharuk 2355:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2356:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2357:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2358:     if (defined $TeXwidth) {		
                   2359: 	my $current_length=&recalc($TeXwidth);
                   2360: 	$current_length=~/(\d+\.?\d*)/;
                   2361: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2362:     }
1.159     sakharuk 2363:     &Apache::lonxml::startredirection();
                   2364:     return '';
                   2365: }
                   2366: 
                   2367: sub end_td_tex {
                   2368:     my ($parstack,$parser,$safeeval) = @_;
                   2369:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   2370:     my $data=&Apache::lonxml::endredirection();
                   2371:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2372:     if (defined $TeXwidth) {		
1.206     sakharuk 2373: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2374: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2375: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.159     sakharuk 2376:     } else {
1.206     sakharuk 2377: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2378: 	    my $garbage_data=$data;
                   2379: 	    my $fwidth=0;
                   2380:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2381: 		my $current_length=&recalc($1);
                   2382: 		$current_length=~/(\d+\.?\d*)/;
                   2383: 		if ($fwidth<$1) {$fwidth=$1;}
                   2384: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2385: 	    }
                   2386:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2387: 		my $current_length=$1;
                   2388: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2389: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2390: 	    }
                   2391: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2392: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2393: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2394: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.231     sakharuk 2395: 	} elsif ($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)*/) {
                   2396: 	    my $garbage_data=$data;
                   2397: 	    my $fwidth=0;
                   2398:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2399: 		my $current_length=&recalc($1);
                   2400: 		$current_length=~/(\d+\.?\d*)/;
                   2401: 		if ($fwidth<$1) {$fwidth=$1;}
                   2402: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2403: 	    }
                   2404:             while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2405: 		my $current_length=&recalc($1);
                   2406: 		$current_length=~/(\d+\.?\d*)/;
                   2407: 		if ($fwidth<$1) {$fwidth=$1;}
                   2408: 		$garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2409: 	    }
                   2410: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2411: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2412: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2413: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2414: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2415: 	} else {  
1.166     sakharuk 2416: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2417: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2418: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2419: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2420: 	    if ($data=~/\\vskip/) {
                   2421:                 my $newdata=$data;
                   2422: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2423: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2424: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2425: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2426: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2427:                     my @words=split(/ /,$elementdata);
                   2428: 		    foreach my $word (@words) {
                   2429: 			my $lengthword=2.5*&LATEX_length($word);
                   2430: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2431: 		    }
1.166     sakharuk 2432: 		}
                   2433: 	    } else {
1.206     sakharuk 2434: 		$current_length=2.5*&LATEX_length($data);
                   2435:                     my @words=split(/ /,$data);
                   2436: 		    foreach my $word (@words) {
1.228     sakharuk 2437: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2438: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2439: 		    }
1.166     sakharuk 2440: 	    }
1.206     sakharuk 2441: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2442: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2443: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2444: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
1.159     sakharuk 2445: 	}        
                   2446:     }
1.302     foxr     2447:     # Substitute all of the tables nested in this cell in their appropriate places.
                   2448: 
                   2449: 
                   2450:     my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
                   2451:     for (my $in=0; $in<=$nested_count; $in++) {    
1.301     foxr     2452: 	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
                   2453: 	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
                   2454: 	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2455: 	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
                   2456: 
                   2457:     }
                   2458:     # Should be be killing off the 'include' elements as they're used up?
1.206     sakharuk 2459:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.301     foxr     2460:     return '';
1.159     sakharuk 2461: }
                   2462: 
1.122     albertel 2463: sub end_td {
1.126     sakharuk 2464:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2465:     my $currentstring = '';
                   2466:     if ($target eq 'web') {
                   2467: 	$currentstring = $token->[2];     
                   2468:     } elsif ($target eq 'tex') {
1.160     sakharuk 2469:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2470: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2471:     }
                   2472:     return $currentstring;
                   2473: }
                   2474: 
1.166     sakharuk 2475: #-- <th> tag (end tag optional)
1.122     albertel 2476: sub start_th {
                   2477:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2478:     my $currentstring = '';
                   2479:     if ($target eq 'web') {
                   2480: 	$currentstring = $token->[4];     
                   2481:     } elsif ($target eq 'tex') {
1.230     sakharuk 2482: 	$Apache::londefdef::TD_redirection = 1;
                   2483: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2484:     } 
                   2485:     return $currentstring;
1.130     sakharuk 2486: }   
1.230     sakharuk 2487:     
                   2488: sub tagg_check {
                   2489:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2490:     my @ar=@$parstack; 
                   2491:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2492: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2493: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2494: 	    last;
                   2495: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2496: 	    splice @ar, $i+1;
                   2497: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   2498: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2499: 	    last;
                   2500: 	}
                   2501:     }
                   2502:     return '';
                   2503: }
                   2504:  
                   2505: sub start_th_tex {
                   2506:     my ($parstack,$parser,$safeeval) = @_;
                   2507:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2508:     if ($alignchar eq '') {
                   2509: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   2510:     }
                   2511:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   2512:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   2513:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2514:     if (defined $TeXwidth) {		
                   2515: 	my $current_length=&recalc($TeXwidth);
                   2516: 	$current_length=~/(\d+\.?\d*)/;
                   2517: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2518:     }
                   2519:     &Apache::lonxml::startredirection();
                   2520:     return '';
                   2521: }
                   2522: 
                   2523: sub end_th_tex {
                   2524:     my ($parstack,$parser,$safeeval) = @_;
                   2525:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   2526:     my $data=&Apache::lonxml::endredirection();
                   2527:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2528:     if (defined $TeXwidth) {		
                   2529: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2530: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2531: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2532:     } else {
                   2533: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2534: 	    my $garbage_data=$data;
                   2535: 	    my $fwidth=0;
                   2536:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2537: 		my $current_length=&recalc($1);
                   2538: 		$current_length=~/(\d+\.?\d*)/;
                   2539: 		if ($fwidth<$1) {$fwidth=$1;}
                   2540: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2541: 	    }
                   2542:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2543: 		my $current_length=$1;
                   2544: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2545: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2546: 	    }
                   2547: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2548: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2549: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2550: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2551: 	} else {  
                   2552: 	    $data=~s/^\s+(\S.*)/$1/; 
                   2553: 	    $data=~s/(.*\S)\s+$/$1/;
                   2554: 	    $data=~s/(\s)+/$1/;
                   2555: 	    my ($current_length,$min_length)=(0,0);
                   2556: 	    if ($data=~/\\vskip/) {
                   2557:                 my $newdata=$data;
                   2558: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2559: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2560: 		foreach my $elementdata (@newdata) {
                   2561: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   2562: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   2563:                     my @words=split(/ /,$elementdata);
                   2564: 		    foreach my $word (@words) {
                   2565: 			my $lengthword=2.5*&LATEX_length($word);
                   2566: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2567: 		    }
                   2568: 		}
                   2569: 	    } else {
                   2570: 		$current_length=2.5*&LATEX_length($data);
                   2571:                     my @words=split(/ /,$data);
                   2572: 		    foreach my $word (@words) {
                   2573: 			my $lengthword=2*&LATEX_length($word);
                   2574: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2575: 		    }
                   2576: 	    }
                   2577: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2578: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2579: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2580: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2581: 	}        
                   2582:     }
                   2583: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   2584: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2585: 	}
                   2586:     #make data bold
                   2587:     $data='\textbf{'.$data.'}';
                   2588:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
                   2589:     return'';
                   2590: }
                   2591: 
1.122     albertel 2592: sub end_th {
1.130     sakharuk 2593:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2594:     my $currentstring = &end_p();	# Close any open <p> in the row.
1.122     albertel 2595:     if ($target eq 'web') {
1.277     foxr     2596: 	$currentstring .= $token->[2];     
1.122     albertel 2597:     } elsif ($target eq 'tex') {
1.230     sakharuk 2598:         $Apache::londefdef::TD_redirection =0;
                   2599: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 2600:     }
                   2601:     return $currentstring;
                   2602: }
1.230     sakharuk 2603:      
1.181     sakharuk 2604: #-- <img> tag (end tag forbidden)
1.249     foxr     2605: #
                   2606: #  Render the <IMG> tag.
                   2607: #     <IMG> has the following attributes (in addition to the 
                   2608: #     standard HTML ones:
                   2609: #      TeXwrap   - Governs how the tex target will try to wrap text around
                   2610: #                  horizontally aligned images.
                   2611: #      TeXwidth  - The width of the image when rendered for print (mm).
                   2612: #      TeXheight - The height of the image when rendered for print (mm)
                   2613: #         (Note there seems to also be support for this as a % of page size)
                   2614: #      
1.122     albertel 2615: sub start_img {
1.299     albertel 2616:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel 2617:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   2618: 					 undef,1);
1.189     albertel 2619:     if (not $src and ($target eq 'web' or $target eq 'tex')) { 
1.299     albertel 2620: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
1.189     albertel 2621: 	return '';
                   2622:     }
1.290     albertel 2623:     &Apache::lonxml::extlink($src);
1.122     albertel 2624:     my $currentstring = '';
                   2625:     my $scaling = .3;
1.249     foxr     2626: 
                   2627:    # Render unto browsers that which are the browser's...
                   2628: 
1.122     albertel 2629:     if ($target eq 'web') {
1.267     albertel 2630: 	if ($env{'browser.imagesuppress'} ne 'on') {
1.250     albertel 2631: 	    $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 2632: 	} else {
                   2633: 	    my $alttag= &Apache::lonxml::get_param
                   2634: 		('alt',$parstack,$safeeval,undef,1);
                   2635: 	    unless ($alttag) {
                   2636: 		$alttag=&Apache::lonmeta::alttag
                   2637: 		    ($Apache::lonxml::pwd[-1],$src);
1.51      sakharuk 2638: 	    }
1.158     sakharuk 2639: 	    $currentstring.='[IMAGE: '.$alttag.']';
1.1       sakharuk 2640: 	}
1.249     foxr     2641: 
                   2642: 	# and render unto TeX that which is LaTeX
                   2643: 
1.122     albertel 2644:     } elsif ($target eq 'tex') {
1.248     foxr     2645: 	#
                   2646: 	#  The alignment will require some superstructure to be put around
                   2647: 	#  the \includegraphics stuff.  At present we can only partially
                   2648: 	#  simulate the alignments offered by html.
                   2649: 	#
                   2650: 	#
                   2651: 	my $align = lc(&Apache::lonxml::get_param('align', 
                   2652: 						  $parstack,
                   2653: 						  $safeeval,
                   2654: 						  undef,1));
                   2655: 	if(!$align) {
1.302.2.1  albertel 2656: 	    # disabled for now see BUG#4535
1.302.2.3! albertel 2657: 	    if (&is_inside_of($tagstack, "table")) {
        !          2658: 		$align = "top";      # Force top of image to top of table cell 
1.287     foxr     2659: 	    } else {
                   2660: 		$align = "bottom";	# This is html's default so it's ours too.
                   2661: 	    }
1.248     foxr     2662: 	}
                   2663: 	#
                   2664: 	&Apache::lonxml::debug("Alignemnt = $align");
                   2665: 	#  LaTeX's image/text wrapping is really bad since it wants to
                   2666: 	#  make figures float.  
                   2667:         #   The user has the optional parameter (applicable only to l/r
                   2668: 	# alignment to use the picins/parpic directive to get wrapped text
                   2669: 	# this is also imperfect.. that's why we give them a choice...
                   2670: 	# so they can't yell at us for our choice.
                   2671: 	#
                   2672: 	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
                   2673: 							    $parstack,
                   2674: 							    $safeeval,
                   2675: 							    undef,0);
                   2676: 	&Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
                   2677: 	if(!$latex_rendering) {
1.288     foxr     2678: 	    $latex_rendering = "texwrap";
1.248     foxr     2679: 	}
1.261     foxr     2680: 	&Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
1.248     foxr     2681: 
1.256     albertel 2682: 	#if original gif/jpg/png file exist do following:
1.266     albertel 2683: 	my $origsrc=$src;
1.256     albertel 2684: 	my ($path,$file) = &get_eps_image($src);
1.122     albertel 2685: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.261     foxr     2686: 	&Apache::lonxml::debug("path = $path file = $file src = $src");
1.192     sakharuk 2687: 	if (-e $src) {
1.261     foxr     2688: 	    &Apache::lonxml::debug("$src exists");
1.256     albertel 2689: 	    my ($height_param,$width_param)=
1.266     albertel 2690: 		&image_size($origsrc,0.3,$parstack,$safeeval);
1.262     foxr     2691: 	    my $destpath = $path;
1.263     foxr     2692: 	    $destpath    =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
                   2693: 	    my $destfile = $file;
                   2694: 	    $destfile    =~ s/ /\_/g;
1.266     albertel 2695: 	    my $size;
                   2696: 	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
                   2697: 	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
                   2698: 	    $size='['.$size;
                   2699: 	    $size=~s/,$/]/; 
1.262     foxr     2700: 	    $currentstring .= '\graphicspath{{'.$destpath.'}}'
1.266     albertel 2701: 		.'\includegraphics'.$size.'{'.$destfile.'} ';
1.256     albertel 2702: 
1.248     foxr     2703: 	    #    If there's an alignment specification we need to honor it here.
                   2704: 	    #    For the horizontal alignments, we will also honor the
                   2705: 	    #    value of the latex specfication.  The default is parbox,
                   2706: 	    #    and that's used for illegal values too.  
                   2707: 	    #    
                   2708: 	    #    Even though we set a default alignment value, the user
                   2709: 	    #    could have given us an illegal value.  In that case we
                   2710: 	    #    just use the default alignment of bottom..
                   2711: 	    if      ($align eq "top")    {
                   2712: 		$currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
                   2713: 	    } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
                   2714: 		my $offset = $height_param/2;
                   2715: 		$currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
                   2716: 	    } elsif ($align eq "left")   { 
                   2717: 		if ($latex_rendering eq "parpic") { 
                   2718: 		    $currentstring = '\parpic[l]{'.$currentstring.'}';
1.286     foxr     2719: 		} else {    	                                 # wrapfig render
                   2720: 		    $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
                   2721: 			.'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
1.248     foxr     2722: 		}
                   2723: 	    } elsif ($align eq "right")  {   
                   2724: 		if ($latex_rendering eq "parpic") {
                   2725: 		    $currentstring = '\parpic[r]{'.$currentstring.'}';
1.286     foxr     2726: 		} else {	                                 # wrapfig rendering
                   2727: 		    $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
                   2728: 			.'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
                   2729: 
1.248     foxr     2730: 		}
                   2731: 	    } else {		# Bottom is also default.
                   2732: 		# $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
                   2733: 	    }
1.122     albertel 2734: 	} else {
1.261     foxr     2735: 	    &Apache::lonxml::debug("$src does not exist");
1.122     albertel 2736: 	    #original image file doesn't exist so check the alt attribute
                   2737: 	    my $alt = 
                   2738: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   2739: 	    unless ($alt) {
                   2740: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   2741: 	    }
                   2742: 
1.256     albertel 2743: 	    if ($alt) { $currentstring .= ' '.$alt.' '; }
1.59      sakharuk 2744: 	}
1.249     foxr     2745: 
                   2746: 	# And here's where the semi-quote breaks down: allow the user
                   2747:         # to edit the beast as well by rendering the problem for edit:
1.186     albertel 2748:     } elsif ($target eq 'edit') {
                   2749: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   2750: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
                   2751: 	    &Apache::edit::browse('src',undef,'alt').' '.
                   2752: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   2753: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   2754: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   2755: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   2756: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   2757: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 2758: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   2759: 						   ['','bottom','middle','top','left','right'],$token,5);
1.249     foxr     2760: 	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
                   2761: 						   ['', 'parbox', 'parpic'], $token, 2);
1.186     albertel 2762: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.249     foxr     2763: 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
                   2764: 	my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   2765: 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
                   2766: 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
                   2767: 
                   2768: 
1.186     albertel 2769: 	$currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   2770: 	if ($width) { $currentstring.=' width="'.$width.'" '; }
                   2771: 	if ($height) { $currentstring.=' height="'.$height.'" '; }
                   2772: 	$currentstring .= ' />';
                   2773:     } elsif ($target eq 'modified') {
1.210     albertel 2774: 	my ($osrc,$owidth,$oheight)=
                   2775: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2776: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 2777: 					     $safeeval,'src','alt','align',
1.249     foxr     2778: 					     'TeXwidth','TeXheight', 'TeXwrap',
1.210     albertel 2779: 					     'width','height');
                   2780: 	my ($nsrc,$nwidth,$nheight)=
                   2781: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2782: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   2783: 	&image_replication($loc);
                   2784: 	my ($iwidth,$iheight);
                   2785: 	if (-e $loc) {
                   2786: 	    my $image = Image::Magick->new;
                   2787: 	    $image->Read($loc);
                   2788: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   2789: 				   $image->Get('height'));
                   2790: 	}
                   2791: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   2792: 	    # changed image or no size specified,
                   2793:             # if they didn't explicitly change the 
                   2794:             # width or height use the ones from the image
                   2795: 	    if ($iwidth && $iheight) {
                   2796: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   2797: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   2798: 		}
                   2799: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   2800: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 2801: 		}
                   2802: 	    }
                   2803: 	}
1.210     albertel 2804: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   2805: 	# if we don't have a width or height
                   2806: 	if ($iwidth && $cwidth && !$cheight) {
                   2807: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   2808: 	}
                   2809: 	if ($iheight && $cheight && !$cwidth) {
                   2810: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   2811: 	}
                   2812: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 2813:     }
1.261     foxr     2814: 
1.122     albertel 2815:     return $currentstring;
                   2816: }
                   2817: 
                   2818: sub end_img {
                   2819:     my ($target,$token) = @_;
                   2820:     my $currentstring = '';
                   2821:     if ($target eq 'web') {
                   2822: 	$currentstring = $token->[2];
                   2823:     } elsif ($target eq 'tex') {
                   2824: 	$currentstring = '';
                   2825:     }
                   2826:     return $currentstring;
                   2827: }
                   2828: 
1.181     sakharuk 2829: #-- <applet> tag (end tag required)
1.122     albertel 2830: sub start_applet {
                   2831:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2832:     
                   2833:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
1.290     albertel 2834:     &Apache::lonxml::extlink($code);
1.122     albertel 2835:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   2836: 					   undef,1);
1.290     albertel 2837:     &Apache::lonxml::extlink($archive);
1.122     albertel 2838:     my $currentstring = '';
                   2839:     if ($target eq 'web') {
1.267     albertel 2840: 	if ($env{'browser.appletsuppress'} ne 'on') {
1.250     albertel 2841: 	    $currentstring = &Apache::lonenc::encrypt_ref($token,
                   2842: 							  {'code'=>$code,
                   2843: 							   'archive'=>$archive}
                   2844: 							  );
1.122     albertel 2845: 	} else {
                   2846: 	    my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   2847: 						   $safeeval,undef,1);
                   2848: 	    unless ($alttag) {
                   2849: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   2850: 						 $code);
1.44      sakharuk 2851: 	    }
1.122     albertel 2852: 	    $currentstring='[APPLET: '.$alttag.']';
1.1       sakharuk 2853: 	}
1.122     albertel 2854:     } elsif ($target eq 'tex') {
1.177     albertel 2855: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   2856: 					       $safeeval,undef,1);
                   2857: 	unless ($alttag) {
                   2858: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   2859: 						undef,1);
                   2860: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   2861: 					     $code);
1.175     sakharuk 2862: 	}
1.177     albertel 2863: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   2864: 	    '.}\end{center}';
1.122     albertel 2865:     } 
                   2866:     return $currentstring;
                   2867: }
                   2868: 
                   2869: sub end_applet {
                   2870:     my ($target,$token) = @_;
                   2871:     my $currentstring = '';
                   2872:     if ($target eq 'web') {
                   2873: 	$currentstring = $token->[2];
                   2874:     } elsif ($target eq 'tex') {
                   2875:     } 
                   2876:     return $currentstring;
                   2877: }
                   2878: 
1.181     sakharuk 2879: #-- <embed> tag (end tag optional/required)
1.122     albertel 2880: sub start_embed {    
                   2881:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2882:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 2883:     &Apache::lonxml::extlink($src);
1.122     albertel 2884:     my $currentstring = '';
                   2885:     if ($target eq 'web') {
1.267     albertel 2886: 	if ($env{'browser.embedsuppress'} ne 'on') {
1.250     albertel 2887: 	    $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 2888: 	} else {
                   2889: 	    my $alttag=&Apache::lonxml::get_param
                   2890: 		('alt',$parstack,$safeeval,undef,1);
                   2891: 	    unless ($alttag) {
                   2892: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
1.42      albertel 2893: 	    }
1.122     albertel 2894: 	    $currentstring='[EMBED: '.$alttag.']';
1.10      www      2895: 	}
1.122     albertel 2896:     } elsif ($target eq 'tex') {
                   2897:     } 
                   2898:     return $currentstring;
                   2899: }
                   2900: 
                   2901: sub end_embed {
                   2902:     my ($target,$token) = @_;
                   2903:     my $currentstring = '';
                   2904:     if ($target eq 'web') {
                   2905: 	$currentstring = $token->[2];     
1.175     sakharuk 2906:     } elsif ($target eq 'tex') {  
1.122     albertel 2907:     } 
                   2908:     return $currentstring;
                   2909: }
                   2910: 
1.181     sakharuk 2911: #-- <param> tag (end tag forbidden)
1.122     albertel 2912: sub start_param {
                   2913:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.290     albertel 2914:     if (&Apache::lonxml::get_param('name',$parstack,
                   2915: 				   $safeeval,undef,1)=~/^cabbase$/i) {
                   2916: 	my $value=&Apache::lonxml::get_param('value',$parstack,
                   2917: 					     $safeeval,undef,1);
                   2918: 	&Apache::lonxml::extlink($value);
                   2919:     } 
                   2920:   
                   2921:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   2922:     &Apache::lonxml::extlink($src);
1.122     albertel 2923:     my $currentstring = '';
                   2924:     if ($target eq 'web') {
1.250     albertel 2925: 	my %toconvert;
                   2926: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   2927: 	if ($src) { $toconvert{'src'}= $src; }
                   2928: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
                   2929: 					    undef,1);
1.251     albertel 2930: 	if ($name=~/^cabbase$/i) {
                   2931: 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
                   2932: 							   $safeeval,undef,1);
                   2933: 	}
1.250     albertel 2934: 	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
1.122     albertel 2935:     } elsif ($target eq 'tex') {
                   2936:     } 
                   2937:     return $currentstring;
                   2938: }
                   2939: 
                   2940: sub end_param {
                   2941:     my ($target,$token) = @_;
                   2942:     my $currentstring = '';
                   2943:     if ($target eq 'web') {
                   2944: 	$currentstring = $token->[2];     
                   2945:     } elsif ($target eq 'tex') {
                   2946:     } 
                   2947:     return $currentstring;
                   2948: }
                   2949: 
                   2950: #-- <allow> tag
                   2951: sub start_allow {
                   2952:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2953:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 2954:     &Apache::lonxml::extlink($src);
                   2955: 
1.241     albertel 2956:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 2957:     my $result;
                   2958:     if ($target eq 'edit') {
                   2959: 	$result .=&Apache::edit::tag_start($target,$token);
                   2960: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   2961: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   2962:     } elsif ($target eq 'modified') {
                   2963: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2964: 						     $safeeval,'src');
                   2965: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2966:     }
                   2967:     return $result;
                   2968: }
                   2969: 
                   2970: sub end_allow {
                   2971:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2972:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   2973:     return '';
                   2974: }
1.119     www      2975: 
1.181     sakharuk 2976: #-- Frames (end tag required)
                   2977: #-- <frameset>
1.122     albertel 2978: sub start_frameset {
                   2979:     my ($target,$token) = @_;
1.277     foxr     2980:     my $currentstring = '';	# Close any pending para.
1.122     albertel 2981:     if ($target eq 'web') { 
1.180     albertel 2982: 	if (!$Apache::lonxml::registered &&
1.267     albertel 2983: 	    $env{'request.state'} eq 'published') {
1.122     albertel 2984: 	    $currentstring.='<head>'.
                   2985: 		&Apache::lonmenu::registerurl(undef,$target).'</head>';
1.10      www      2986: 	}
1.133     www      2987: 	my $onLoad='';
                   2988: 	foreach my $key (keys(%{$token->[2]})) {
                   2989: 	    if ($key =~ /^onload$/i) {
                   2990: 		$onLoad.=$token->[2]->{$key}.';';
                   2991: 		delete($token->[2]->{$key});
                   2992: 	    }
                   2993: 	}
                   2994: 	$token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
                   2995: 	my $onUnload='';
                   2996: 	foreach my $key (keys(%{$token->[2]})) {
                   2997: 	    if ($key =~ /^onunload$/i) {
                   2998: 		$onUnload.=$token->[2]->{$key}.';';
                   2999: 		delete($token->[2]->{$key});
                   3000: 	    }
                   3001: 	}
                   3002: 	$token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
                   3003: 	    ';'.$onUnload;
                   3004: 	
                   3005: 	$currentstring .= '<'.$token->[1];
                   3006: 	foreach (keys %{$token->[2]}) {
                   3007: 	    $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
                   3008: 	}
                   3009: 	$currentstring.='>';
1.122     albertel 3010:     }
                   3011:     return $currentstring;
                   3012: }
                   3013: 
                   3014: sub end_frameset {
                   3015:     my ($target,$token) = @_;
                   3016:     my $currentstring = '';
                   3017:     if ($target eq 'web') {
                   3018: 	$currentstring = $token->[2];
                   3019:     }
                   3020:     return $currentstring;
                   3021: }
1.162     sakharuk 3022: 
1.181     sakharuk 3023: #-- <xmp> (end tag required)
1.162     sakharuk 3024: sub start_xmp {
                   3025:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3026:     my $currentstring = '';
                   3027:     if ($target eq 'web') {
                   3028: 	$currentstring .= $token->[4];
                   3029:     } elsif ($target eq 'tex') {
                   3030: 	$currentstring .= '\begin{verbatim}';
                   3031:     } 
                   3032:     return $currentstring;
                   3033: }
                   3034: 
                   3035: sub end_xmp {
                   3036:     my ($target,$token) = @_;
                   3037:     my $currentstring = '';
                   3038:     if ($target eq 'web') {
                   3039: 	$currentstring .= $token->[2];
                   3040:     } elsif ($target eq 'tex') {
                   3041: 	$currentstring .= '\end{verbatim}';
                   3042:     }
                   3043:     return $currentstring;
                   3044: }
                   3045: 
1.181     sakharuk 3046: #-- <pre> (end tag required)
1.122     albertel 3047: sub start_pre {
1.126     sakharuk 3048:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3049:     my $currentstring = &end_p();	# close off pending <p>
1.122     albertel 3050:     if ($target eq 'web') {
                   3051: 	$currentstring .= $token->[4];
                   3052:     } elsif ($target eq 'tex') {
1.136     sakharuk 3053: 	$currentstring .= '\begin{verbatim}';
1.122     albertel 3054:     } 
                   3055:     return $currentstring;
                   3056: }
                   3057: 
                   3058: sub end_pre {
                   3059:     my ($target,$token) = @_;
                   3060:     my $currentstring = '';
                   3061:     if ($target eq 'web') {
                   3062: 	$currentstring .= $token->[2];
                   3063:     } elsif ($target eq 'tex') {
1.136     sakharuk 3064: 	$currentstring .= '\end{verbatim}';
1.122     albertel 3065:     }
                   3066:     return $currentstring;
                   3067: }
                   3068: 
                   3069: #-- <insert>
                   3070: sub start_insert {
                   3071:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3072:     my $currentstring = '';
                   3073:     if ($target eq 'web') {
                   3074: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3075: 	$currentstring .= '<b>'.$display.'</b>';;
                   3076:     }
                   3077:     return $currentstring;
                   3078: }
                   3079: 
                   3080: sub end_insert {
                   3081:     my ($target,$token) = @_;
                   3082:     my $currentstring = '';
                   3083:     if ($target eq 'web') {
                   3084: 	$currentstring .= '';
                   3085:     }
                   3086:     return $currentstring;
                   3087: }
                   3088: 
                   3089: #-- <externallink>
                   3090: sub start_externallink {
                   3091:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3092:     my $currentstring = '';
                   3093:     if ($target eq 'web') {
                   3094: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3095: 	$currentstring .= '<b>'.$display.'</b>';;
                   3096:     }
                   3097:     return $currentstring;
                   3098: }
                   3099: 
                   3100: sub end_externallink {
                   3101:     my ($target,$token) = @_;
                   3102:     my $currentstring = '';
                   3103:     if ($target eq 'web') {
                   3104: 	$currentstring .= '';
                   3105:     }
                   3106:     return $currentstring;
                   3107: }
                   3108: 
                   3109: #-- <blankspace heigth="">
                   3110: sub start_blankspace {
                   3111:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3112:     my $currentstring = &end_p();	# closes off any unclosed <p>
1.122     albertel 3113:     if ($target eq 'tex') {
                   3114: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   3115: 	$currentstring .= '\vskip '.$howmuch.' ';
                   3116:     }
                   3117:     return $currentstring;
                   3118: }
                   3119: 
                   3120: sub end_blankspace {
                   3121:     my ($target,$token) = @_;
                   3122:     my $currentstring = '';
                   3123:     if ($target eq 'tex') {
                   3124: 	$currentstring .= '';
                   3125:     }
                   3126:     return $currentstring;
                   3127: }
                   3128: 
1.181     sakharuk 3129: #-- <abbr> tag (end tag required)
1.122     albertel 3130: sub start_abbr {
                   3131:     my ($target,$token) = @_;
                   3132:     my $currentstring = '';
                   3133:     if ($target eq 'web') {
                   3134: 	$currentstring = $token->[4];     
                   3135:     } 
                   3136:     return $currentstring;
                   3137: }
                   3138: 
                   3139: sub end_abbr {
                   3140:     my ($target,$token) = @_;
                   3141:     my $currentstring = '';
                   3142:     if ($target eq 'web') {
                   3143: 	$currentstring = $token->[2];    
                   3144:     } 
                   3145:     return $currentstring;
                   3146: }
                   3147: 
1.181     sakharuk 3148: #-- <acronym> tag (end tag required)
1.122     albertel 3149: sub start_acronym {
                   3150:     my ($target,$token) = @_;
                   3151:     my $currentstring = '';
                   3152:     if ($target eq 'web') {
                   3153: 	$currentstring = $token->[4];     
                   3154:     } 
                   3155:     return $currentstring;
                   3156: }
                   3157: 
                   3158: sub end_acronym {
                   3159:     my ($target,$token) = @_;
                   3160:     my $currentstring = '';
                   3161:     if ($target eq 'web') {
                   3162: 	$currentstring = $token->[2];    
                   3163:     } 
                   3164:     return $currentstring;
                   3165: }
                   3166: 
1.181     sakharuk 3167: #-- <area> tag (end tag forbidden)
1.122     albertel 3168: sub start_area {
                   3169:     my ($target,$token) = @_;
                   3170:     my $currentstring = '';
                   3171:     if ($target eq 'web') {
                   3172: 	$currentstring = $token->[4];     
                   3173:     } 
                   3174:     return $currentstring;
                   3175: }
                   3176: 
                   3177: sub end_area {
                   3178:     my ($target,$token) = @_;
                   3179:     my $currentstring = '';
                   3180:     if ($target eq 'web') {
                   3181: 	$currentstring = $token->[2];    
                   3182:     } 
                   3183:     return $currentstring;
                   3184: }
                   3185: 
1.181     sakharuk 3186: #-- <base> tag (end tag forbidden)
1.122     albertel 3187: sub start_base {
                   3188:     my ($target,$token) = @_;
                   3189:     my $currentstring = '';
                   3190:     if ($target eq 'web') {
                   3191: 	$currentstring = $token->[4];     
1.161     sakharuk 3192:     }
1.122     albertel 3193:     return $currentstring;
                   3194: }
                   3195: 
                   3196: sub end_base {
                   3197:     my ($target,$token) = @_;
                   3198:     my $currentstring = '';
                   3199:     if ($target eq 'web') {
                   3200: 	$currentstring = $token->[2];    
                   3201:     } 
                   3202:     return $currentstring;
                   3203: }
                   3204: 
1.181     sakharuk 3205: #-- <bdo> tag (end tag required)
1.122     albertel 3206: sub start_bdo {
                   3207:     my ($target,$token) = @_;
                   3208:     my $currentstring = '';
                   3209:     if ($target eq 'web') {
                   3210: 	$currentstring = $token->[4];     
                   3211:     } 
                   3212:     return $currentstring;
                   3213: }
                   3214: 
                   3215: sub end_bdo {
                   3216:     my ($target,$token) = @_;
                   3217:     my $currentstring = '';
                   3218:     if ($target eq 'web') {
                   3219: 	$currentstring = $token->[2];    
                   3220:     } 
                   3221:     return $currentstring;
                   3222: }
                   3223: 
1.181     sakharuk 3224: #-- <bgsound> tag (end tag optional)
1.122     albertel 3225: sub start_bgsound {
                   3226:     my ($target,$token) = @_;
                   3227:     my $currentstring = '';
                   3228:     if ($target eq 'web') {
                   3229: 	$currentstring = $token->[4];     
                   3230:     } 
                   3231:     return $currentstring;
                   3232: }
                   3233: 
                   3234: sub end_bgsound {
                   3235:     my ($target,$token) = @_;
                   3236:     my $currentstring = '';
                   3237:     if ($target eq 'web') {
                   3238: 	$currentstring = $token->[2];    
                   3239:     } 
                   3240:     return $currentstring;
                   3241: }
                   3242: 
1.181     sakharuk 3243: #-- <blink> tag (end tag required)
1.122     albertel 3244: sub start_blink {
                   3245:     my ($target,$token) = @_;
                   3246:     my $currentstring = '';
                   3247:     if ($target eq 'web') {
                   3248: 	$currentstring = $token->[4];     
                   3249:     } 
                   3250:     return $currentstring;
                   3251: }
                   3252: 
                   3253: sub end_blink {
                   3254:     my ($target,$token) = @_;
                   3255:     my $currentstring = '';
                   3256:     if ($target eq 'web') {
                   3257: 	$currentstring = $token->[2];    
                   3258:     } 
                   3259:     return $currentstring;
                   3260: }
                   3261: 
1.181     sakharuk 3262: #-- <blockquote> tag (end tag required)
1.122     albertel 3263: sub start_blockquote {
                   3264:     my ($target,$token) = @_;
1.279     foxr     3265:     my $currentstring = &end_p();	# Close any unclosed <p>
1.122     albertel 3266:     if ($target eq 'web') {
1.277     foxr     3267: 	$currentstring .= $token->[4];     
1.122     albertel 3268:     } 
                   3269:     return $currentstring;
                   3270: }
                   3271: 
                   3272: sub end_blockquote {
                   3273:     my ($target,$token) = @_;
                   3274:     my $currentstring = '';
                   3275:     if ($target eq 'web') {
                   3276: 	$currentstring = $token->[2];    
                   3277:     } 
                   3278:     return $currentstring;
                   3279: }
                   3280: 
1.181     sakharuk 3281: #-- <button> tag (end tag required)
1.122     albertel 3282: sub start_button {
                   3283:     my ($target,$token) = @_;
                   3284:     my $currentstring = '';
                   3285:     if ($target eq 'web') {
                   3286: 	$currentstring = $token->[4];     
                   3287:     } 
                   3288:     return $currentstring;
                   3289: }
                   3290: 
                   3291: sub end_button {
                   3292:     my ($target,$token) = @_;
                   3293:     my $currentstring = '';
                   3294:     if ($target eq 'web') {
                   3295: 	$currentstring = $token->[2];    
                   3296:     } 
                   3297:     return $currentstring;
                   3298: }
                   3299: 
1.181     sakharuk 3300: #-- <caption> tag (end tag required)
1.122     albertel 3301: sub start_caption {
                   3302:     my ($target,$token) = @_;
                   3303:     my $currentstring = '';
                   3304:     if ($target eq 'web') {
                   3305: 	$currentstring = $token->[4];     
                   3306:     } 
                   3307:     return $currentstring;
                   3308: }
                   3309: 
                   3310: sub end_caption {
                   3311:     my ($target,$token) = @_;
                   3312:     my $currentstring = '';
                   3313:     if ($target eq 'web') {
                   3314: 	$currentstring = $token->[2];    
                   3315:     } 
                   3316:     return $currentstring;
                   3317: }
                   3318: 
1.181     sakharuk 3319: #-- <col> tag (end tag forbdden)
1.122     albertel 3320: sub start_col {
                   3321:     my ($target,$token) = @_;
                   3322:     my $currentstring = '';
                   3323:     if ($target eq 'web') {
                   3324: 	$currentstring = $token->[4];     
                   3325:     } 
                   3326:     return $currentstring;
                   3327: }
                   3328: 
                   3329: sub end_col {
                   3330:     my ($target,$token) = @_;
                   3331:     my $currentstring = '';
                   3332:     if ($target eq 'web') {
                   3333: 	$currentstring = $token->[2];    
                   3334:     } 
                   3335:     return $currentstring;
                   3336: }
                   3337: 
1.181     sakharuk 3338: #-- <colgroup> tag (end tag optional)
1.122     albertel 3339: sub start_colgroup {
                   3340:     my ($target,$token) = @_;
                   3341:     my $currentstring = '';
                   3342:     if ($target eq 'web') {
                   3343: 	$currentstring = $token->[4];     
                   3344:     } 
                   3345:     return $currentstring;
                   3346: }
                   3347: 
                   3348: sub end_colgroup {
                   3349:     my ($target,$token) = @_;
                   3350:     my $currentstring = '';
                   3351:     if ($target eq 'web') {
                   3352: 	$currentstring = $token->[2];    
                   3353:     } 
                   3354:     return $currentstring;
                   3355: }
                   3356: 
1.181     sakharuk 3357: #-- <del> tag (end tag required)
1.122     albertel 3358: sub start_del {
                   3359:     my ($target,$token) = @_;
                   3360:     my $currentstring = '';
                   3361:     if ($target eq 'web') {
                   3362: 	$currentstring = $token->[4];     
                   3363:     } 
                   3364:     return $currentstring;
                   3365: }
                   3366: 
                   3367: sub end_del {
                   3368:     my ($target,$token) = @_;
                   3369:     my $currentstring = '';
                   3370:     if ($target eq 'web') {
                   3371: 	$currentstring = $token->[2];    
                   3372:     } 
                   3373:     return $currentstring;
                   3374: }
                   3375: 
1.181     sakharuk 3376: #-- <fieldset> tag (end tag required)
1.122     albertel 3377: sub start_fieldset {
                   3378:     my ($target,$token) = @_;
                   3379:     my $currentstring = '';
                   3380:     if ($target eq 'web') {
                   3381: 	$currentstring = $token->[4];     
                   3382:     } 
                   3383:     return $currentstring;
                   3384: }
                   3385: 
                   3386: sub end_fieldset {
                   3387:     my ($target,$token) = @_;
                   3388:     my $currentstring = '';
                   3389:     if ($target eq 'web') {
                   3390: 	$currentstring = $token->[2];    
                   3391:     } 
                   3392:     return $currentstring;
                   3393: }
                   3394: 
1.181     sakharuk 3395: #-- <frame> tag (end tag forbidden)
1.122     albertel 3396: sub start_frame {
                   3397:     my ($target,$token) = @_;
                   3398:     my $currentstring = '';
                   3399:     if ($target eq 'web') {
                   3400: 	$currentstring = $token->[4];     
                   3401:     } 
                   3402:     return $currentstring;
                   3403: }
                   3404: 
                   3405: sub end_frame {
                   3406:     my ($target,$token) = @_;
                   3407:     my $currentstring = '';
                   3408:     if ($target eq 'web') {
                   3409: 	$currentstring = $token->[2];    
                   3410:     } 
                   3411:     return $currentstring;
                   3412: }
                   3413: 
1.181     sakharuk 3414: #-- <iframe> tag (end tag required)
1.122     albertel 3415: sub start_iframe {
                   3416:     my ($target,$token) = @_;
                   3417:     my $currentstring = '';
                   3418:     if ($target eq 'web') {
                   3419: 	$currentstring = $token->[4];     
                   3420:     } 
                   3421:     return $currentstring;
                   3422: }
                   3423: 
                   3424: sub end_iframe {
                   3425:     my ($target,$token) = @_;
                   3426:     my $currentstring = '';
                   3427:     if ($target eq 'web') {
                   3428: 	$currentstring = $token->[2];    
                   3429:     } 
                   3430:     return $currentstring;
                   3431: }
                   3432: 
1.181     sakharuk 3433: #-- <ins> tag (end tag required)
1.122     albertel 3434: sub start_ins {
                   3435:     my ($target,$token) = @_;
                   3436:     my $currentstring = '';
                   3437:     if ($target eq 'web') {
                   3438: 	$currentstring = $token->[4];     
                   3439:     } 
                   3440:     return $currentstring;
                   3441: }
                   3442: 
                   3443: sub end_ins {
                   3444:     my ($target,$token) = @_;
                   3445:     my $currentstring = '';
                   3446:     if ($target eq 'web') {
                   3447: 	$currentstring = $token->[2];    
                   3448:     } 
                   3449:     return $currentstring;
                   3450: }
                   3451: 
1.181     sakharuk 3452: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3453: sub start_isindex {
                   3454:     my ($target,$token) = @_;
                   3455:     my $currentstring = '';
                   3456:     if ($target eq 'web') {
                   3457: 	$currentstring = $token->[4];     
                   3458:     } 
                   3459:     return $currentstring;
                   3460: }
                   3461: 
                   3462: sub end_isindex {
                   3463:     my ($target,$token) = @_;
                   3464:     my $currentstring = '';
                   3465:     if ($target eq 'web') {
                   3466: 	$currentstring = $token->[2];    
                   3467:     } 
                   3468:     return $currentstring;
                   3469: }
                   3470: 
1.181     sakharuk 3471: #-- <keygen> tag (end tag forbidden)
1.122     albertel 3472: sub start_keygen {
                   3473:     my ($target,$token) = @_;
                   3474:     my $currentstring = '';
                   3475:     if ($target eq 'web') {
                   3476: 	$currentstring = $token->[4];     
                   3477:     } 
                   3478:     return $currentstring;
                   3479: }
                   3480: 
                   3481: sub end_keygen {
                   3482:     my ($target,$token) = @_;
                   3483:     my $currentstring = '';
                   3484:     if ($target eq 'web') {
                   3485: 	$currentstring = $token->[2];    
                   3486:     } 
                   3487:     return $currentstring;
                   3488: }
                   3489: 
                   3490: #-- <label> tag
                   3491: sub start_label {
                   3492:     my ($target,$token) = @_;
                   3493:     my $currentstring = '';
                   3494:     if ($target eq 'web') {
                   3495: 	$currentstring = $token->[4];     
                   3496:     } 
                   3497:     return $currentstring;
                   3498: }
                   3499: 
                   3500: sub end_label {
                   3501:     my ($target,$token) = @_;
                   3502:     my $currentstring = '';
                   3503:     if ($target eq 'web') {
                   3504: 	$currentstring = $token->[2];    
                   3505:     } 
                   3506:     return $currentstring;
                   3507: }
                   3508: 
1.181     sakharuk 3509: #-- <layer> tag (end tag required)
1.122     albertel 3510: sub start_layer {
                   3511:     my ($target,$token) = @_;
                   3512:     my $currentstring = '';
                   3513:     if ($target eq 'web') {
                   3514: 	$currentstring = $token->[4];     
                   3515:     } 
                   3516:     return $currentstring;
                   3517: }
                   3518: 
                   3519: sub end_layer {
                   3520:     my ($target,$token) = @_;
                   3521:     my $currentstring = '';
                   3522:     if ($target eq 'web') {
                   3523: 	$currentstring = $token->[2];    
                   3524:     } 
                   3525:     return $currentstring;
                   3526: }
                   3527: 
1.181     sakharuk 3528: #-- <legend> tag (end tag required)
1.122     albertel 3529: sub start_legend {
                   3530:     my ($target,$token) = @_;
                   3531:     my $currentstring = '';
                   3532:     if ($target eq 'web') {
                   3533: 	$currentstring = $token->[4];     
                   3534:     } 
                   3535:     return $currentstring;
                   3536: }
                   3537: 
                   3538: sub end_legend {
                   3539:     my ($target,$token) = @_;
                   3540:     my $currentstring = '';
                   3541:     if ($target eq 'web') {
                   3542: 	$currentstring = $token->[2];    
                   3543:     } 
                   3544:     return $currentstring;
                   3545: }
                   3546: 
1.181     sakharuk 3547: #-- <link> tag (end tag forbidden)
1.122     albertel 3548: sub start_link {
1.292     albertel 3549:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 3550:     my $currentstring = '';
                   3551:     if ($target eq 'web') {
1.291     albertel 3552: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   3553: 					    undef,1);
                   3554: 	&Apache::lonxml::extlink($href);
1.122     albertel 3555: 	$currentstring = $token->[4];     
                   3556:     } 
                   3557:     return $currentstring;
                   3558: }
                   3559: 
                   3560: sub end_link {
                   3561:     my ($target,$token) = @_;
                   3562:     my $currentstring = '';
                   3563:     if ($target eq 'web') {
                   3564: 	$currentstring = $token->[2];    
                   3565:     } 
                   3566:     return $currentstring;
                   3567: }
                   3568: 
1.181     sakharuk 3569: #-- <marquee> tag (end tag optional)
1.122     albertel 3570: sub start_marquee {
                   3571:     my ($target,$token) = @_;
                   3572:     my $currentstring = '';
                   3573:     if ($target eq 'web') {
                   3574: 	$currentstring = $token->[4];     
                   3575:     } 
                   3576:     return $currentstring;
                   3577: }
                   3578: 
                   3579: sub end_marquee {
                   3580:     my ($target,$token) = @_;
                   3581:     my $currentstring = '';
                   3582:     if ($target eq 'web') {
                   3583: 	$currentstring = $token->[2];    
                   3584:     } 
                   3585:     return $currentstring;
                   3586: }
                   3587: 
1.179     sakharuk 3588: #-- <multicol> tag (end tag required)
                   3589: sub start_multicol {
1.122     albertel 3590:     my ($target,$token) = @_;
1.279     foxr     3591:     my $currentstring = &end_p();	# Close any pending <p>
1.122     albertel 3592:     if ($target eq 'web') {
1.277     foxr     3593: 	$currentstring .= $token->[4];     
1.122     albertel 3594:     } 
                   3595:     return $currentstring;
                   3596: }
                   3597: 
1.179     sakharuk 3598: sub end_multicol {
1.122     albertel 3599:     my ($target,$token) = @_;
                   3600:     my $currentstring = '';
                   3601:     if ($target eq 'web') {
                   3602: 	$currentstring = $token->[2];    
                   3603:     } 
                   3604:     return $currentstring;
                   3605: }
                   3606: 
1.179     sakharuk 3607: #-- <nobr> tag (end tag required)
1.122     albertel 3608: sub start_nobr {
                   3609:     my ($target,$token) = @_;
                   3610:     my $currentstring = '';
                   3611:     if ($target eq 'web') {
                   3612: 	$currentstring = $token->[4];     
1.179     sakharuk 3613:     }  elsif ($target eq 'tex') {
                   3614: 	$currentstring='\mbox{';
                   3615:     }
1.122     albertel 3616:     return $currentstring;
                   3617: }
                   3618: 
                   3619: sub end_nobr {
                   3620:     my ($target,$token) = @_;
                   3621:     my $currentstring = '';
                   3622:     if ($target eq 'web') {
                   3623: 	$currentstring = $token->[2];    
1.179     sakharuk 3624:     }   elsif ($target eq 'tex') {
                   3625: 	$currentstring='}';
                   3626:     }
1.122     albertel 3627:     return $currentstring;
                   3628: }
                   3629: 
1.179     sakharuk 3630: #-- <noembed> tag (end tag required)
1.122     albertel 3631: sub start_noembed {
                   3632:     my ($target,$token) = @_;
                   3633:     my $currentstring = '';
                   3634:     if ($target eq 'web') {
                   3635: 	$currentstring = $token->[4];     
                   3636:     } 
                   3637:     return $currentstring;
                   3638: }
                   3639: 
                   3640: sub end_noembed {
                   3641:     my ($target,$token) = @_;
                   3642:     my $currentstring = '';
                   3643:     if ($target eq 'web') {
                   3644: 	$currentstring = $token->[2];    
                   3645:     } 
                   3646:     return $currentstring;
                   3647: }
                   3648: 
1.179     sakharuk 3649: #-- <noframes> tag (end tag required)
1.122     albertel 3650: sub start_noframes {
                   3651:     my ($target,$token) = @_;
                   3652:     my $currentstring = '';
                   3653:     if ($target eq 'web') {
                   3654: 	$currentstring = $token->[4];     
                   3655:     } 
                   3656:     return $currentstring;
                   3657: }
                   3658: 
                   3659: sub end_noframes {
                   3660:     my ($target,$token) = @_;
                   3661:     my $currentstring = '';
                   3662:     if ($target eq 'web') {
                   3663: 	$currentstring = $token->[2];    
                   3664:     } 
                   3665:     return $currentstring;
                   3666: }
                   3667: 
1.179     sakharuk 3668: #-- <nolayer> tag (end tag required)
1.122     albertel 3669: sub start_nolayer {
                   3670:     my ($target,$token) = @_;
                   3671:     my $currentstring = '';
                   3672:     if ($target eq 'web') {
                   3673: 	$currentstring = $token->[4];     
                   3674:     } 
                   3675:     return $currentstring;
                   3676: }
                   3677: 
                   3678: sub end_nolayer {
                   3679:     my ($target,$token) = @_;
                   3680:     my $currentstring = '';
                   3681:     if ($target eq 'web') {
                   3682: 	$currentstring = $token->[2];    
                   3683:     } 
                   3684:     return $currentstring;
                   3685: }
                   3686: 
1.179     sakharuk 3687: #-- <noscript> tag (end tag required)
1.122     albertel 3688: sub start_noscript {
                   3689:     my ($target,$token) = @_;
                   3690:     my $currentstring = '';
                   3691:     if ($target eq 'web') {
                   3692: 	$currentstring = $token->[4];     
                   3693:     } 
                   3694:     return $currentstring;
                   3695: }
                   3696: 
                   3697: sub end_noscript {
                   3698:     my ($target,$token) = @_;
                   3699:     my $currentstring = '';
                   3700:     if ($target eq 'web') {
                   3701: 	$currentstring = $token->[2];    
                   3702:     } 
                   3703:     return $currentstring;
                   3704: }
                   3705: 
1.179     sakharuk 3706: #-- <object> tag (end tag required)
1.122     albertel 3707: sub start_object {
                   3708:     my ($target,$token) = @_;
                   3709:     my $currentstring = '';
                   3710:     if ($target eq 'web') {
                   3711: 	$currentstring = $token->[4];     
                   3712:     } 
                   3713:     return $currentstring;
                   3714: }
                   3715: 
                   3716: sub end_object {
                   3717:     my ($target,$token) = @_;
                   3718:     my $currentstring = '';
                   3719:     if ($target eq 'web') {
                   3720: 	$currentstring = $token->[2];    
                   3721:     } 
                   3722:     return $currentstring;
                   3723: }
                   3724: 
1.179     sakharuk 3725: #-- <optgroup> tag (end tag required)
1.122     albertel 3726: sub start_optgroup {
                   3727:     my ($target,$token) = @_;
                   3728:     my $currentstring = '';
                   3729:     if ($target eq 'web') {
                   3730: 	$currentstring = $token->[4];     
                   3731:     } 
                   3732:     return $currentstring;
                   3733: }
                   3734: 
                   3735: sub end_optgroup {
                   3736:     my ($target,$token) = @_;
                   3737:     my $currentstring = '';
                   3738:     if ($target eq 'web') {
                   3739: 	$currentstring = $token->[2];    
                   3740:     } 
                   3741:     return $currentstring;
                   3742: }
                   3743: 
1.179     sakharuk 3744: #-- <samp> tag (end tag required)
1.122     albertel 3745: sub start_samp {
                   3746:     my ($target,$token) = @_;
                   3747:     my $currentstring = '';
                   3748:     if ($target eq 'web') {
                   3749: 	$currentstring = $token->[4];     
1.179     sakharuk 3750:     } elsif ($target eq 'tex') {
                   3751: 	$currentstring='\texttt{';
                   3752:     }
1.122     albertel 3753:     return $currentstring;
                   3754: }
                   3755: 
                   3756: sub end_samp {
                   3757:     my ($target,$token) = @_;
                   3758:     my $currentstring = '';
                   3759:     if ($target eq 'web') {
                   3760: 	$currentstring = $token->[2];    
1.179     sakharuk 3761:     } elsif ($target eq 'tex') {
                   3762: 	$currentstring='}';
                   3763:     }
1.122     albertel 3764:     return $currentstring;
                   3765: }
                   3766: 
                   3767: #-- <server> tag
                   3768: sub start_server {
                   3769:     my ($target,$token) = @_;
                   3770:     my $currentstring = '';
                   3771:     if ($target eq 'web') {
                   3772: 	$currentstring = $token->[4];     
                   3773:     } 
                   3774:     return $currentstring;
                   3775: }
                   3776: 
                   3777: sub end_server {
                   3778:     my ($target,$token) = @_;
                   3779:     my $currentstring = '';
                   3780:     if ($target eq 'web') {
                   3781: 	$currentstring = $token->[2];    
                   3782:     } 
                   3783:     return $currentstring;
                   3784: }
                   3785: 
1.179     sakharuk 3786: #-- <spacer> tag (end tag forbidden)
1.122     albertel 3787: sub start_spacer {
                   3788:     my ($target,$token) = @_;
1.279     foxr     3789:     my $currentstring = &end_p();	# Close off any open <p> tag.
1.122     albertel 3790:     if ($target eq 'web') {
1.277     foxr     3791: 	$currentstring .= $token->[4];     
1.122     albertel 3792:     } 
                   3793:     return $currentstring;
                   3794: }
                   3795: 
                   3796: sub end_spacer {
                   3797:     my ($target,$token) = @_;
                   3798:     my $currentstring = '';
                   3799:     if ($target eq 'web') {
                   3800: 	$currentstring = $token->[2];    
                   3801:     } 
                   3802:     return $currentstring;
                   3803: }
                   3804: 
1.179     sakharuk 3805: #-- <span> tag (end tag required)
1.122     albertel 3806: sub start_span {
                   3807:     my ($target,$token) = @_;
                   3808:     my $currentstring = '';
                   3809:     if ($target eq 'web') {
                   3810: 	$currentstring = $token->[4];     
                   3811:     } 
                   3812:     return $currentstring;
                   3813: }
                   3814: 
                   3815: sub end_span {
                   3816:     my ($target,$token) = @_;
                   3817:     my $currentstring = '';
                   3818:     if ($target eq 'web') {
                   3819: 	$currentstring = $token->[2];    
                   3820:     } 
                   3821:     return $currentstring;
                   3822: }
                   3823: 
1.179     sakharuk 3824: #-- <tbody> tag (end tag optional)
1.122     albertel 3825: sub start_tbody {
                   3826:     my ($target,$token) = @_;
                   3827:     my $currentstring = '';
                   3828:     if ($target eq 'web') {
                   3829: 	$currentstring = $token->[4];     
                   3830:     } 
                   3831:     return $currentstring;
                   3832: }
                   3833: 
                   3834: sub end_tbody {
                   3835:     my ($target,$token) = @_;
                   3836:     my $currentstring = '';
                   3837:     if ($target eq 'web') {
                   3838: 	$currentstring = $token->[2];    
                   3839:     } 
                   3840:     return $currentstring;
                   3841: }
                   3842: 
1.166     sakharuk 3843: #-- <tfoot> tag (end tag optional)
1.122     albertel 3844: sub start_tfoot {
                   3845:     my ($target,$token) = @_;
                   3846:     my $currentstring = '';
                   3847:     if ($target eq 'web') {
                   3848: 	$currentstring = $token->[4];     
                   3849:     } 
                   3850:     return $currentstring;
                   3851: }
                   3852: 
                   3853: sub end_tfoot {
                   3854:     my ($target,$token) = @_;
                   3855:     my $currentstring = '';
                   3856:     if ($target eq 'web') {
                   3857: 	$currentstring = $token->[2];    
                   3858:     } 
                   3859:     return $currentstring;
                   3860: }
                   3861: 
1.166     sakharuk 3862: #-- <thead> tag (end tag optional)
1.122     albertel 3863: sub start_thead {
                   3864:     my ($target,$token) = @_;
                   3865:     my $currentstring = '';
                   3866:     if ($target eq 'web') {
                   3867: 	$currentstring = $token->[4];     
                   3868:     } 
                   3869:     return $currentstring;
                   3870: }
1.10      www      3871: 
1.122     albertel 3872: sub end_thead {
                   3873:     my ($target,$token) = @_;
                   3874:     my $currentstring = '';
                   3875:     if ($target eq 'web') {
                   3876: 	$currentstring = $token->[2];    
                   3877:     } 
                   3878:     return $currentstring;
                   3879: }
1.119     www      3880: 
1.122     albertel 3881: #-- <var> tag
                   3882: sub start_var {
1.44      sakharuk 3883:     my ($target,$token) = @_;
                   3884:     my $currentstring = '';
                   3885:     if ($target eq 'web') {
1.122     albertel 3886: 	$currentstring = $token->[4];     
1.163     sakharuk 3887:     } elsif ($target eq 'tex') {
                   3888: 	$currentstring = '\textit{'; 
                   3889:     }
1.44      sakharuk 3890:     return $currentstring;
                   3891: }
1.10      www      3892: 
1.122     albertel 3893: sub end_var {
                   3894:     my ($target,$token) = @_;
1.44      sakharuk 3895:     my $currentstring = '';
                   3896:     if ($target eq 'web') {
1.163     sakharuk 3897: 	$currentstring = $token->[2];
                   3898:     } elsif ($target eq 'tex') {
                   3899: 	$currentstring = '}'; 
1.44      sakharuk 3900:     } 
                   3901:     return $currentstring;
                   3902: }
1.119     www      3903: 
1.163     sakharuk 3904: #-- <wbr> tag (end tag forbidden)
1.122     albertel 3905: sub start_wbr {
                   3906:     my ($target,$token) = @_;
                   3907:     my $currentstring = '';
                   3908:     if ($target eq 'web') {
                   3909: 	$currentstring = $token->[4];     
                   3910:     } 
                   3911:     return $currentstring;
1.98      albertel 3912: }
                   3913: 
1.122     albertel 3914: sub end_wbr {
                   3915:     my ($target,$token) = @_;
                   3916:     my $currentstring = '';
                   3917:     if ($target eq 'web') {
                   3918: 	$currentstring = $token->[2];    
                   3919:     } 
                   3920:     return $currentstring;
1.98      albertel 3921: }
1.134     sakharuk 3922: 
                   3923: #-- <hideweboutput> tag
                   3924: sub start_hideweboutput {
                   3925:     my ($target,$token) = @_;
                   3926:     if ($target eq 'web') {
                   3927: 	&Apache::lonxml::startredirection();     
                   3928:     } 
                   3929:     return '';
                   3930: }
                   3931: 
                   3932: sub end_hideweboutput {
                   3933:     my ($target,$token) = @_;
                   3934:     my $currentstring = '';
                   3935:     if ($target eq 'web') {
                   3936: 	$currentstring = &Apache::lonxml::endredirection();    
                   3937:     } 
                   3938:     return '';
                   3939: }
                   3940: 
1.94      sakharuk 3941: 
                   3942: sub image_replication {
                   3943:     my $src = shift;
1.187     albertel 3944:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   3945:     #replicates eps or ps 
                   3946:     my $epssrc = my $pssrc = $src;
                   3947:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   3948:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   3949:     if (not -e $epssrc && not -e $pssrc) {
                   3950: 	my $result=&Apache::lonnet::repcopy($epssrc);
1.264     raeburn  3951: 	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 3952:     }
                   3953:     return '';
1.195     sakharuk 3954: }
1.275     foxr     3955: #
                   3956: #   Get correct sizing parameter for an image given
                   3957: #   it's initial ht. and wid.  This allows sizing of
                   3958: #   images that are generated on-the-fly (e.g. gnuplot)
                   3959: #   as well as serving as a utility for image_size.
                   3960: # 
                   3961: #  Parameter:
                   3962: #        height_param
                   3963: #        width_param    - Initial picture dimensions.
                   3964: #        scaling        - A scale factor.
                   3965: #        parstack,      - the current stack of tag attributes 
                   3966: #                         from the xml parser
                   3967: #        safeeval,      - pointer to the safespace
                   3968: #        depth,         - from what level in the stack to look for attributes
                   3969: #                         (assumes -1 if unspecified)
                   3970: #        cis            - look for attrubutes case insensitively
                   3971: #                         (assumes false)
                   3972: #
                   3973: # Returns:
                   3974: #   height, width   - new dimensions.
                   3975: #
                   3976: sub resize_image {
                   3977:     my ($height_param, $width_param, $scaling,
                   3978: 	$parstack, $safeeval, $depth, $cis) = @_;
                   3979: 
                   3980:     # First apply the scaling...
1.271     foxr     3981: 
1.275     foxr     3982:     $height_param = $height_param * $scaling;
                   3983:     $width_param  = $width_param  * $scaling;
1.261     foxr     3984: 
1.197     sakharuk 3985:     #do we have any specified LaTeX size of the picture?
1.261     foxr     3986:     my $toget='TeXwidth'; 
                   3987:     if ($cis) { 
                   3988: 	$toget=lc($toget); 
                   3989:     }
1.256     albertel 3990:     my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
                   3991: 					      $safeeval,$depth,$cis);
                   3992:     $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
                   3993:     my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
                   3994: 					       $safeeval,$depth,$cis);
1.197     sakharuk 3995:     #do we have any specified web size of the picture?
                   3996:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
1.256     albertel 3997: 					   $depth,1);
                   3998:     if ($TeXwidth) { 
1.252     matthew  3999: 	my $old_width_param=$width_param;
1.197     sakharuk 4000: 	if ($TeXwidth=~/(\d+)\s*\%/) {
1.267     albertel 4001: 	    $width_param = $1*$env{'form.textwidth'}/100;
1.197     sakharuk 4002: 	} else { 
                   4003: 	    $width_param = $TeXwidth;
                   4004: 	}
1.266     albertel 4005: 	if ($TeXheight) {
                   4006: 	    $height_param = $TeXheight;
                   4007: 	} elsif ($old_width_param) {
                   4008: 	    $height_param=$TeXwidth/$old_width_param*$height_param;
                   4009: 	}
1.256     albertel 4010:     } elsif ($TeXheight) {
1.248     foxr     4011: 	$height_param = $TeXheight;
1.266     albertel 4012: 	if ($height_param) {
                   4013: 	    $width_param  = $TeXheight/$height_param*$width_param;
                   4014: 	}
1.256     albertel 4015:     } elsif ($width) {
1.252     matthew  4016: 	my $old_width_param=$width_param;
1.256     albertel 4017: 	$width_param = $width*$scaling;
1.266     albertel 4018: 	if ($old_width_param) {
                   4019: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4020: 	}
1.252     matthew  4021:     }
1.267     albertel 4022:     if ($width_param > $env{'form.textwidth'}) {
1.252     matthew  4023:         my $old_width_param=$width_param;
1.267     albertel 4024: 	$width_param =0.95*$env{'form.textwidth'};
1.266     albertel 4025: 	if ($old_width_param) {
                   4026: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4027: 	}
1.197     sakharuk 4028:     }
1.275     foxr     4029: 
                   4030:     return ($height_param, $width_param);
                   4031: }
                   4032: 
                   4033: sub image_size {
                   4034:     my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
                   4035: 
                   4036:     #size of image from gif/jpg/jpeg/png 
                   4037:     my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   4038:     if (-e $ressrc) {
                   4039: 	$src = $ressrc;
                   4040:     }
                   4041:     my $image = Image::Magick->new;
                   4042:     my $current_figure = $image->Read($src);
                   4043:     my $width_param = $image->Get('width');
                   4044:     my $height_param = $image->Get('height');
                   4045:     &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
                   4046:     undef($image);
                   4047: 
                   4048:     ($height_param, $width_param) = &resize_image($height_param, $width_param,
                   4049: 						  $scaling, $parstack, $safeeval, 
                   4050: 						  $depth, $cis);
                   4051: 
1.248     foxr     4052:     return ($height_param, $width_param);
                   4053: }
                   4054: 
                   4055: sub image_width {
                   4056:     my ($height, $width) = &image_size(@_);
                   4057:     return $width;
                   4058: }
                   4059: #  Not yet 100% sure this is correct in all circumstances..
                   4060: #  due to my uncertainty about mods to image_size.
                   4061: #
                   4062: sub image_height {
                   4063:     my ($height, $width) = &image_size(@_);
                   4064:     return $height;
1.197     sakharuk 4065: }
                   4066: 
1.256     albertel 4067: sub get_eps_image {
                   4068:     my ($src)=@_;
1.261     foxr     4069:     my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
1.285     foxr     4070: 
                   4071:     # In order to prevent the substitution of the alt text, we need to
                   4072:     # be sure the orig_src file is on system now so:
                   4073: 
                   4074:     if (! -e $orig_src) {
                   4075: 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
                   4076:     }
1.275     foxr     4077:     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
1.282     foxr     4078:     my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
1.256     albertel 4079:     $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
                   4080:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.275     foxr     4081:     &Apache::lonxml::debug("Filelocation gives: $src");
1.256     albertel 4082:     if (! -e $src) {
1.261     foxr     4083: 	&Apache::lonxml::debug("$src does not exist");
1.264     raeburn  4084: 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
1.261     foxr     4085: 	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
1.256     albertel 4086: 	    #if replication failed try to find ps file
                   4087: 	    $src=~s/\.eps$/\.ps/;
1.261     foxr     4088: 	    &Apache::lonxml::debug("Now looking for $src");
1.270     foxr     4089: 	    #if no ps file try to replicate it.
                   4090: 	    my $didrepcopy = &Apache::lonnet::repcopy($src);
                   4091: 	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
                   4092: 	    if ( (not -e $src) ||
                   4093: 		($didrepcopy ne 'ok')) {
1.261     foxr     4094: 		&Apache::lonxml::debug("Failed to find or replicate $src");
                   4095: 
1.256     albertel 4096: 		#if replication failed try to produce eps file dynamically
                   4097: 		$src=~s/\.ps$/\.eps/;
                   4098: 		my $temp_file;
1.267     albertel 4099: 		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.256     albertel 4100: 		my $newsrc=$orig_src;
                   4101: 		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
1.275     foxr     4102: 		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
1.256     albertel 4103: 		print FILE "$newsrc\n";
1.261     foxr     4104: 		close FILE;
1.256     albertel 4105: 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4106: 		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.283     albertel 4107: 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
                   4108: 		    $src =~ s/\.eps$/$sext.eps/;
                   4109: 		}
1.256     albertel 4110: 	    }
                   4111: 	}
                   4112:     }
                   4113:     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
1.261     foxr     4114:     &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
1.256     albertel 4115:     return ($path.'/',$file);
                   4116: }
                   4117: 
1.195     sakharuk 4118: sub eps_generation {
                   4119:     my ($src,$file,$width_param) = @_;	     
1.267     albertel 4120:     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
1.195     sakharuk 4121:     my $temp_file = Apache::File->new('>>'.$filename); 
                   4122:     print $temp_file "$src\n";
                   4123:     my $newsrc = $src;
                   4124:     $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
                   4125:     $newsrc=~s/\/home\/httpd\/html\/res//;
                   4126:     $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
                   4127:     $newsrc=~s/\/\.\//\//;
                   4128:     $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
1.213     sakharuk 4129:     if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
                   4130: 	$newsrc=~s/\/home\/httpd\/lonUsers//;
                   4131: 	$newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
                   4132:     }
1.239     sakharuk 4133:     if ($newsrc=~/\/userfiles\//) {
                   4134: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4135:     } else {
                   4136: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4137:     }
1.197     sakharuk 4138: }
                   4139: 
                   4140: sub file_path {     
                   4141:     my $src=shift;
                   4142:     my ($file,$path); 
                   4143:     if ($src =~ m!(.*)/([^/]*)$!) {
                   4144: 	$file = $2; 
                   4145: 	$path = $1.'/'; 
                   4146:     } 
                   4147:     return $file,$path;
1.126     sakharuk 4148: }
1.294     foxr     4149: #  Converts a measurement in to mm from any of 
                   4150: #  the other valid LaTeX units of measure.
                   4151: #  If the units of measure are missing from the 
                   4152: #  parameter, it is assumed to be in and returned
                   4153: #  with mm units of measure
1.126     sakharuk 4154: sub recalc {
                   4155:     my $argument = shift;
                   4156:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 4157:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 4158:     my $value=$1;
                   4159:     my $units=$2;
                   4160:     if ($units eq 'cm') {
                   4161: 	$value*=10;
                   4162:     } elsif ($units eq 'in') {
                   4163: 	$value*=25.4;
                   4164:     } elsif ($units eq 'pc') {
                   4165: 	$value*=(25.4*12/72.27);
                   4166:     } elsif ($units eq 'pt') {
                   4167: 	$value*=(25.4/72.27);
                   4168:     }
                   4169:     return $value.' mm';
1.94      sakharuk 4170: }
1.184     sakharuk 4171: 
                   4172: sub LATEX_length {
                   4173:     my $garbage=shift;
1.206     sakharuk 4174:     $garbage=~s/^\s+$//;
                   4175:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   4176:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   4177:     $garbage=~s/(\s)+/$1/;#only one space
                   4178:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   4179:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   4180:     $garbage=~s/([^\\])\$/$1/g;#$
                   4181:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   4182:    $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 4183:     $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;
                   4184:     $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;
                   4185:     $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 4186:     $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;
                   4187:     $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;
                   4188:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   4189:     #remove some other LaTeX command
                   4190:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   4191:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   4192:     $garbage=~s|\+|11|g;
1.184     sakharuk 4193:     my  $value=length($garbage);
                   4194:     return $value;
                   4195: }
                   4196: 
                   4197: 
1.287     foxr     4198: # is_inside_of $tagstack $tag
                   4199: #    This sub returns true if the current state of Xml processing
                   4200: #    is inside of the tag.   
                   4201: # Parameters:
                   4202: #     tagstack   - The tagstack from the parser.
                   4203: #     tag        - The tag (without the <>'s.).
                   4204: # Sample usage:
                   4205: #     if (is_inside_of($tagstack "table")) {
                   4206: #          # I'm in a table....
                   4207: #      }
                   4208: sub is_inside_of {
                   4209:     my ($tagstack, $tag) = @_;
                   4210:     my @stack = @$tagstack;
                   4211:     for (my $i = ($#stack - 1); $i >= 0; $i--) {
                   4212: 	if ($stack[$i] eq $tag) {
                   4213: 	    return 1;
                   4214: 	}
                   4215:     }
                   4216:     return 0;
                   4217: }
1.184     sakharuk 4218: 
1.94      sakharuk 4219: 
1.1       sakharuk 4220: 1;
                   4221: __END__

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