Annotation of loncom/xml/londefdef.pm, revision 1.323

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.323   ! foxr        4: # $Id: londefdef.pm,v 1.322 2006/03/22 19:37:44 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: #}
1.188     albertel   73: sub initialize_londefdef {
                     74:     $Apache::londefdef::TD_redirection=0;
                     75:     @Apache::londefdef::table = ();
                     76:     $Apache::londefdef::select=0;
1.243     albertel   77:     undef(@Apache::londefdef::description);
                     78:     @Apache::londefdef::DD=(0);
                     79:     @Apache::londefdef::DT=(0);
1.244     albertel   80:     @Apache::londefdef::seenDT=(0);
1.238     albertel   81:     $Apache::londefdef::list_index=0;
1.3       sakharuk   82: }
1.1       sakharuk   83: 
1.35      sakharuk   84: #======================= TAG SUBROUTINES =====================
1.8       sakharuk   85: #-- <output>
1.21      albertel   86: sub start_output {
1.122     albertel   87:     my ($target) = @_;
                     88:     if ($target eq 'meta') { $Apache::lonxml::metamode--; }
                     89:     return '';
1.21      albertel   90: }
                     91: sub end_output {
1.122     albertel   92:     my ($target) = @_;
                     93:     if ($target eq 'meta') { $Apache::lonxml::metamode++; }
                     94:     return '';
1.21      albertel   95: }
1.4       sakharuk   96: #-- <m> tag
1.33      albertel   97: sub start_m {
1.190     albertel   98:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel   99:     my $currentstring = '';
1.193     albertel  100:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
1.191     albertel  101:     if ($target eq 'web' || $target eq 'analyze') {
1.122     albertel  102: 	&Apache::lonxml::debug("M is starting with:$inside:");
                    103: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    104: 	if ($eval eq 'on') {
                    105: 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
                    106: 	    #&Apache::lonxml::debug("M is evaulated to:$inside:");
                    107: 	}
1.317     albertel  108: 	my $tex = $inside;
1.276     albertel  109: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                    110: 	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
1.122     albertel  111: 	if ($Apache::lontexconvert::errorstring) {
1.317     albertel  112: 	    my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
                    113: 	    $tex = &HTML::Entities::encode($tex,'<>&"');
                    114: 	    my ($linenumber) =
                    115: 		($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
                    116: 	    if (defined($linenumber)) {
                    117: 		my @tex=split("\n",$tex);
                    118: 		$tex[$linenumber]='<b><font color="red">'.
                    119: 		    $tex[$linenumber].'</font></b>';
                    120: 		$tex=join("\n",@tex);
                    121: 	    }
                    122: 	    &Apache::lonxml::warning($errormsg.$tex.'</pre>');
1.122     albertel  123: 	    $Apache::lontexconvert::errorstring='';
                    124: 	}
                    125: 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
1.178     albertel  126: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  127:     } elsif ($target eq 'tex') {
1.190     albertel  128: 	$currentstring = $inside;
1.178     albertel  129: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    130: 	if ($eval eq 'on') {
                    131: 	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
                    132: 	}
1.122     albertel  133: 	if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
1.257     albertel  134: 	# detect simple math mode entry exits, and convert them
                    135:         # to use \ensuremath
                    136: 	if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
1.293     albertel  137: 	    $currentstring=~s/^(\s*)\$/$1/;
                    138: 	    $currentstring=~s/\$(\s*)$/$1/;
1.257     albertel  139: 	    $currentstring='\ensuremath{'.$currentstring.'}';
                    140: 	}
1.178     albertel  141: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  142:     }
                    143:     return $currentstring;
1.33      albertel  144: }
1.122     albertel  145: 
1.33      albertel  146: sub end_m {
1.122     albertel  147:     my ($target,$token) = @_;
                    148:     my $currentstring = '';
1.204     albertel  149:     if ($target eq 'tex') {
1.122     albertel  150: 	$currentstring = "";
                    151:     }
                    152:     return $currentstring;
1.33      albertel  153: }
1.110     albertel  154: 
                    155: sub start_tthoption {
1.299     albertel  156:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  157:     my $result;
                    158:     if ($target eq 'web') {
1.299     albertel  159: 	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
                    160: 						   $style);
1.122     albertel  161: 	$inside=~s/^\s*//;
1.267     albertel  162: 	if ($env{'browser.mathml'}) {
1.122     albertel  163: 	    &tth::ttmoptions($inside);
                    164: 	} else {
                    165: 	    &tth::tthoptions($inside);
                    166: 	}
                    167:     }
                    168:     return $result;
1.110     albertel  169: }
                    170: 
                    171: sub end_tthoption {
1.122     albertel  172:     my ($target,$token) = @_;
                    173:     my $result;
                    174:     return $result;
1.110     albertel  175: }
                    176: 
1.181     sakharuk  177: #-- <html> tag (end tag optional)
1.100     albertel  178: sub start_html {
                    179:     my ($target,$token) = @_;
                    180:     my $currentstring = '';
1.267     albertel  181:     my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
1.196     albertel  182:     &Apache::lontexconvert::init_tth();
1.269     albertel  183:     if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
1.242     albertel  184: 	$currentstring = &Apache::lonxml::xmlbegin();
1.100     albertel  185:     } elsif ($target eq 'tex') {
1.307     foxr      186: 	$currentstring .= '\documentclass[letterpaper,twoside]{article}';
1.267     albertel  187: 	if (($env{'form.latex_type'}=~'batchmode') ||
                    188:             (!$env{'request.role.adv'})) {$currentstring .='\batchmode';} 
1.217     sakharuk  189: 	$currentstring .= '\newcommand{\keephidden}[1]{}'.
                    190:                           '\renewcommand{\deg}{$^{\circ}$}'.
1.306     foxr      191: 			  '\usepackage{multirow}'.
1.217     sakharuk  192:                           '\usepackage{longtable}'.
                    193:                           '\usepackage{textcomp}'.
                    194:                           '\usepackage{makeidx}'.
                    195:                           '\usepackage[dvips]{graphicx}'.
1.286     foxr      196: 			  '\usepackage{wrapfig}'.
1.248     foxr      197: 			  '\usepackage{picins}'.
1.217     sakharuk  198:                           '\usepackage{epsfig}'.
                    199:                           '\usepackage{calc}'.
                    200:                           '\usepackage{amsmath}'.
                    201:                           '\usepackage{amssymb}'.
                    202:                           '\usepackage{amsfonts}'.
                    203:                           '\usepackage{amsthm}'.
                    204:                           '\usepackage{amscd}'.
                    205:                           '\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}}'.
                    206:                           '\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  207:     }
                    208:     return $currentstring;
                    209: }
1.122     albertel  210: 
                    211: sub end_html {
1.232     sakharuk  212:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  213:     my $currentstring = '';
                    214:     if ($target eq 'web') {
1.259     albertel  215: 	$currentstring = '</html>';
1.122     albertel  216:     }
                    217:     return $currentstring;
                    218: }
                    219: 
1.181     sakharuk  220: #-- <head> tag (end tag optional)
1.122     albertel  221: sub start_head {
                    222:     my ($target,$token) = @_;
                    223:     my $currentstring = '';
                    224:     if ($target eq 'web') {
1.242     albertel  225: 	$currentstring = $token->[4].&Apache::lonxml::fontsettings();
1.122     albertel  226:     } 
                    227:     return $currentstring;
                    228: }
                    229: 
                    230: sub end_head {
                    231:     my ($target,$token) = @_;
                    232:     my $currentstring = '';
1.267     albertel  233:     if ($target eq 'web' && $env{'request.state'} eq 'published') {
1.122     albertel  234: 	$currentstring = &Apache::lonmenu::registerurl(undef,$target).
                    235: 	    $token->[2];    
                    236:     } 
                    237:     return $currentstring;
                    238: }
                    239: 
1.181     sakharuk  240: #-- <map> tag (end tag required)
1.122     albertel  241: sub start_map {
                    242:     my ($target,$token) = @_;
                    243:     my $currentstring = '';
                    244:     if ($target eq 'web') {
                    245: 	$currentstring = $token->[4];     
                    246:     } 
                    247:     return $currentstring;
                    248: }
                    249: 
                    250: sub end_map {
                    251:     my ($target,$token) = @_;
                    252:     my $currentstring = '';
                    253:     if ($target eq 'web') {
                    254: 	$currentstring = $token->[2];    
                    255:     } 
                    256:     return $currentstring;
                    257: }
                    258: 
1.181     sakharuk  259: #-- <select> tag (end tag required)
1.122     albertel  260: sub start_select {
                    261:     my ($target,$token) = @_;
                    262:     my $currentstring = '';
                    263:     if ($target eq 'web') {
                    264: 	$currentstring = $token->[4];     
1.181     sakharuk  265:     }  elsif ($target eq 'tex') {
                    266: 	$Apache::londefdef::select=0;
                    267:     }
1.122     albertel  268:     return $currentstring;
                    269: }
                    270: 
                    271: sub end_select {
                    272:     my ($target,$token) = @_;
                    273:     my $currentstring = '';
                    274:     if ($target eq 'web') {
                    275: 	$currentstring = $token->[2];    
                    276:     } 
                    277:     return $currentstring;
                    278: }
                    279: 
1.181     sakharuk  280: #-- <option> tag (end tag optional)
1.122     albertel  281: sub start_option {
1.181     sakharuk  282:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  283:     my $currentstring = '';
                    284:     if ($target eq 'web') {
                    285: 	$currentstring = $token->[4];     
1.181     sakharuk  286:     } elsif ($target eq 'tex') {
                    287: 	$Apache::londefdef::select++;
                    288: 	if ($Apache::londefdef::select == 1) {
                    289: 	    $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
                    290: 	} else {
                    291: 	    $currentstring='\keephidden{';
                    292: 	}
                    293:     }
1.122     albertel  294:     return $currentstring;
                    295: }
                    296: 
                    297: sub end_option {
                    298:     my ($target,$token) = @_;
                    299:     my $currentstring = '';
                    300:     if ($target eq 'web') {
                    301: 	$currentstring = $token->[2];    
1.181     sakharuk  302:     }  elsif ($target eq 'tex') {
                    303: 	$currentstring='}';
                    304:     }
1.122     albertel  305:     return $currentstring;
                    306: }
                    307: 
1.181     sakharuk  308: #-- <input> tag (end tag forbidden)
1.122     albertel  309: sub start_input {
                    310:     my ($target,$token) = @_;
                    311:     my $currentstring = '';
                    312:     if ($target eq 'web') {
                    313: 	$currentstring = $token->[4];     
                    314:     } 
                    315:     return $currentstring;
                    316: }
                    317: 
                    318: sub end_input {
                    319:     my ($target,$token) = @_;
                    320:     my $currentstring = '';
                    321:     if ($target eq 'web') {
                    322: 	$currentstring = $token->[2];    
                    323:     } 
                    324:     return $currentstring;
                    325: }
                    326: 
1.181     sakharuk  327: #-- <textarea> tag (end tag required)
1.122     albertel  328: sub start_textarea {
                    329:     my ($target,$token) = @_;
                    330:     my $currentstring = '';
                    331:     if ($target eq 'web') {
                    332: 	$currentstring = $token->[4];     
                    333:     } 
                    334:     return $currentstring;
                    335: }
                    336: 
                    337: sub end_textarea {
                    338:     my ($target,$token) = @_;
                    339:     my $currentstring = '';
                    340:     if ($target eq 'web') {
                    341: 	$currentstring = $token->[2];    
                    342:     } 
                    343:     return $currentstring;
                    344: }
                    345: 
1.181     sakharuk  346: #-- <form> tag (end tag required)
1.122     albertel  347: sub start_form {
                    348:     my ($target,$token) = @_;
                    349:     my $currentstring = '';
                    350:     if ($target eq 'web') {
                    351: 	$currentstring = $token->[4];     
                    352:     } 
                    353:     return $currentstring;
                    354: }
                    355: 
                    356: sub end_form {
                    357:     my ($target,$token) = @_;
                    358:     my $currentstring = '';
                    359:     if ($target eq 'web') {
                    360: 	$currentstring = $token->[2];    
                    361:     } 
                    362:     return $currentstring;
                    363: }
                    364: 
1.181     sakharuk  365: #-- <title> tag (end tag required)
1.122     albertel  366: sub start_title {
                    367:     my ($target,$token) = @_;
                    368:     my $currentstring = '';
                    369:     if ($target eq 'web') {
                    370: 	$currentstring = $token->[4];     
                    371:     } elsif ($target eq 'tex') {
1.166     sakharuk  372: 	$currentstring .= '\keephidden{Title of the document:  ' 
1.122     albertel  373:     }
                    374:     if ($target eq 'meta') {
                    375: 	$currentstring='<title>';
1.185     albertel  376: 	&start_output($target);
1.122     albertel  377:     }
                    378:     return $currentstring;
                    379: }
                    380: 
                    381: sub end_title {
                    382:     my ($target,$token) = @_;
                    383:     my $currentstring = '';
                    384:     if ($target eq 'web') {
                    385: 	$currentstring = $token->[2];    
                    386:     } elsif ($target eq 'tex') {
                    387: 	$currentstring .= '}';
                    388:     }  
                    389:     if ($target eq 'meta') {
1.185     albertel  390: 	&end_output($target);
1.122     albertel  391: 	$currentstring='</title>';
                    392:     } 
                    393:     return $currentstring;
                    394: }
                    395: 
1.181     sakharuk  396: #-- <meta> tag (end tag forbidden)
1.122     albertel  397: sub start_meta {
1.299     albertel  398:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  399:     my $currentstring = '';
                    400:     if ($target eq 'web') {
                    401: 	my $args='';
                    402: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    403: 	if ($args eq '') {
1.299     albertel  404: 	    &Apache::lonxml::get_all_text("/meta",$parser,$style);
1.122     albertel  405: 	} else {
                    406: 	    $currentstring = $token->[4];
1.1       sakharuk  407: 	}
1.135     sakharuk  408:     } elsif ($target eq 'meta') {
1.122     albertel  409: 	unless (&Apache::lonxml::get_param
                    410: 		('http-equiv',$parstack,$safeeval,undef,1)) {
                    411: 	    my $name=$token->[2]->{'name'};
                    412: 	    $name=~tr/A-Z/a-z/;
                    413: 	    $name=~s/\s/\_/gs;
                    414: 	    $name=~s/\W//gs;
                    415: 	    if ($name) {
1.154     www       416: 		$currentstring='<'.$name;
                    417:                  my $display=&Apache::lonxml::get_param
                    418: 		('display',$parstack,$safeeval,undef,1);
                    419:                 if ($display) {
                    420:                     $display=~s/\"/\'/g;
                    421: 		    $currentstring.=' display="'.$display.'"';
                    422:                 }
                    423: 		$currentstring.='>'.
1.122     albertel  424: 		    &Apache::lonxml::get_param
                    425: 			('content',$parstack,$safeeval,undef,1).
1.135     sakharuk  426: 			'</'.$name.'>';
1.1       sakharuk  427: 	    }
1.154     www       428:             my $display=&Apache::lonxml::get_param
                    429: 		('display',$parstack,$safeeval,undef,1);
                    430:             if ($display) {
1.204     albertel  431: 		$display=&HTML::Entities::encode($display,'<>&"');
1.154     www       432: 		$currentstring.='<'.$name.'.display>'.$display.
                    433:                                '</'.$name.'.display>';
                    434:             }
1.1       sakharuk  435: 	}
1.135     sakharuk  436:     } elsif ($target eq 'tex') {
1.151     sakharuk  437: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    438: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
                    439: 	if ((not defined $content) && (not defined $name)) {
                    440: 	    &Apache::lonxml::startredirection();
                    441: 	}
1.122     albertel  442:     }
                    443:     return $currentstring;
                    444: }
                    445: 
                    446: sub end_meta {
1.165     albertel  447:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  448:     my $currentstring = '';
                    449:     if ($target eq 'web') {
                    450: 	my $args='';
                    451: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    452: 	if ($args ne '') {
1.121     www       453: 	    $currentstring = $token->[4];
1.122     albertel  454: 	}
1.135     sakharuk  455:     } elsif ($target eq 'tex') {
1.165     albertel  456: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    457: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
1.164     albertel  458: 	if ((not defined $content) && (not defined $name)) {
1.169     albertel  459: 	    &Apache::lonxml::endredirection();
1.164     albertel  460: 	}
1.135     sakharuk  461:     }
1.122     albertel  462:     return $currentstring;
                    463: }
                    464: 
1.121     www       465: # accessrule
1.122     albertel  466: sub start_accessrule {
1.299     albertel  467:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  468:     my $currentstring = '';
                    469:     my $eff=&Apache::lonxml::get_param
                    470: 	('effect',$parstack,$safeeval,undef,1);
                    471:     my $realm=&Apache::lonxml::get_param
                    472: 	('realm',$parstack,$safeeval,undef,1);
1.123     www       473:     my $role=&Apache::lonxml::get_param
                    474: 	('role',$parstack,$safeeval,undef,1);
                    475:     $realm=~s/\s+//g;
                    476:     $realm=~s/\//\_/g;
                    477:     $realm=~s/^\_//;
                    478:     $realm=~s/\W/\;/g;
                    479:     $role=~s/\s+//g;
                    480:     $role=~s/\//\_/g;
                    481:     $role=~s/\W/\;/g;
1.122     albertel  482:     if ($target eq 'web') {
                    483: 	my $args='';
                    484: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    485: 	if ($args eq '') {
1.299     albertel  486: 	    &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
1.122     albertel  487: 	} else {
                    488: 	    $currentstring = $token->[4];
                    489: 	}
                    490:     }
                    491:     if ($target eq 'meta') {
1.123     www       492: 	$currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
1.122     albertel  493:     }
                    494:     return $currentstring;
                    495: }
                    496: 
                    497: sub end_accessrule {
                    498:     my ($target,$token,$tagstack,$parstack,$parser) = @_;
                    499:     my $currentstring = '';
                    500:     if ($target eq 'web') {
                    501: 	my $args='';
                    502: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    503: 	if ($args ne '') {
                    504: 	    $currentstring = $token->[4];
                    505: 	}
                    506:     } 
                    507:     return $currentstring;
                    508: }
                    509: 
1.181     sakharuk  510: #-- <body> tag (end tag required)
1.122     albertel  511: sub start_body {
                    512:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    513:     my $currentstring = '';
1.244     albertel  514: 
1.122     albertel  515:     if ($target eq 'web') {
1.170     albertel  516: 	if ($Apache::lonhomework::parsing_a_problem) {
                    517: 	    &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
                    518: 	    return '';
                    519: 	}
1.180     albertel  520: 	if (!$Apache::lonxml::registered && 
1.267     albertel  521: 	    $env{'request.state'} eq 'published') {
1.122     albertel  522: 	    $currentstring.='<head>'.
                    523: 		&Apache::lonmenu::registerurl(undef,$target).'</head>';
                    524: 	}
1.155     www       525: # Accessibility
1.267     albertel  526: 	if ($env{'browser.imagesuppress'} eq 'on') {
1.155     www       527: 	    delete($token->[2]->{'background'});
                    528: 	}
1.267     albertel  529: 	if ($env{'browser.fontenhance'} eq 'on') {
1.155     www       530: 	    my $style='';
                    531: 	    foreach my $key (keys(%{$token->[2]})) {
                    532: 		if ($key =~ /^style$/i) {
                    533: 		    $style.=$token->[2]->{$key}.';';
                    534: 		    delete($token->[2]->{$key});
                    535: 		}
                    536: 	    }
                    537: 	    $token->[2]->{'style'}=$style.'; font-size: x-large;';
                    538: 	}
1.267     albertel  539: 	if ($env{'browser.blackwhite'} eq 'on') {
1.155     www       540: 	    delete($token->[2]->{'font'});
                    541: 	    delete($token->[2]->{'link'});
                    542: 	    delete($token->[2]->{'alink'});
                    543: 	    delete($token->[2]->{'vlink'});
                    544: 	    delete($token->[2]->{'bgcolor'});
                    545: 	    delete($token->[2]->{'background'});
                    546: 	}
                    547: # Overload loads
1.122     albertel  548: 	my $onLoad='';
                    549: 	foreach my $key (keys(%{$token->[2]})) {
                    550: 	    if ($key =~ /^onload$/i) {
                    551: 		$onLoad.=$token->[2]->{$key}.';';
                    552: 		delete($token->[2]->{$key});
1.121     www       553: 	    }
1.122     albertel  554: 	}
                    555: 	$token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
                    556: 	my $onUnload='';
                    557: 	foreach my $key (keys(%{$token->[2]})) {
                    558: 	    if ($key =~ /^onunload$/i) {
                    559: 		$onUnload.=$token->[2]->{$key}.';';
                    560: 		delete($token->[2]->{$key});
1.121     www       561: 	    }
                    562: 	}
1.122     albertel  563: 	$token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
                    564: 	    ';'.$onUnload;
                    565: 	
1.278     www       566: 	$currentstring .= '<'.$token->[1];
1.122     albertel  567: 	foreach (keys %{$token->[2]}) {
                    568: 	    $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
                    569: 	}
1.278     www       570: 	$currentstring.='>';
1.284     albertel  571: 	&Apache::lontexconvert::jsMath_reset();
                    572: 	if ($env{'environment.texengine'} eq 'jsMath') {
                    573: 	    $currentstring.=&Apache::lontexconvert::jsMath_header();
                    574: 	}
1.267     albertel  575: 	if ($env{'request.state'} ne 'published') {
1.278     www       576: 	    if ($env{'environment.remote'} eq 'off') {
                    577: 		$currentstring.= 
                    578: 		    &Apache::lonmenu::constspaceform().
                    579: 		    &Apache::lonmenu::menubuttons(1,'web',1);
                    580: 	    }
1.122     albertel  581: 	    $currentstring.=(<<EDITBUTTON);
1.278     www       582: <form method="post">
                    583: <input type="submit" name="editmode" accesskey="e" value="Edit" />
                    584: </form>
1.40      albertel  585: EDITBUTTON
1.122     albertel  586: 	} else {
                    587: 	    $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
1.1       sakharuk  588: 	}
1.201     albertel  589: 	$currentstring.=&Apache::lonxml::message_location();
1.122     albertel  590:     } elsif ($target eq 'tex') {
                    591: 	$currentstring = '\begin{document}';  
                    592:     } 
                    593:     return $currentstring;
                    594: }
                    595: 
                    596: sub end_body {
1.259     albertel  597:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      598:     my $currentstring = &end_p();	# Close off unclosed <p>
1.122     albertel  599:     if ($target eq 'web') {
1.277     foxr      600: 	$currentstring .= &Apache::lonxml::xmlend($target,$parser);
1.122     albertel  601:     } elsif ($target eq 'tex') {
1.277     foxr      602: 	$currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';  
1.122     albertel  603:     } 
                    604:     return $currentstring;
                    605: }
                    606: 
1.309     albertel  607: # \begin{center} causes a new paragprah spacing that looks odd inside 
                    608: # of a table cell
                    609: sub center_correction { return '\vspace*{-6 mm}'; }
1.181     sakharuk  610: #-- <center> tag (end tag required)
1.122     albertel  611: sub start_center {
1.309     albertel  612:     my ($target,$token,$tagstack) = @_;
1.279     foxr      613:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  614:     if ($target eq 'web') {
1.277     foxr      615: 	$currentstring .= $token->[4];     
1.122     albertel  616:     } elsif ($target eq 'tex') {
1.309     albertel  617: 	if (&is_inside_of($tagstack, "table")) {
                    618: 	    $currentstring .= &center_correction();
                    619: 	}
1.277     foxr      620: 	$currentstring .= '\begin{center}';  
1.144     sakharuk  621:     }
1.122     albertel  622:     return $currentstring;
                    623: }
                    624: 
                    625: sub end_center {
1.309     albertel  626:     my ($target,$token,$tagstack) = @_;
1.122     albertel  627:     my $currentstring = '';
                    628:     if ($target eq 'web') {
                    629: 	$currentstring = $token->[2];     
                    630:     } elsif ($target eq 'tex') {
                    631: 	$currentstring = '\end{center}';  
1.144     sakharuk  632:     }
1.122     albertel  633:     return $currentstring;
                    634: }
                    635: 
1.181     sakharuk  636: #-- <b> tag (end tag required)
1.279     foxr      637: #      NOTE: In TeX mode disables internal <p>
1.122     albertel  638: sub start_b {
                    639:     my ($target,$token) = @_;
                    640:     my $currentstring = '';
                    641:     if ($target eq 'web') {
                    642: 	$currentstring = $token->[4];     
                    643:     } elsif ($target eq 'tex') {
1.279     foxr      644: 	&disable_para();
                    645: 	$currentstring .= '\textbf{';  
1.122     albertel  646:     } 
                    647:     return $currentstring;
                    648: }
                    649: 
                    650: sub end_b {
                    651:     my ($target,$token) = @_;
                    652:     my $currentstring = '';
                    653:     if ($target eq 'web') {
                    654: 	$currentstring = $token->[2];     
                    655:     } elsif ($target eq 'tex') {
1.279     foxr      656: 	&enable_para();
                    657: 	$currentstring = '}';
1.122     albertel  658:     } 
                    659:     return $currentstring;
                    660: }
1.35      sakharuk  661: 
1.181     sakharuk  662: #-- <strong> tag (end tag required)
1.279     foxr      663: #    NOTE: in TeX mode disables internal <p>
1.122     albertel  664: sub start_strong {
                    665:     my ($target,$token) = @_;
                    666:     my $currentstring = '';
                    667:     if ($target eq 'web') {
                    668: 	$currentstring = $token->[4];     
                    669:     } elsif ($target eq 'tex') {
1.279     foxr      670: 	&disable_para();
1.122     albertel  671: 	$currentstring = '\textbf{';  
                    672:     } 
                    673:     return $currentstring;
                    674: }
                    675: 
                    676: sub end_strong {
                    677:     my ($target,$token) = @_;
                    678:     my $currentstring = '';
1.182     sakharuk  679:     if ($target eq 'web') {	
1.122     albertel  680: 	$currentstring = $token->[2];     
                    681:     } elsif ($target eq 'tex') {
1.279     foxr      682: 	&enable_para();
1.122     albertel  683: 	$currentstring = '}';  
1.144     sakharuk  684:     }
1.122     albertel  685:     return $currentstring;
                    686: }
                    687: 
1.181     sakharuk  688: #-- <h1> tag (end tag required)
1.122     albertel  689: sub start_h1 {
1.125     sakharuk  690:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      691:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  692:     if ($target eq 'web') {
                    693: 	$currentstring .= $token->[4];
                    694:     } elsif ($target eq 'tex') {
1.125     sakharuk  695: 	my $pre;
1.199     albertel  696: 	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
1.212     sakharuk  697: 	if ($align eq 'center') {
1.125     sakharuk  698: 	    $pre='\begin{center}';
                    699: 	} elsif ($align eq 'left') {
                    700: 	    $pre='\rlap{';
                    701: 	} elsif ($align eq 'right') {
                    702: 	    $pre=' \hfill \llap{';
                    703: 	}
                    704: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    705: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      706: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  707:     } elsif ($target eq 'meta') {
1.277     foxr      708: 	$currentstring.='<subject>';
1.185     albertel  709: 	&start_output($target);
1.122     albertel  710:     }
                    711:     return $currentstring;
                    712: }
                    713: 
                    714: sub end_h1 {
1.125     sakharuk  715:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  716:     my $currentstring = '';
                    717:     if ($target eq 'web') {
                    718: 	$currentstring .= $token->[2];
                    719:     } elsif ($target eq 'tex') {
1.212     sakharuk  720: 	my $post='\vskip 0 mm ';
1.125     sakharuk  721: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  722: 	if ($align eq 'center') {
1.125     sakharuk  723: 	    $post='\end{center}';
                    724: 	} elsif ($align eq 'left') {
                    725: 	    $post='} \hfill'.'\vskip 0 mm ';
                    726: 	} elsif ($align eq 'right') {
                    727: 	    $post='}'.'\vskip 0 mm ';
                    728: 	}
                    729: 	$currentstring .= '}}'.$post;
1.122     albertel  730:     } elsif ($target eq 'meta') {
1.185     albertel  731: 	&end_output($target);
1.122     albertel  732: 	$currentstring='</subject>';
                    733:     } 
                    734:     return $currentstring;
                    735: }
                    736: 
1.35      sakharuk  737: #-- <h2> tag
1.122     albertel  738: sub start_h2 {
1.125     sakharuk  739:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      740:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  741:     if ($target eq 'web') {
                    742: 	$currentstring .= $token->[4];
                    743:     } elsif ($target eq 'tex') {
1.125     sakharuk  744: 	my $pre;
                    745: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  746: 	if ($align eq 'center') {
1.125     sakharuk  747: 	    $pre='\begin{center}';
                    748: 	} elsif ($align eq 'left') {
                    749: 	    $pre='\rlap{';
                    750: 	} elsif ($align eq 'right') {
                    751: 	    $pre=' \hfill \llap{';
                    752: 	}
                    753: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    754: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      755: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  756:     } 
                    757:     return $currentstring;
                    758: }
                    759: 
                    760: sub end_h2 {
1.125     sakharuk  761:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  762:     my $currentstring = '';
                    763:     if ($target eq 'web') {
                    764: 	$currentstring .= $token->[2];
                    765:     } elsif ($target eq 'tex') {
1.212     sakharuk  766: 	my $post='\vskip 0 mm ';
1.125     sakharuk  767: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  768: 	if ($align eq 'center') {
1.125     sakharuk  769: 	    $post='\end{center}';
                    770: 	} elsif ($align eq 'left') {
                    771: 	    $post='} \hfill'.'\vskip 0 mm ';
                    772: 	} elsif ($align eq 'right') {
                    773: 	    $post='}'.'\vskip 0 mm ';
                    774: 	}
                    775: 	$currentstring .= '}}'.$post;
1.122     albertel  776:     } 
                    777:     return $currentstring;
                    778: }
                    779: 
1.35      sakharuk  780: #-- <h3> tag
1.122     albertel  781: sub start_h3 {
1.125     sakharuk  782:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      783:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  784:     if ($target eq 'web') {
                    785: 	$currentstring .= $token->[4];
                    786:     } elsif ($target eq 'tex') {
1.125     sakharuk  787: 	my $pre;
                    788: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  789: 	if ($align eq 'center') {
1.125     sakharuk  790: 	    $pre='\begin{center}';
                    791: 	} elsif ($align eq 'left') {
                    792: 	    $pre='\rlap{';
                    793: 	} elsif ($align eq 'right') {
                    794: 	    $pre=' \hfill \llap{';
                    795: 	}
                    796: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    797: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      798: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  799:     } 
                    800:     return $currentstring;
                    801: }
                    802: 
                    803: sub end_h3 {
1.125     sakharuk  804:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  805:     my $currentstring = '';
                    806:     if ($target eq 'web') {
                    807: 	$currentstring .= $token->[2];
                    808:     } elsif ($target eq 'tex') {
1.212     sakharuk  809: 	my $post='\vskip 0 mm ';
1.125     sakharuk  810: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  811: 	if ($align eq 'center') {
1.125     sakharuk  812: 	    $post='\end{center}';
                    813: 	} elsif ($align eq 'left') {
                    814: 	    $post='} \hfill'.'\vskip 0 mm ';
                    815: 	} elsif ($align eq 'right') {
                    816: 	    $post='}'.'\vskip 0 mm ';
                    817: 	}
                    818: 	$currentstring .= '}}'.$post;
1.122     albertel  819:     } 
                    820:     return $currentstring;
                    821: }
                    822: 
1.35      sakharuk  823: #-- <h4> tag
1.122     albertel  824: sub start_h4 {
1.125     sakharuk  825:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      826:     my $currentstring = &end_p();	# Close off any prior para.
1.122     albertel  827:     if ($target eq 'web') {
                    828: 	$currentstring .= $token->[4];
                    829:     } elsif ($target eq 'tex') {
1.125     sakharuk  830: 	my $pre;
                    831: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  832: 	if ($align eq 'center') {
1.125     sakharuk  833: 	    $pre='\begin{center}';
                    834: 	} elsif ($align eq 'left') {
                    835: 	    $pre='\rlap{';
                    836: 	} elsif ($align eq 'right') {
                    837: 	    $pre=' \hfill \llap{';
                    838: 	}
                    839: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    840: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      841: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  842:     } 
                    843:     return $currentstring;
                    844: }
                    845: 
                    846: sub end_h4 {
1.125     sakharuk  847:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  848:     my $currentstring = '';
                    849:     if ($target eq 'web') {
                    850: 	$currentstring .= $token->[2];
                    851:     } elsif ($target eq 'tex') {
1.212     sakharuk  852: 	my $post='\vskip 0 mm ';
1.125     sakharuk  853: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  854: 	if ($align eq 'center') {
1.125     sakharuk  855: 	    $post='\end{center}';
                    856: 	} elsif ($align eq 'left') {
                    857: 	    $post='} \hfill'.'\vskip 0 mm ';
                    858: 	} elsif ($align eq 'right') {
                    859: 	    $post='}'.'\vskip 0 mm ';
                    860: 	}
                    861: 	$currentstring .= '}}'.$post;
1.122     albertel  862:     } 
                    863:     return $currentstring;
                    864: }
                    865: 
1.35      sakharuk  866: #-- <h5> tag
1.122     albertel  867: sub start_h5 {
1.125     sakharuk  868:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      869:     my $currentstring = &end_p();	# Close off any prior paras.
1.122     albertel  870:     if ($target eq 'web') {
                    871: 	$currentstring .= $token->[4];
                    872:     } elsif ($target eq 'tex') {
1.125     sakharuk  873: 	my $pre;
                    874: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  875: 	if ($align eq 'center') {
1.125     sakharuk  876: 	    $pre='\begin{center}';
                    877: 	} elsif ($align eq 'left') {
                    878: 	    $pre='\rlap{';
                    879: 	} elsif ($align eq 'right') {
                    880: 	    $pre=' \hfill \llap{';
                    881: 	}
                    882: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    883: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      884: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  885:     } 
                    886:     return $currentstring;
                    887: }
                    888: 
                    889: sub end_h5 {
1.125     sakharuk  890:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  891:     my $currentstring = '';
                    892:     if ($target eq 'web') {
                    893: 	$currentstring .= $token->[2];
                    894:     } elsif ($target eq 'tex') {
1.212     sakharuk  895: 	my $post='\vskip 0 mm ';
1.125     sakharuk  896: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  897: 	if ($align eq 'center') {
1.125     sakharuk  898: 	    $post='\end{center}';
                    899: 	} elsif ($align eq 'left') {
                    900: 	    $post='} \hfill'.'\vskip 0 mm ';
                    901: 	} elsif ($align eq 'right') {
                    902: 	    $post='}'.'\vskip 0 mm ';
                    903: 	}
                    904: 	$currentstring .= '}}'.$post;
1.122     albertel  905:     } 
                    906:     return $currentstring;
                    907: }
                    908: 
1.35      sakharuk  909: #-- <h6> tag
1.122     albertel  910: sub start_h6 {
1.125     sakharuk  911:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      912:     my $currentstring = &end_p();	# Close off any prior paras.
1.122     albertel  913:     if ($target eq 'web') {
                    914: 	$currentstring .= $token->[4];
                    915:     } elsif ($target eq 'tex') {
1.125     sakharuk  916: 	my $pre;
                    917: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  918: 	if ($align eq 'center') {
1.125     sakharuk  919: 	    $pre='\begin{center}';
                    920: 	} elsif ($align eq 'left') {
                    921: 	    $pre='\rlap{';
                    922: 	} elsif ($align eq 'right') {
                    923: 	    $pre=' \hfill \llap{';
                    924: 	}
                    925: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    926: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      927: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  928:     } 
                    929:     return $currentstring;
                    930: }
                    931: 
                    932: sub end_h6 {
1.125     sakharuk  933:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  934:     my $currentstring = '';
                    935:     if ($target eq 'web') {
                    936: 	$currentstring .= $token->[2];
                    937:     } elsif ($target eq 'tex') {
1.212     sakharuk  938: 	my $post='\vskip 0 mm ';
1.125     sakharuk  939: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  940: 	if ($align eq 'center') {
1.125     sakharuk  941: 	    $post='\end{center}';
                    942: 	} elsif ($align eq 'left') {
                    943: 	    $post='} \hfill'.'\vskip 0 mm ';
                    944: 	} elsif ($align eq 'right') {
                    945: 	    $post='}'.'\vskip 0 mm ';
                    946: 	}
                    947: 	$currentstring .= '}}'.$post;
1.122     albertel  948:     } 
                    949:     return $currentstring;
                    950: }
                    951: 
1.181     sakharuk  952: #--- <cite> tag (end tag required)
1.122     albertel  953: sub start_cite {
                    954:     my ($target,$token) = @_;
                    955:     my $currentstring = '';
                    956:     if ($target eq 'web') {
                    957: 	$currentstring .= $token->[4];
                    958:     } elsif ($target eq 'tex') {
1.179     sakharuk  959: 	$currentstring .= '\textit{';
1.144     sakharuk  960:     }
1.122     albertel  961:     return $currentstring;
                    962: }
                    963: 
                    964: sub end_cite {
                    965:     my ($target,$token) = @_;
                    966:     my $currentstring = '';
                    967:     if ($target eq 'web') {
                    968: 	$currentstring .= $token->[2];
                    969:     } elsif ($target eq 'tex') {
1.179     sakharuk  970: 	$currentstring .= '}';
1.144     sakharuk  971:     }
1.122     albertel  972:     return $currentstring;
                    973: }
                    974: 
1.181     sakharuk  975: #-- <i> tag (end tag required)
1.122     albertel  976: sub start_i {
                    977:     my ($target,$token) = @_;
                    978:     my $currentstring = '';
                    979:     if ($target eq 'web') {
                    980: 	$currentstring .= $token->[4];
                    981:     } elsif ($target eq 'tex') {
                    982: 	$currentstring .= '\textit{';
1.144     sakharuk  983:     }
1.122     albertel  984:     return $currentstring;
                    985: }
                    986: 
                    987: sub end_i {
                    988:     my ($target,$token) = @_;
                    989:     my $currentstring = '';
                    990:     if ($target eq 'web') {
                    991: 	$currentstring .= $token->[2];
                    992:     } elsif ($target eq 'tex') {
                    993: 	$currentstring .= '}';
                    994:     } 
                    995:     return $currentstring;
                    996: }
                    997: 
1.181     sakharuk  998: #-- <address> tag (end tag required)
1.122     albertel  999: sub start_address {
                   1000:     my ($target,$token) = @_;
                   1001:     my $currentstring = '';
                   1002:     if ($target eq 'web') {
                   1003: 	$currentstring .= $token->[4];
                   1004:     } elsif ($target eq 'tex') {
1.179     sakharuk 1005: 	$currentstring .= '\textit{';
1.144     sakharuk 1006:     }
1.122     albertel 1007:     return $currentstring;
                   1008: }
                   1009: 
                   1010: sub end_address {
                   1011:     my ($target,$token) = @_;
                   1012:     my $currentstring = '';
                   1013:     if ($target eq 'web') {
                   1014: 	$currentstring .= $token->[2];
                   1015:     } elsif ($target eq 'tex') {
1.179     sakharuk 1016: 	$currentstring .= '}';
1.122     albertel 1017:     }
                   1018:     return $currentstring;
                   1019: }
                   1020: 
1.181     sakharuk 1021: #-- <dfn> tag (end tag required)
1.122     albertel 1022: sub start_dfn {
                   1023:     my ($target,$token) = @_;
                   1024:     my $currentstring = '';
                   1025:     if ($target eq 'web') {
                   1026: 	$currentstring .= $token->[4];
                   1027:     } elsif ($target eq 'tex') {
1.179     sakharuk 1028: 	$currentstring .= '\textit{';
1.122     albertel 1029:     } 
                   1030:     return $currentstring;
                   1031: }
                   1032: 
                   1033: sub end_dfn {
                   1034:     my ($target,$token) = @_;
                   1035:     my $currentstring = '';
                   1036:     if ($target eq 'web') {
                   1037: 	$currentstring .= $token->[2];
                   1038:     } elsif ($target eq 'tex') {
1.179     sakharuk 1039: 	$currentstring .= '}';
1.144     sakharuk 1040:     }
1.122     albertel 1041:     return $currentstring;
                   1042: }
                   1043: 
1.181     sakharuk 1044: #-- <tt> tag (end tag required)
1.122     albertel 1045: sub start_tt {
                   1046:     my ($target,$token) = @_;
                   1047:     my $currentstring = '';
                   1048:     if ($target eq 'web') {
                   1049: 	$currentstring .= $token->[4];
                   1050:     } elsif ($target eq 'tex') {
                   1051: 	$currentstring .= '\texttt{';
1.144     sakharuk 1052:     }
1.122     albertel 1053:     return $currentstring;
                   1054: }
                   1055: 
                   1056: sub end_tt {
                   1057:     my ($target,$token) = @_;
                   1058:     my $currentstring = '';
                   1059:     if ($target eq 'web') {
                   1060: 	$currentstring .= $token->[2];
                   1061:     } elsif ($target eq 'tex') {
                   1062: 	$currentstring .= '}';
                   1063:     }
                   1064:     return $currentstring;
                   1065: }
                   1066: 
1.181     sakharuk 1067: #-- <kbd> tag (end tag required)
1.122     albertel 1068: sub start_kbd {
                   1069:     my ($target,$token) = @_;
                   1070:     my $currentstring = '';
                   1071:     if ($target eq 'web') {
                   1072: 	$currentstring .= $token->[4];
                   1073:     } elsif ($target eq 'tex') {
1.179     sakharuk 1074: 	$currentstring .= '\texttt{';
1.144     sakharuk 1075:     }
1.122     albertel 1076:     return $currentstring;
                   1077: }
                   1078: 
                   1079: sub end_kbd {
                   1080:     my ($target,$token) = @_;
                   1081:     my $currentstring = '';
                   1082:     if ($target eq 'web') {
                   1083: 	$currentstring .= $token->[2];
                   1084:     } elsif ($target eq 'tex') {
1.179     sakharuk 1085: 	$currentstring .= '}';
1.144     sakharuk 1086:     }
1.122     albertel 1087:     return $currentstring;
                   1088: }
                   1089: 
1.181     sakharuk 1090: #-- <code> tag (end tag required)
1.122     albertel 1091: sub start_code {
                   1092:     my ($target,$token) = @_;
                   1093:     my $currentstring = '';
                   1094:     if ($target eq 'web') {
                   1095: 	$currentstring .= $token->[4];
                   1096:     } elsif ($target eq 'tex') {
                   1097: 	$currentstring .= '\texttt{';
                   1098:     } 
                   1099:     return $currentstring;
                   1100: }
                   1101: 
                   1102: sub end_code {
                   1103:     my ($target,$token) = @_;
                   1104:     my $currentstring = '';
                   1105:     if ($target eq 'web') {
                   1106: 	$currentstring .= $token->[2];
                   1107:     } elsif ($target eq 'tex') {
                   1108: 	$currentstring .= '}';
                   1109:     } 
                   1110:     return $currentstring;
                   1111: }
                   1112: 
1.181     sakharuk 1113: #-- <em> tag (end tag required)
1.122     albertel 1114: sub start_em {
                   1115:     my ($target,$token) = @_;
                   1116:     my $currentstring = '';
                   1117:     if ($target eq 'web') {
                   1118: 	$currentstring .= $token->[4];
                   1119:     } elsif ($target eq 'tex') {
                   1120: 	$currentstring .= '\emph{';
1.144     sakharuk 1121:     }
1.122     albertel 1122:     return $currentstring;
                   1123: }
                   1124: 
                   1125: sub end_em {
                   1126:     my ($target,$token) = @_;
                   1127:     my $currentstring = '';
                   1128:     if ($target eq 'web') {
                   1129: 	$currentstring .= $token->[2];
                   1130:     } elsif ($target eq 'tex') {
                   1131: 	$currentstring .= '}';
1.144     sakharuk 1132:     } 
1.122     albertel 1133:     return $currentstring;
                   1134: }
                   1135: 
1.181     sakharuk 1136: #-- <q> tag (end tag required)
1.122     albertel 1137: sub start_q {
                   1138:     my ($target,$token) = @_;
                   1139:     my $currentstring = '';
                   1140:     if ($target eq 'web') {
                   1141: 	$currentstring .= $token->[4];
                   1142:     } elsif ($target eq 'tex') {
1.179     sakharuk 1143: 	$currentstring .= '\emph{';
1.122     albertel 1144:     }
                   1145:     return $currentstring;
                   1146: }
                   1147: 
                   1148: sub end_q {
                   1149:     my ($target,$token) = @_;
                   1150:     my $currentstring = '';
                   1151:     if ($target eq 'web') {
                   1152: 	$currentstring .= $token->[2];
                   1153:     } elsif ($target eq 'tex') {
1.179     sakharuk 1154: 	$currentstring .= '}';
1.144     sakharuk 1155:     } 
1.122     albertel 1156:     return $currentstring;
                   1157: }
                   1158: 
1.277     foxr     1159: #  <p> is a bit strange since it does not require a closing </p>
                   1160: #  However in latex, we must often output closing stuff to end
                   1161: #  environments and {}'s etc.  Therefore we do all the work
                   1162: #  of figuring out the ending strings in the start tag processing,
                   1163: #  and provide a mechanism to output the stop text external
                   1164: #  to tag processing.
                   1165: #
                   1166: {
                   1167: 
                   1168:     my $closing_string = '';		# String required to close <p>
                   1169: 
1.279     foxr     1170: #   Some tags are <p> fragile meaning that <p> inside of them
                   1171: #   does not work within TeX mode.  This is managed via the 
                   1172: #   counter below:
                   1173: #
                   1174: 
                   1175:     my $para_disabled = 0;
                   1176: 
                   1177: sub disable_para {
                   1178:     $para_disabled++;
                   1179: }
                   1180: sub enable_para {
                   1181:     $para_disabled--;
                   1182: }
                   1183: 
                   1184: 
1.181     sakharuk 1185: #-- <p> tag (end tag optional)
1.198     sakharuk 1186: #optional attribute - align="center|left|right"
1.122     albertel 1187: sub start_p {
1.157     sakharuk 1188:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1189:     my $currentstring = '';
1.122     albertel 1190:     if ($target eq 'web') {
1.279     foxr     1191: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.122     albertel 1192: 	$currentstring .= $token->[4];
1.279     foxr     1193: 	if (! ($currentstring =~ /\//)) {
                   1194: 	    $closing_string = '</p>'; # Deal correctly with <p /> e.g.
                   1195: 	}
                   1196:     } elsif ($target eq 'tex' && !$para_disabled) {
1.313     foxr     1197: 
1.279     foxr     1198: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.198     sakharuk 1199: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1200: 	if ($align eq 'center') {
1.277     foxr     1201: 	    $currentstring .='\begin{center}\par';
                   1202: 	    $closing_string = '\end{center}';
1.309     albertel 1203: 	    if (&is_inside_of($tagstack, "table")) {
                   1204: 		$currentstring = &center_correction().$currentstring;
                   1205: 	    }
1.198     sakharuk 1206: 	} elsif ($align eq 'right') {
1.323   ! foxr     1207: 	    $currentstring.="\n".'{\flushright ';
        !          1208: #	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
        !          1209: 	    $closing_string= "}\n";
1.198     sakharuk 1210: 	} elsif ($align eq 'left') {
1.323   ! foxr     1211: 	    $currentstring.= "\n".'{\flushleft ';
        !          1212: #	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
        !          1213: 	    $closing_string = "}\n";
1.216     matthew  1214: 	} else {
1.277     foxr     1215:             $currentstring.='\par ';
1.313     foxr     1216: 	    if (&is_inside_of($tagstack, 'table')) {
1.315     foxr     1217: 		$closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1.313     foxr     1218: 	    } else {
                   1219: 		$closing_string = '\strut\\\\\strut ';
                   1220: 	    }
1.216     matthew  1221:         }
1.277     foxr     1222: 
1.144     sakharuk 1223:     }
1.122     albertel 1224:     return $currentstring;
                   1225: }
1.277     foxr     1226: #
                   1227: #  End paragraph processing just requires that we output the
                   1228: #  closing string that was saved and blank it.
                   1229: sub end_p {
1.279     foxr     1230:     #  Note only 'tex' mode uses disable_para and enable_para
                   1231:     #  so we don't need to know the target in the check below:
                   1232: 
                   1233:     if (!$para_disabled) {
                   1234: 	my $current_string = $closing_string;
                   1235: 	$closing_string = '';	# Not in a para anymore.
                   1236: 	return $current_string;
                   1237:     } else {
                   1238: 	return '';
                   1239:     }
1.122     albertel 1240: 
                   1241: }
1.277     foxr     1242: }
1.181     sakharuk 1243: #-- <br> tag (end tag forbidden)
1.122     albertel 1244: sub start_br {
                   1245:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1246:     my $currentstring = '';
                   1247:     if ($target eq 'web') {
                   1248: 	$currentstring .= $token->[4];
                   1249:     } elsif ($target eq 'tex') {
1.227     sakharuk 1250: 	my @tempo=@$tagstack;
1.229     sakharuk 1251: 	my $signal=0;
1.287     foxr     1252: 	#  Not going to factor this to is_inside_of since that would require
                   1253:         #  multiple stack traversals.
                   1254: 	#
1.227     sakharuk 1255: 	for (my $i=$#tempo;$i>=0;$i--) {
                   1256: 	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1.230     sakharuk 1257:                 ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
                   1258:                 ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th'))  {
1.229     sakharuk 1259: 		$signal=1;
1.227     sakharuk 1260: 		last;
                   1261: 	    }
                   1262: 	}
1.229     sakharuk 1263: 	if ($signal) {
1.219     sakharuk 1264: 	    $currentstring .= ' \vskip 0 mm ';
                   1265: 	} elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
                   1266: 	    $currentstring .= '\strut \\\\ \strut ';
1.1       sakharuk 1267: 	}
1.144     sakharuk 1268:     }
1.122     albertel 1269:     return $currentstring;
                   1270: }
                   1271: 
                   1272: sub end_br {
                   1273:     my ($target,$token) = @_;
                   1274:     my $currentstring = '';
                   1275:     if ($target eq 'web') {
                   1276: 	$currentstring .= $token->[2];
                   1277:     }
                   1278:     return $currentstring;
                   1279: }
                   1280: 
1.181     sakharuk 1281: #-- <big> tag (end tag required)
1.122     albertel 1282: sub start_big {
                   1283:     my ($target,$token) = @_;
                   1284:     my $currentstring = '';
                   1285:     if ($target eq 'web') {
                   1286: 	$currentstring .= $token->[4];
                   1287:     } elsif ($target eq 'tex') {
1.137     sakharuk 1288: 	$currentstring .= '{\large ';
1.144     sakharuk 1289:     } 
1.122     albertel 1290:     return $currentstring;
                   1291: }
                   1292: 
                   1293: sub end_big {
                   1294:     my ($target,$token) = @_;
                   1295:     my $currentstring = '';
                   1296:     if ($target eq 'web') {
                   1297: 	$currentstring .= $token->[2];
                   1298:     } elsif ($target eq 'tex') {
                   1299: 	$currentstring .= '}';
                   1300:     }
                   1301:     return $currentstring;
                   1302: }
                   1303: 
1.181     sakharuk 1304: #-- <small> tag (end tag required)
1.122     albertel 1305: sub start_small {
                   1306:     my ($target,$token) = @_;
                   1307:     my $currentstring = '';
                   1308:     if ($target eq 'web') {
                   1309: 	$currentstring .= $token->[4];
                   1310:     } elsif ($target eq 'tex') {
                   1311: 	$currentstring .= '{\footnotesize ';
1.144     sakharuk 1312:     }
1.122     albertel 1313:     return $currentstring;
                   1314: }
                   1315: 
                   1316: sub end_small {
                   1317:     my ($target,$token) = @_;
                   1318:     my $currentstring = '';
                   1319:     if ($target eq 'web') {
                   1320: 	$currentstring .= $token->[2];
                   1321:     } elsif ($target eq 'tex') {
                   1322: 	$currentstring .= '}';
                   1323:     }
                   1324:     return $currentstring;
                   1325: }
                   1326: 
1.181     sakharuk 1327: #-- <basefont> tag (end tag forbidden)
1.122     albertel 1328: sub start_basefont {
1.126     sakharuk 1329:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.122     albertel 1330:     my $currentstring = '';
                   1331:     if ($target eq 'web') {
                   1332: 	$currentstring = $token->[4];     
1.126     sakharuk 1333:     } elsif ($target eq 'tex') {
                   1334: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1335: 	if (defined $basesize) {
                   1336: 	    $currentstring = '{\\'.$basesize.' ';
                   1337: 	}
                   1338:     }
1.122     albertel 1339:     return $currentstring;
                   1340: }
                   1341: 
                   1342: sub end_basefont {
1.126     sakharuk 1343:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1344:     my $currentstring = '';
                   1345:     if ($target eq 'web') {
                   1346: 	$currentstring = $token->[4];     
1.126     sakharuk 1347:     } elsif ($target eq 'tex') {
                   1348: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1349: 	if (defined $basesize) {
                   1350: 	    $currentstring = '}';
                   1351: 	}
                   1352:     }
1.122     albertel 1353:     return $currentstring;
                   1354: }
                   1355: 
1.181     sakharuk 1356: #-- <font> tag (end tag required)
1.122     albertel 1357: sub start_font {
                   1358:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1359:     my $currentstring = '';
                   1360:     if ($target eq 'web') {
                   1361: 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1.204     albertel 1362: 	if ($face!~/symbol/i) {
1.267     albertel 1363: 	    if (($env{'browser.fontenhance'} eq 'on') || 
                   1364: 		($env{'browser.blackwhite'} eq 'on')) { return ''; }
1.155     www      1365: 	}
1.122     albertel 1366: 	$currentstring = $token->[4];     
1.126     sakharuk 1367:     }  elsif ($target eq 'tex') {
                   1368: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1369: 	if (defined $fontsize) {
                   1370: 	    $currentstring = '{\\'.$fontsize.' ';
                   1371: 	}
                   1372:     }
1.122     albertel 1373:     return $currentstring;
                   1374: }
                   1375: 
                   1376: sub end_font {
                   1377:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1378:     my $currentstring = '';
                   1379:     if ($target eq 'web') {
                   1380: 	$currentstring = $token->[2];    
1.126     sakharuk 1381:     }  elsif ($target eq 'tex') {
                   1382: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1383: 	if (defined $fontsize) {
                   1384: 	    $currentstring = '}';
                   1385: 	}
                   1386:     }
1.122     albertel 1387:     return $currentstring;
                   1388: }
                   1389:  
1.181     sakharuk 1390: #-- <strike> tag (end tag required)
1.122     albertel 1391: sub start_strike {
                   1392:     my ($target,$token) = @_;
                   1393:     my $currentstring = '';
                   1394:     if ($target eq 'web') {
                   1395: 	$currentstring .= $token->[4];
                   1396:     } elsif ($target eq 'tex') {
                   1397: 	&Apache::lonxml::startredirection();
                   1398:     } 
                   1399:     return $currentstring;
                   1400: }
                   1401: 
                   1402: sub end_strike {
                   1403:     my ($target,$token) = @_;
                   1404:     my $currentstring = '';
                   1405:     if ($target eq 'web') {
                   1406: 	$currentstring .= $token->[2];
                   1407:     } elsif ($target eq 'tex') {
                   1408: 	$currentstring=&Apache::lonxml::endredirection();
                   1409: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 
                   1410: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/; 
                   1411: 	$currentstring=~s/(\S)\s*$/$1\}/;
                   1412:     }
                   1413:     return $currentstring;
                   1414: }
                   1415: 
1.181     sakharuk 1416: #-- <s> tag (end tag required)
1.122     albertel 1417: sub start_s {
                   1418:     my ($target,$token) = @_;
                   1419:     my $currentstring = '';
                   1420:     if ($target eq 'web') {
                   1421: 	$currentstring .= $token->[4];
                   1422:     } elsif ($target eq 'tex') {
                   1423: 	&Apache::lonxml::startredirection();
                   1424:     } 
                   1425:     return $currentstring;
                   1426: }
                   1427: 
                   1428: sub end_s {
                   1429:     my ($target,$token) = @_;
                   1430:     my $currentstring = '';
                   1431:     if ($target eq 'web') {
                   1432: 	$currentstring .= $token->[2];
                   1433:     } elsif ($target eq 'tex') {
                   1434: 	$currentstring=&Apache::lonxml::endredirection();
                   1435: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1436: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1437: 	$currentstring=~s/(\S)\s*$/$1\}/;	
                   1438:     }
                   1439:     return $currentstring;
                   1440: }
                   1441: 
1.181     sakharuk 1442: #-- <sub> tag (end tag required)
1.122     albertel 1443: sub start_sub {
                   1444:     my ($target,$token) = @_;
                   1445:     my $currentstring = '';
                   1446:     if ($target eq 'web') {
                   1447: 	$currentstring .= $token->[4];
                   1448:     } elsif ($target eq 'tex') {
1.202     sakharuk 1449: 	$currentstring .= '\ensuremath{_{';
1.122     albertel 1450:     } 
                   1451:     return $currentstring;
                   1452: }
                   1453: 
                   1454: sub end_sub {
                   1455:     my ($target,$token) = @_;
                   1456:     my $currentstring = '';
                   1457:     if ($target eq 'web') {
                   1458: 	$currentstring .= $token->[2];
                   1459:     } elsif ($target eq 'tex') {
1.202     sakharuk 1460: 	$currentstring .= '}}';
1.122     albertel 1461:     }
                   1462:     return $currentstring;
                   1463: }
                   1464: 
1.181     sakharuk 1465: #-- <sup> tag (end tag required)
1.122     albertel 1466: sub start_sup {
                   1467:     my ($target,$token) = @_;
                   1468:     my $currentstring = '';
                   1469:     if ($target eq 'web') {
                   1470: 	$currentstring .= $token->[4];
                   1471:     } elsif ($target eq 'tex') {
1.202     sakharuk 1472: 	$currentstring .= '\ensuremath{^{';
1.122     albertel 1473:     } 
                   1474:     return $currentstring;
                   1475: }
                   1476: 
                   1477: sub end_sup {
                   1478:     my ($target,$token) = @_;
                   1479:     my $currentstring = '';
                   1480:     if ($target eq 'web') {
                   1481: 	$currentstring .= $token->[2];
                   1482:     } elsif ($target eq 'tex') {
1.202     sakharuk 1483: 	$currentstring .= '}}';
1.122     albertel 1484:     }
                   1485:     return $currentstring;
                   1486: }
                   1487: 
1.181     sakharuk 1488: #-- <hr> tag (end tag forbidden)
1.122     albertel 1489: sub start_hr {
1.124     sakharuk 1490:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1491:     my $currentstring = &end_p();	# End enclosing para.
1.122     albertel 1492:     if ($target eq 'web') {
                   1493: 	$currentstring .= $token->[4];
                   1494:     } elsif ($target eq 'tex') {
1.149     sakharuk 1495: 	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.124     sakharuk 1496: 	if (defined $LaTeXwidth) {
                   1497: 	    if ($LaTeXwidth=~/^%/) {
                   1498: 		substr($LaTeXwidth,0,1)='';
                   1499: 		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
                   1500: 	    }
                   1501: 	} else {
1.148     sakharuk 1502: 	    $LaTeXwidth ='0.9\textwidth';
1.124     sakharuk 1503: 	}
                   1504: 	my ($pre,$post);
                   1505: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1506: 	if (($align eq 'center') || (not defined $align)) {
                   1507: 	    $pre=''; $post='';
                   1508: 	} elsif ($align eq 'left') {
                   1509: 	    $pre='\rlap{'; $post='} \hfill';
                   1510: 	} elsif ($align eq 'right') {
                   1511: 	    $pre=' \hfill \llap{'; $post='}';
                   1512: 	}
1.148     sakharuk 1513: 	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1.124     sakharuk 1514:                                     $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1.122     albertel 1515:     } 
                   1516:     return $currentstring;
                   1517: }
                   1518: 
                   1519: sub end_hr {
                   1520:     my ($target,$token) = @_;
                   1521:     my $currentstring = '';
                   1522:     if ($target eq 'web') {
                   1523: 	$currentstring .= $token->[2];
1.148     sakharuk 1524:     }
1.122     albertel 1525:     return $currentstring;
                   1526: }
                   1527: 
1.181     sakharuk 1528: #-- <div> tag (end tag required)
1.280     foxr     1529: {
                   1530: 
                   1531: #  Since div can be nested, the stack below is used
                   1532: #  in 'tex' mode to store the ending strings
                   1533: #  for the div stack.
                   1534: 
                   1535:     my @div_end_stack;
                   1536: 
1.122     albertel 1537: sub start_div {
1.280     foxr     1538:     my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1.279     foxr     1539:     my $currentstring = &end_p();	# Close enclosing para.
1.122     albertel 1540:     if ($target eq 'web') {
                   1541: 	$currentstring .= $token->[4];
                   1542:     } 
1.280     foxr     1543:     if ($target eq 'tex') {
                   1544: 	# 4 possible alignments: left, right, center, and -missing-.
                   1545: 
                   1546: 	my $endstring = '';
                   1547: 
                   1548: 	my $align = lc(&Apache::lonxml::get_param('align', $parstack,
                   1549: 						  $safeeval, undef, 1));
                   1550: 	if ($align eq 'center') {
                   1551: 	    $currentstring .= '\begin{center}';
                   1552: 	    $endstring      = '\end{center}';
1.309     albertel 1553: 	    if (&is_inside_of($tagstack, "table")) {
                   1554: 		$currentstring = &center_correction().$currentstring;
                   1555: 	    }
1.280     foxr     1556: 	}
                   1557: 	elsif ($align eq 'right') {
                   1558: 	    $currentstring .= '\begin{flushright}';
                   1559: 	    $endstring     .= '\end{flushright}';
                   1560: 	} elsif ($align eq 'left') {
                   1561: 	    $currentstring .= '\begin{flushleft}';
                   1562: 	    $endstring     = '\end{flushleft}';
                   1563: 	} else {
                   1564: 	
                   1565: 	}
                   1566: 	$currentstring .= "\n";   # For human readability.
                   1567: 	$endstring       = "\n$endstring\n"; # For human readability
                   1568: 	push(@div_end_stack, $endstring);
                   1569:     }
1.122     albertel 1570:     return $currentstring;
                   1571: }
                   1572: 
                   1573: sub end_div {
                   1574:     my ($target,$token) = @_;
                   1575:     my $currentstring = '';
                   1576:     if ($target eq 'web') {
                   1577: 	$currentstring .= $token->[2];
1.280     foxr     1578:     }
                   1579:     if ($target eq 'tex') {
                   1580: 	my $endstring = pop @div_end_stack;
                   1581: 	$currentstring .= $endstring;
                   1582:     }
1.122     albertel 1583:     return $currentstring;
                   1584: }
1.280     foxr     1585: }
1.122     albertel 1586: 
1.181     sakharuk 1587: #-- <a> tag (end tag required)
1.122     albertel 1588: sub start_a {
1.149     sakharuk 1589:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1590:     my $currentstring = '';
                   1591:     if ($target eq 'web') {
1.250     albertel 1592: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   1593: 					    undef,1);
                   1594: 	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1.122     albertel 1595:     } elsif ($target eq 'tex') {
1.149     sakharuk 1596: 	my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1.161     sakharuk 1597: 	my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
                   1598: 	if ($a=~/\S/) {
                   1599: 	    $a=~s/([^\\])%/$1\\\%/g;
                   1600: 	    $currentstring .= '\ref{URI: '.$a.'}';
                   1601: 	} elsif ($b=~/\S/) {
                   1602: 	    $currentstring .= '\ref{Anchor: '.$b.'}';
                   1603: 	} else {
                   1604: 	    $currentstring.='';
                   1605: 	}
1.122     albertel 1606:     }
                   1607:     return $currentstring;
                   1608: }
                   1609: 
                   1610: sub end_a {
1.168     albertel 1611:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1612:     my $currentstring = '';
                   1613:     if ($target eq 'web') {
                   1614: 	$currentstring .= $token->[2];
                   1615:     }
                   1616:     return $currentstring;
                   1617: }
                   1618: 
1.181     sakharuk 1619: #-- <li> tag (end tag optional)
1.122     albertel 1620: sub start_li {
1.168     albertel 1621:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1622:     my $currentstring = '';
                   1623:     if ($target eq 'web') {
                   1624: 	$currentstring = $token->[4];     
                   1625:     } elsif ($target eq 'tex') {
1.237     sakharuk 1626: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1627: 	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1.238     albertel 1628: 	#FIXME need to support types i and I 
                   1629: 	if ($type=~/disc/) {
                   1630: 	    $currentstring .= ' \item[$\bullet$] ';
                   1631: 	} elsif ($type=~/circle/) {
                   1632: 	    $currentstring .= ' \item[$\circ$] ';
1.146     sakharuk 1633: 	} elsif ($type=~/square/) {
1.238     albertel 1634: 	    $currentstring .= ' \item[$\diamond$] ';
                   1635: 	} elsif ($type eq '1') {
                   1636: 	    $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1.237     sakharuk 1637: 	} elsif ($type eq 'A') {
1.238     albertel 1638: 	    $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1639: 	} elsif ($type eq 'a') {
1.238     albertel 1640: 	    $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1641: 	} elsif ($value ne '') {
                   1642: 	    $currentstring .= ' \item['.$value.'] ';
1.122     albertel 1643: 	} else {
1.146     sakharuk 1644: 	    $currentstring .= ' \item ';
1.122     albertel 1645: 	}  
1.238     albertel 1646: 	$Apache::londefdef::list_index++;
                   1647:     }
1.122     albertel 1648:     return $currentstring;
                   1649: }
                   1650: 
                   1651: sub end_li {
                   1652:     my ($target,$token) = @_;
1.279     foxr     1653:     my $currentstring = &end_p();	# In case there's a <p> in the <li>
1.122     albertel 1654:     if ($target eq 'web') {
1.277     foxr     1655: 	$currentstring .= $token->[2];     
1.122     albertel 1656:     } 
                   1657:     return $currentstring;
                   1658: }
                   1659: 
1.181     sakharuk 1660: #-- <u> tag (end tag required)
1.122     albertel 1661: sub start_u {
                   1662:     my ($target,$token) = @_;
                   1663:     my $currentstring = '';
                   1664:     if ($target eq 'web') {
                   1665: 	$currentstring .= $token->[4];
                   1666:     } elsif ($target eq 'tex') {
                   1667: 	&Apache::lonxml::startredirection();
                   1668:     } 
                   1669:     return $currentstring;
                   1670: }
                   1671: 
                   1672: sub end_u {
                   1673:     my ($target,$token) = @_;
                   1674:     my $currentstring = '';
                   1675:     if ($target eq 'web') {
                   1676: 	$currentstring .= $token->[2];
                   1677:     } elsif ($target eq 'tex') {
                   1678: 	$currentstring=&Apache::lonxml::endredirection();
                   1679: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1680: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1681: 	$currentstring=~s/(\S)\s*$/$1\}/;		
                   1682:     }
                   1683:     return $currentstring;
                   1684: }
                   1685: 
1.181     sakharuk 1686: #-- <ul> tag (end tag required)
1.122     albertel 1687: sub start_ul {
1.125     sakharuk 1688:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1689:     my $currentstring = &end_p();	# Close off enclosing list.
1.122     albertel 1690:     if ($target eq 'web') {
1.277     foxr     1691: 	$currentstring .= $token->[4];     
1.122     albertel 1692:     } elsif ($target eq 'tex') {
1.125     sakharuk 1693: 	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1.238     albertel 1694: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1695: 	if ($TeXtype eq 'disc') {
1.222     sakharuk 1696: 	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                   1697:                               '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1698:                               '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1699:                               '\renewcommand{\labelitemiv}{$\bullet$}';
1.125     sakharuk 1700: 	} elsif ($TeXtype eq 'circle') {
1.222     sakharuk 1701: 	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                   1702:                               '\renewcommand{\labelitemii}{$\circ$}'. 
                   1703:                               '\renewcommand{\labelitemiii}{$\circ$}'.
                   1704:                               '\renewcommand{\labelitemiv}{$\circ$}';
1.125     sakharuk 1705: 	} elsif ($TeXtype eq 'square') {
1.222     sakharuk 1706: 	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                   1707:                               '\renewcommand{\labelitemii}{$\diamond$}'. 
                   1708:                               '\renewcommand{\labelitemiii}{$\diamond$}'.
                   1709:                               '\renewcommand{\labelitemiv}{$\diamond$}';
1.125     sakharuk 1710: 	}
1.222     sakharuk 1711: 	$currentstring .= '\strut \begin{itemize}';  
1.122     albertel 1712:     } 
                   1713:     return $currentstring;
                   1714: }
                   1715: 
                   1716: sub end_ul {
                   1717:     my ($target,$token) = @_;
                   1718:     my $currentstring = '';
                   1719:     if ($target eq 'web') {
                   1720: 	$currentstring = $token->[2];     
                   1721:     } elsif ($target eq 'tex') {
1.222     sakharuk 1722: 	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                   1723:                                '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1724:                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1725:                                '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
1.122     albertel 1726:     } 
                   1727:     return $currentstring;
                   1728: }
                   1729: 
1.181     sakharuk 1730: #-- <menu> tag (end tag required)
1.122     albertel 1731: sub start_menu {
                   1732:     my ($target,$token) = @_;
                   1733:     my $currentstring = '';
                   1734:     if ($target eq 'web') {
                   1735: 	$currentstring = $token->[4];     
                   1736:     } elsif ($target eq 'tex') {
                   1737: 	$currentstring = " \\begin{itemize} ";  
                   1738:     } 
                   1739:     return $currentstring;
                   1740: }
                   1741: 
                   1742: sub end_menu {
                   1743:     my ($target,$token) = @_;
                   1744:     my $currentstring = '';
                   1745:     if ($target eq 'web') {
                   1746: 	$currentstring = $token->[2];     
                   1747:     } elsif ($target eq 'tex') {
                   1748: 	$currentstring = " \\end{itemize}";  
                   1749:     } 
                   1750:     return $currentstring;
                   1751: }
                   1752: 
1.181     sakharuk 1753: #-- <dir> tag (end tag required)
1.122     albertel 1754: sub start_dir {
                   1755:     my ($target,$token) = @_;
1.279     foxr     1756:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.122     albertel 1757:     if ($target eq 'web') {
1.277     foxr     1758: 	$currentstring .= $token->[4];     
1.122     albertel 1759:     } elsif ($target eq 'tex') {
1.277     foxr     1760: 	$currentstring .= " \\begin{itemize} ";  
1.122     albertel 1761:     } 
                   1762:     return $currentstring;
                   1763: }
                   1764: 
                   1765: sub end_dir {
                   1766:     my ($target,$token) = @_;
                   1767:     my $currentstring = '';
                   1768:     if ($target eq 'web') {
                   1769: 	$currentstring = $token->[2];     
                   1770:     } elsif ($target eq 'tex') {
                   1771: 	$currentstring = " \\end{itemize}";  
                   1772:     } 
                   1773:     return $currentstring;
                   1774: }
                   1775: 
1.181     sakharuk 1776: #-- <ol> tag (end tag required)
1.122     albertel 1777: sub start_ol {
1.125     sakharuk 1778:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1779:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.122     albertel 1780:     if ($target eq 'web') {
1.277     foxr     1781: 	$currentstring .= $token->[4];     
1.122     albertel 1782:     } elsif ($target eq 'tex') {
1.238     albertel 1783: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1784: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1785: 	if ($type eq '1') {
1.222     sakharuk 1786: 	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1787:                               '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                   1788:                               '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1789:                               '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1.125     sakharuk 1790: 	} elsif ($type eq 'A') {
1.222     sakharuk 1791: 	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                   1792:                               '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                   1793:                               '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                   1794:                               '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1.125     sakharuk 1795: 	} elsif ($type eq 'a') {
1.222     sakharuk 1796: 	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                   1797:                               '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                   1798:                               '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                   1799:                               '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1.125     sakharuk 1800: 	} elsif ($type eq 'i') {
1.222     sakharuk 1801: 	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                   1802:                               '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                   1803:                               '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                   1804:                               '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1.125     sakharuk 1805: 	} elsif ($type eq 'I') {
1.222     sakharuk 1806: 	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                   1807:                               '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                   1808:                               '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                   1809:                               '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1.125     sakharuk 1810: 	}
1.222     sakharuk 1811: 	$currentstring .= '\strut \begin{enumerate}';  
1.122     albertel 1812:     } 
                   1813:     return $currentstring;
                   1814: }
                   1815: 
                   1816: sub end_ol {
                   1817:     my ($target,$token) = @_;
                   1818:     my $currentstring = '';
                   1819:     if ($target eq 'web') {
                   1820: 	$currentstring = $token->[2];     
                   1821:     } elsif ($target eq 'tex') {
1.222     sakharuk 1822: 	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1823:                                         '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                   1824:                                         '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1825:                                         '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
1.122     albertel 1826:     } 
                   1827:     return $currentstring;
                   1828: }
                   1829: 
1.181     sakharuk 1830: #-- <dl> tag (end tag required)
1.122     albertel 1831: sub start_dl {
                   1832:     my ($target,$token) = @_;
1.279     foxr     1833:     my $currentstring = &end_p();	# In case there's a <p> unclosed prior to the list.
1.122     albertel 1834:     if ($target eq 'web') {
1.277     foxr     1835: 	$currentstring .= $token->[4];     
1.122     albertel 1836:     } elsif ($target eq 'tex') {
1.277     foxr     1837: 	$currentstring .= '\begin{description}';
1.243     albertel 1838: 	$Apache::londefdef::DL++;
                   1839: 	push(@Apache::londefdef::description,[]);
                   1840: 	$Apache::londefdef::DD[$Apache::londefdef::DL]=0;
                   1841: 	$Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1.244     albertel 1842: 	$Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1.122     albertel 1843:     } 
                   1844:     return $currentstring;
                   1845: }
                   1846: 
                   1847: sub end_dl {
1.174     sakharuk 1848:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1849:     my $currentstring = '';
                   1850:     if ($target eq 'web') {
                   1851: 	$currentstring = $token->[2];     
                   1852:     } elsif ($target eq 'tex') {
1.243     albertel 1853: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1854: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
                   1855: 	foreach my $element (@{$Apache::londefdef::description[-1]}) {
1.174     sakharuk 1856: 	    $currentstring.=' '.$element.' ';
                   1857: 	}
1.243     albertel 1858: 	pop(@Apache::londefdef::description);
1.174     sakharuk 1859: 	$currentstring.='\end{description}';  
1.243     albertel 1860: 	delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
                   1861: 	delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1.244     albertel 1862: 	delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1.243     albertel 1863: 	$Apache::londefdef::DL--;
1.122     albertel 1864:     } 
                   1865:     return $currentstring;
                   1866: }
                   1867: 
1.172     sakharuk 1868: #-- <dt> tag (end tag optional)
1.122     albertel 1869: sub start_dt {
1.172     sakharuk 1870:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1871:     my $currentstring='';
1.122     albertel 1872:     if ($target eq 'web') {
                   1873: 	$currentstring = $token->[4];     
                   1874:     } elsif ($target eq 'tex') {
1.243     albertel 1875: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1876: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1.174     sakharuk 1877: 	&Apache::lonxml::startredirection();
1.243     albertel 1878: 	$Apache::londefdef::DT[-1]++;
1.244     albertel 1879: 	$Apache::londefdef::seenDT[-1]=1;
1.122     albertel 1880:     } 
                   1881:     return $currentstring;
                   1882: }
                   1883: 
                   1884: sub end_dt {
1.172     sakharuk 1885:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1886:     my $currentstring = '';
                   1887:     if ($target eq 'web') {
                   1888: 	$currentstring = $token->[2];    
                   1889:     } elsif ($target eq 'tex') {
1.243     albertel 1890: 	if ($Apache::londefdef::DT[-1]) {
                   1891: 	    my $data=&item_cleanup();
1.244     albertel 1892: 	    push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1.243     albertel 1893: 	    $Apache::londefdef::DT[-1]--;
                   1894: 	}
1.122     albertel 1895:     } 
                   1896:     return $currentstring;
                   1897: }
                   1898: 
1.173     sakharuk 1899: sub item_cleanup {
1.174     sakharuk 1900:     my $item=&Apache::lonxml::endredirection();
1.173     sakharuk 1901:     $item=~s/\\begin{center}//g;
                   1902:     $item=~s/\\end{center}//g;
                   1903:     return $item;
                   1904: }
                   1905: 
1.181     sakharuk 1906: #-- <dd> tag (end tag optional)
1.122     albertel 1907: sub start_dd {
1.147     sakharuk 1908:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1909:     my $currentstring = '';
                   1910:     if ($target eq 'web') {
                   1911: 	$currentstring = $token->[4];     
1.147     sakharuk 1912:     } elsif ($target eq 'tex') {
1.243     albertel 1913: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1914: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1.244     albertel 1915: 	if (!$Apache::londefdef::seenDT[-1]) {
                   1916: 	    push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
                   1917: 	}
1.243     albertel 1918: 	push(@{$Apache::londefdef::description[-1]},'');
                   1919: 	$Apache::londefdef::description[-1]->[-1].=' \strut ';
                   1920: 	$Apache::londefdef::DD[-1]++;
1.174     sakharuk 1921: 	&Apache::lonxml::startredirection();
1.122     albertel 1922:     } 
                   1923:     return $currentstring;
                   1924: }
                   1925: 
                   1926: sub end_dd {
1.174     sakharuk 1927:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1928:     my $currentstring = '';
                   1929:     if ($target eq 'web') {
                   1930: 	$currentstring = $token->[2];    
1.174     sakharuk 1931:     }  elsif ($target eq 'tex') {
1.243     albertel 1932: 	$Apache::londefdef::description[-1]->[-1].=
                   1933: 	    &Apache::lonxml::endredirection().' \vskip 0mm ';
                   1934: 	$Apache::londefdef::DD[-1]--;
1.174     sakharuk 1935:     }
1.122     albertel 1936:     return $currentstring;
                   1937: }
                   1938: 
1.181     sakharuk 1939: #-- <table> tag (end tag required)
1.277     foxr     1940: #       <table> also ends any prior <p> that is not closed.
                   1941: #               but, unless I allow <p>'s to nest, that's the
                   1942: #               only way I could think of to allow <p> in 
                   1943: #               <tr> <th> bodies
                   1944: #
1.206     sakharuk 1945: #list of supported attributes: border,width,TeXwidth
1.91      sakharuk 1946: sub start_table {
                   1947:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.277     foxr     1948:     my $textwidth = '';
1.279     foxr     1949:     my $currentstring = &end_p();
1.91      sakharuk 1950:     if ($target eq 'web') {
1.277     foxr     1951: 	$currentstring .= $token->[4];     
1.91      sakharuk 1952:     } elsif ($target eq 'tex') {
                   1953: 	my $aa = {};
                   1954: 	push @Apache::londefdef::table, $aa; 
                   1955: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 1956:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 1957: 	if ($#Apache::londefdef::table==0) {
1.267     albertel 1958: 	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1.206     sakharuk 1959: 	    $textwidth=~/(\d+\.?\d*)/;
                   1960: 	    $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
                   1961: 	} else {
                   1962: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   1963: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   1964: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   1965: 	    } else {
                   1966:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 1967: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 1968: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   1969: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   1970: 		}
                   1971: 	    }
                   1972: 	}
1.294     foxr     1973: 
                   1974: 	# width either comes forced from the TeXwidth or the width parameters.
                   1975: 	# in either case it can be a percentage or absolute width.
1.311     albertel 1976: 	# in the width case we ignore absolute width 
1.126     sakharuk 1977: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.308     albertel 1978: 	if (!defined($TeXwidth)) {
1.311     albertel 1979: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
                   1980: 						       $safeeval,undef,1);
                   1981: 	    if ($htmlwidth =~ /%/) {
                   1982: 		$TeXwidth = $htmlwidth;
                   1983: 	    } else { 
                   1984: 		$TeXwidth = $textwidth;
                   1985: 	    }
1.294     foxr     1986: 	} else {
                   1987: 	    $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
                   1988: 	}
                   1989: 	if ($TeXwidth=~/%/) {
1.203     sakharuk 1990: 	    $Apache::londefdef::table[-1]{'percent'}=1;
1.126     sakharuk 1991: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 1992:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 1993: 	} else {
1.206     sakharuk 1994: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.316     foxr     1995: 	}
                   1996:         #  In the end, however the table width cannot be wider than $textwidth...
                   1997: 	
                   1998: 	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
                   1999: 	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
                   2000: 	}
1.294     foxr     2001: 
1.126     sakharuk 2002:         #table's border
1.206     sakharuk 2003: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 2004:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 2005: 	unless (defined $border) { $border = 0; }
                   2006: 	if ($border) { 
                   2007: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   2008: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2009: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   2010: 	} else {
                   2011: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   2012: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2013: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   2014: 	}
1.206     sakharuk 2015: 	if ($#Apache::londefdef::table==0) {
1.281     foxr     2016: 	    #    Note that \newline seems to destroy the alignment envs.
                   2017: 	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
                   2018: 	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 2019: 	}
                   2020: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   2021:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   2022:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 2023:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 2024:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   2025:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   2026:         $Apache::londefdef::table[-1]{'content'}=[];
                   2027:         $Apache::londefdef::table[-1]{'align'}=[];
1.277     foxr     2028:         $currentstring.='\keephidden{NEW TABLE ENTRY}';
1.295     foxr     2029: 
1.294     foxr     2030: 
                   2031:     }
1.91      sakharuk 2032:     return $currentstring;
                   2033: }
1.122     albertel 2034:  
                   2035: sub end_table {
                   2036:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2037:     my $currentstring = '';
                   2038:     if ($target eq 'web') {
                   2039: 	$currentstring = $token->[2];     
                   2040:     } elsif ($target eq 'tex') {
                   2041: 	my $inmemory = '';
                   2042: 	my $output = '';
1.206     sakharuk 2043: 	my $WARNING='';
                   2044:         #width of columns from TeXwidth attributes
1.294     foxr     2045: 
1.206     sakharuk 2046: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2047: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2048: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   2049: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   2050: 		}	
                   2051: 	    }
                   2052: 	}
                   2053:         #free space and number of empty columns
                   2054: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 2055: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 2056: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2057: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   2058: 		$empty_columns++;
                   2059: 	    } else {
                   2060: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   2061: 	    }
                   2062: 	}
                   2063:         #boundaries for contents columns
                   2064: 	my @min_len=();#columns can not be narrower 
                   2065: 	my @max_len=();#maximum length of column
                   2066: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2067: 		my ($localmin,$localmax)=(0,0);
                   2068: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2069: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   2070: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   2071: 		    }
                   2072: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   2073: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   2074: 		    }
                   2075: 		}
                   2076: 		push @min_len, $localmin;
                   2077: 		push @max_len, $localmax;
1.122     albertel 2078: 	}
1.206     sakharuk 2079: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2080: 	    my $localmin=0,;
                   2081: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2082: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   2083: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   2084: 		}
                   2085: 	    }
1.229     sakharuk 2086: 	    if ($max_len[$jn]<$localmin) {
                   2087: 		$max_len[$jn]=$localmin;
                   2088: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2089: 	    }#object size is bigger
                   2090: 	    if ($min_len[$jn]<$localmin) {
                   2091: 		$min_len[$jn]=$localmin;
                   2092: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2093: 	    }#object size is bigger
1.206     sakharuk 2094: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   2095: 		$min_len[$jn]=0;
                   2096: 		$max_len[$jn]=0;
                   2097: 	    }
                   2098: 	}
                   2099:        #final adjustment of column width
                   2100: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   2101: 	my @adjust=();
                   2102:         #step 1. adjustment by maximum value
                   2103: 	my $space_neeeded=0;
                   2104: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2105: 	    $space_neeeded=$space_neeeded+$max_len[$jn];
                   2106: 	}
                   2107: 	if ($space_neeeded<=$available_space) {
                   2108: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2109: 		if ($fwidth[$jn]==0) {
                   2110: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 2111: 		}
1.51      sakharuk 2112: 	    }
1.206     sakharuk 2113: 	} else {
                   2114:         #step 2. adjustment by minimum value (estimation)
                   2115: 	    $space_neeeded=0;
                   2116: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2117: 		$space_neeeded+=$min_len[$jn];
                   2118: 	    }
                   2119: 	    if ($space_neeeded>$available_space) {
                   2120: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   2121: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2122: 		    if ($fwidth[$jn]==0) {
                   2123: 			$fwidth[$jn]=$min_len[$jn];
                   2124: 		    }
                   2125: 		}
1.229     sakharuk 2126: 		#check if we have objects which can be scaled
                   2127: 		my $how_many_to_scale=0;
                   2128: 		my @to_scale=();
                   2129: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2130: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   2131: 			$how_many_to_scale++;
                   2132: 			push @to_scale, $jn;
                   2133: 		    }
                   2134: 		}
                   2135: 		if ($how_many_to_scale>0) {
                   2136: 		    my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
                   2137: 		    foreach my $jn (@to_scale) {
                   2138: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2139: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   2140: 			    if ($1 ne '') {
                   2141: 				my $current_length=&recalc($1);
                   2142: 				$current_length=~/(\d+\.?\d*)/;
                   2143: 				$current_length=$current_length-$space_to_adjust;
                   2144: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   2145: 			    }
                   2146: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   2147: 			    if ($1 ne '') {
                   2148: 				my $current_length=$1;
                   2149: 				$current_length=$current_length-$space_to_adjust;
                   2150: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   2151: 			    }				
                   2152: 			}
                   2153: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   2154: 		    }
                   2155: 		}
1.206     sakharuk 2156: 	    } else {
                   2157: 	      #step 3. adjustment over minimal + corrections
                   2158: 		my $enlarge_coef=$available_space/$space_neeeded;
                   2159: 		my $acsessive=0;
                   2160: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2161: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2162: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2163: 			$fwidth[$jn]=$max_len[$jn];
                   2164: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2165: 			$adjust[$jn]=0;
                   2166: 		    }
                   2167: 		}
                   2168: 		if ($acsessive>0) {
                   2169: 		#we have an excess of space and can redistribute it
                   2170: 		    my $notempty_columns=0;
                   2171: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2172: 			if ($adjust[$jn]!=0) {
                   2173: 			    $notempty_columns++;
                   2174: 			}
                   2175: 		    }
                   2176: 		    my $per_column=$acsessive/$notempty_columns;
                   2177: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2178: 			if ($adjust[$jn]!=0) {
                   2179: 			    $adjust[$jn]+=$per_column;
                   2180: 			    $fwidth[$jn]=$adjust[$jn];
                   2181: 			}
1.223     sakharuk 2182: 		    }
                   2183: 		} else {
                   2184: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2185: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2186: 		    }
                   2187: 		}
1.203     sakharuk 2188: 	    }
                   2189: 	}
1.222     sakharuk 2190:         #use all available width if it is defined in % or as TeXwidth
                   2191:         if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
1.203     sakharuk 2192: 	    my $current=0; 
1.206     sakharuk 2193: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2194: 		$current+=$fwidth[$i];
1.203     sakharuk 2195: 	    }
                   2196: 	    my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
1.206     sakharuk 2197: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2198: 		$fwidth[$i]*=$coef;
                   2199: 	    }
                   2200: 	}
                   2201:         #removing of empty columns if allowed
1.208     sakharuk 2202:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2203: 	if ($permission eq 'yes') {
                   2204: 	    my @cleaned_table=();
                   2205:             my @cleaned_header=();
                   2206: 	    my $colind=0;
                   2207: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2208: 		if ($fwidth[$jn]!=0) {
                   2209: 		    #we need to copy column
                   2210: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2211: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2212: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2213: 		    }
                   2214: 		    $colind++;
                   2215: 		}
1.122     albertel 2216: 	    }
1.206     sakharuk 2217: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2218: 	    @fwidth=@cleaned_header;
1.122     albertel 2219: 	}
1.206     sakharuk 2220: 	#construct header of the table
                   2221: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2222: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2223: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2224: 	}
                   2225: 	$header_of_table .= '}';
1.126     sakharuk 2226: 	#fill the table
                   2227: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.306     foxr     2228: 	    my $have_rowspan = 0;
1.206     sakharuk 2229: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
1.320     foxr     2230: 
                   2231: 		#-----------------------------------------------------------
                   2232:                 #   I think this order of doing things will ensure that
                   2233: 		#   single rowspan, columspan and combined row/colspans will
                   2234:                 #   work correctly.  LaTeX is delicate here.
                   2235: 		#    RF.
                   2236: 
                   2237: 		# Start a rowspan if necessary:
                   2238: 
                   2239: 		my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
                   2240: 		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
1.304     foxr     2241: 		#
                   2242: 		#  Do the appropriate magic if this has a colspan
                   2243: 		# 
1.320     foxr     2244: 
1.304     foxr     2245: 		if ($colspan > 1) {
                   2246: 		    $output .= '\multicolumn{'.
                   2247: 			$colspan
                   2248: 			.'}{|l|}{';
                   2249: 		}
1.306     foxr     2250: 
                   2251: 		if ($rowspan > 1) {
                   2252: 		    $have_rowspan++;
                   2253: 		    $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
                   2254: 		}
                   2255: 		if (($rowspan eq '^') || ($rowspan eq '_')) {
                   2256: 		    $have_rowspan++;
                   2257: 		}
1.320     foxr     2258: 		#--------------------------------------------------------------
1.306     foxr     2259: 
1.206     sakharuk 2260: 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.309     albertel 2261: 		    $output.=&center_correction().'\begin{center}';
1.206     sakharuk 2262: 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2263: 		    $output.=' \hfill \llap{'
                   2264: 		}
                   2265: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2266: 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.314     albertel 2267: 		    $output.='\end{center}';
1.206     sakharuk 2268: 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2269: 		    $output.='} ';
                   2270: 		}
1.306     foxr     2271: 		# Close off any open multirow:
                   2272: 		
                   2273: 		if ($rowspan > 1) {
                   2274: 		    $output .= '}';
                   2275: 		}
1.304     foxr     2276: 		#  Close off the colspan...
                   2277: 		#
                   2278: 		if ($colspan > 1)  {
                   2279: 		    $output .= '}';
                   2280: 		    $jn += $colspan-1; # Adjust for number of rows really left.
                   2281: 		}
1.206     sakharuk 2282:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2283: 	    }
1.306     foxr     2284: 	    #  If have_rowspan > 0, and borders are on, then 
                   2285: 	    #  we need to do more than put an \hline at the bottom of row.
                   2286: 	    #  we need to do the appropriate \cline to ensure that
                   2287: 	    #  the spanned rows don't have \hlines through them.
                   2288: 
                   2289: 	    if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
                   2290: 		$output .= ' \\\\ ';
                   2291: 		for (my $jn=0; $jn<=$#fwidth;$jn++) {
                   2292: 		    my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
1.320     foxr     2293: 		    if ($rowspan ne "^") {
                   2294: 			if (($rowspan <= 1) || ($rowspan eq '_')) {
                   2295: 			    my $column = $jn+1;
                   2296: 			    $output .= '\cline{'.$column.'-'.$column.'} ';
                   2297: 			}
1.306     foxr     2298: 		    }
                   2299: 		}
                   2300: 
                   2301: 	    } else {
                   2302: 		$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
                   2303: 	    }
1.122     albertel 2304: 	}
1.281     foxr     2305: 	# Note that \newline destroys alignment env's produced  by e.g. <div>
                   2306: 	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
                   2307: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
1.127     sakharuk 2308: 	if ($#Apache::londefdef::table > 0) {	    
                   2309: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
1.294     foxr     2310: 	    # Figure out max/and min width  by summing us and then
                   2311: 	    # apply that to the current column of the table we nest in
                   2312: 	    # if it's larger than the current width or the current width
                   2313: 	    # is undefined.
                   2314: 	    #
                   2315: 	    my $min_nested_width = 0;
                   2316: 	    my $max_nested_width = 0;
                   2317: 	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
                   2318: 		$min_nested_width +=  $min_len[$col];
                   2319: 		$max_nested_width +=  $max_len[$col];
1.300     foxr     2320: 		
1.294     foxr     2321: 	    }
                   2322: 	    # Fudge in an extra 5 mm for borders etc:
                   2323: 	    
                   2324: 	    $min_nested_width += 5;
                   2325: 	    $max_nested_width += 5;
                   2326: 
                   2327: 	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
                   2328: 	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
                   2329: 	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
                   2330: 		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
                   2331: 	    }
                   2332: 	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
                   2333: 		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
                   2334: 	    }
                   2335: 
1.127     sakharuk 2336: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2337: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2338: 	} else {
                   2339: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2340: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2341: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2342: 	}
1.122     albertel 2343:     }
                   2344:     return $currentstring;
                   2345: }
                   2346: 
1.166     sakharuk 2347: #-- <tr> tag (end tag optional)
1.122     albertel 2348: sub start_tr {
                   2349:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2350:     my $currentstring = '';
                   2351:     if ($target eq 'web') {
                   2352: 	$currentstring = $token->[4];     
                   2353:     } elsif ($target eq 'tex') {
                   2354: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2355: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2356: 	if ($alignchar ne '') {
1.206     sakharuk 2357: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2358: 	} else {
                   2359: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2360: 	}
                   2361: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
1.300     foxr     2362: 	#
                   2363: 	#  Need to save the number of table columns to preserve the max # columns.
                   2364: 	#
                   2365: 	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
1.122     albertel 2366: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2367: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2368: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2369: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2370: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2371: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.122     albertel 2372:     } 
                   2373:     return $currentstring;
                   2374: }
                   2375:         
                   2376: sub end_tr {
1.160     sakharuk 2377:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2378:     my $currentstring = &end_p();	# Close any pending <p> in the row.
1.122     albertel 2379:     if ($target eq 'web') {
1.277     foxr     2380: 	$currentstring .= $token->[2];     
1.122     albertel 2381:     } elsif ($target eq 'tex') {
1.160     sakharuk 2382: 	if ($Apache::londefdef::TD_redirection) {
                   2383: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2384: 	}
1.300     foxr     2385: 	# Counter columns must be the maximum number of columns seen
                   2386: 	# in the table so far so:
                   2387: 	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
                   2388: 	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
                   2389: 	}
1.295     foxr     2390: 
                   2391: 
1.294     foxr     2392: 	
1.122     albertel 2393:     }
                   2394:     return $currentstring;
                   2395: }
                   2396: 
1.166     sakharuk 2397: #-- <td> tag (end tag optional)
1.122     albertel 2398: sub start_td {
                   2399:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2400:     my $currentstring = '';
                   2401:     if ($target eq 'web') {
                   2402: 	$currentstring = $token->[4];     
                   2403:     } elsif ($target eq 'tex') {
1.160     sakharuk 2404: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2405: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2406:     } 
                   2407:     return $currentstring;
                   2408: }   
1.159     sakharuk 2409:     
                   2410: sub tag_check {
                   2411:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2412:     my @ar=@$parstack; 
                   2413:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2414: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2415: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2416: 	    last;
                   2417: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2418: 	    splice @ar, $i+1;
                   2419: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2420: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2421: 	    last;
1.159     sakharuk 2422: 	}
1.160     sakharuk 2423:     }
1.159     sakharuk 2424:     return '';
                   2425: }
                   2426:  
                   2427: sub start_td_tex {
                   2428:     my ($parstack,$parser,$safeeval) = @_;
1.206     sakharuk 2429:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2430:     if ($alignchar eq '') {
                   2431: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2432:     }
1.206     sakharuk 2433:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2434:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2435:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2436:     if (defined $TeXwidth) {		
                   2437: 	my $current_length=&recalc($TeXwidth);
                   2438: 	$current_length=~/(\d+\.?\d*)/;
                   2439: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2440:     }
1.159     sakharuk 2441:     &Apache::lonxml::startredirection();
                   2442:     return '';
                   2443: }
                   2444: 
                   2445: sub end_td_tex {
                   2446:     my ($parstack,$parser,$safeeval) = @_;
1.304     foxr     2447:     my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
                   2448:     my $current_column = $Apache::londefdef::table[-1]{'counter_columns'}; 
1.303     foxr     2449:     my $data = &Apache::lonxml::endredirection();
                   2450: 
1.305     foxr     2451:     #  The rowspan array of the table indicates which cells are part of a span.
                   2452:     #  n indicates the start of a span set of n rows.
                   2453:     #  ^ indicates a cell that continues a span set.
1.306     foxr     2454:     #  _ indicates the cell is at the bottom of a span set.
1.305     foxr     2455:     #  If this and subsequent cells are part of a rowspan, we must
                   2456:     #  push along the row until we find one that is not.
                   2457: 
                   2458:     while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column]) 
1.306     foxr     2459: 	   && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
1.305     foxr     2460: 	# Part of a span.
                   2461: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
                   2462: 	$current_column++;
                   2463:     }
                   2464:     $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
                   2465:    
                   2466: 
1.320     foxr     2467:     # Get the column and row spans.
                   2468:     # Colspan can be done via \multicolumn if I can figure out the data structs.
                   2469: 
                   2470:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
                   2471:     if (!$colspan) {
                   2472: 	$colspan = 1;
                   2473:     }
1.305     foxr     2474: 
                   2475:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
                   2476:     if (!$rowspan) {
                   2477: 	$rowspan = 1;
                   2478:     }
                   2479: 
1.303     foxr     2480: 
1.305     foxr     2481: 
1.320     foxr     2482:     for (my $c = 0; $c < $colspan; $c++) {
                   2483: 	$Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
                   2484: 	for (my $i = 1; $i < $rowspan; $i++) {
                   2485: 	    $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
                   2486: 	    if ($i == ($rowspan-1)) {
                   2487: 		$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
                   2488: 	    }
1.306     foxr     2489: 	}
1.305     foxr     2490:     }
1.304     foxr     2491: 
1.159     sakharuk 2492:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2493:     if (defined $TeXwidth) {		
1.206     sakharuk 2494: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2495: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2496: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.159     sakharuk 2497:     } else {
1.206     sakharuk 2498: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2499: 	    my $garbage_data=$data;
                   2500: 	    my $fwidth=0;
                   2501:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2502: 		my $current_length=&recalc($1);
                   2503: 		$current_length=~/(\d+\.?\d*)/;
                   2504: 		if ($fwidth<$1) {$fwidth=$1;}
                   2505: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2506: 	    }
                   2507:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2508: 		my $current_length=$1;
                   2509: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2510: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2511: 	    }
                   2512: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2513: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2514: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2515: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.231     sakharuk 2516: 	} elsif ($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)*/) {
                   2517: 	    my $garbage_data=$data;
                   2518: 	    my $fwidth=0;
                   2519:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2520: 		my $current_length=&recalc($1);
                   2521: 		$current_length=~/(\d+\.?\d*)/;
                   2522: 		if ($fwidth<$1) {$fwidth=$1;}
                   2523: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2524: 	    }
                   2525:             while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2526: 		my $current_length=&recalc($1);
                   2527: 		$current_length=~/(\d+\.?\d*)/;
                   2528: 		if ($fwidth<$1) {$fwidth=$1;}
                   2529: 		$garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2530: 	    }
                   2531: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2532: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2533: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2534: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2535: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2536: 	} else {  
1.166     sakharuk 2537: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2538: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2539: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2540: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2541: 	    if ($data=~/\\vskip/) {
                   2542:                 my $newdata=$data;
                   2543: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2544: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2545: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2546: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2547: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2548:                     my @words=split(/ /,$elementdata);
                   2549: 		    foreach my $word (@words) {
                   2550: 			my $lengthword=2.5*&LATEX_length($word);
                   2551: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2552: 		    }
1.166     sakharuk 2553: 		}
                   2554: 	    } else {
1.206     sakharuk 2555: 		$current_length=2.5*&LATEX_length($data);
                   2556:                     my @words=split(/ /,$data);
                   2557: 		    foreach my $word (@words) {
1.228     sakharuk 2558: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2559: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2560: 		    }
1.166     sakharuk 2561: 	    }
1.206     sakharuk 2562: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2563: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2564: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2565: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
1.159     sakharuk 2566: 	}        
                   2567:     }
1.302     foxr     2568:     # Substitute all of the tables nested in this cell in their appropriate places.
                   2569: 
                   2570: 
                   2571:     my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
                   2572:     for (my $in=0; $in<=$nested_count; $in++) {    
1.301     foxr     2573: 	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
                   2574: 	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
                   2575: 	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2576: 	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
                   2577: 
                   2578:     }
                   2579:     # Should be be killing off the 'include' elements as they're used up?
1.305     foxr     2580: 
1.206     sakharuk 2581:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.305     foxr     2582: 
1.304     foxr     2583: 
                   2584: 
                   2585: 
                   2586:     #  the colspan array will indicate how many columns will be spanned by this
                   2587:     #  cell..this requires that counter_columns also be adjusted accordingly
                   2588:     #  so that the next bunch of text goes in the right cell.  Note that since
                   2589:     #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
                   2590:     #
                   2591: 
                   2592:     $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
                   2593:     for (my $i = 0; $i < ($colspan -1); $i++) {
                   2594: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
                   2595:     }
1.320     foxr     2596:     for (my $r = 0; $r < $rowspan; $r++) {
                   2597: 	$Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
                   2598: 	# Put empty text in spanned cols.
                   2599: 	
                   2600:     }
                   2601: 
1.304     foxr     2602: 
                   2603: 
1.301     foxr     2604:     return '';
1.159     sakharuk 2605: }
                   2606: 
1.122     albertel 2607: sub end_td {
1.126     sakharuk 2608:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2609:     my $currentstring = '';
                   2610:     if ($target eq 'web') {
                   2611: 	$currentstring = $token->[2];     
                   2612:     } elsif ($target eq 'tex') {
1.160     sakharuk 2613:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2614: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2615:     }
                   2616:     return $currentstring;
                   2617: }
                   2618: 
1.166     sakharuk 2619: #-- <th> tag (end tag optional)
1.122     albertel 2620: sub start_th {
                   2621:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2622:     my $currentstring = '';
                   2623:     if ($target eq 'web') {
                   2624: 	$currentstring = $token->[4];     
                   2625:     } elsif ($target eq 'tex') {
1.230     sakharuk 2626: 	$Apache::londefdef::TD_redirection = 1;
                   2627: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2628:     } 
                   2629:     return $currentstring;
1.130     sakharuk 2630: }   
1.230     sakharuk 2631:     
                   2632: sub tagg_check {
                   2633:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2634:     my @ar=@$parstack; 
                   2635:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2636: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2637: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2638: 	    last;
                   2639: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2640: 	    splice @ar, $i+1;
                   2641: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   2642: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2643: 	    last;
                   2644: 	}
                   2645:     }
                   2646:     return '';
                   2647: }
                   2648:  
                   2649: sub start_th_tex {
                   2650:     my ($parstack,$parser,$safeeval) = @_;
                   2651:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2652:     if ($alignchar eq '') {
                   2653: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   2654:     }
                   2655:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   2656:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   2657:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2658:     if (defined $TeXwidth) {		
                   2659: 	my $current_length=&recalc($TeXwidth);
                   2660: 	$current_length=~/(\d+\.?\d*)/;
                   2661: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2662:     }
                   2663:     &Apache::lonxml::startredirection();
                   2664:     return '';
                   2665: }
                   2666: 
                   2667: sub end_th_tex {
                   2668:     my ($parstack,$parser,$safeeval) = @_;
                   2669:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   2670:     my $data=&Apache::lonxml::endredirection();
                   2671:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2672:     if (defined $TeXwidth) {		
                   2673: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2674: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2675: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2676:     } else {
                   2677: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2678: 	    my $garbage_data=$data;
                   2679: 	    my $fwidth=0;
                   2680:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2681: 		my $current_length=&recalc($1);
                   2682: 		$current_length=~/(\d+\.?\d*)/;
                   2683: 		if ($fwidth<$1) {$fwidth=$1;}
                   2684: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2685: 	    }
                   2686:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2687: 		my $current_length=$1;
                   2688: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2689: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2690: 	    }
                   2691: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2692: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2693: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2694: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2695: 	} else {  
                   2696: 	    $data=~s/^\s+(\S.*)/$1/; 
                   2697: 	    $data=~s/(.*\S)\s+$/$1/;
                   2698: 	    $data=~s/(\s)+/$1/;
                   2699: 	    my ($current_length,$min_length)=(0,0);
                   2700: 	    if ($data=~/\\vskip/) {
                   2701:                 my $newdata=$data;
                   2702: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2703: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2704: 		foreach my $elementdata (@newdata) {
                   2705: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   2706: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   2707:                     my @words=split(/ /,$elementdata);
                   2708: 		    foreach my $word (@words) {
                   2709: 			my $lengthword=2.5*&LATEX_length($word);
                   2710: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2711: 		    }
                   2712: 		}
                   2713: 	    } else {
                   2714: 		$current_length=2.5*&LATEX_length($data);
                   2715:                     my @words=split(/ /,$data);
                   2716: 		    foreach my $word (@words) {
                   2717: 			my $lengthword=2*&LATEX_length($word);
                   2718: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2719: 		    }
                   2720: 	    }
                   2721: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2722: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2723: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2724: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2725: 	}        
                   2726:     }
                   2727: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   2728: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2729: 	}
                   2730:     #make data bold
                   2731:     $data='\textbf{'.$data.'}';
                   2732:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
                   2733:     return'';
                   2734: }
                   2735: 
1.122     albertel 2736: sub end_th {
1.130     sakharuk 2737:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2738:     my $currentstring = &end_p();	# Close any open <p> in the row.
1.122     albertel 2739:     if ($target eq 'web') {
1.277     foxr     2740: 	$currentstring .= $token->[2];     
1.122     albertel 2741:     } elsif ($target eq 'tex') {
1.230     sakharuk 2742:         $Apache::londefdef::TD_redirection =0;
                   2743: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 2744:     }
                   2745:     return $currentstring;
                   2746: }
1.230     sakharuk 2747:      
1.181     sakharuk 2748: #-- <img> tag (end tag forbidden)
1.249     foxr     2749: #
                   2750: #  Render the <IMG> tag.
                   2751: #     <IMG> has the following attributes (in addition to the 
                   2752: #     standard HTML ones:
                   2753: #      TeXwrap   - Governs how the tex target will try to wrap text around
                   2754: #                  horizontally aligned images.
                   2755: #      TeXwidth  - The width of the image when rendered for print (mm).
                   2756: #      TeXheight - The height of the image when rendered for print (mm)
                   2757: #         (Note there seems to also be support for this as a % of page size)
                   2758: #      
1.122     albertel 2759: sub start_img {
1.299     albertel 2760:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel 2761:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   2762: 					 undef,1);
1.189     albertel 2763:     if (not $src and ($target eq 'web' or $target eq 'tex')) { 
1.299     albertel 2764: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
1.189     albertel 2765: 	return '';
                   2766:     }
1.290     albertel 2767:     &Apache::lonxml::extlink($src);
1.122     albertel 2768:     my $currentstring = '';
                   2769:     my $scaling = .3;
1.249     foxr     2770: 
                   2771:    # Render unto browsers that which are the browser's...
                   2772: 
1.122     albertel 2773:     if ($target eq 'web') {
1.267     albertel 2774: 	if ($env{'browser.imagesuppress'} ne 'on') {
1.322     albertel 2775: 	    my $enc = ('yes' eq 
                   2776: 		       lc(&Apache::lonxml::get_param('encrypturl',$parstack,
                   2777: 						     $safeeval)));
                   2778: 	    $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
                   2779: 							 $enc);
1.122     albertel 2780: 	} else {
1.322     albertel 2781: 	    my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
                   2782: 						    undef,1);
                   2783: 	    if (!$alttag) {
                   2784: 		$alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   2785: 						   $src);
1.51      sakharuk 2786: 	    }
1.158     sakharuk 2787: 	    $currentstring.='[IMAGE: '.$alttag.']';
1.1       sakharuk 2788: 	}
1.249     foxr     2789: 
                   2790: 	# and render unto TeX that which is LaTeX
                   2791: 
1.122     albertel 2792:     } elsif ($target eq 'tex') {
1.248     foxr     2793: 	#
                   2794: 	#  The alignment will require some superstructure to be put around
                   2795: 	#  the \includegraphics stuff.  At present we can only partially
                   2796: 	#  simulate the alignments offered by html.
                   2797: 	#
                   2798: 	#
                   2799: 	my $align = lc(&Apache::lonxml::get_param('align', 
                   2800: 						  $parstack,
                   2801: 						  $safeeval,
                   2802: 						  undef,1));
                   2803: 	if(!$align) {
1.287     foxr     2804: 		$align = "bottom";	# This is html's default so it's ours too.
1.248     foxr     2805: 	}
                   2806: 	#
                   2807: 	&Apache::lonxml::debug("Alignemnt = $align");
                   2808: 	#  LaTeX's image/text wrapping is really bad since it wants to
                   2809: 	#  make figures float.  
                   2810:         #   The user has the optional parameter (applicable only to l/r
                   2811: 	# alignment to use the picins/parpic directive to get wrapped text
                   2812: 	# this is also imperfect.. that's why we give them a choice...
                   2813: 	# so they can't yell at us for our choice.
                   2814: 	#
                   2815: 	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
                   2816: 							    $parstack,
                   2817: 							    $safeeval,
                   2818: 							    undef,0);
1.312     foxr     2819: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
1.248     foxr     2820: 	if(!$latex_rendering) {
1.312     foxr     2821: 		$latex_rendering = "texwrap";
                   2822: 	}
                   2823: 	# using texwrap inside a table does not work. So, if after all of this,
                   2824: 	# texwrap is on, we turn it off if we detect we're in a table:
                   2825: 	#
                   2826: 	if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
                   2827: 	    $latex_rendering = 'parpic';
1.248     foxr     2828: 	}
1.323   ! foxr     2829: 
1.312     foxr     2830: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
1.248     foxr     2831: 
1.256     albertel 2832: 	#if original gif/jpg/png file exist do following:
1.266     albertel 2833: 	my $origsrc=$src;
1.256     albertel 2834: 	my ($path,$file) = &get_eps_image($src);
1.122     albertel 2835: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.261     foxr     2836: 	&Apache::lonxml::debug("path = $path file = $file src = $src");
1.192     sakharuk 2837: 	if (-e $src) {
1.261     foxr     2838: 	    &Apache::lonxml::debug("$src exists");
1.256     albertel 2839: 	    my ($height_param,$width_param)=
1.266     albertel 2840: 		&image_size($origsrc,0.3,$parstack,$safeeval);
1.262     foxr     2841: 	    my $destpath = $path;
1.263     foxr     2842: 	    $destpath    =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
                   2843: 	    my $destfile = $file;
                   2844: 	    $destfile    =~ s/ /\_/g;
1.266     albertel 2845: 	    my $size;
                   2846: 	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
                   2847: 	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
                   2848: 	    $size='['.$size;
                   2849: 	    $size=~s/,$/]/; 
1.262     foxr     2850: 	    $currentstring .= '\graphicspath{{'.$destpath.'}}'
1.266     albertel 2851: 		.'\includegraphics'.$size.'{'.$destfile.'} ';
1.256     albertel 2852: 
1.248     foxr     2853: 	    #    If there's an alignment specification we need to honor it here.
                   2854: 	    #    For the horizontal alignments, we will also honor the
                   2855: 	    #    value of the latex specfication.  The default is parbox,
                   2856: 	    #    and that's used for illegal values too.  
                   2857: 	    #    
                   2858: 	    #    Even though we set a default alignment value, the user
                   2859: 	    #    could have given us an illegal value.  In that case we
                   2860: 	    #    just use the default alignment of bottom..
                   2861: 	    if      ($align eq "top")    {
                   2862: 		$currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
                   2863: 	    } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
                   2864: 		my $offset = $height_param/2;
                   2865: 		$currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
                   2866: 	    } elsif ($align eq "left")   { 
                   2867: 		if ($latex_rendering eq "parpic") { 
                   2868: 		    $currentstring = '\parpic[l]{'.$currentstring.'}';
1.286     foxr     2869: 		} else {    	                                 # wrapfig render
                   2870: 		    $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
                   2871: 			.'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
1.248     foxr     2872: 		}
                   2873: 	    } elsif ($align eq "right")  {   
                   2874: 		if ($latex_rendering eq "parpic") {
                   2875: 		    $currentstring = '\parpic[r]{'.$currentstring.'}';
1.286     foxr     2876: 		} else {	                                 # wrapfig rendering
                   2877: 		    $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
                   2878: 			.'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
                   2879: 
1.248     foxr     2880: 		}
                   2881: 	    } else {		# Bottom is also default.
                   2882: 		# $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
                   2883: 	    }
1.122     albertel 2884: 	} else {
1.261     foxr     2885: 	    &Apache::lonxml::debug("$src does not exist");
1.122     albertel 2886: 	    #original image file doesn't exist so check the alt attribute
                   2887: 	    my $alt = 
                   2888: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   2889: 	    unless ($alt) {
                   2890: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   2891: 	    }
                   2892: 
1.256     albertel 2893: 	    if ($alt) { $currentstring .= ' '.$alt.' '; }
1.59      sakharuk 2894: 	}
1.249     foxr     2895: 
                   2896: 	# And here's where the semi-quote breaks down: allow the user
                   2897:         # to edit the beast as well by rendering the problem for edit:
1.186     albertel 2898:     } elsif ($target eq 'edit') {
                   2899: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   2900: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
                   2901: 	    &Apache::edit::browse('src',undef,'alt').' '.
                   2902: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   2903: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   2904: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   2905: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   2906: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   2907: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 2908: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   2909: 						   ['','bottom','middle','top','left','right'],$token,5);
1.249     foxr     2910: 	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
                   2911: 						   ['', 'parbox', 'parpic'], $token, 2);
1.322     albertel 2912: 	$currentstring .=&Apache::edit::select_arg('Encyrpt URL:','encrypturl',
                   2913: 						   ['no','yes'], $token, 2);
1.186     albertel 2914: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.249     foxr     2915: 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
                   2916: 	my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   2917: 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
                   2918: 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
                   2919: 
                   2920: 
1.186     albertel 2921: 	$currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   2922: 	if ($width) { $currentstring.=' width="'.$width.'" '; }
                   2923: 	if ($height) { $currentstring.=' height="'.$height.'" '; }
                   2924: 	$currentstring .= ' />';
                   2925:     } elsif ($target eq 'modified') {
1.210     albertel 2926: 	my ($osrc,$owidth,$oheight)=
                   2927: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2928: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 2929: 					     $safeeval,'src','alt','align',
1.249     foxr     2930: 					     'TeXwidth','TeXheight', 'TeXwrap',
1.322     albertel 2931: 					     'width','height','encrypturl');
1.210     albertel 2932: 	my ($nsrc,$nwidth,$nheight)=
                   2933: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2934: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   2935: 	&image_replication($loc);
                   2936: 	my ($iwidth,$iheight);
                   2937: 	if (-e $loc) {
                   2938: 	    my $image = Image::Magick->new;
                   2939: 	    $image->Read($loc);
                   2940: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   2941: 				   $image->Get('height'));
                   2942: 	}
                   2943: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   2944: 	    # changed image or no size specified,
                   2945:             # if they didn't explicitly change the 
                   2946:             # width or height use the ones from the image
                   2947: 	    if ($iwidth && $iheight) {
                   2948: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   2949: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   2950: 		}
                   2951: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   2952: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 2953: 		}
                   2954: 	    }
                   2955: 	}
1.210     albertel 2956: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   2957: 	# if we don't have a width or height
                   2958: 	if ($iwidth && $cwidth && !$cheight) {
                   2959: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   2960: 	}
                   2961: 	if ($iheight && $cheight && !$cwidth) {
                   2962: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   2963: 	}
                   2964: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 2965:     }
1.261     foxr     2966: 
1.122     albertel 2967:     return $currentstring;
                   2968: }
                   2969: 
                   2970: sub end_img {
                   2971:     my ($target,$token) = @_;
                   2972:     my $currentstring = '';
                   2973:     if ($target eq 'web') {
                   2974: 	$currentstring = $token->[2];
                   2975:     } elsif ($target eq 'tex') {
                   2976: 	$currentstring = '';
                   2977:     }
                   2978:     return $currentstring;
                   2979: }
                   2980: 
1.181     sakharuk 2981: #-- <applet> tag (end tag required)
1.122     albertel 2982: sub start_applet {
                   2983:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2984:     
                   2985:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
1.290     albertel 2986:     &Apache::lonxml::extlink($code);
1.122     albertel 2987:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   2988: 					   undef,1);
1.290     albertel 2989:     &Apache::lonxml::extlink($archive);
1.122     albertel 2990:     my $currentstring = '';
                   2991:     if ($target eq 'web') {
1.267     albertel 2992: 	if ($env{'browser.appletsuppress'} ne 'on') {
1.250     albertel 2993: 	    $currentstring = &Apache::lonenc::encrypt_ref($token,
                   2994: 							  {'code'=>$code,
                   2995: 							   'archive'=>$archive}
                   2996: 							  );
1.122     albertel 2997: 	} else {
                   2998: 	    my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   2999: 						   $safeeval,undef,1);
                   3000: 	    unless ($alttag) {
                   3001: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3002: 						 $code);
1.44      sakharuk 3003: 	    }
1.122     albertel 3004: 	    $currentstring='[APPLET: '.$alttag.']';
1.1       sakharuk 3005: 	}
1.122     albertel 3006:     } elsif ($target eq 'tex') {
1.177     albertel 3007: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3008: 					       $safeeval,undef,1);
                   3009: 	unless ($alttag) {
                   3010: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   3011: 						undef,1);
                   3012: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3013: 					     $code);
1.175     sakharuk 3014: 	}
1.177     albertel 3015: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   3016: 	    '.}\end{center}';
1.122     albertel 3017:     } 
                   3018:     return $currentstring;
                   3019: }
                   3020: 
                   3021: sub end_applet {
                   3022:     my ($target,$token) = @_;
                   3023:     my $currentstring = '';
                   3024:     if ($target eq 'web') {
                   3025: 	$currentstring = $token->[2];
                   3026:     } elsif ($target eq 'tex') {
                   3027:     } 
                   3028:     return $currentstring;
                   3029: }
                   3030: 
1.181     sakharuk 3031: #-- <embed> tag (end tag optional/required)
1.122     albertel 3032: sub start_embed {    
                   3033:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3034:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3035:     &Apache::lonxml::extlink($src);
1.122     albertel 3036:     my $currentstring = '';
                   3037:     if ($target eq 'web') {
1.267     albertel 3038: 	if ($env{'browser.embedsuppress'} ne 'on') {
1.250     albertel 3039: 	    $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 3040: 	} else {
                   3041: 	    my $alttag=&Apache::lonxml::get_param
                   3042: 		('alt',$parstack,$safeeval,undef,1);
                   3043: 	    unless ($alttag) {
                   3044: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
1.42      albertel 3045: 	    }
1.122     albertel 3046: 	    $currentstring='[EMBED: '.$alttag.']';
1.10      www      3047: 	}
1.122     albertel 3048:     } elsif ($target eq 'tex') {
                   3049:     } 
                   3050:     return $currentstring;
                   3051: }
                   3052: 
                   3053: sub end_embed {
                   3054:     my ($target,$token) = @_;
                   3055:     my $currentstring = '';
                   3056:     if ($target eq 'web') {
                   3057: 	$currentstring = $token->[2];     
1.175     sakharuk 3058:     } elsif ($target eq 'tex') {  
1.122     albertel 3059:     } 
                   3060:     return $currentstring;
                   3061: }
                   3062: 
1.181     sakharuk 3063: #-- <param> tag (end tag forbidden)
1.122     albertel 3064: sub start_param {
                   3065:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.290     albertel 3066:     if (&Apache::lonxml::get_param('name',$parstack,
                   3067: 				   $safeeval,undef,1)=~/^cabbase$/i) {
                   3068: 	my $value=&Apache::lonxml::get_param('value',$parstack,
                   3069: 					     $safeeval,undef,1);
                   3070: 	&Apache::lonxml::extlink($value);
                   3071:     } 
                   3072:   
                   3073:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3074:     &Apache::lonxml::extlink($src);
1.122     albertel 3075:     my $currentstring = '';
                   3076:     if ($target eq 'web') {
1.250     albertel 3077: 	my %toconvert;
                   3078: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3079: 	if ($src) { $toconvert{'src'}= $src; }
                   3080: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
                   3081: 					    undef,1);
1.251     albertel 3082: 	if ($name=~/^cabbase$/i) {
                   3083: 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
                   3084: 							   $safeeval,undef,1);
                   3085: 	}
1.250     albertel 3086: 	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
1.122     albertel 3087:     } elsif ($target eq 'tex') {
                   3088:     } 
                   3089:     return $currentstring;
                   3090: }
                   3091: 
                   3092: sub end_param {
                   3093:     my ($target,$token) = @_;
                   3094:     my $currentstring = '';
                   3095:     if ($target eq 'web') {
                   3096: 	$currentstring = $token->[2];     
                   3097:     } elsif ($target eq 'tex') {
                   3098:     } 
                   3099:     return $currentstring;
                   3100: }
                   3101: 
                   3102: #-- <allow> tag
                   3103: sub start_allow {
                   3104:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3105:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3106:     &Apache::lonxml::extlink($src);
                   3107: 
1.241     albertel 3108:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 3109:     my $result;
                   3110:     if ($target eq 'edit') {
                   3111: 	$result .=&Apache::edit::tag_start($target,$token);
                   3112: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   3113: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   3114:     } elsif ($target eq 'modified') {
                   3115: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   3116: 						     $safeeval,'src');
                   3117: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   3118:     }
                   3119:     return $result;
                   3120: }
                   3121: 
                   3122: sub end_allow {
                   3123:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3124:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   3125:     return '';
                   3126: }
1.119     www      3127: 
1.181     sakharuk 3128: #-- Frames (end tag required)
                   3129: #-- <frameset>
1.122     albertel 3130: sub start_frameset {
                   3131:     my ($target,$token) = @_;
1.277     foxr     3132:     my $currentstring = '';	# Close any pending para.
1.122     albertel 3133:     if ($target eq 'web') { 
1.180     albertel 3134: 	if (!$Apache::lonxml::registered &&
1.267     albertel 3135: 	    $env{'request.state'} eq 'published') {
1.122     albertel 3136: 	    $currentstring.='<head>'.
                   3137: 		&Apache::lonmenu::registerurl(undef,$target).'</head>';
1.10      www      3138: 	}
1.133     www      3139: 	my $onLoad='';
                   3140: 	foreach my $key (keys(%{$token->[2]})) {
                   3141: 	    if ($key =~ /^onload$/i) {
                   3142: 		$onLoad.=$token->[2]->{$key}.';';
                   3143: 		delete($token->[2]->{$key});
                   3144: 	    }
                   3145: 	}
                   3146: 	$token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
                   3147: 	my $onUnload='';
                   3148: 	foreach my $key (keys(%{$token->[2]})) {
                   3149: 	    if ($key =~ /^onunload$/i) {
                   3150: 		$onUnload.=$token->[2]->{$key}.';';
                   3151: 		delete($token->[2]->{$key});
                   3152: 	    }
                   3153: 	}
                   3154: 	$token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
                   3155: 	    ';'.$onUnload;
                   3156: 	
                   3157: 	$currentstring .= '<'.$token->[1];
                   3158: 	foreach (keys %{$token->[2]}) {
                   3159: 	    $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
                   3160: 	}
                   3161: 	$currentstring.='>';
1.122     albertel 3162:     }
                   3163:     return $currentstring;
                   3164: }
                   3165: 
                   3166: sub end_frameset {
                   3167:     my ($target,$token) = @_;
                   3168:     my $currentstring = '';
                   3169:     if ($target eq 'web') {
                   3170: 	$currentstring = $token->[2];
                   3171:     }
                   3172:     return $currentstring;
                   3173: }
1.162     sakharuk 3174: 
1.181     sakharuk 3175: #-- <xmp> (end tag required)
1.162     sakharuk 3176: sub start_xmp {
                   3177:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3178:     my $currentstring = '';
                   3179:     if ($target eq 'web') {
                   3180: 	$currentstring .= $token->[4];
                   3181:     } elsif ($target eq 'tex') {
                   3182: 	$currentstring .= '\begin{verbatim}';
                   3183:     } 
                   3184:     return $currentstring;
                   3185: }
                   3186: 
                   3187: sub end_xmp {
                   3188:     my ($target,$token) = @_;
                   3189:     my $currentstring = '';
                   3190:     if ($target eq 'web') {
                   3191: 	$currentstring .= $token->[2];
                   3192:     } elsif ($target eq 'tex') {
                   3193: 	$currentstring .= '\end{verbatim}';
                   3194:     }
                   3195:     return $currentstring;
                   3196: }
                   3197: 
1.181     sakharuk 3198: #-- <pre> (end tag required)
1.122     albertel 3199: sub start_pre {
1.126     sakharuk 3200:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3201:     my $currentstring = &end_p();	# close off pending <p>
1.122     albertel 3202:     if ($target eq 'web') {
                   3203: 	$currentstring .= $token->[4];
                   3204:     } elsif ($target eq 'tex') {
1.136     sakharuk 3205: 	$currentstring .= '\begin{verbatim}';
1.319     albertel 3206: 	&Apache::lonxml::disable_LaTeX_substitutions();
1.122     albertel 3207:     } 
                   3208:     return $currentstring;
                   3209: }
                   3210: 
                   3211: sub end_pre {
                   3212:     my ($target,$token) = @_;
                   3213:     my $currentstring = '';
                   3214:     if ($target eq 'web') {
                   3215: 	$currentstring .= $token->[2];
                   3216:     } elsif ($target eq 'tex') {
1.136     sakharuk 3217: 	$currentstring .= '\end{verbatim}';
1.319     albertel 3218: 	&Apache::lonxml::enable_LaTeX_substitutions();
1.122     albertel 3219:     }
                   3220:     return $currentstring;
                   3221: }
                   3222: 
                   3223: #-- <insert>
                   3224: sub start_insert {
                   3225:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3226:     my $currentstring = '';
                   3227:     if ($target eq 'web') {
                   3228: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3229: 	$currentstring .= '<b>'.$display.'</b>';;
                   3230:     }
                   3231:     return $currentstring;
                   3232: }
                   3233: 
                   3234: sub end_insert {
                   3235:     my ($target,$token) = @_;
                   3236:     my $currentstring = '';
                   3237:     if ($target eq 'web') {
                   3238: 	$currentstring .= '';
                   3239:     }
                   3240:     return $currentstring;
                   3241: }
                   3242: 
                   3243: #-- <externallink>
                   3244: sub start_externallink {
                   3245:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3246:     my $currentstring = '';
                   3247:     if ($target eq 'web') {
                   3248: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3249: 	$currentstring .= '<b>'.$display.'</b>';;
                   3250:     }
                   3251:     return $currentstring;
                   3252: }
                   3253: 
                   3254: sub end_externallink {
                   3255:     my ($target,$token) = @_;
                   3256:     my $currentstring = '';
                   3257:     if ($target eq 'web') {
                   3258: 	$currentstring .= '';
                   3259:     }
                   3260:     return $currentstring;
                   3261: }
                   3262: 
                   3263: #-- <blankspace heigth="">
                   3264: sub start_blankspace {
                   3265:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3266:     my $currentstring = &end_p();	# closes off any unclosed <p>
1.122     albertel 3267:     if ($target eq 'tex') {
                   3268: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   3269: 	$currentstring .= '\vskip '.$howmuch.' ';
                   3270:     }
                   3271:     return $currentstring;
                   3272: }
                   3273: 
                   3274: sub end_blankspace {
                   3275:     my ($target,$token) = @_;
                   3276:     my $currentstring = '';
                   3277:     if ($target eq 'tex') {
                   3278: 	$currentstring .= '';
                   3279:     }
                   3280:     return $currentstring;
                   3281: }
                   3282: 
1.181     sakharuk 3283: #-- <abbr> tag (end tag required)
1.122     albertel 3284: sub start_abbr {
                   3285:     my ($target,$token) = @_;
                   3286:     my $currentstring = '';
                   3287:     if ($target eq 'web') {
                   3288: 	$currentstring = $token->[4];     
                   3289:     } 
                   3290:     return $currentstring;
                   3291: }
                   3292: 
                   3293: sub end_abbr {
                   3294:     my ($target,$token) = @_;
                   3295:     my $currentstring = '';
                   3296:     if ($target eq 'web') {
                   3297: 	$currentstring = $token->[2];    
                   3298:     } 
                   3299:     return $currentstring;
                   3300: }
                   3301: 
1.181     sakharuk 3302: #-- <acronym> tag (end tag required)
1.122     albertel 3303: sub start_acronym {
                   3304:     my ($target,$token) = @_;
                   3305:     my $currentstring = '';
                   3306:     if ($target eq 'web') {
                   3307: 	$currentstring = $token->[4];     
                   3308:     } 
                   3309:     return $currentstring;
                   3310: }
                   3311: 
                   3312: sub end_acronym {
                   3313:     my ($target,$token) = @_;
                   3314:     my $currentstring = '';
                   3315:     if ($target eq 'web') {
                   3316: 	$currentstring = $token->[2];    
                   3317:     } 
                   3318:     return $currentstring;
                   3319: }
                   3320: 
1.181     sakharuk 3321: #-- <area> tag (end tag forbidden)
1.122     albertel 3322: sub start_area {
                   3323:     my ($target,$token) = @_;
                   3324:     my $currentstring = '';
                   3325:     if ($target eq 'web') {
                   3326: 	$currentstring = $token->[4];     
                   3327:     } 
                   3328:     return $currentstring;
                   3329: }
                   3330: 
                   3331: sub end_area {
                   3332:     my ($target,$token) = @_;
                   3333:     my $currentstring = '';
                   3334:     if ($target eq 'web') {
                   3335: 	$currentstring = $token->[2];    
                   3336:     } 
                   3337:     return $currentstring;
                   3338: }
                   3339: 
1.181     sakharuk 3340: #-- <base> tag (end tag forbidden)
1.122     albertel 3341: sub start_base {
                   3342:     my ($target,$token) = @_;
                   3343:     my $currentstring = '';
                   3344:     if ($target eq 'web') {
                   3345: 	$currentstring = $token->[4];     
1.161     sakharuk 3346:     }
1.122     albertel 3347:     return $currentstring;
                   3348: }
                   3349: 
                   3350: sub end_base {
                   3351:     my ($target,$token) = @_;
                   3352:     my $currentstring = '';
                   3353:     if ($target eq 'web') {
                   3354: 	$currentstring = $token->[2];    
                   3355:     } 
                   3356:     return $currentstring;
                   3357: }
                   3358: 
1.181     sakharuk 3359: #-- <bdo> tag (end tag required)
1.122     albertel 3360: sub start_bdo {
                   3361:     my ($target,$token) = @_;
                   3362:     my $currentstring = '';
                   3363:     if ($target eq 'web') {
                   3364: 	$currentstring = $token->[4];     
                   3365:     } 
                   3366:     return $currentstring;
                   3367: }
                   3368: 
                   3369: sub end_bdo {
                   3370:     my ($target,$token) = @_;
                   3371:     my $currentstring = '';
                   3372:     if ($target eq 'web') {
                   3373: 	$currentstring = $token->[2];    
                   3374:     } 
                   3375:     return $currentstring;
                   3376: }
                   3377: 
1.181     sakharuk 3378: #-- <bgsound> tag (end tag optional)
1.122     albertel 3379: sub start_bgsound {
                   3380:     my ($target,$token) = @_;
                   3381:     my $currentstring = '';
                   3382:     if ($target eq 'web') {
                   3383: 	$currentstring = $token->[4];     
                   3384:     } 
                   3385:     return $currentstring;
                   3386: }
                   3387: 
                   3388: sub end_bgsound {
                   3389:     my ($target,$token) = @_;
                   3390:     my $currentstring = '';
                   3391:     if ($target eq 'web') {
                   3392: 	$currentstring = $token->[2];    
                   3393:     } 
                   3394:     return $currentstring;
                   3395: }
                   3396: 
1.181     sakharuk 3397: #-- <blink> tag (end tag required)
1.122     albertel 3398: sub start_blink {
                   3399:     my ($target,$token) = @_;
                   3400:     my $currentstring = '';
                   3401:     if ($target eq 'web') {
                   3402: 	$currentstring = $token->[4];     
                   3403:     } 
                   3404:     return $currentstring;
                   3405: }
                   3406: 
                   3407: sub end_blink {
                   3408:     my ($target,$token) = @_;
                   3409:     my $currentstring = '';
                   3410:     if ($target eq 'web') {
                   3411: 	$currentstring = $token->[2];    
                   3412:     } 
                   3413:     return $currentstring;
                   3414: }
                   3415: 
1.181     sakharuk 3416: #-- <blockquote> tag (end tag required)
1.122     albertel 3417: sub start_blockquote {
                   3418:     my ($target,$token) = @_;
1.279     foxr     3419:     my $currentstring = &end_p();	# Close any unclosed <p>
1.122     albertel 3420:     if ($target eq 'web') {
1.277     foxr     3421: 	$currentstring .= $token->[4];     
1.122     albertel 3422:     } 
                   3423:     return $currentstring;
                   3424: }
                   3425: 
                   3426: sub end_blockquote {
                   3427:     my ($target,$token) = @_;
                   3428:     my $currentstring = '';
                   3429:     if ($target eq 'web') {
                   3430: 	$currentstring = $token->[2];    
                   3431:     } 
                   3432:     return $currentstring;
                   3433: }
                   3434: 
1.181     sakharuk 3435: #-- <button> tag (end tag required)
1.122     albertel 3436: sub start_button {
                   3437:     my ($target,$token) = @_;
                   3438:     my $currentstring = '';
                   3439:     if ($target eq 'web') {
                   3440: 	$currentstring = $token->[4];     
                   3441:     } 
                   3442:     return $currentstring;
                   3443: }
                   3444: 
                   3445: sub end_button {
                   3446:     my ($target,$token) = @_;
                   3447:     my $currentstring = '';
                   3448:     if ($target eq 'web') {
                   3449: 	$currentstring = $token->[2];    
                   3450:     } 
                   3451:     return $currentstring;
                   3452: }
                   3453: 
1.181     sakharuk 3454: #-- <caption> tag (end tag required)
1.122     albertel 3455: sub start_caption {
                   3456:     my ($target,$token) = @_;
                   3457:     my $currentstring = '';
                   3458:     if ($target eq 'web') {
                   3459: 	$currentstring = $token->[4];     
                   3460:     } 
                   3461:     return $currentstring;
                   3462: }
                   3463: 
                   3464: sub end_caption {
                   3465:     my ($target,$token) = @_;
                   3466:     my $currentstring = '';
                   3467:     if ($target eq 'web') {
                   3468: 	$currentstring = $token->[2];    
                   3469:     } 
                   3470:     return $currentstring;
                   3471: }
                   3472: 
1.181     sakharuk 3473: #-- <col> tag (end tag forbdden)
1.122     albertel 3474: sub start_col {
                   3475:     my ($target,$token) = @_;
                   3476:     my $currentstring = '';
                   3477:     if ($target eq 'web') {
                   3478: 	$currentstring = $token->[4];     
                   3479:     } 
                   3480:     return $currentstring;
                   3481: }
                   3482: 
                   3483: sub end_col {
                   3484:     my ($target,$token) = @_;
                   3485:     my $currentstring = '';
                   3486:     if ($target eq 'web') {
                   3487: 	$currentstring = $token->[2];    
                   3488:     } 
                   3489:     return $currentstring;
                   3490: }
                   3491: 
1.181     sakharuk 3492: #-- <colgroup> tag (end tag optional)
1.122     albertel 3493: sub start_colgroup {
                   3494:     my ($target,$token) = @_;
                   3495:     my $currentstring = '';
                   3496:     if ($target eq 'web') {
                   3497: 	$currentstring = $token->[4];     
                   3498:     } 
                   3499:     return $currentstring;
                   3500: }
                   3501: 
                   3502: sub end_colgroup {
                   3503:     my ($target,$token) = @_;
                   3504:     my $currentstring = '';
                   3505:     if ($target eq 'web') {
                   3506: 	$currentstring = $token->[2];    
                   3507:     } 
                   3508:     return $currentstring;
                   3509: }
                   3510: 
1.181     sakharuk 3511: #-- <del> tag (end tag required)
1.122     albertel 3512: sub start_del {
                   3513:     my ($target,$token) = @_;
                   3514:     my $currentstring = '';
                   3515:     if ($target eq 'web') {
                   3516: 	$currentstring = $token->[4];     
                   3517:     } 
                   3518:     return $currentstring;
                   3519: }
                   3520: 
                   3521: sub end_del {
                   3522:     my ($target,$token) = @_;
                   3523:     my $currentstring = '';
                   3524:     if ($target eq 'web') {
                   3525: 	$currentstring = $token->[2];    
                   3526:     } 
                   3527:     return $currentstring;
                   3528: }
                   3529: 
1.181     sakharuk 3530: #-- <fieldset> tag (end tag required)
1.122     albertel 3531: sub start_fieldset {
                   3532:     my ($target,$token) = @_;
                   3533:     my $currentstring = '';
                   3534:     if ($target eq 'web') {
                   3535: 	$currentstring = $token->[4];     
                   3536:     } 
                   3537:     return $currentstring;
                   3538: }
                   3539: 
                   3540: sub end_fieldset {
                   3541:     my ($target,$token) = @_;
                   3542:     my $currentstring = '';
                   3543:     if ($target eq 'web') {
                   3544: 	$currentstring = $token->[2];    
                   3545:     } 
                   3546:     return $currentstring;
                   3547: }
                   3548: 
1.181     sakharuk 3549: #-- <frame> tag (end tag forbidden)
1.122     albertel 3550: sub start_frame {
                   3551:     my ($target,$token) = @_;
                   3552:     my $currentstring = '';
                   3553:     if ($target eq 'web') {
                   3554: 	$currentstring = $token->[4];     
                   3555:     } 
                   3556:     return $currentstring;
                   3557: }
                   3558: 
                   3559: sub end_frame {
                   3560:     my ($target,$token) = @_;
                   3561:     my $currentstring = '';
                   3562:     if ($target eq 'web') {
                   3563: 	$currentstring = $token->[2];    
                   3564:     } 
                   3565:     return $currentstring;
                   3566: }
                   3567: 
1.181     sakharuk 3568: #-- <iframe> tag (end tag required)
1.122     albertel 3569: sub start_iframe {
                   3570:     my ($target,$token) = @_;
                   3571:     my $currentstring = '';
                   3572:     if ($target eq 'web') {
                   3573: 	$currentstring = $token->[4];     
                   3574:     } 
                   3575:     return $currentstring;
                   3576: }
                   3577: 
                   3578: sub end_iframe {
                   3579:     my ($target,$token) = @_;
                   3580:     my $currentstring = '';
                   3581:     if ($target eq 'web') {
                   3582: 	$currentstring = $token->[2];    
                   3583:     } 
                   3584:     return $currentstring;
                   3585: }
                   3586: 
1.181     sakharuk 3587: #-- <ins> tag (end tag required)
1.122     albertel 3588: sub start_ins {
                   3589:     my ($target,$token) = @_;
                   3590:     my $currentstring = '';
                   3591:     if ($target eq 'web') {
                   3592: 	$currentstring = $token->[4];     
                   3593:     } 
                   3594:     return $currentstring;
                   3595: }
                   3596: 
                   3597: sub end_ins {
                   3598:     my ($target,$token) = @_;
                   3599:     my $currentstring = '';
                   3600:     if ($target eq 'web') {
                   3601: 	$currentstring = $token->[2];    
                   3602:     } 
                   3603:     return $currentstring;
                   3604: }
                   3605: 
1.181     sakharuk 3606: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3607: sub start_isindex {
                   3608:     my ($target,$token) = @_;
                   3609:     my $currentstring = '';
                   3610:     if ($target eq 'web') {
                   3611: 	$currentstring = $token->[4];     
                   3612:     } 
                   3613:     return $currentstring;
                   3614: }
                   3615: 
                   3616: sub end_isindex {
                   3617:     my ($target,$token) = @_;
                   3618:     my $currentstring = '';
                   3619:     if ($target eq 'web') {
                   3620: 	$currentstring = $token->[2];    
                   3621:     } 
                   3622:     return $currentstring;
                   3623: }
                   3624: 
1.181     sakharuk 3625: #-- <keygen> tag (end tag forbidden)
1.122     albertel 3626: sub start_keygen {
                   3627:     my ($target,$token) = @_;
                   3628:     my $currentstring = '';
                   3629:     if ($target eq 'web') {
                   3630: 	$currentstring = $token->[4];     
                   3631:     } 
                   3632:     return $currentstring;
                   3633: }
                   3634: 
                   3635: sub end_keygen {
                   3636:     my ($target,$token) = @_;
                   3637:     my $currentstring = '';
                   3638:     if ($target eq 'web') {
                   3639: 	$currentstring = $token->[2];    
                   3640:     } 
                   3641:     return $currentstring;
                   3642: }
                   3643: 
                   3644: #-- <label> tag
                   3645: sub start_label {
                   3646:     my ($target,$token) = @_;
                   3647:     my $currentstring = '';
                   3648:     if ($target eq 'web') {
                   3649: 	$currentstring = $token->[4];     
                   3650:     } 
                   3651:     return $currentstring;
                   3652: }
                   3653: 
                   3654: sub end_label {
                   3655:     my ($target,$token) = @_;
                   3656:     my $currentstring = '';
                   3657:     if ($target eq 'web') {
                   3658: 	$currentstring = $token->[2];    
                   3659:     } 
                   3660:     return $currentstring;
                   3661: }
                   3662: 
1.181     sakharuk 3663: #-- <layer> tag (end tag required)
1.122     albertel 3664: sub start_layer {
                   3665:     my ($target,$token) = @_;
                   3666:     my $currentstring = '';
                   3667:     if ($target eq 'web') {
                   3668: 	$currentstring = $token->[4];     
                   3669:     } 
                   3670:     return $currentstring;
                   3671: }
                   3672: 
                   3673: sub end_layer {
                   3674:     my ($target,$token) = @_;
                   3675:     my $currentstring = '';
                   3676:     if ($target eq 'web') {
                   3677: 	$currentstring = $token->[2];    
                   3678:     } 
                   3679:     return $currentstring;
                   3680: }
                   3681: 
1.181     sakharuk 3682: #-- <legend> tag (end tag required)
1.122     albertel 3683: sub start_legend {
                   3684:     my ($target,$token) = @_;
                   3685:     my $currentstring = '';
                   3686:     if ($target eq 'web') {
                   3687: 	$currentstring = $token->[4];     
                   3688:     } 
                   3689:     return $currentstring;
                   3690: }
                   3691: 
                   3692: sub end_legend {
                   3693:     my ($target,$token) = @_;
                   3694:     my $currentstring = '';
                   3695:     if ($target eq 'web') {
                   3696: 	$currentstring = $token->[2];    
                   3697:     } 
                   3698:     return $currentstring;
                   3699: }
                   3700: 
1.181     sakharuk 3701: #-- <link> tag (end tag forbidden)
1.122     albertel 3702: sub start_link {
1.292     albertel 3703:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 3704:     my $currentstring = '';
                   3705:     if ($target eq 'web') {
1.291     albertel 3706: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   3707: 					    undef,1);
                   3708: 	&Apache::lonxml::extlink($href);
1.122     albertel 3709: 	$currentstring = $token->[4];     
                   3710:     } 
                   3711:     return $currentstring;
                   3712: }
                   3713: 
                   3714: sub end_link {
                   3715:     my ($target,$token) = @_;
                   3716:     my $currentstring = '';
                   3717:     if ($target eq 'web') {
                   3718: 	$currentstring = $token->[2];    
                   3719:     } 
                   3720:     return $currentstring;
                   3721: }
                   3722: 
1.181     sakharuk 3723: #-- <marquee> tag (end tag optional)
1.122     albertel 3724: sub start_marquee {
                   3725:     my ($target,$token) = @_;
                   3726:     my $currentstring = '';
                   3727:     if ($target eq 'web') {
                   3728: 	$currentstring = $token->[4];     
                   3729:     } 
                   3730:     return $currentstring;
                   3731: }
                   3732: 
                   3733: sub end_marquee {
                   3734:     my ($target,$token) = @_;
                   3735:     my $currentstring = '';
                   3736:     if ($target eq 'web') {
                   3737: 	$currentstring = $token->[2];    
                   3738:     } 
                   3739:     return $currentstring;
                   3740: }
                   3741: 
1.179     sakharuk 3742: #-- <multicol> tag (end tag required)
                   3743: sub start_multicol {
1.122     albertel 3744:     my ($target,$token) = @_;
1.279     foxr     3745:     my $currentstring = &end_p();	# Close any pending <p>
1.122     albertel 3746:     if ($target eq 'web') {
1.277     foxr     3747: 	$currentstring .= $token->[4];     
1.122     albertel 3748:     } 
                   3749:     return $currentstring;
                   3750: }
                   3751: 
1.179     sakharuk 3752: sub end_multicol {
1.122     albertel 3753:     my ($target,$token) = @_;
                   3754:     my $currentstring = '';
                   3755:     if ($target eq 'web') {
                   3756: 	$currentstring = $token->[2];    
                   3757:     } 
                   3758:     return $currentstring;
                   3759: }
                   3760: 
1.179     sakharuk 3761: #-- <nobr> tag (end tag required)
1.122     albertel 3762: sub start_nobr {
                   3763:     my ($target,$token) = @_;
                   3764:     my $currentstring = '';
                   3765:     if ($target eq 'web') {
                   3766: 	$currentstring = $token->[4];     
1.179     sakharuk 3767:     }  elsif ($target eq 'tex') {
                   3768: 	$currentstring='\mbox{';
                   3769:     }
1.122     albertel 3770:     return $currentstring;
                   3771: }
                   3772: 
                   3773: sub end_nobr {
                   3774:     my ($target,$token) = @_;
                   3775:     my $currentstring = '';
                   3776:     if ($target eq 'web') {
                   3777: 	$currentstring = $token->[2];    
1.179     sakharuk 3778:     }   elsif ($target eq 'tex') {
                   3779: 	$currentstring='}';
                   3780:     }
1.122     albertel 3781:     return $currentstring;
                   3782: }
                   3783: 
1.179     sakharuk 3784: #-- <noembed> tag (end tag required)
1.122     albertel 3785: sub start_noembed {
                   3786:     my ($target,$token) = @_;
                   3787:     my $currentstring = '';
                   3788:     if ($target eq 'web') {
                   3789: 	$currentstring = $token->[4];     
                   3790:     } 
                   3791:     return $currentstring;
                   3792: }
                   3793: 
                   3794: sub end_noembed {
                   3795:     my ($target,$token) = @_;
                   3796:     my $currentstring = '';
                   3797:     if ($target eq 'web') {
                   3798: 	$currentstring = $token->[2];    
                   3799:     } 
                   3800:     return $currentstring;
                   3801: }
                   3802: 
1.179     sakharuk 3803: #-- <noframes> tag (end tag required)
1.122     albertel 3804: sub start_noframes {
                   3805:     my ($target,$token) = @_;
                   3806:     my $currentstring = '';
                   3807:     if ($target eq 'web') {
                   3808: 	$currentstring = $token->[4];     
                   3809:     } 
                   3810:     return $currentstring;
                   3811: }
                   3812: 
                   3813: sub end_noframes {
                   3814:     my ($target,$token) = @_;
                   3815:     my $currentstring = '';
                   3816:     if ($target eq 'web') {
                   3817: 	$currentstring = $token->[2];    
                   3818:     } 
                   3819:     return $currentstring;
                   3820: }
                   3821: 
1.179     sakharuk 3822: #-- <nolayer> tag (end tag required)
1.122     albertel 3823: sub start_nolayer {
                   3824:     my ($target,$token) = @_;
                   3825:     my $currentstring = '';
                   3826:     if ($target eq 'web') {
                   3827: 	$currentstring = $token->[4];     
                   3828:     } 
                   3829:     return $currentstring;
                   3830: }
                   3831: 
                   3832: sub end_nolayer {
                   3833:     my ($target,$token) = @_;
                   3834:     my $currentstring = '';
                   3835:     if ($target eq 'web') {
                   3836: 	$currentstring = $token->[2];    
                   3837:     } 
                   3838:     return $currentstring;
                   3839: }
                   3840: 
1.179     sakharuk 3841: #-- <noscript> tag (end tag required)
1.122     albertel 3842: sub start_noscript {
                   3843:     my ($target,$token) = @_;
                   3844:     my $currentstring = '';
                   3845:     if ($target eq 'web') {
                   3846: 	$currentstring = $token->[4];     
                   3847:     } 
                   3848:     return $currentstring;
                   3849: }
                   3850: 
                   3851: sub end_noscript {
                   3852:     my ($target,$token) = @_;
                   3853:     my $currentstring = '';
                   3854:     if ($target eq 'web') {
                   3855: 	$currentstring = $token->[2];    
                   3856:     } 
                   3857:     return $currentstring;
                   3858: }
                   3859: 
1.179     sakharuk 3860: #-- <object> tag (end tag required)
1.122     albertel 3861: sub start_object {
                   3862:     my ($target,$token) = @_;
                   3863:     my $currentstring = '';
                   3864:     if ($target eq 'web') {
                   3865: 	$currentstring = $token->[4];     
                   3866:     } 
                   3867:     return $currentstring;
                   3868: }
                   3869: 
                   3870: sub end_object {
                   3871:     my ($target,$token) = @_;
                   3872:     my $currentstring = '';
                   3873:     if ($target eq 'web') {
                   3874: 	$currentstring = $token->[2];    
                   3875:     } 
                   3876:     return $currentstring;
                   3877: }
                   3878: 
1.179     sakharuk 3879: #-- <optgroup> tag (end tag required)
1.122     albertel 3880: sub start_optgroup {
                   3881:     my ($target,$token) = @_;
                   3882:     my $currentstring = '';
                   3883:     if ($target eq 'web') {
                   3884: 	$currentstring = $token->[4];     
                   3885:     } 
                   3886:     return $currentstring;
                   3887: }
                   3888: 
                   3889: sub end_optgroup {
                   3890:     my ($target,$token) = @_;
                   3891:     my $currentstring = '';
                   3892:     if ($target eq 'web') {
                   3893: 	$currentstring = $token->[2];    
                   3894:     } 
                   3895:     return $currentstring;
                   3896: }
                   3897: 
1.179     sakharuk 3898: #-- <samp> tag (end tag required)
1.122     albertel 3899: sub start_samp {
                   3900:     my ($target,$token) = @_;
                   3901:     my $currentstring = '';
                   3902:     if ($target eq 'web') {
                   3903: 	$currentstring = $token->[4];     
1.179     sakharuk 3904:     } elsif ($target eq 'tex') {
                   3905: 	$currentstring='\texttt{';
                   3906:     }
1.122     albertel 3907:     return $currentstring;
                   3908: }
                   3909: 
                   3910: sub end_samp {
                   3911:     my ($target,$token) = @_;
                   3912:     my $currentstring = '';
                   3913:     if ($target eq 'web') {
                   3914: 	$currentstring = $token->[2];    
1.179     sakharuk 3915:     } elsif ($target eq 'tex') {
                   3916: 	$currentstring='}';
                   3917:     }
1.122     albertel 3918:     return $currentstring;
                   3919: }
                   3920: 
                   3921: #-- <server> tag
                   3922: sub start_server {
                   3923:     my ($target,$token) = @_;
                   3924:     my $currentstring = '';
                   3925:     if ($target eq 'web') {
                   3926: 	$currentstring = $token->[4];     
                   3927:     } 
                   3928:     return $currentstring;
                   3929: }
                   3930: 
                   3931: sub end_server {
                   3932:     my ($target,$token) = @_;
                   3933:     my $currentstring = '';
                   3934:     if ($target eq 'web') {
                   3935: 	$currentstring = $token->[2];    
                   3936:     } 
                   3937:     return $currentstring;
                   3938: }
                   3939: 
1.179     sakharuk 3940: #-- <spacer> tag (end tag forbidden)
1.122     albertel 3941: sub start_spacer {
                   3942:     my ($target,$token) = @_;
1.279     foxr     3943:     my $currentstring = &end_p();	# Close off any open <p> tag.
1.122     albertel 3944:     if ($target eq 'web') {
1.277     foxr     3945: 	$currentstring .= $token->[4];     
1.122     albertel 3946:     } 
                   3947:     return $currentstring;
                   3948: }
                   3949: 
                   3950: sub end_spacer {
                   3951:     my ($target,$token) = @_;
                   3952:     my $currentstring = '';
                   3953:     if ($target eq 'web') {
                   3954: 	$currentstring = $token->[2];    
                   3955:     } 
                   3956:     return $currentstring;
                   3957: }
                   3958: 
1.179     sakharuk 3959: #-- <span> tag (end tag required)
1.122     albertel 3960: sub start_span {
                   3961:     my ($target,$token) = @_;
                   3962:     my $currentstring = '';
                   3963:     if ($target eq 'web') {
                   3964: 	$currentstring = $token->[4];     
                   3965:     } 
                   3966:     return $currentstring;
                   3967: }
                   3968: 
                   3969: sub end_span {
                   3970:     my ($target,$token) = @_;
                   3971:     my $currentstring = '';
                   3972:     if ($target eq 'web') {
                   3973: 	$currentstring = $token->[2];    
                   3974:     } 
                   3975:     return $currentstring;
                   3976: }
                   3977: 
1.179     sakharuk 3978: #-- <tbody> tag (end tag optional)
1.122     albertel 3979: sub start_tbody {
                   3980:     my ($target,$token) = @_;
                   3981:     my $currentstring = '';
                   3982:     if ($target eq 'web') {
                   3983: 	$currentstring = $token->[4];     
                   3984:     } 
                   3985:     return $currentstring;
                   3986: }
                   3987: 
                   3988: sub end_tbody {
                   3989:     my ($target,$token) = @_;
                   3990:     my $currentstring = '';
                   3991:     if ($target eq 'web') {
                   3992: 	$currentstring = $token->[2];    
                   3993:     } 
                   3994:     return $currentstring;
                   3995: }
                   3996: 
1.166     sakharuk 3997: #-- <tfoot> tag (end tag optional)
1.122     albertel 3998: sub start_tfoot {
                   3999:     my ($target,$token) = @_;
                   4000:     my $currentstring = '';
                   4001:     if ($target eq 'web') {
                   4002: 	$currentstring = $token->[4];     
                   4003:     } 
                   4004:     return $currentstring;
                   4005: }
                   4006: 
                   4007: sub end_tfoot {
                   4008:     my ($target,$token) = @_;
                   4009:     my $currentstring = '';
                   4010:     if ($target eq 'web') {
                   4011: 	$currentstring = $token->[2];    
                   4012:     } 
                   4013:     return $currentstring;
                   4014: }
                   4015: 
1.166     sakharuk 4016: #-- <thead> tag (end tag optional)
1.122     albertel 4017: sub start_thead {
                   4018:     my ($target,$token) = @_;
                   4019:     my $currentstring = '';
                   4020:     if ($target eq 'web') {
                   4021: 	$currentstring = $token->[4];     
                   4022:     } 
                   4023:     return $currentstring;
                   4024: }
1.10      www      4025: 
1.122     albertel 4026: sub end_thead {
                   4027:     my ($target,$token) = @_;
                   4028:     my $currentstring = '';
                   4029:     if ($target eq 'web') {
                   4030: 	$currentstring = $token->[2];    
                   4031:     } 
                   4032:     return $currentstring;
                   4033: }
1.119     www      4034: 
1.122     albertel 4035: #-- <var> tag
                   4036: sub start_var {
1.44      sakharuk 4037:     my ($target,$token) = @_;
                   4038:     my $currentstring = '';
                   4039:     if ($target eq 'web') {
1.122     albertel 4040: 	$currentstring = $token->[4];     
1.163     sakharuk 4041:     } elsif ($target eq 'tex') {
                   4042: 	$currentstring = '\textit{'; 
                   4043:     }
1.44      sakharuk 4044:     return $currentstring;
                   4045: }
1.10      www      4046: 
1.122     albertel 4047: sub end_var {
                   4048:     my ($target,$token) = @_;
1.44      sakharuk 4049:     my $currentstring = '';
                   4050:     if ($target eq 'web') {
1.163     sakharuk 4051: 	$currentstring = $token->[2];
                   4052:     } elsif ($target eq 'tex') {
                   4053: 	$currentstring = '}'; 
1.44      sakharuk 4054:     } 
                   4055:     return $currentstring;
                   4056: }
1.119     www      4057: 
1.163     sakharuk 4058: #-- <wbr> tag (end tag forbidden)
1.122     albertel 4059: sub start_wbr {
                   4060:     my ($target,$token) = @_;
                   4061:     my $currentstring = '';
                   4062:     if ($target eq 'web') {
                   4063: 	$currentstring = $token->[4];     
                   4064:     } 
                   4065:     return $currentstring;
1.98      albertel 4066: }
                   4067: 
1.122     albertel 4068: sub end_wbr {
                   4069:     my ($target,$token) = @_;
                   4070:     my $currentstring = '';
                   4071:     if ($target eq 'web') {
                   4072: 	$currentstring = $token->[2];    
                   4073:     } 
                   4074:     return $currentstring;
1.98      albertel 4075: }
1.134     sakharuk 4076: 
                   4077: #-- <hideweboutput> tag
                   4078: sub start_hideweboutput {
                   4079:     my ($target,$token) = @_;
                   4080:     if ($target eq 'web') {
                   4081: 	&Apache::lonxml::startredirection();     
                   4082:     } 
                   4083:     return '';
                   4084: }
                   4085: 
                   4086: sub end_hideweboutput {
                   4087:     my ($target,$token) = @_;
                   4088:     my $currentstring = '';
                   4089:     if ($target eq 'web') {
                   4090: 	$currentstring = &Apache::lonxml::endredirection();    
                   4091:     } 
                   4092:     return '';
                   4093: }
                   4094: 
1.94      sakharuk 4095: 
                   4096: sub image_replication {
                   4097:     my $src = shift;
1.187     albertel 4098:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   4099:     #replicates eps or ps 
                   4100:     my $epssrc = my $pssrc = $src;
                   4101:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   4102:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   4103:     if (not -e $epssrc && not -e $pssrc) {
                   4104: 	my $result=&Apache::lonnet::repcopy($epssrc);
1.264     raeburn  4105: 	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 4106:     }
                   4107:     return '';
1.195     sakharuk 4108: }
1.275     foxr     4109: #
                   4110: #   Get correct sizing parameter for an image given
                   4111: #   it's initial ht. and wid.  This allows sizing of
                   4112: #   images that are generated on-the-fly (e.g. gnuplot)
                   4113: #   as well as serving as a utility for image_size.
                   4114: # 
                   4115: #  Parameter:
                   4116: #        height_param
                   4117: #        width_param    - Initial picture dimensions.
                   4118: #        scaling        - A scale factor.
                   4119: #        parstack,      - the current stack of tag attributes 
                   4120: #                         from the xml parser
                   4121: #        safeeval,      - pointer to the safespace
                   4122: #        depth,         - from what level in the stack to look for attributes
                   4123: #                         (assumes -1 if unspecified)
                   4124: #        cis            - look for attrubutes case insensitively
                   4125: #                         (assumes false)
                   4126: #
                   4127: # Returns:
                   4128: #   height, width   - new dimensions.
                   4129: #
                   4130: sub resize_image {
                   4131:     my ($height_param, $width_param, $scaling,
                   4132: 	$parstack, $safeeval, $depth, $cis) = @_;
                   4133: 
                   4134:     # First apply the scaling...
1.271     foxr     4135: 
1.275     foxr     4136:     $height_param = $height_param * $scaling;
                   4137:     $width_param  = $width_param  * $scaling;
1.261     foxr     4138: 
1.197     sakharuk 4139:     #do we have any specified LaTeX size of the picture?
1.261     foxr     4140:     my $toget='TeXwidth'; 
                   4141:     if ($cis) { 
                   4142: 	$toget=lc($toget); 
                   4143:     }
1.256     albertel 4144:     my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
                   4145: 					      $safeeval,$depth,$cis);
                   4146:     $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
                   4147:     my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
                   4148: 					       $safeeval,$depth,$cis);
1.197     sakharuk 4149:     #do we have any specified web size of the picture?
                   4150:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
1.256     albertel 4151: 					   $depth,1);
                   4152:     if ($TeXwidth) { 
1.252     matthew  4153: 	my $old_width_param=$width_param;
1.197     sakharuk 4154: 	if ($TeXwidth=~/(\d+)\s*\%/) {
1.267     albertel 4155: 	    $width_param = $1*$env{'form.textwidth'}/100;
1.197     sakharuk 4156: 	} else { 
                   4157: 	    $width_param = $TeXwidth;
                   4158: 	}
1.266     albertel 4159: 	if ($TeXheight) {
                   4160: 	    $height_param = $TeXheight;
                   4161: 	} elsif ($old_width_param) {
                   4162: 	    $height_param=$TeXwidth/$old_width_param*$height_param;
                   4163: 	}
1.256     albertel 4164:     } elsif ($TeXheight) {
1.248     foxr     4165: 	$height_param = $TeXheight;
1.266     albertel 4166: 	if ($height_param) {
                   4167: 	    $width_param  = $TeXheight/$height_param*$width_param;
                   4168: 	}
1.256     albertel 4169:     } elsif ($width) {
1.252     matthew  4170: 	my $old_width_param=$width_param;
1.256     albertel 4171: 	$width_param = $width*$scaling;
1.266     albertel 4172: 	if ($old_width_param) {
                   4173: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4174: 	}
1.252     matthew  4175:     }
1.267     albertel 4176:     if ($width_param > $env{'form.textwidth'}) {
1.252     matthew  4177:         my $old_width_param=$width_param;
1.267     albertel 4178: 	$width_param =0.95*$env{'form.textwidth'};
1.266     albertel 4179: 	if ($old_width_param) {
                   4180: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4181: 	}
1.197     sakharuk 4182:     }
1.275     foxr     4183: 
                   4184:     return ($height_param, $width_param);
                   4185: }
                   4186: 
                   4187: sub image_size {
                   4188:     my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
                   4189: 
                   4190:     #size of image from gif/jpg/jpeg/png 
                   4191:     my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   4192:     if (-e $ressrc) {
                   4193: 	$src = $ressrc;
                   4194:     }
                   4195:     my $image = Image::Magick->new;
                   4196:     my $current_figure = $image->Read($src);
                   4197:     my $width_param = $image->Get('width');
                   4198:     my $height_param = $image->Get('height');
                   4199:     &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
                   4200:     undef($image);
                   4201: 
                   4202:     ($height_param, $width_param) = &resize_image($height_param, $width_param,
                   4203: 						  $scaling, $parstack, $safeeval, 
                   4204: 						  $depth, $cis);
                   4205: 
1.248     foxr     4206:     return ($height_param, $width_param);
                   4207: }
                   4208: 
                   4209: sub image_width {
                   4210:     my ($height, $width) = &image_size(@_);
                   4211:     return $width;
                   4212: }
                   4213: #  Not yet 100% sure this is correct in all circumstances..
                   4214: #  due to my uncertainty about mods to image_size.
                   4215: #
                   4216: sub image_height {
                   4217:     my ($height, $width) = &image_size(@_);
                   4218:     return $height;
1.197     sakharuk 4219: }
                   4220: 
1.256     albertel 4221: sub get_eps_image {
                   4222:     my ($src)=@_;
1.261     foxr     4223:     my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
1.285     foxr     4224: 
                   4225:     # In order to prevent the substitution of the alt text, we need to
                   4226:     # be sure the orig_src file is on system now so:
                   4227: 
                   4228:     if (! -e $orig_src) {
                   4229: 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
                   4230:     }
1.275     foxr     4231:     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
1.282     foxr     4232:     my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
1.256     albertel 4233:     $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
                   4234:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.275     foxr     4235:     &Apache::lonxml::debug("Filelocation gives: $src");
1.256     albertel 4236:     if (! -e $src) {
1.261     foxr     4237: 	&Apache::lonxml::debug("$src does not exist");
1.264     raeburn  4238: 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
1.261     foxr     4239: 	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
1.256     albertel 4240: 	    #if replication failed try to find ps file
                   4241: 	    $src=~s/\.eps$/\.ps/;
1.261     foxr     4242: 	    &Apache::lonxml::debug("Now looking for $src");
1.270     foxr     4243: 	    #if no ps file try to replicate it.
                   4244: 	    my $didrepcopy = &Apache::lonnet::repcopy($src);
                   4245: 	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
                   4246: 	    if ( (not -e $src) ||
                   4247: 		($didrepcopy ne 'ok')) {
1.261     foxr     4248: 		&Apache::lonxml::debug("Failed to find or replicate $src");
                   4249: 
1.256     albertel 4250: 		#if replication failed try to produce eps file dynamically
                   4251: 		$src=~s/\.ps$/\.eps/;
                   4252: 		my $temp_file;
1.267     albertel 4253: 		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.256     albertel 4254: 		my $newsrc=$orig_src;
                   4255: 		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
1.275     foxr     4256: 		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
1.256     albertel 4257: 		print FILE "$newsrc\n";
1.261     foxr     4258: 		close FILE;
1.256     albertel 4259: 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4260: 		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.283     albertel 4261: 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
                   4262: 		    $src =~ s/\.eps$/$sext.eps/;
                   4263: 		}
1.256     albertel 4264: 	    }
                   4265: 	}
                   4266:     }
                   4267:     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
1.261     foxr     4268:     &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
1.256     albertel 4269:     return ($path.'/',$file);
                   4270: }
                   4271: 
1.195     sakharuk 4272: sub eps_generation {
                   4273:     my ($src,$file,$width_param) = @_;	     
1.267     albertel 4274:     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
1.195     sakharuk 4275:     my $temp_file = Apache::File->new('>>'.$filename); 
                   4276:     print $temp_file "$src\n";
                   4277:     my $newsrc = $src;
                   4278:     $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
                   4279:     $newsrc=~s/\/home\/httpd\/html\/res//;
                   4280:     $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
                   4281:     $newsrc=~s/\/\.\//\//;
                   4282:     $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
1.213     sakharuk 4283:     if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
                   4284: 	$newsrc=~s/\/home\/httpd\/lonUsers//;
                   4285: 	$newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
                   4286:     }
1.239     sakharuk 4287:     if ($newsrc=~/\/userfiles\//) {
                   4288: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4289:     } else {
                   4290: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4291:     }
1.197     sakharuk 4292: }
                   4293: 
                   4294: sub file_path {     
                   4295:     my $src=shift;
                   4296:     my ($file,$path); 
                   4297:     if ($src =~ m!(.*)/([^/]*)$!) {
                   4298: 	$file = $2; 
                   4299: 	$path = $1.'/'; 
                   4300:     } 
                   4301:     return $file,$path;
1.126     sakharuk 4302: }
1.294     foxr     4303: #  Converts a measurement in to mm from any of 
                   4304: #  the other valid LaTeX units of measure.
                   4305: #  If the units of measure are missing from the 
                   4306: #  parameter, it is assumed to be in and returned
                   4307: #  with mm units of measure
1.126     sakharuk 4308: sub recalc {
                   4309:     my $argument = shift;
                   4310:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 4311:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 4312:     my $value=$1;
                   4313:     my $units=$2;
                   4314:     if ($units eq 'cm') {
                   4315: 	$value*=10;
                   4316:     } elsif ($units eq 'in') {
                   4317: 	$value*=25.4;
                   4318:     } elsif ($units eq 'pc') {
                   4319: 	$value*=(25.4*12/72.27);
                   4320:     } elsif ($units eq 'pt') {
                   4321: 	$value*=(25.4/72.27);
                   4322:     }
                   4323:     return $value.' mm';
1.94      sakharuk 4324: }
1.184     sakharuk 4325: 
                   4326: sub LATEX_length {
                   4327:     my $garbage=shift;
1.206     sakharuk 4328:     $garbage=~s/^\s+$//;
                   4329:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   4330:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   4331:     $garbage=~s/(\s)+/$1/;#only one space
                   4332:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   4333:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   4334:     $garbage=~s/([^\\])\$/$1/g;#$
                   4335:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   4336:    $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 4337:     $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;
                   4338:     $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;
                   4339:     $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 4340:     $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;
                   4341:     $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;
                   4342:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   4343:     #remove some other LaTeX command
                   4344:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   4345:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   4346:     $garbage=~s|\+|11|g;
1.184     sakharuk 4347:     my  $value=length($garbage);
                   4348:     return $value;
                   4349: }
                   4350: 
                   4351: 
1.287     foxr     4352: # is_inside_of $tagstack $tag
                   4353: #    This sub returns true if the current state of Xml processing
                   4354: #    is inside of the tag.   
                   4355: # Parameters:
                   4356: #     tagstack   - The tagstack from the parser.
                   4357: #     tag        - The tag (without the <>'s.).
                   4358: # Sample usage:
                   4359: #     if (is_inside_of($tagstack "table")) {
                   4360: #          # I'm in a table....
                   4361: #      }
                   4362: sub is_inside_of {
                   4363:     my ($tagstack, $tag) = @_;
                   4364:     my @stack = @$tagstack;
                   4365:     for (my $i = ($#stack - 1); $i >= 0; $i--) {
                   4366: 	if ($stack[$i] eq $tag) {
                   4367: 	    return 1;
                   4368: 	}
                   4369:     }
                   4370:     return 0;
                   4371: }
1.184     sakharuk 4372: 
1.94      sakharuk 4373: 
1.1       sakharuk 4374: 1;
                   4375: __END__

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