Annotation of loncom/xml/londefdef.pm, revision 1.321

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.321   ! foxr        4: # $Id: londefdef.pm,v 1.320 2006/02/15 11:57:44 foxr Exp $
1.41      sakharuk    5: # 
1.34      www         6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
1.156     sakharuk   28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
1.34      www        29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
                     30: # binary executable programs or libraries distributed by the 
                     31: # Michigan State University (the "Licensee"), but any binaries so 
                     32: # distributed are hereby licensed only for use in the context
                     33: # of a program or computational system for which the Licensee is the 
                     34: # primary author or distributor, and which performs substantial 
                     35: # additional tasks beyond the translation of (La)TeX into HTML.
                     36: # The C source of the Code may not be distributed by the Licensee
                     37: # to any other parties under any circumstances.
                     38: #
1.1       sakharuk   39: 
1.2       albertel   40: package Apache::londefdef; 
1.1       sakharuk   41: 
1.267     albertel   42: use Apache::lonnet;
1.1       sakharuk   43: use strict;
1.124     sakharuk   44: use Apache::lonxml;
1.57      sakharuk   45: use Apache::File();
1.70      sakharuk   46: use Image::Magick;
1.118     www        47: use Apache::lonmenu();
                     48: use Apache::lonmeta();
1.187     albertel   49: use Apache::Constants qw(:common);
1.282     foxr       50: use File::Basename;
1.302     foxr       51: # use Data::Dumper;
1.160     sakharuk   52: 
1.38      harris41   53: BEGIN {
1.15      sakharuk   54: 
1.135     sakharuk   55:     &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
1.15      sakharuk   56: 
1.188     albertel   57: }
                     58: 
1.294     foxr       59: #
                     60: #   Dumps all elements of the table structure.
                     61: #   Need this 'cause evidently when given an array, Data::Dumper only seems
                     62: #   to dump element 0.
                     63: #
1.302     foxr       64: #sub debug_dump_table {
                     65: #    my $lastrow = $#Apache::londefdef::table;
                     66: #    &Apache::lonnet::logthis("Dumping table:  Last row index: $lastrow");
                     67: #    my $row;
                     68: #    for ($row =0; $row <= $lastrow; $row++ ) {
                     69: #	my $text = Dumper($Apache::londefdef::table[$row]);
                     70: #	&Apache::lonnet::logthis("table [ $row ]".$text);
                     71: #    }
                     72: #}
1.188     albertel   73: sub initialize_londefdef {
                     74:     $Apache::londefdef::TD_redirection=0;
                     75:     @Apache::londefdef::table = ();
                     76:     $Apache::londefdef::select=0;
1.243     albertel   77:     undef(@Apache::londefdef::description);
                     78:     @Apache::londefdef::DD=(0);
                     79:     @Apache::londefdef::DT=(0);
1.244     albertel   80:     @Apache::londefdef::seenDT=(0);
1.238     albertel   81:     $Apache::londefdef::list_index=0;
1.3       sakharuk   82: }
1.1       sakharuk   83: 
1.35      sakharuk   84: #======================= TAG SUBROUTINES =====================
1.8       sakharuk   85: #-- <output>
1.21      albertel   86: sub start_output {
1.122     albertel   87:     my ($target) = @_;
                     88:     if ($target eq 'meta') { $Apache::lonxml::metamode--; }
                     89:     return '';
1.21      albertel   90: }
                     91: sub end_output {
1.122     albertel   92:     my ($target) = @_;
                     93:     if ($target eq 'meta') { $Apache::lonxml::metamode++; }
                     94:     return '';
1.21      albertel   95: }
1.4       sakharuk   96: #-- <m> tag
1.33      albertel   97: sub start_m {
1.190     albertel   98:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel   99:     my $currentstring = '';
1.193     albertel  100:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
1.191     albertel  101:     if ($target eq 'web' || $target eq 'analyze') {
1.122     albertel  102: 	&Apache::lonxml::debug("M is starting with:$inside:");
                    103: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    104: 	if ($eval eq 'on') {
                    105: 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
                    106: 	    #&Apache::lonxml::debug("M is evaulated to:$inside:");
                    107: 	}
1.317     albertel  108: 	my $tex = $inside;
1.276     albertel  109: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                    110: 	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
1.122     albertel  111: 	if ($Apache::lontexconvert::errorstring) {
1.317     albertel  112: 	    my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
                    113: 	    $tex = &HTML::Entities::encode($tex,'<>&"');
                    114: 	    my ($linenumber) =
                    115: 		($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
                    116: 	    if (defined($linenumber)) {
                    117: 		my @tex=split("\n",$tex);
                    118: 		$tex[$linenumber]='<b><font color="red">'.
                    119: 		    $tex[$linenumber].'</font></b>';
                    120: 		$tex=join("\n",@tex);
                    121: 	    }
                    122: 	    &Apache::lonxml::warning($errormsg.$tex.'</pre>');
1.122     albertel  123: 	    $Apache::lontexconvert::errorstring='';
                    124: 	}
                    125: 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
1.178     albertel  126: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  127:     } elsif ($target eq 'tex') {
1.190     albertel  128: 	$currentstring = $inside;
1.178     albertel  129: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    130: 	if ($eval eq 'on') {
                    131: 	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$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') {
1.277     foxr     1207: 	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
                   1208: 	    $closing_string= '}}';
1.198     sakharuk 1209: 	} elsif ($align eq 'left') {
1.277     foxr     1210: 	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
                   1211: 	    $closing_string = '}\hfill}';
1.216     matthew  1212: 	} else {
1.277     foxr     1213:             $currentstring.='\par ';
1.313     foxr     1214: 	    if (&is_inside_of($tagstack, 'table')) {
1.315     foxr     1215: 		$closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1.313     foxr     1216: 	    } else {
                   1217: 		$closing_string = '\strut\\\\\strut ';
                   1218: 	    }
1.216     matthew  1219:         }
1.277     foxr     1220: 
1.144     sakharuk 1221:     }
1.122     albertel 1222:     return $currentstring;
                   1223: }
1.277     foxr     1224: #
                   1225: #  End paragraph processing just requires that we output the
                   1226: #  closing string that was saved and blank it.
                   1227: sub end_p {
1.279     foxr     1228:     #  Note only 'tex' mode uses disable_para and enable_para
                   1229:     #  so we don't need to know the target in the check below:
                   1230: 
                   1231:     if (!$para_disabled) {
                   1232: 	my $current_string = $closing_string;
                   1233: 	$closing_string = '';	# Not in a para anymore.
                   1234: 	return $current_string;
                   1235:     } else {
                   1236: 	return '';
                   1237:     }
1.122     albertel 1238: 
                   1239: }
1.277     foxr     1240: }
1.181     sakharuk 1241: #-- <br> tag (end tag forbidden)
1.122     albertel 1242: sub start_br {
                   1243:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1244:     my $currentstring = '';
                   1245:     if ($target eq 'web') {
                   1246: 	$currentstring .= $token->[4];
                   1247:     } elsif ($target eq 'tex') {
1.227     sakharuk 1248: 	my @tempo=@$tagstack;
1.229     sakharuk 1249: 	my $signal=0;
1.287     foxr     1250: 	#  Not going to factor this to is_inside_of since that would require
                   1251:         #  multiple stack traversals.
                   1252: 	#
1.227     sakharuk 1253: 	for (my $i=$#tempo;$i>=0;$i--) {
                   1254: 	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1.230     sakharuk 1255:                 ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
                   1256:                 ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th'))  {
1.229     sakharuk 1257: 		$signal=1;
1.227     sakharuk 1258: 		last;
                   1259: 	    }
                   1260: 	}
1.229     sakharuk 1261: 	if ($signal) {
1.219     sakharuk 1262: 	    $currentstring .= ' \vskip 0 mm ';
                   1263: 	} elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
                   1264: 	    $currentstring .= '\strut \\\\ \strut ';
1.1       sakharuk 1265: 	}
1.144     sakharuk 1266:     }
1.122     albertel 1267:     return $currentstring;
                   1268: }
                   1269: 
                   1270: sub end_br {
                   1271:     my ($target,$token) = @_;
                   1272:     my $currentstring = '';
                   1273:     if ($target eq 'web') {
                   1274: 	$currentstring .= $token->[2];
                   1275:     }
                   1276:     return $currentstring;
                   1277: }
                   1278: 
1.181     sakharuk 1279: #-- <big> tag (end tag required)
1.122     albertel 1280: sub start_big {
                   1281:     my ($target,$token) = @_;
                   1282:     my $currentstring = '';
                   1283:     if ($target eq 'web') {
                   1284: 	$currentstring .= $token->[4];
                   1285:     } elsif ($target eq 'tex') {
1.137     sakharuk 1286: 	$currentstring .= '{\large ';
1.144     sakharuk 1287:     } 
1.122     albertel 1288:     return $currentstring;
                   1289: }
                   1290: 
                   1291: sub end_big {
                   1292:     my ($target,$token) = @_;
                   1293:     my $currentstring = '';
                   1294:     if ($target eq 'web') {
                   1295: 	$currentstring .= $token->[2];
                   1296:     } elsif ($target eq 'tex') {
                   1297: 	$currentstring .= '}';
                   1298:     }
                   1299:     return $currentstring;
                   1300: }
                   1301: 
1.181     sakharuk 1302: #-- <small> tag (end tag required)
1.122     albertel 1303: sub start_small {
                   1304:     my ($target,$token) = @_;
                   1305:     my $currentstring = '';
                   1306:     if ($target eq 'web') {
                   1307: 	$currentstring .= $token->[4];
                   1308:     } elsif ($target eq 'tex') {
                   1309: 	$currentstring .= '{\footnotesize ';
1.144     sakharuk 1310:     }
1.122     albertel 1311:     return $currentstring;
                   1312: }
                   1313: 
                   1314: sub end_small {
                   1315:     my ($target,$token) = @_;
                   1316:     my $currentstring = '';
                   1317:     if ($target eq 'web') {
                   1318: 	$currentstring .= $token->[2];
                   1319:     } elsif ($target eq 'tex') {
                   1320: 	$currentstring .= '}';
                   1321:     }
                   1322:     return $currentstring;
                   1323: }
                   1324: 
1.181     sakharuk 1325: #-- <basefont> tag (end tag forbidden)
1.122     albertel 1326: sub start_basefont {
1.126     sakharuk 1327:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.122     albertel 1328:     my $currentstring = '';
                   1329:     if ($target eq 'web') {
                   1330: 	$currentstring = $token->[4];     
1.126     sakharuk 1331:     } elsif ($target eq 'tex') {
                   1332: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1333: 	if (defined $basesize) {
                   1334: 	    $currentstring = '{\\'.$basesize.' ';
                   1335: 	}
                   1336:     }
1.122     albertel 1337:     return $currentstring;
                   1338: }
                   1339: 
                   1340: sub end_basefont {
1.126     sakharuk 1341:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1342:     my $currentstring = '';
                   1343:     if ($target eq 'web') {
                   1344: 	$currentstring = $token->[4];     
1.126     sakharuk 1345:     } elsif ($target eq 'tex') {
                   1346: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1347: 	if (defined $basesize) {
                   1348: 	    $currentstring = '}';
                   1349: 	}
                   1350:     }
1.122     albertel 1351:     return $currentstring;
                   1352: }
                   1353: 
1.181     sakharuk 1354: #-- <font> tag (end tag required)
1.122     albertel 1355: sub start_font {
                   1356:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1357:     my $currentstring = '';
                   1358:     if ($target eq 'web') {
                   1359: 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1.204     albertel 1360: 	if ($face!~/symbol/i) {
1.267     albertel 1361: 	    if (($env{'browser.fontenhance'} eq 'on') || 
                   1362: 		($env{'browser.blackwhite'} eq 'on')) { return ''; }
1.155     www      1363: 	}
1.122     albertel 1364: 	$currentstring = $token->[4];     
1.126     sakharuk 1365:     }  elsif ($target eq 'tex') {
                   1366: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1367: 	if (defined $fontsize) {
                   1368: 	    $currentstring = '{\\'.$fontsize.' ';
                   1369: 	}
                   1370:     }
1.122     albertel 1371:     return $currentstring;
                   1372: }
                   1373: 
                   1374: sub end_font {
                   1375:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1376:     my $currentstring = '';
                   1377:     if ($target eq 'web') {
                   1378: 	$currentstring = $token->[2];    
1.126     sakharuk 1379:     }  elsif ($target eq 'tex') {
                   1380: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1381: 	if (defined $fontsize) {
                   1382: 	    $currentstring = '}';
                   1383: 	}
                   1384:     }
1.122     albertel 1385:     return $currentstring;
                   1386: }
                   1387:  
1.181     sakharuk 1388: #-- <strike> tag (end tag required)
1.122     albertel 1389: sub start_strike {
                   1390:     my ($target,$token) = @_;
                   1391:     my $currentstring = '';
                   1392:     if ($target eq 'web') {
                   1393: 	$currentstring .= $token->[4];
                   1394:     } elsif ($target eq 'tex') {
                   1395: 	&Apache::lonxml::startredirection();
                   1396:     } 
                   1397:     return $currentstring;
                   1398: }
                   1399: 
                   1400: sub end_strike {
                   1401:     my ($target,$token) = @_;
                   1402:     my $currentstring = '';
                   1403:     if ($target eq 'web') {
                   1404: 	$currentstring .= $token->[2];
                   1405:     } elsif ($target eq 'tex') {
                   1406: 	$currentstring=&Apache::lonxml::endredirection();
                   1407: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 
                   1408: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/; 
                   1409: 	$currentstring=~s/(\S)\s*$/$1\}/;
                   1410:     }
                   1411:     return $currentstring;
                   1412: }
                   1413: 
1.181     sakharuk 1414: #-- <s> tag (end tag required)
1.122     albertel 1415: sub start_s {
                   1416:     my ($target,$token) = @_;
                   1417:     my $currentstring = '';
                   1418:     if ($target eq 'web') {
                   1419: 	$currentstring .= $token->[4];
                   1420:     } elsif ($target eq 'tex') {
                   1421: 	&Apache::lonxml::startredirection();
                   1422:     } 
                   1423:     return $currentstring;
                   1424: }
                   1425: 
                   1426: sub end_s {
                   1427:     my ($target,$token) = @_;
                   1428:     my $currentstring = '';
                   1429:     if ($target eq 'web') {
                   1430: 	$currentstring .= $token->[2];
                   1431:     } elsif ($target eq 'tex') {
                   1432: 	$currentstring=&Apache::lonxml::endredirection();
                   1433: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1434: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1435: 	$currentstring=~s/(\S)\s*$/$1\}/;	
                   1436:     }
                   1437:     return $currentstring;
                   1438: }
                   1439: 
1.181     sakharuk 1440: #-- <sub> tag (end tag required)
1.122     albertel 1441: sub start_sub {
                   1442:     my ($target,$token) = @_;
                   1443:     my $currentstring = '';
                   1444:     if ($target eq 'web') {
                   1445: 	$currentstring .= $token->[4];
                   1446:     } elsif ($target eq 'tex') {
1.202     sakharuk 1447: 	$currentstring .= '\ensuremath{_{';
1.122     albertel 1448:     } 
                   1449:     return $currentstring;
                   1450: }
                   1451: 
                   1452: sub end_sub {
                   1453:     my ($target,$token) = @_;
                   1454:     my $currentstring = '';
                   1455:     if ($target eq 'web') {
                   1456: 	$currentstring .= $token->[2];
                   1457:     } elsif ($target eq 'tex') {
1.202     sakharuk 1458: 	$currentstring .= '}}';
1.122     albertel 1459:     }
                   1460:     return $currentstring;
                   1461: }
                   1462: 
1.181     sakharuk 1463: #-- <sup> tag (end tag required)
1.122     albertel 1464: sub start_sup {
                   1465:     my ($target,$token) = @_;
                   1466:     my $currentstring = '';
                   1467:     if ($target eq 'web') {
                   1468: 	$currentstring .= $token->[4];
                   1469:     } elsif ($target eq 'tex') {
1.202     sakharuk 1470: 	$currentstring .= '\ensuremath{^{';
1.122     albertel 1471:     } 
                   1472:     return $currentstring;
                   1473: }
                   1474: 
                   1475: sub end_sup {
                   1476:     my ($target,$token) = @_;
                   1477:     my $currentstring = '';
                   1478:     if ($target eq 'web') {
                   1479: 	$currentstring .= $token->[2];
                   1480:     } elsif ($target eq 'tex') {
1.202     sakharuk 1481: 	$currentstring .= '}}';
1.122     albertel 1482:     }
                   1483:     return $currentstring;
                   1484: }
                   1485: 
1.181     sakharuk 1486: #-- <hr> tag (end tag forbidden)
1.122     albertel 1487: sub start_hr {
1.124     sakharuk 1488:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1489:     my $currentstring = &end_p();	# End enclosing para.
1.122     albertel 1490:     if ($target eq 'web') {
                   1491: 	$currentstring .= $token->[4];
                   1492:     } elsif ($target eq 'tex') {
1.149     sakharuk 1493: 	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.124     sakharuk 1494: 	if (defined $LaTeXwidth) {
                   1495: 	    if ($LaTeXwidth=~/^%/) {
                   1496: 		substr($LaTeXwidth,0,1)='';
                   1497: 		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
                   1498: 	    }
                   1499: 	} else {
1.148     sakharuk 1500: 	    $LaTeXwidth ='0.9\textwidth';
1.124     sakharuk 1501: 	}
                   1502: 	my ($pre,$post);
                   1503: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1504: 	if (($align eq 'center') || (not defined $align)) {
                   1505: 	    $pre=''; $post='';
                   1506: 	} elsif ($align eq 'left') {
                   1507: 	    $pre='\rlap{'; $post='} \hfill';
                   1508: 	} elsif ($align eq 'right') {
                   1509: 	    $pre=' \hfill \llap{'; $post='}';
                   1510: 	}
1.148     sakharuk 1511: 	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1.124     sakharuk 1512:                                     $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1.122     albertel 1513:     } 
                   1514:     return $currentstring;
                   1515: }
                   1516: 
                   1517: sub end_hr {
                   1518:     my ($target,$token) = @_;
                   1519:     my $currentstring = '';
                   1520:     if ($target eq 'web') {
                   1521: 	$currentstring .= $token->[2];
1.148     sakharuk 1522:     }
1.122     albertel 1523:     return $currentstring;
                   1524: }
                   1525: 
1.181     sakharuk 1526: #-- <div> tag (end tag required)
1.280     foxr     1527: {
                   1528: 
                   1529: #  Since div can be nested, the stack below is used
                   1530: #  in 'tex' mode to store the ending strings
                   1531: #  for the div stack.
                   1532: 
                   1533:     my @div_end_stack;
                   1534: 
1.122     albertel 1535: sub start_div {
1.280     foxr     1536:     my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1.279     foxr     1537:     my $currentstring = &end_p();	# Close enclosing para.
1.122     albertel 1538:     if ($target eq 'web') {
                   1539: 	$currentstring .= $token->[4];
                   1540:     } 
1.280     foxr     1541:     if ($target eq 'tex') {
                   1542: 	# 4 possible alignments: left, right, center, and -missing-.
                   1543: 
                   1544: 	my $endstring = '';
                   1545: 
                   1546: 	my $align = lc(&Apache::lonxml::get_param('align', $parstack,
                   1547: 						  $safeeval, undef, 1));
                   1548: 	if ($align eq 'center') {
                   1549: 	    $currentstring .= '\begin{center}';
                   1550: 	    $endstring      = '\end{center}';
1.309     albertel 1551: 	    if (&is_inside_of($tagstack, "table")) {
                   1552: 		$currentstring = &center_correction().$currentstring;
                   1553: 	    }
1.280     foxr     1554: 	}
                   1555: 	elsif ($align eq 'right') {
                   1556: 	    $currentstring .= '\begin{flushright}';
                   1557: 	    $endstring     .= '\end{flushright}';
                   1558: 	} elsif ($align eq 'left') {
                   1559: 	    $currentstring .= '\begin{flushleft}';
                   1560: 	    $endstring     = '\end{flushleft}';
                   1561: 	} else {
                   1562: 	
                   1563: 	}
                   1564: 	$currentstring .= "\n";   # For human readability.
                   1565: 	$endstring       = "\n$endstring\n"; # For human readability
                   1566: 	push(@div_end_stack, $endstring);
                   1567:     }
1.122     albertel 1568:     return $currentstring;
                   1569: }
                   1570: 
                   1571: sub end_div {
                   1572:     my ($target,$token) = @_;
                   1573:     my $currentstring = '';
                   1574:     if ($target eq 'web') {
                   1575: 	$currentstring .= $token->[2];
1.280     foxr     1576:     }
                   1577:     if ($target eq 'tex') {
                   1578: 	my $endstring = pop @div_end_stack;
                   1579: 	$currentstring .= $endstring;
                   1580:     }
1.122     albertel 1581:     return $currentstring;
                   1582: }
1.280     foxr     1583: }
1.122     albertel 1584: 
1.181     sakharuk 1585: #-- <a> tag (end tag required)
1.122     albertel 1586: sub start_a {
1.149     sakharuk 1587:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1588:     my $currentstring = '';
                   1589:     if ($target eq 'web') {
1.250     albertel 1590: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   1591: 					    undef,1);
                   1592: 	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1.122     albertel 1593:     } elsif ($target eq 'tex') {
1.149     sakharuk 1594: 	my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1.161     sakharuk 1595: 	my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
                   1596: 	if ($a=~/\S/) {
                   1597: 	    $a=~s/([^\\])%/$1\\\%/g;
                   1598: 	    $currentstring .= '\ref{URI: '.$a.'}';
                   1599: 	} elsif ($b=~/\S/) {
                   1600: 	    $currentstring .= '\ref{Anchor: '.$b.'}';
                   1601: 	} else {
                   1602: 	    $currentstring.='';
                   1603: 	}
1.122     albertel 1604:     }
                   1605:     return $currentstring;
                   1606: }
                   1607: 
                   1608: sub end_a {
1.168     albertel 1609:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1610:     my $currentstring = '';
                   1611:     if ($target eq 'web') {
                   1612: 	$currentstring .= $token->[2];
                   1613:     }
                   1614:     return $currentstring;
                   1615: }
                   1616: 
1.181     sakharuk 1617: #-- <li> tag (end tag optional)
1.122     albertel 1618: sub start_li {
1.168     albertel 1619:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1620:     my $currentstring = '';
                   1621:     if ($target eq 'web') {
                   1622: 	$currentstring = $token->[4];     
                   1623:     } elsif ($target eq 'tex') {
1.237     sakharuk 1624: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1625: 	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1.238     albertel 1626: 	#FIXME need to support types i and I 
                   1627: 	if ($type=~/disc/) {
                   1628: 	    $currentstring .= ' \item[$\bullet$] ';
                   1629: 	} elsif ($type=~/circle/) {
                   1630: 	    $currentstring .= ' \item[$\circ$] ';
1.146     sakharuk 1631: 	} elsif ($type=~/square/) {
1.238     albertel 1632: 	    $currentstring .= ' \item[$\diamond$] ';
                   1633: 	} elsif ($type eq '1') {
                   1634: 	    $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1.237     sakharuk 1635: 	} elsif ($type eq 'A') {
1.238     albertel 1636: 	    $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
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 ($value ne '') {
                   1640: 	    $currentstring .= ' \item['.$value.'] ';
1.122     albertel 1641: 	} else {
1.146     sakharuk 1642: 	    $currentstring .= ' \item ';
1.122     albertel 1643: 	}  
1.238     albertel 1644: 	$Apache::londefdef::list_index++;
                   1645:     }
1.122     albertel 1646:     return $currentstring;
                   1647: }
                   1648: 
                   1649: sub end_li {
                   1650:     my ($target,$token) = @_;
1.279     foxr     1651:     my $currentstring = &end_p();	# In case there's a <p> in the <li>
1.122     albertel 1652:     if ($target eq 'web') {
1.277     foxr     1653: 	$currentstring .= $token->[2];     
1.122     albertel 1654:     } 
                   1655:     return $currentstring;
                   1656: }
                   1657: 
1.181     sakharuk 1658: #-- <u> tag (end tag required)
1.122     albertel 1659: sub start_u {
                   1660:     my ($target,$token) = @_;
                   1661:     my $currentstring = '';
                   1662:     if ($target eq 'web') {
                   1663: 	$currentstring .= $token->[4];
                   1664:     } elsif ($target eq 'tex') {
                   1665: 	&Apache::lonxml::startredirection();
                   1666:     } 
                   1667:     return $currentstring;
                   1668: }
                   1669: 
                   1670: sub end_u {
                   1671:     my ($target,$token) = @_;
                   1672:     my $currentstring = '';
                   1673:     if ($target eq 'web') {
                   1674: 	$currentstring .= $token->[2];
                   1675:     } elsif ($target eq 'tex') {
                   1676: 	$currentstring=&Apache::lonxml::endredirection();
                   1677: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1678: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1679: 	$currentstring=~s/(\S)\s*$/$1\}/;		
                   1680:     }
                   1681:     return $currentstring;
                   1682: }
                   1683: 
1.181     sakharuk 1684: #-- <ul> tag (end tag required)
1.122     albertel 1685: sub start_ul {
1.125     sakharuk 1686:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1687:     my $currentstring = &end_p();	# Close off enclosing list.
1.122     albertel 1688:     if ($target eq 'web') {
1.277     foxr     1689: 	$currentstring .= $token->[4];     
1.122     albertel 1690:     } elsif ($target eq 'tex') {
1.125     sakharuk 1691: 	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1.238     albertel 1692: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1693: 	if ($TeXtype eq 'disc') {
1.222     sakharuk 1694: 	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                   1695:                               '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1696:                               '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1697:                               '\renewcommand{\labelitemiv}{$\bullet$}';
1.125     sakharuk 1698: 	} elsif ($TeXtype eq 'circle') {
1.222     sakharuk 1699: 	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                   1700:                               '\renewcommand{\labelitemii}{$\circ$}'. 
                   1701:                               '\renewcommand{\labelitemiii}{$\circ$}'.
                   1702:                               '\renewcommand{\labelitemiv}{$\circ$}';
1.125     sakharuk 1703: 	} elsif ($TeXtype eq 'square') {
1.222     sakharuk 1704: 	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                   1705:                               '\renewcommand{\labelitemii}{$\diamond$}'. 
                   1706:                               '\renewcommand{\labelitemiii}{$\diamond$}'.
                   1707:                               '\renewcommand{\labelitemiv}{$\diamond$}';
1.125     sakharuk 1708: 	}
1.222     sakharuk 1709: 	$currentstring .= '\strut \begin{itemize}';  
1.122     albertel 1710:     } 
                   1711:     return $currentstring;
                   1712: }
                   1713: 
                   1714: sub end_ul {
                   1715:     my ($target,$token) = @_;
                   1716:     my $currentstring = '';
                   1717:     if ($target eq 'web') {
                   1718: 	$currentstring = $token->[2];     
                   1719:     } elsif ($target eq 'tex') {
1.222     sakharuk 1720: 	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                   1721:                                '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1722:                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1723:                                '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
1.122     albertel 1724:     } 
                   1725:     return $currentstring;
                   1726: }
                   1727: 
1.181     sakharuk 1728: #-- <menu> tag (end tag required)
1.122     albertel 1729: sub start_menu {
                   1730:     my ($target,$token) = @_;
                   1731:     my $currentstring = '';
                   1732:     if ($target eq 'web') {
                   1733: 	$currentstring = $token->[4];     
                   1734:     } elsif ($target eq 'tex') {
                   1735: 	$currentstring = " \\begin{itemize} ";  
                   1736:     } 
                   1737:     return $currentstring;
                   1738: }
                   1739: 
                   1740: sub end_menu {
                   1741:     my ($target,$token) = @_;
                   1742:     my $currentstring = '';
                   1743:     if ($target eq 'web') {
                   1744: 	$currentstring = $token->[2];     
                   1745:     } elsif ($target eq 'tex') {
                   1746: 	$currentstring = " \\end{itemize}";  
                   1747:     } 
                   1748:     return $currentstring;
                   1749: }
                   1750: 
1.181     sakharuk 1751: #-- <dir> tag (end tag required)
1.122     albertel 1752: sub start_dir {
                   1753:     my ($target,$token) = @_;
1.279     foxr     1754:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.122     albertel 1755:     if ($target eq 'web') {
1.277     foxr     1756: 	$currentstring .= $token->[4];     
1.122     albertel 1757:     } elsif ($target eq 'tex') {
1.277     foxr     1758: 	$currentstring .= " \\begin{itemize} ";  
1.122     albertel 1759:     } 
                   1760:     return $currentstring;
                   1761: }
                   1762: 
                   1763: sub end_dir {
                   1764:     my ($target,$token) = @_;
                   1765:     my $currentstring = '';
                   1766:     if ($target eq 'web') {
                   1767: 	$currentstring = $token->[2];     
                   1768:     } elsif ($target eq 'tex') {
                   1769: 	$currentstring = " \\end{itemize}";  
                   1770:     } 
                   1771:     return $currentstring;
                   1772: }
                   1773: 
1.181     sakharuk 1774: #-- <ol> tag (end tag required)
1.122     albertel 1775: sub start_ol {
1.125     sakharuk 1776:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1777:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.122     albertel 1778:     if ($target eq 'web') {
1.277     foxr     1779: 	$currentstring .= $token->[4];     
1.122     albertel 1780:     } elsif ($target eq 'tex') {
1.238     albertel 1781: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1782: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1783: 	if ($type eq '1') {
1.222     sakharuk 1784: 	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1785:                               '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                   1786:                               '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1787:                               '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1.125     sakharuk 1788: 	} elsif ($type eq 'A') {
1.222     sakharuk 1789: 	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                   1790:                               '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                   1791:                               '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                   1792:                               '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1.125     sakharuk 1793: 	} elsif ($type eq 'a') {
1.222     sakharuk 1794: 	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                   1795:                               '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                   1796:                               '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                   1797:                               '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1.125     sakharuk 1798: 	} elsif ($type eq 'i') {
1.222     sakharuk 1799: 	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                   1800:                               '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                   1801:                               '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                   1802:                               '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1.125     sakharuk 1803: 	} elsif ($type eq 'I') {
1.222     sakharuk 1804: 	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                   1805:                               '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                   1806:                               '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                   1807:                               '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1.125     sakharuk 1808: 	}
1.222     sakharuk 1809: 	$currentstring .= '\strut \begin{enumerate}';  
1.122     albertel 1810:     } 
                   1811:     return $currentstring;
                   1812: }
                   1813: 
                   1814: sub end_ol {
                   1815:     my ($target,$token) = @_;
                   1816:     my $currentstring = '';
                   1817:     if ($target eq 'web') {
                   1818: 	$currentstring = $token->[2];     
                   1819:     } elsif ($target eq 'tex') {
1.222     sakharuk 1820: 	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1821:                                         '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                   1822:                                         '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1823:                                         '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
1.122     albertel 1824:     } 
                   1825:     return $currentstring;
                   1826: }
                   1827: 
1.181     sakharuk 1828: #-- <dl> tag (end tag required)
1.122     albertel 1829: sub start_dl {
                   1830:     my ($target,$token) = @_;
1.279     foxr     1831:     my $currentstring = &end_p();	# In case there's a <p> unclosed prior to the list.
1.122     albertel 1832:     if ($target eq 'web') {
1.277     foxr     1833: 	$currentstring .= $token->[4];     
1.122     albertel 1834:     } elsif ($target eq 'tex') {
1.277     foxr     1835: 	$currentstring .= '\begin{description}';
1.243     albertel 1836: 	$Apache::londefdef::DL++;
                   1837: 	push(@Apache::londefdef::description,[]);
                   1838: 	$Apache::londefdef::DD[$Apache::londefdef::DL]=0;
                   1839: 	$Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1.244     albertel 1840: 	$Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1.122     albertel 1841:     } 
                   1842:     return $currentstring;
                   1843: }
                   1844: 
                   1845: sub end_dl {
1.174     sakharuk 1846:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1847:     my $currentstring = '';
                   1848:     if ($target eq 'web') {
                   1849: 	$currentstring = $token->[2];     
                   1850:     } elsif ($target eq 'tex') {
1.243     albertel 1851: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1852: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
                   1853: 	foreach my $element (@{$Apache::londefdef::description[-1]}) {
1.174     sakharuk 1854: 	    $currentstring.=' '.$element.' ';
                   1855: 	}
1.243     albertel 1856: 	pop(@Apache::londefdef::description);
1.174     sakharuk 1857: 	$currentstring.='\end{description}';  
1.243     albertel 1858: 	delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
                   1859: 	delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1.244     albertel 1860: 	delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1.243     albertel 1861: 	$Apache::londefdef::DL--;
1.122     albertel 1862:     } 
                   1863:     return $currentstring;
                   1864: }
                   1865: 
1.172     sakharuk 1866: #-- <dt> tag (end tag optional)
1.122     albertel 1867: sub start_dt {
1.172     sakharuk 1868:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1869:     my $currentstring='';
1.122     albertel 1870:     if ($target eq 'web') {
                   1871: 	$currentstring = $token->[4];     
                   1872:     } elsif ($target eq 'tex') {
1.243     albertel 1873: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1874: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1.174     sakharuk 1875: 	&Apache::lonxml::startredirection();
1.243     albertel 1876: 	$Apache::londefdef::DT[-1]++;
1.244     albertel 1877: 	$Apache::londefdef::seenDT[-1]=1;
1.122     albertel 1878:     } 
                   1879:     return $currentstring;
                   1880: }
                   1881: 
                   1882: sub end_dt {
1.172     sakharuk 1883:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1884:     my $currentstring = '';
                   1885:     if ($target eq 'web') {
                   1886: 	$currentstring = $token->[2];    
                   1887:     } elsif ($target eq 'tex') {
1.243     albertel 1888: 	if ($Apache::londefdef::DT[-1]) {
                   1889: 	    my $data=&item_cleanup();
1.244     albertel 1890: 	    push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1.243     albertel 1891: 	    $Apache::londefdef::DT[-1]--;
                   1892: 	}
1.122     albertel 1893:     } 
                   1894:     return $currentstring;
                   1895: }
                   1896: 
1.173     sakharuk 1897: sub item_cleanup {
1.174     sakharuk 1898:     my $item=&Apache::lonxml::endredirection();
1.173     sakharuk 1899:     $item=~s/\\begin{center}//g;
                   1900:     $item=~s/\\end{center}//g;
                   1901:     return $item;
                   1902: }
                   1903: 
1.181     sakharuk 1904: #-- <dd> tag (end tag optional)
1.122     albertel 1905: sub start_dd {
1.147     sakharuk 1906:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1907:     my $currentstring = '';
                   1908:     if ($target eq 'web') {
                   1909: 	$currentstring = $token->[4];     
1.147     sakharuk 1910:     } elsif ($target eq 'tex') {
1.243     albertel 1911: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1912: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1.244     albertel 1913: 	if (!$Apache::londefdef::seenDT[-1]) {
                   1914: 	    push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
                   1915: 	}
1.243     albertel 1916: 	push(@{$Apache::londefdef::description[-1]},'');
                   1917: 	$Apache::londefdef::description[-1]->[-1].=' \strut ';
                   1918: 	$Apache::londefdef::DD[-1]++;
1.174     sakharuk 1919: 	&Apache::lonxml::startredirection();
1.122     albertel 1920:     } 
                   1921:     return $currentstring;
                   1922: }
                   1923: 
                   1924: sub end_dd {
1.174     sakharuk 1925:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1926:     my $currentstring = '';
                   1927:     if ($target eq 'web') {
                   1928: 	$currentstring = $token->[2];    
1.174     sakharuk 1929:     }  elsif ($target eq 'tex') {
1.243     albertel 1930: 	$Apache::londefdef::description[-1]->[-1].=
                   1931: 	    &Apache::lonxml::endredirection().' \vskip 0mm ';
                   1932: 	$Apache::londefdef::DD[-1]--;
1.174     sakharuk 1933:     }
1.122     albertel 1934:     return $currentstring;
                   1935: }
                   1936: 
1.181     sakharuk 1937: #-- <table> tag (end tag required)
1.277     foxr     1938: #       <table> also ends any prior <p> that is not closed.
                   1939: #               but, unless I allow <p>'s to nest, that's the
                   1940: #               only way I could think of to allow <p> in 
                   1941: #               <tr> <th> bodies
                   1942: #
1.206     sakharuk 1943: #list of supported attributes: border,width,TeXwidth
1.91      sakharuk 1944: sub start_table {
                   1945:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.277     foxr     1946:     my $textwidth = '';
1.279     foxr     1947:     my $currentstring = &end_p();
1.91      sakharuk 1948:     if ($target eq 'web') {
1.277     foxr     1949: 	$currentstring .= $token->[4];     
1.91      sakharuk 1950:     } elsif ($target eq 'tex') {
                   1951: 	my $aa = {};
                   1952: 	push @Apache::londefdef::table, $aa; 
                   1953: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 1954:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 1955: 	if ($#Apache::londefdef::table==0) {
1.267     albertel 1956: 	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1.206     sakharuk 1957: 	    $textwidth=~/(\d+\.?\d*)/;
                   1958: 	    $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
                   1959: 	} else {
                   1960: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   1961: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   1962: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   1963: 	    } else {
                   1964:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 1965: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 1966: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   1967: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   1968: 		}
                   1969: 	    }
                   1970: 	}
1.294     foxr     1971: 
                   1972: 	# width either comes forced from the TeXwidth or the width parameters.
                   1973: 	# in either case it can be a percentage or absolute width.
1.311     albertel 1974: 	# in the width case we ignore absolute width 
1.126     sakharuk 1975: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.308     albertel 1976: 	if (!defined($TeXwidth)) {
1.311     albertel 1977: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
                   1978: 						       $safeeval,undef,1);
                   1979: 	    if ($htmlwidth =~ /%/) {
                   1980: 		$TeXwidth = $htmlwidth;
                   1981: 	    } else { 
                   1982: 		$TeXwidth = $textwidth;
                   1983: 	    }
1.294     foxr     1984: 	} else {
                   1985: 	    $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
                   1986: 	}
                   1987: 	if ($TeXwidth=~/%/) {
1.203     sakharuk 1988: 	    $Apache::londefdef::table[-1]{'percent'}=1;
1.126     sakharuk 1989: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 1990:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 1991: 	} else {
1.206     sakharuk 1992: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.316     foxr     1993: 	}
                   1994:         #  In the end, however the table width cannot be wider than $textwidth...
                   1995: 	
                   1996: 	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
                   1997: 	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
                   1998: 	}
1.294     foxr     1999: 
1.126     sakharuk 2000:         #table's border
1.206     sakharuk 2001: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 2002:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 2003: 	unless (defined $border) { $border = 0; }
                   2004: 	if ($border) { 
                   2005: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   2006: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2007: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   2008: 	} else {
                   2009: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   2010: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2011: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   2012: 	}
1.206     sakharuk 2013: 	if ($#Apache::londefdef::table==0) {
1.281     foxr     2014: 	    #    Note that \newline seems to destroy the alignment envs.
                   2015: 	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
                   2016: 	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 2017: 	}
                   2018: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   2019:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   2020:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 2021:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 2022:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   2023:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   2024:         $Apache::londefdef::table[-1]{'content'}=[];
                   2025:         $Apache::londefdef::table[-1]{'align'}=[];
1.277     foxr     2026:         $currentstring.='\keephidden{NEW TABLE ENTRY}';
1.295     foxr     2027: 
1.294     foxr     2028: 
                   2029:     }
1.91      sakharuk 2030:     return $currentstring;
                   2031: }
1.122     albertel 2032:  
                   2033: sub end_table {
                   2034:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2035:     my $currentstring = '';
                   2036:     if ($target eq 'web') {
                   2037: 	$currentstring = $token->[2];     
                   2038:     } elsif ($target eq 'tex') {
                   2039: 	my $inmemory = '';
                   2040: 	my $output = '';
1.206     sakharuk 2041: 	my $WARNING='';
                   2042:         #width of columns from TeXwidth attributes
1.294     foxr     2043: 
1.206     sakharuk 2044: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2045: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2046: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   2047: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   2048: 		}	
                   2049: 	    }
                   2050: 	}
                   2051:         #free space and number of empty columns
                   2052: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 2053: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 2054: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2055: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   2056: 		$empty_columns++;
                   2057: 	    } else {
                   2058: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   2059: 	    }
                   2060: 	}
                   2061:         #boundaries for contents columns
                   2062: 	my @min_len=();#columns can not be narrower 
                   2063: 	my @max_len=();#maximum length of column
                   2064: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2065: 		my ($localmin,$localmax)=(0,0);
                   2066: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2067: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   2068: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   2069: 		    }
                   2070: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   2071: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   2072: 		    }
                   2073: 		}
                   2074: 		push @min_len, $localmin;
                   2075: 		push @max_len, $localmax;
1.122     albertel 2076: 	}
1.206     sakharuk 2077: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2078: 	    my $localmin=0,;
                   2079: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2080: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   2081: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   2082: 		}
                   2083: 	    }
1.229     sakharuk 2084: 	    if ($max_len[$jn]<$localmin) {
                   2085: 		$max_len[$jn]=$localmin;
                   2086: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2087: 	    }#object size is bigger
                   2088: 	    if ($min_len[$jn]<$localmin) {
                   2089: 		$min_len[$jn]=$localmin;
                   2090: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2091: 	    }#object size is bigger
1.206     sakharuk 2092: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   2093: 		$min_len[$jn]=0;
                   2094: 		$max_len[$jn]=0;
                   2095: 	    }
                   2096: 	}
                   2097:        #final adjustment of column width
                   2098: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   2099: 	my @adjust=();
                   2100:         #step 1. adjustment by maximum value
                   2101: 	my $space_neeeded=0;
                   2102: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2103: 	    $space_neeeded=$space_neeeded+$max_len[$jn];
                   2104: 	}
                   2105: 	if ($space_neeeded<=$available_space) {
                   2106: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2107: 		if ($fwidth[$jn]==0) {
                   2108: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 2109: 		}
1.51      sakharuk 2110: 	    }
1.206     sakharuk 2111: 	} else {
                   2112:         #step 2. adjustment by minimum value (estimation)
                   2113: 	    $space_neeeded=0;
                   2114: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2115: 		$space_neeeded+=$min_len[$jn];
                   2116: 	    }
                   2117: 	    if ($space_neeeded>$available_space) {
                   2118: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   2119: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2120: 		    if ($fwidth[$jn]==0) {
                   2121: 			$fwidth[$jn]=$min_len[$jn];
                   2122: 		    }
                   2123: 		}
1.229     sakharuk 2124: 		#check if we have objects which can be scaled
                   2125: 		my $how_many_to_scale=0;
                   2126: 		my @to_scale=();
                   2127: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2128: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   2129: 			$how_many_to_scale++;
                   2130: 			push @to_scale, $jn;
                   2131: 		    }
                   2132: 		}
                   2133: 		if ($how_many_to_scale>0) {
                   2134: 		    my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
                   2135: 		    foreach my $jn (@to_scale) {
                   2136: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2137: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   2138: 			    if ($1 ne '') {
                   2139: 				my $current_length=&recalc($1);
                   2140: 				$current_length=~/(\d+\.?\d*)/;
                   2141: 				$current_length=$current_length-$space_to_adjust;
                   2142: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   2143: 			    }
                   2144: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   2145: 			    if ($1 ne '') {
                   2146: 				my $current_length=$1;
                   2147: 				$current_length=$current_length-$space_to_adjust;
                   2148: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   2149: 			    }				
                   2150: 			}
                   2151: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   2152: 		    }
                   2153: 		}
1.206     sakharuk 2154: 	    } else {
                   2155: 	      #step 3. adjustment over minimal + corrections
                   2156: 		my $enlarge_coef=$available_space/$space_neeeded;
                   2157: 		my $acsessive=0;
                   2158: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2159: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2160: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2161: 			$fwidth[$jn]=$max_len[$jn];
                   2162: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2163: 			$adjust[$jn]=0;
                   2164: 		    }
                   2165: 		}
                   2166: 		if ($acsessive>0) {
                   2167: 		#we have an excess of space and can redistribute it
                   2168: 		    my $notempty_columns=0;
                   2169: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2170: 			if ($adjust[$jn]!=0) {
                   2171: 			    $notempty_columns++;
                   2172: 			}
                   2173: 		    }
                   2174: 		    my $per_column=$acsessive/$notempty_columns;
                   2175: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2176: 			if ($adjust[$jn]!=0) {
                   2177: 			    $adjust[$jn]+=$per_column;
                   2178: 			    $fwidth[$jn]=$adjust[$jn];
                   2179: 			}
1.223     sakharuk 2180: 		    }
                   2181: 		} else {
                   2182: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2183: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2184: 		    }
                   2185: 		}
1.203     sakharuk 2186: 	    }
                   2187: 	}
1.222     sakharuk 2188:         #use all available width if it is defined in % or as TeXwidth
                   2189:         if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
1.203     sakharuk 2190: 	    my $current=0; 
1.206     sakharuk 2191: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2192: 		$current+=$fwidth[$i];
1.203     sakharuk 2193: 	    }
                   2194: 	    my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
1.206     sakharuk 2195: 	    for (my $i=0;$i<=$#fwidth;$i++) {  
                   2196: 		$fwidth[$i]*=$coef;
                   2197: 	    }
                   2198: 	}
                   2199:         #removing of empty columns if allowed
1.208     sakharuk 2200:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2201: 	if ($permission eq 'yes') {
                   2202: 	    my @cleaned_table=();
                   2203:             my @cleaned_header=();
                   2204: 	    my $colind=0;
                   2205: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2206: 		if ($fwidth[$jn]!=0) {
                   2207: 		    #we need to copy column
                   2208: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2209: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2210: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2211: 		    }
                   2212: 		    $colind++;
                   2213: 		}
1.122     albertel 2214: 	    }
1.206     sakharuk 2215: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2216: 	    @fwidth=@cleaned_header;
1.122     albertel 2217: 	}
1.206     sakharuk 2218: 	#construct header of the table
                   2219: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2220: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2221: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2222: 	}
                   2223: 	$header_of_table .= '}';
1.126     sakharuk 2224: 	#fill the table
                   2225: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.306     foxr     2226: 	    my $have_rowspan = 0;
1.206     sakharuk 2227: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
1.320     foxr     2228: 
                   2229: 		#-----------------------------------------------------------
                   2230:                 #   I think this order of doing things will ensure that
                   2231: 		#   single rowspan, columspan and combined row/colspans will
                   2232:                 #   work correctly.  LaTeX is delicate here.
                   2233: 		#    RF.
                   2234: 
                   2235: 		# Start a rowspan if necessary:
                   2236: 
                   2237: 		my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
                   2238: 		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
1.304     foxr     2239: 		#
                   2240: 		#  Do the appropriate magic if this has a colspan
                   2241: 		# 
1.320     foxr     2242: 
1.304     foxr     2243: 		if ($colspan > 1) {
                   2244: 		    $output .= '\multicolumn{'.
                   2245: 			$colspan
                   2246: 			.'}{|l|}{';
                   2247: 		}
1.306     foxr     2248: 
                   2249: 		if ($rowspan > 1) {
                   2250: 		    $have_rowspan++;
                   2251: 		    $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
                   2252: 		}
                   2253: 		if (($rowspan eq '^') || ($rowspan eq '_')) {
                   2254: 		    $have_rowspan++;
                   2255: 		}
1.320     foxr     2256: 		#--------------------------------------------------------------
1.306     foxr     2257: 
1.206     sakharuk 2258: 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.309     albertel 2259: 		    $output.=&center_correction().'\begin{center}';
1.206     sakharuk 2260: 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2261: 		    $output.=' \hfill \llap{'
                   2262: 		}
                   2263: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2264: 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.314     albertel 2265: 		    $output.='\end{center}';
1.206     sakharuk 2266: 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
                   2267: 		    $output.='} ';
                   2268: 		}
1.306     foxr     2269: 		# Close off any open multirow:
                   2270: 		
                   2271: 		if ($rowspan > 1) {
                   2272: 		    $output .= '}';
                   2273: 		}
1.304     foxr     2274: 		#  Close off the colspan...
                   2275: 		#
                   2276: 		if ($colspan > 1)  {
                   2277: 		    $output .= '}';
                   2278: 		    $jn += $colspan-1; # Adjust for number of rows really left.
                   2279: 		}
1.206     sakharuk 2280:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2281: 	    }
1.306     foxr     2282: 	    #  If have_rowspan > 0, and borders are on, then 
                   2283: 	    #  we need to do more than put an \hline at the bottom of row.
                   2284: 	    #  we need to do the appropriate \cline to ensure that
                   2285: 	    #  the spanned rows don't have \hlines through them.
                   2286: 
                   2287: 	    if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
                   2288: 		$output .= ' \\\\ ';
                   2289: 		for (my $jn=0; $jn<=$#fwidth;$jn++) {
                   2290: 		    my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
1.320     foxr     2291: 		    if ($rowspan ne "^") {
                   2292: 			if (($rowspan <= 1) || ($rowspan eq '_')) {
                   2293: 			    my $column = $jn+1;
                   2294: 			    $output .= '\cline{'.$column.'-'.$column.'} ';
                   2295: 			}
1.306     foxr     2296: 		    }
                   2297: 		}
                   2298: 
                   2299: 	    } else {
                   2300: 		$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
                   2301: 	    }
1.122     albertel 2302: 	}
1.281     foxr     2303: 	# Note that \newline destroys alignment env's produced  by e.g. <div>
                   2304: 	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
                   2305: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
1.127     sakharuk 2306: 	if ($#Apache::londefdef::table > 0) {	    
                   2307: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
1.294     foxr     2308: 	    # Figure out max/and min width  by summing us and then
                   2309: 	    # apply that to the current column of the table we nest in
                   2310: 	    # if it's larger than the current width or the current width
                   2311: 	    # is undefined.
                   2312: 	    #
                   2313: 	    my $min_nested_width = 0;
                   2314: 	    my $max_nested_width = 0;
                   2315: 	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
                   2316: 		$min_nested_width +=  $min_len[$col];
                   2317: 		$max_nested_width +=  $max_len[$col];
1.300     foxr     2318: 		
1.294     foxr     2319: 	    }
                   2320: 	    # Fudge in an extra 5 mm for borders etc:
                   2321: 	    
                   2322: 	    $min_nested_width += 5;
                   2323: 	    $max_nested_width += 5;
                   2324: 
                   2325: 	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
                   2326: 	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
                   2327: 	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
                   2328: 		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
                   2329: 	    }
                   2330: 	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
                   2331: 		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
                   2332: 	    }
                   2333: 
1.127     sakharuk 2334: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2335: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2336: 	} else {
                   2337: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2338: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2339: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2340: 	}
1.122     albertel 2341:     }
                   2342:     return $currentstring;
                   2343: }
                   2344: 
1.166     sakharuk 2345: #-- <tr> tag (end tag optional)
1.122     albertel 2346: sub start_tr {
                   2347:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2348:     my $currentstring = '';
                   2349:     if ($target eq 'web') {
                   2350: 	$currentstring = $token->[4];     
                   2351:     } elsif ($target eq 'tex') {
                   2352: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2353: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2354: 	if ($alignchar ne '') {
1.206     sakharuk 2355: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2356: 	} else {
                   2357: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2358: 	}
                   2359: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
1.300     foxr     2360: 	#
                   2361: 	#  Need to save the number of table columns to preserve the max # columns.
                   2362: 	#
                   2363: 	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
1.122     albertel 2364: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2365: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2366: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2367: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2368: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2369: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.122     albertel 2370:     } 
                   2371:     return $currentstring;
                   2372: }
                   2373:         
                   2374: sub end_tr {
1.160     sakharuk 2375:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2376:     my $currentstring = &end_p();	# Close any pending <p> in the row.
1.122     albertel 2377:     if ($target eq 'web') {
1.277     foxr     2378: 	$currentstring .= $token->[2];     
1.122     albertel 2379:     } elsif ($target eq 'tex') {
1.160     sakharuk 2380: 	if ($Apache::londefdef::TD_redirection) {
                   2381: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2382: 	}
1.300     foxr     2383: 	# Counter columns must be the maximum number of columns seen
                   2384: 	# in the table so far so:
                   2385: 	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
                   2386: 	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
                   2387: 	}
1.295     foxr     2388: 
                   2389: 
1.294     foxr     2390: 	
1.122     albertel 2391:     }
                   2392:     return $currentstring;
                   2393: }
                   2394: 
1.166     sakharuk 2395: #-- <td> tag (end tag optional)
1.122     albertel 2396: sub start_td {
                   2397:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2398:     my $currentstring = '';
                   2399:     if ($target eq 'web') {
                   2400: 	$currentstring = $token->[4];     
                   2401:     } elsif ($target eq 'tex') {
1.160     sakharuk 2402: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2403: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2404:     } 
                   2405:     return $currentstring;
                   2406: }   
1.159     sakharuk 2407:     
                   2408: sub tag_check {
                   2409:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2410:     my @ar=@$parstack; 
                   2411:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2412: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2413: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2414: 	    last;
                   2415: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2416: 	    splice @ar, $i+1;
                   2417: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2418: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2419: 	    last;
1.159     sakharuk 2420: 	}
1.160     sakharuk 2421:     }
1.159     sakharuk 2422:     return '';
                   2423: }
                   2424:  
                   2425: sub start_td_tex {
                   2426:     my ($parstack,$parser,$safeeval) = @_;
1.206     sakharuk 2427:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2428:     if ($alignchar eq '') {
                   2429: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2430:     }
1.206     sakharuk 2431:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2432:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2433:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2434:     if (defined $TeXwidth) {		
                   2435: 	my $current_length=&recalc($TeXwidth);
                   2436: 	$current_length=~/(\d+\.?\d*)/;
                   2437: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2438:     }
1.159     sakharuk 2439:     &Apache::lonxml::startredirection();
                   2440:     return '';
                   2441: }
                   2442: 
                   2443: sub end_td_tex {
                   2444:     my ($parstack,$parser,$safeeval) = @_;
1.304     foxr     2445:     my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
                   2446:     my $current_column = $Apache::londefdef::table[-1]{'counter_columns'}; 
1.303     foxr     2447:     my $data = &Apache::lonxml::endredirection();
                   2448: 
1.305     foxr     2449:     #  The rowspan array of the table indicates which cells are part of a span.
                   2450:     #  n indicates the start of a span set of n rows.
                   2451:     #  ^ indicates a cell that continues a span set.
1.306     foxr     2452:     #  _ indicates the cell is at the bottom of a span set.
1.305     foxr     2453:     #  If this and subsequent cells are part of a rowspan, we must
                   2454:     #  push along the row until we find one that is not.
                   2455: 
                   2456:     while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column]) 
1.306     foxr     2457: 	   && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
1.305     foxr     2458: 	# Part of a span.
                   2459: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
                   2460: 	$current_column++;
                   2461:     }
                   2462:     $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
                   2463:    
                   2464: 
1.320     foxr     2465:     # Get the column and row spans.
                   2466:     # Colspan can be done via \multicolumn if I can figure out the data structs.
                   2467: 
                   2468:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
                   2469:     if (!$colspan) {
                   2470: 	$colspan = 1;
                   2471:     }
1.305     foxr     2472: 
                   2473:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
                   2474:     if (!$rowspan) {
                   2475: 	$rowspan = 1;
                   2476:     }
                   2477: 
1.303     foxr     2478: 
1.305     foxr     2479: 
1.320     foxr     2480:     for (my $c = 0; $c < $colspan; $c++) {
                   2481: 	$Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
                   2482: 	for (my $i = 1; $i < $rowspan; $i++) {
                   2483: 	    $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
                   2484: 	    if ($i == ($rowspan-1)) {
                   2485: 		$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
                   2486: 	    }
1.306     foxr     2487: 	}
1.305     foxr     2488:     }
1.304     foxr     2489: 
1.159     sakharuk 2490:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2491:     if (defined $TeXwidth) {		
1.206     sakharuk 2492: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2493: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2494: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.159     sakharuk 2495:     } else {
1.206     sakharuk 2496: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2497: 	    my $garbage_data=$data;
                   2498: 	    my $fwidth=0;
                   2499:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2500: 		my $current_length=&recalc($1);
                   2501: 		$current_length=~/(\d+\.?\d*)/;
                   2502: 		if ($fwidth<$1) {$fwidth=$1;}
                   2503: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2504: 	    }
                   2505:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2506: 		my $current_length=$1;
                   2507: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2508: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2509: 	    }
                   2510: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2511: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2512: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2513: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
1.231     sakharuk 2514: 	} elsif ($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)*/) {
                   2515: 	    my $garbage_data=$data;
                   2516: 	    my $fwidth=0;
                   2517:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2518: 		my $current_length=&recalc($1);
                   2519: 		$current_length=~/(\d+\.?\d*)/;
                   2520: 		if ($fwidth<$1) {$fwidth=$1;}
                   2521: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2522: 	    }
                   2523:             while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2524: 		my $current_length=&recalc($1);
                   2525: 		$current_length=~/(\d+\.?\d*)/;
                   2526: 		if ($fwidth<$1) {$fwidth=$1;}
                   2527: 		$garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2528: 	    }
                   2529: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2530: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2531: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2532: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2533: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2534: 	} else {  
1.166     sakharuk 2535: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2536: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2537: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2538: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2539: 	    if ($data=~/\\vskip/) {
                   2540:                 my $newdata=$data;
                   2541: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2542: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2543: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2544: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2545: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2546:                     my @words=split(/ /,$elementdata);
                   2547: 		    foreach my $word (@words) {
                   2548: 			my $lengthword=2.5*&LATEX_length($word);
                   2549: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2550: 		    }
1.166     sakharuk 2551: 		}
                   2552: 	    } else {
1.206     sakharuk 2553: 		$current_length=2.5*&LATEX_length($data);
                   2554:                     my @words=split(/ /,$data);
                   2555: 		    foreach my $word (@words) {
1.228     sakharuk 2556: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2557: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2558: 		    }
1.166     sakharuk 2559: 	    }
1.206     sakharuk 2560: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2561: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2562: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2563: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
1.159     sakharuk 2564: 	}        
                   2565:     }
1.302     foxr     2566:     # Substitute all of the tables nested in this cell in their appropriate places.
                   2567: 
                   2568: 
                   2569:     my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
                   2570:     for (my $in=0; $in<=$nested_count; $in++) {    
1.301     foxr     2571: 	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
                   2572: 	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
                   2573: 	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2574: 	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
                   2575: 
                   2576:     }
                   2577:     # Should be be killing off the 'include' elements as they're used up?
1.305     foxr     2578: 
1.206     sakharuk 2579:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.305     foxr     2580: 
1.304     foxr     2581: 
                   2582: 
                   2583: 
                   2584:     #  the colspan array will indicate how many columns will be spanned by this
                   2585:     #  cell..this requires that counter_columns also be adjusted accordingly
                   2586:     #  so that the next bunch of text goes in the right cell.  Note that since
                   2587:     #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
                   2588:     #
                   2589: 
                   2590:     $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
                   2591:     for (my $i = 0; $i < ($colspan -1); $i++) {
                   2592: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
                   2593:     }
1.320     foxr     2594:     for (my $r = 0; $r < $rowspan; $r++) {
                   2595: 	$Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
                   2596: 	# Put empty text in spanned cols.
                   2597: 	
                   2598:     }
                   2599: 
1.304     foxr     2600: 
                   2601: 
1.301     foxr     2602:     return '';
1.159     sakharuk 2603: }
                   2604: 
1.122     albertel 2605: sub end_td {
1.126     sakharuk 2606:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2607:     my $currentstring = '';
                   2608:     if ($target eq 'web') {
                   2609: 	$currentstring = $token->[2];     
                   2610:     } elsif ($target eq 'tex') {
1.160     sakharuk 2611:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2612: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2613:     }
                   2614:     return $currentstring;
                   2615: }
                   2616: 
1.166     sakharuk 2617: #-- <th> tag (end tag optional)
1.122     albertel 2618: sub start_th {
                   2619:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2620:     my $currentstring = '';
                   2621:     if ($target eq 'web') {
                   2622: 	$currentstring = $token->[4];     
                   2623:     } elsif ($target eq 'tex') {
1.230     sakharuk 2624: 	$Apache::londefdef::TD_redirection = 1;
                   2625: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2626:     } 
                   2627:     return $currentstring;
1.130     sakharuk 2628: }   
1.230     sakharuk 2629:     
                   2630: sub tagg_check {
                   2631:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2632:     my @ar=@$parstack; 
                   2633:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2634: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2635: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2636: 	    last;
                   2637: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2638: 	    splice @ar, $i+1;
                   2639: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   2640: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2641: 	    last;
                   2642: 	}
                   2643:     }
                   2644:     return '';
                   2645: }
                   2646:  
                   2647: sub start_th_tex {
                   2648:     my ($parstack,$parser,$safeeval) = @_;
                   2649:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2650:     if ($alignchar eq '') {
                   2651: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   2652:     }
                   2653:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   2654:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   2655:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2656:     if (defined $TeXwidth) {		
                   2657: 	my $current_length=&recalc($TeXwidth);
                   2658: 	$current_length=~/(\d+\.?\d*)/;
                   2659: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2660:     }
                   2661:     &Apache::lonxml::startredirection();
                   2662:     return '';
                   2663: }
                   2664: 
                   2665: sub end_th_tex {
                   2666:     my ($parstack,$parser,$safeeval) = @_;
                   2667:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   2668:     my $data=&Apache::lonxml::endredirection();
                   2669:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2670:     if (defined $TeXwidth) {		
                   2671: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2672: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2673: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2674:     } else {
                   2675: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2676: 	    my $garbage_data=$data;
                   2677: 	    my $fwidth=0;
                   2678:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2679: 		my $current_length=&recalc($1);
                   2680: 		$current_length=~/(\d+\.?\d*)/;
                   2681: 		if ($fwidth<$1) {$fwidth=$1;}
                   2682: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2683: 	    }
                   2684:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2685: 		my $current_length=$1;
                   2686: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2687: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2688: 	    }
                   2689: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2690: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2691: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2692: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2693: 	} else {  
                   2694: 	    $data=~s/^\s+(\S.*)/$1/; 
                   2695: 	    $data=~s/(.*\S)\s+$/$1/;
                   2696: 	    $data=~s/(\s)+/$1/;
                   2697: 	    my ($current_length,$min_length)=(0,0);
                   2698: 	    if ($data=~/\\vskip/) {
                   2699:                 my $newdata=$data;
                   2700: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2701: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2702: 		foreach my $elementdata (@newdata) {
                   2703: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   2704: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   2705:                     my @words=split(/ /,$elementdata);
                   2706: 		    foreach my $word (@words) {
                   2707: 			my $lengthword=2.5*&LATEX_length($word);
                   2708: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2709: 		    }
                   2710: 		}
                   2711: 	    } else {
                   2712: 		$current_length=2.5*&LATEX_length($data);
                   2713:                     my @words=split(/ /,$data);
                   2714: 		    foreach my $word (@words) {
                   2715: 			my $lengthword=2*&LATEX_length($word);
                   2716: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2717: 		    }
                   2718: 	    }
                   2719: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2720: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2721: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2722: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2723: 	}        
                   2724:     }
                   2725: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   2726: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2727: 	}
                   2728:     #make data bold
                   2729:     $data='\textbf{'.$data.'}';
                   2730:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
                   2731:     return'';
                   2732: }
                   2733: 
1.122     albertel 2734: sub end_th {
1.130     sakharuk 2735:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2736:     my $currentstring = &end_p();	# Close any open <p> in the row.
1.122     albertel 2737:     if ($target eq 'web') {
1.277     foxr     2738: 	$currentstring .= $token->[2];     
1.122     albertel 2739:     } elsif ($target eq 'tex') {
1.230     sakharuk 2740:         $Apache::londefdef::TD_redirection =0;
                   2741: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 2742:     }
                   2743:     return $currentstring;
                   2744: }
1.230     sakharuk 2745:      
1.181     sakharuk 2746: #-- <img> tag (end tag forbidden)
1.249     foxr     2747: #
                   2748: #  Render the <IMG> tag.
                   2749: #     <IMG> has the following attributes (in addition to the 
                   2750: #     standard HTML ones:
                   2751: #      TeXwrap   - Governs how the tex target will try to wrap text around
                   2752: #                  horizontally aligned images.
                   2753: #      TeXwidth  - The width of the image when rendered for print (mm).
                   2754: #      TeXheight - The height of the image when rendered for print (mm)
                   2755: #         (Note there seems to also be support for this as a % of page size)
                   2756: #      
1.122     albertel 2757: sub start_img {
1.299     albertel 2758:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel 2759:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   2760: 					 undef,1);
1.189     albertel 2761:     if (not $src and ($target eq 'web' or $target eq 'tex')) { 
1.299     albertel 2762: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
1.189     albertel 2763: 	return '';
                   2764:     }
1.290     albertel 2765:     &Apache::lonxml::extlink($src);
1.122     albertel 2766:     my $currentstring = '';
                   2767:     my $scaling = .3;
1.249     foxr     2768: 
                   2769:    # Render unto browsers that which are the browser's...
                   2770: 
1.122     albertel 2771:     if ($target eq 'web') {
1.267     albertel 2772: 	if ($env{'browser.imagesuppress'} ne 'on') {
1.250     albertel 2773: 	    $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 2774: 	} else {
                   2775: 	    my $alttag= &Apache::lonxml::get_param
                   2776: 		('alt',$parstack,$safeeval,undef,1);
                   2777: 	    unless ($alttag) {
                   2778: 		$alttag=&Apache::lonmeta::alttag
                   2779: 		    ($Apache::lonxml::pwd[-1],$src);
1.51      sakharuk 2780: 	    }
1.158     sakharuk 2781: 	    $currentstring.='[IMAGE: '.$alttag.']';
1.1       sakharuk 2782: 	}
1.249     foxr     2783: 
                   2784: 	# and render unto TeX that which is LaTeX
                   2785: 
1.122     albertel 2786:     } elsif ($target eq 'tex') {
1.248     foxr     2787: 	#
                   2788: 	#  The alignment will require some superstructure to be put around
                   2789: 	#  the \includegraphics stuff.  At present we can only partially
                   2790: 	#  simulate the alignments offered by html.
                   2791: 	#
                   2792: 	#
                   2793: 	my $align = lc(&Apache::lonxml::get_param('align', 
                   2794: 						  $parstack,
                   2795: 						  $safeeval,
                   2796: 						  undef,1));
                   2797: 	if(!$align) {
1.287     foxr     2798: 		$align = "bottom";	# This is html's default so it's ours too.
1.248     foxr     2799: 	}
                   2800: 	#
                   2801: 	&Apache::lonxml::debug("Alignemnt = $align");
                   2802: 	#  LaTeX's image/text wrapping is really bad since it wants to
                   2803: 	#  make figures float.  
                   2804:         #   The user has the optional parameter (applicable only to l/r
                   2805: 	# alignment to use the picins/parpic directive to get wrapped text
                   2806: 	# this is also imperfect.. that's why we give them a choice...
                   2807: 	# so they can't yell at us for our choice.
                   2808: 	#
                   2809: 	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
                   2810: 							    $parstack,
                   2811: 							    $safeeval,
                   2812: 							    undef,0);
1.312     foxr     2813: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
1.248     foxr     2814: 	if(!$latex_rendering) {
1.312     foxr     2815: 		$latex_rendering = "texwrap";
                   2816: 	}
                   2817: 	# using texwrap inside a table does not work. So, if after all of this,
                   2818: 	# texwrap is on, we turn it off if we detect we're in a table:
                   2819: 	#
                   2820: 	if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
                   2821: 	    $latex_rendering = 'parpic';
1.248     foxr     2822: 	}
1.312     foxr     2823: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
1.248     foxr     2824: 
1.256     albertel 2825: 	#if original gif/jpg/png file exist do following:
1.266     albertel 2826: 	my $origsrc=$src;
1.256     albertel 2827: 	my ($path,$file) = &get_eps_image($src);
1.122     albertel 2828: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.261     foxr     2829: 	&Apache::lonxml::debug("path = $path file = $file src = $src");
1.192     sakharuk 2830: 	if (-e $src) {
1.261     foxr     2831: 	    &Apache::lonxml::debug("$src exists");
1.256     albertel 2832: 	    my ($height_param,$width_param)=
1.266     albertel 2833: 		&image_size($origsrc,0.3,$parstack,$safeeval);
1.262     foxr     2834: 	    my $destpath = $path;
1.263     foxr     2835: 	    $destpath    =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
                   2836: 	    my $destfile = $file;
                   2837: 	    $destfile    =~ s/ /\_/g;
1.266     albertel 2838: 	    my $size;
                   2839: 	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
                   2840: 	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
                   2841: 	    $size='['.$size;
                   2842: 	    $size=~s/,$/]/; 
1.262     foxr     2843: 	    $currentstring .= '\graphicspath{{'.$destpath.'}}'
1.266     albertel 2844: 		.'\includegraphics'.$size.'{'.$destfile.'} ';
1.256     albertel 2845: 
1.248     foxr     2846: 	    #    If there's an alignment specification we need to honor it here.
                   2847: 	    #    For the horizontal alignments, we will also honor the
                   2848: 	    #    value of the latex specfication.  The default is parbox,
                   2849: 	    #    and that's used for illegal values too.  
                   2850: 	    #    
                   2851: 	    #    Even though we set a default alignment value, the user
                   2852: 	    #    could have given us an illegal value.  In that case we
                   2853: 	    #    just use the default alignment of bottom..
                   2854: 	    if      ($align eq "top")    {
                   2855: 		$currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
                   2856: 	    } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
                   2857: 		my $offset = $height_param/2;
                   2858: 		$currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
                   2859: 	    } elsif ($align eq "left")   { 
                   2860: 		if ($latex_rendering eq "parpic") { 
                   2861: 		    $currentstring = '\parpic[l]{'.$currentstring.'}';
1.286     foxr     2862: 		} else {    	                                 # wrapfig render
                   2863: 		    $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
                   2864: 			.'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
1.248     foxr     2865: 		}
                   2866: 	    } elsif ($align eq "right")  {   
                   2867: 		if ($latex_rendering eq "parpic") {
                   2868: 		    $currentstring = '\parpic[r]{'.$currentstring.'}';
1.286     foxr     2869: 		} else {	                                 # wrapfig rendering
                   2870: 		    $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
                   2871: 			.'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
                   2872: 
1.248     foxr     2873: 		}
                   2874: 	    } else {		# Bottom is also default.
                   2875: 		# $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
                   2876: 	    }
1.122     albertel 2877: 	} else {
1.261     foxr     2878: 	    &Apache::lonxml::debug("$src does not exist");
1.122     albertel 2879: 	    #original image file doesn't exist so check the alt attribute
                   2880: 	    my $alt = 
                   2881: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   2882: 	    unless ($alt) {
                   2883: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   2884: 	    }
                   2885: 
1.256     albertel 2886: 	    if ($alt) { $currentstring .= ' '.$alt.' '; }
1.59      sakharuk 2887: 	}
1.249     foxr     2888: 
                   2889: 	# And here's where the semi-quote breaks down: allow the user
                   2890:         # to edit the beast as well by rendering the problem for edit:
1.186     albertel 2891:     } elsif ($target eq 'edit') {
                   2892: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   2893: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
                   2894: 	    &Apache::edit::browse('src',undef,'alt').' '.
                   2895: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   2896: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   2897: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   2898: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   2899: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   2900: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 2901: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   2902: 						   ['','bottom','middle','top','left','right'],$token,5);
1.249     foxr     2903: 	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
                   2904: 						   ['', 'parbox', 'parpic'], $token, 2);
1.186     albertel 2905: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.249     foxr     2906: 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
                   2907: 	my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   2908: 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
                   2909: 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
                   2910: 
                   2911: 
1.186     albertel 2912: 	$currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   2913: 	if ($width) { $currentstring.=' width="'.$width.'" '; }
                   2914: 	if ($height) { $currentstring.=' height="'.$height.'" '; }
                   2915: 	$currentstring .= ' />';
                   2916:     } elsif ($target eq 'modified') {
1.210     albertel 2917: 	my ($osrc,$owidth,$oheight)=
                   2918: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2919: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 2920: 					     $safeeval,'src','alt','align',
1.249     foxr     2921: 					     'TeXwidth','TeXheight', 'TeXwrap',
1.210     albertel 2922: 					     'width','height');
                   2923: 	my ($nsrc,$nwidth,$nheight)=
                   2924: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   2925: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   2926: 	&image_replication($loc);
                   2927: 	my ($iwidth,$iheight);
                   2928: 	if (-e $loc) {
                   2929: 	    my $image = Image::Magick->new;
                   2930: 	    $image->Read($loc);
                   2931: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   2932: 				   $image->Get('height'));
                   2933: 	}
                   2934: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   2935: 	    # changed image or no size specified,
                   2936:             # if they didn't explicitly change the 
                   2937:             # width or height use the ones from the image
                   2938: 	    if ($iwidth && $iheight) {
                   2939: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   2940: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   2941: 		}
                   2942: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   2943: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 2944: 		}
                   2945: 	    }
                   2946: 	}
1.210     albertel 2947: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   2948: 	# if we don't have a width or height
                   2949: 	if ($iwidth && $cwidth && !$cheight) {
                   2950: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   2951: 	}
                   2952: 	if ($iheight && $cheight && !$cwidth) {
                   2953: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   2954: 	}
                   2955: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 2956:     }
1.261     foxr     2957: 
1.122     albertel 2958:     return $currentstring;
                   2959: }
                   2960: 
                   2961: sub end_img {
                   2962:     my ($target,$token) = @_;
                   2963:     my $currentstring = '';
                   2964:     if ($target eq 'web') {
                   2965: 	$currentstring = $token->[2];
                   2966:     } elsif ($target eq 'tex') {
                   2967: 	$currentstring = '';
                   2968:     }
                   2969:     return $currentstring;
                   2970: }
                   2971: 
1.181     sakharuk 2972: #-- <applet> tag (end tag required)
1.122     albertel 2973: sub start_applet {
                   2974:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2975:     
                   2976:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
1.290     albertel 2977:     &Apache::lonxml::extlink($code);
1.122     albertel 2978:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   2979: 					   undef,1);
1.290     albertel 2980:     &Apache::lonxml::extlink($archive);
1.122     albertel 2981:     my $currentstring = '';
                   2982:     if ($target eq 'web') {
1.267     albertel 2983: 	if ($env{'browser.appletsuppress'} ne 'on') {
1.250     albertel 2984: 	    $currentstring = &Apache::lonenc::encrypt_ref($token,
                   2985: 							  {'code'=>$code,
                   2986: 							   'archive'=>$archive}
                   2987: 							  );
1.122     albertel 2988: 	} else {
                   2989: 	    my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   2990: 						   $safeeval,undef,1);
                   2991: 	    unless ($alttag) {
                   2992: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   2993: 						 $code);
1.44      sakharuk 2994: 	    }
1.122     albertel 2995: 	    $currentstring='[APPLET: '.$alttag.']';
1.1       sakharuk 2996: 	}
1.122     albertel 2997:     } elsif ($target eq 'tex') {
1.177     albertel 2998: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   2999: 					       $safeeval,undef,1);
                   3000: 	unless ($alttag) {
                   3001: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   3002: 						undef,1);
                   3003: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3004: 					     $code);
1.175     sakharuk 3005: 	}
1.177     albertel 3006: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   3007: 	    '.}\end{center}';
1.122     albertel 3008:     } 
                   3009:     return $currentstring;
                   3010: }
                   3011: 
                   3012: sub end_applet {
                   3013:     my ($target,$token) = @_;
                   3014:     my $currentstring = '';
                   3015:     if ($target eq 'web') {
                   3016: 	$currentstring = $token->[2];
                   3017:     } elsif ($target eq 'tex') {
                   3018:     } 
                   3019:     return $currentstring;
                   3020: }
                   3021: 
1.181     sakharuk 3022: #-- <embed> tag (end tag optional/required)
1.122     albertel 3023: sub start_embed {    
                   3024:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3025:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3026:     &Apache::lonxml::extlink($src);
1.122     albertel 3027:     my $currentstring = '';
                   3028:     if ($target eq 'web') {
1.267     albertel 3029: 	if ($env{'browser.embedsuppress'} ne 'on') {
1.250     albertel 3030: 	    $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 3031: 	} else {
                   3032: 	    my $alttag=&Apache::lonxml::get_param
                   3033: 		('alt',$parstack,$safeeval,undef,1);
                   3034: 	    unless ($alttag) {
                   3035: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
1.42      albertel 3036: 	    }
1.122     albertel 3037: 	    $currentstring='[EMBED: '.$alttag.']';
1.10      www      3038: 	}
1.122     albertel 3039:     } elsif ($target eq 'tex') {
                   3040:     } 
                   3041:     return $currentstring;
                   3042: }
                   3043: 
                   3044: sub end_embed {
                   3045:     my ($target,$token) = @_;
                   3046:     my $currentstring = '';
                   3047:     if ($target eq 'web') {
                   3048: 	$currentstring = $token->[2];     
1.175     sakharuk 3049:     } elsif ($target eq 'tex') {  
1.122     albertel 3050:     } 
                   3051:     return $currentstring;
                   3052: }
                   3053: 
1.181     sakharuk 3054: #-- <param> tag (end tag forbidden)
1.122     albertel 3055: sub start_param {
                   3056:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.290     albertel 3057:     if (&Apache::lonxml::get_param('name',$parstack,
                   3058: 				   $safeeval,undef,1)=~/^cabbase$/i) {
                   3059: 	my $value=&Apache::lonxml::get_param('value',$parstack,
                   3060: 					     $safeeval,undef,1);
                   3061: 	&Apache::lonxml::extlink($value);
                   3062:     } 
                   3063:   
                   3064:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3065:     &Apache::lonxml::extlink($src);
1.122     albertel 3066:     my $currentstring = '';
                   3067:     if ($target eq 'web') {
1.250     albertel 3068: 	my %toconvert;
                   3069: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3070: 	if ($src) { $toconvert{'src'}= $src; }
                   3071: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
                   3072: 					    undef,1);
1.251     albertel 3073: 	if ($name=~/^cabbase$/i) {
                   3074: 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
                   3075: 							   $safeeval,undef,1);
                   3076: 	}
1.250     albertel 3077: 	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
1.122     albertel 3078:     } elsif ($target eq 'tex') {
                   3079:     } 
                   3080:     return $currentstring;
                   3081: }
                   3082: 
                   3083: sub end_param {
                   3084:     my ($target,$token) = @_;
                   3085:     my $currentstring = '';
                   3086:     if ($target eq 'web') {
                   3087: 	$currentstring = $token->[2];     
                   3088:     } elsif ($target eq 'tex') {
                   3089:     } 
                   3090:     return $currentstring;
                   3091: }
                   3092: 
                   3093: #-- <allow> tag
                   3094: sub start_allow {
                   3095:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3096:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3097:     &Apache::lonxml::extlink($src);
                   3098: 
1.241     albertel 3099:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 3100:     my $result;
                   3101:     if ($target eq 'edit') {
                   3102: 	$result .=&Apache::edit::tag_start($target,$token);
                   3103: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   3104: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   3105:     } elsif ($target eq 'modified') {
                   3106: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   3107: 						     $safeeval,'src');
                   3108: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   3109:     }
                   3110:     return $result;
                   3111: }
                   3112: 
                   3113: sub end_allow {
                   3114:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3115:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   3116:     return '';
                   3117: }
1.119     www      3118: 
1.181     sakharuk 3119: #-- Frames (end tag required)
                   3120: #-- <frameset>
1.122     albertel 3121: sub start_frameset {
                   3122:     my ($target,$token) = @_;
1.277     foxr     3123:     my $currentstring = '';	# Close any pending para.
1.122     albertel 3124:     if ($target eq 'web') { 
1.180     albertel 3125: 	if (!$Apache::lonxml::registered &&
1.267     albertel 3126: 	    $env{'request.state'} eq 'published') {
1.122     albertel 3127: 	    $currentstring.='<head>'.
                   3128: 		&Apache::lonmenu::registerurl(undef,$target).'</head>';
1.10      www      3129: 	}
1.133     www      3130: 	my $onLoad='';
                   3131: 	foreach my $key (keys(%{$token->[2]})) {
                   3132: 	    if ($key =~ /^onload$/i) {
                   3133: 		$onLoad.=$token->[2]->{$key}.';';
                   3134: 		delete($token->[2]->{$key});
                   3135: 	    }
                   3136: 	}
                   3137: 	$token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
                   3138: 	my $onUnload='';
                   3139: 	foreach my $key (keys(%{$token->[2]})) {
                   3140: 	    if ($key =~ /^onunload$/i) {
                   3141: 		$onUnload.=$token->[2]->{$key}.';';
                   3142: 		delete($token->[2]->{$key});
                   3143: 	    }
                   3144: 	}
                   3145: 	$token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
                   3146: 	    ';'.$onUnload;
                   3147: 	
                   3148: 	$currentstring .= '<'.$token->[1];
                   3149: 	foreach (keys %{$token->[2]}) {
                   3150: 	    $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
                   3151: 	}
                   3152: 	$currentstring.='>';
1.122     albertel 3153:     }
                   3154:     return $currentstring;
                   3155: }
                   3156: 
                   3157: sub end_frameset {
                   3158:     my ($target,$token) = @_;
                   3159:     my $currentstring = '';
                   3160:     if ($target eq 'web') {
                   3161: 	$currentstring = $token->[2];
                   3162:     }
                   3163:     return $currentstring;
                   3164: }
1.162     sakharuk 3165: 
1.181     sakharuk 3166: #-- <xmp> (end tag required)
1.162     sakharuk 3167: sub start_xmp {
                   3168:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3169:     my $currentstring = '';
                   3170:     if ($target eq 'web') {
                   3171: 	$currentstring .= $token->[4];
                   3172:     } elsif ($target eq 'tex') {
                   3173: 	$currentstring .= '\begin{verbatim}';
                   3174:     } 
                   3175:     return $currentstring;
                   3176: }
                   3177: 
                   3178: sub end_xmp {
                   3179:     my ($target,$token) = @_;
                   3180:     my $currentstring = '';
                   3181:     if ($target eq 'web') {
                   3182: 	$currentstring .= $token->[2];
                   3183:     } elsif ($target eq 'tex') {
                   3184: 	$currentstring .= '\end{verbatim}';
                   3185:     }
                   3186:     return $currentstring;
                   3187: }
                   3188: 
1.181     sakharuk 3189: #-- <pre> (end tag required)
1.122     albertel 3190: sub start_pre {
1.126     sakharuk 3191:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3192:     my $currentstring = &end_p();	# close off pending <p>
1.122     albertel 3193:     if ($target eq 'web') {
                   3194: 	$currentstring .= $token->[4];
                   3195:     } elsif ($target eq 'tex') {
1.136     sakharuk 3196: 	$currentstring .= '\begin{verbatim}';
1.319     albertel 3197: 	&Apache::lonxml::disable_LaTeX_substitutions();
1.122     albertel 3198:     } 
                   3199:     return $currentstring;
                   3200: }
                   3201: 
                   3202: sub end_pre {
                   3203:     my ($target,$token) = @_;
                   3204:     my $currentstring = '';
                   3205:     if ($target eq 'web') {
                   3206: 	$currentstring .= $token->[2];
                   3207:     } elsif ($target eq 'tex') {
1.136     sakharuk 3208: 	$currentstring .= '\end{verbatim}';
1.319     albertel 3209: 	&Apache::lonxml::enable_LaTeX_substitutions();
1.122     albertel 3210:     }
                   3211:     return $currentstring;
                   3212: }
                   3213: 
                   3214: #-- <insert>
                   3215: sub start_insert {
                   3216:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3217:     my $currentstring = '';
                   3218:     if ($target eq 'web') {
                   3219: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3220: 	$currentstring .= '<b>'.$display.'</b>';;
                   3221:     }
                   3222:     return $currentstring;
                   3223: }
                   3224: 
                   3225: sub end_insert {
                   3226:     my ($target,$token) = @_;
                   3227:     my $currentstring = '';
                   3228:     if ($target eq 'web') {
                   3229: 	$currentstring .= '';
                   3230:     }
                   3231:     return $currentstring;
                   3232: }
                   3233: 
                   3234: #-- <externallink>
                   3235: sub start_externallink {
                   3236:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3237:     my $currentstring = '';
                   3238:     if ($target eq 'web') {
                   3239: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3240: 	$currentstring .= '<b>'.$display.'</b>';;
                   3241:     }
                   3242:     return $currentstring;
                   3243: }
                   3244: 
                   3245: sub end_externallink {
                   3246:     my ($target,$token) = @_;
                   3247:     my $currentstring = '';
                   3248:     if ($target eq 'web') {
                   3249: 	$currentstring .= '';
                   3250:     }
                   3251:     return $currentstring;
                   3252: }
                   3253: 
                   3254: #-- <blankspace heigth="">
                   3255: sub start_blankspace {
                   3256:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3257:     my $currentstring = &end_p();	# closes off any unclosed <p>
1.122     albertel 3258:     if ($target eq 'tex') {
                   3259: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   3260: 	$currentstring .= '\vskip '.$howmuch.' ';
                   3261:     }
                   3262:     return $currentstring;
                   3263: }
                   3264: 
                   3265: sub end_blankspace {
                   3266:     my ($target,$token) = @_;
                   3267:     my $currentstring = '';
                   3268:     if ($target eq 'tex') {
                   3269: 	$currentstring .= '';
                   3270:     }
                   3271:     return $currentstring;
                   3272: }
                   3273: 
1.181     sakharuk 3274: #-- <abbr> tag (end tag required)
1.122     albertel 3275: sub start_abbr {
                   3276:     my ($target,$token) = @_;
                   3277:     my $currentstring = '';
                   3278:     if ($target eq 'web') {
                   3279: 	$currentstring = $token->[4];     
                   3280:     } 
                   3281:     return $currentstring;
                   3282: }
                   3283: 
                   3284: sub end_abbr {
                   3285:     my ($target,$token) = @_;
                   3286:     my $currentstring = '';
                   3287:     if ($target eq 'web') {
                   3288: 	$currentstring = $token->[2];    
                   3289:     } 
                   3290:     return $currentstring;
                   3291: }
                   3292: 
1.181     sakharuk 3293: #-- <acronym> tag (end tag required)
1.122     albertel 3294: sub start_acronym {
                   3295:     my ($target,$token) = @_;
                   3296:     my $currentstring = '';
                   3297:     if ($target eq 'web') {
                   3298: 	$currentstring = $token->[4];     
                   3299:     } 
                   3300:     return $currentstring;
                   3301: }
                   3302: 
                   3303: sub end_acronym {
                   3304:     my ($target,$token) = @_;
                   3305:     my $currentstring = '';
                   3306:     if ($target eq 'web') {
                   3307: 	$currentstring = $token->[2];    
                   3308:     } 
                   3309:     return $currentstring;
                   3310: }
                   3311: 
1.181     sakharuk 3312: #-- <area> tag (end tag forbidden)
1.122     albertel 3313: sub start_area {
                   3314:     my ($target,$token) = @_;
                   3315:     my $currentstring = '';
                   3316:     if ($target eq 'web') {
                   3317: 	$currentstring = $token->[4];     
                   3318:     } 
                   3319:     return $currentstring;
                   3320: }
                   3321: 
                   3322: sub end_area {
                   3323:     my ($target,$token) = @_;
                   3324:     my $currentstring = '';
                   3325:     if ($target eq 'web') {
                   3326: 	$currentstring = $token->[2];    
                   3327:     } 
                   3328:     return $currentstring;
                   3329: }
                   3330: 
1.181     sakharuk 3331: #-- <base> tag (end tag forbidden)
1.122     albertel 3332: sub start_base {
                   3333:     my ($target,$token) = @_;
                   3334:     my $currentstring = '';
                   3335:     if ($target eq 'web') {
                   3336: 	$currentstring = $token->[4];     
1.161     sakharuk 3337:     }
1.122     albertel 3338:     return $currentstring;
                   3339: }
                   3340: 
                   3341: sub end_base {
                   3342:     my ($target,$token) = @_;
                   3343:     my $currentstring = '';
                   3344:     if ($target eq 'web') {
                   3345: 	$currentstring = $token->[2];    
                   3346:     } 
                   3347:     return $currentstring;
                   3348: }
                   3349: 
1.181     sakharuk 3350: #-- <bdo> tag (end tag required)
1.122     albertel 3351: sub start_bdo {
                   3352:     my ($target,$token) = @_;
                   3353:     my $currentstring = '';
                   3354:     if ($target eq 'web') {
                   3355: 	$currentstring = $token->[4];     
                   3356:     } 
                   3357:     return $currentstring;
                   3358: }
                   3359: 
                   3360: sub end_bdo {
                   3361:     my ($target,$token) = @_;
                   3362:     my $currentstring = '';
                   3363:     if ($target eq 'web') {
                   3364: 	$currentstring = $token->[2];    
                   3365:     } 
                   3366:     return $currentstring;
                   3367: }
                   3368: 
1.181     sakharuk 3369: #-- <bgsound> tag (end tag optional)
1.122     albertel 3370: sub start_bgsound {
                   3371:     my ($target,$token) = @_;
                   3372:     my $currentstring = '';
                   3373:     if ($target eq 'web') {
                   3374: 	$currentstring = $token->[4];     
                   3375:     } 
                   3376:     return $currentstring;
                   3377: }
                   3378: 
                   3379: sub end_bgsound {
                   3380:     my ($target,$token) = @_;
                   3381:     my $currentstring = '';
                   3382:     if ($target eq 'web') {
                   3383: 	$currentstring = $token->[2];    
                   3384:     } 
                   3385:     return $currentstring;
                   3386: }
                   3387: 
1.181     sakharuk 3388: #-- <blink> tag (end tag required)
1.122     albertel 3389: sub start_blink {
                   3390:     my ($target,$token) = @_;
                   3391:     my $currentstring = '';
                   3392:     if ($target eq 'web') {
                   3393: 	$currentstring = $token->[4];     
                   3394:     } 
                   3395:     return $currentstring;
                   3396: }
                   3397: 
                   3398: sub end_blink {
                   3399:     my ($target,$token) = @_;
                   3400:     my $currentstring = '';
                   3401:     if ($target eq 'web') {
                   3402: 	$currentstring = $token->[2];    
                   3403:     } 
                   3404:     return $currentstring;
                   3405: }
                   3406: 
1.181     sakharuk 3407: #-- <blockquote> tag (end tag required)
1.122     albertel 3408: sub start_blockquote {
                   3409:     my ($target,$token) = @_;
1.279     foxr     3410:     my $currentstring = &end_p();	# Close any unclosed <p>
1.122     albertel 3411:     if ($target eq 'web') {
1.277     foxr     3412: 	$currentstring .= $token->[4];     
1.122     albertel 3413:     } 
                   3414:     return $currentstring;
                   3415: }
                   3416: 
                   3417: sub end_blockquote {
                   3418:     my ($target,$token) = @_;
                   3419:     my $currentstring = '';
                   3420:     if ($target eq 'web') {
                   3421: 	$currentstring = $token->[2];    
                   3422:     } 
                   3423:     return $currentstring;
                   3424: }
                   3425: 
1.181     sakharuk 3426: #-- <button> tag (end tag required)
1.122     albertel 3427: sub start_button {
                   3428:     my ($target,$token) = @_;
                   3429:     my $currentstring = '';
                   3430:     if ($target eq 'web') {
                   3431: 	$currentstring = $token->[4];     
                   3432:     } 
                   3433:     return $currentstring;
                   3434: }
                   3435: 
                   3436: sub end_button {
                   3437:     my ($target,$token) = @_;
                   3438:     my $currentstring = '';
                   3439:     if ($target eq 'web') {
                   3440: 	$currentstring = $token->[2];    
                   3441:     } 
                   3442:     return $currentstring;
                   3443: }
                   3444: 
1.181     sakharuk 3445: #-- <caption> tag (end tag required)
1.122     albertel 3446: sub start_caption {
                   3447:     my ($target,$token) = @_;
                   3448:     my $currentstring = '';
                   3449:     if ($target eq 'web') {
                   3450: 	$currentstring = $token->[4];     
                   3451:     } 
                   3452:     return $currentstring;
                   3453: }
                   3454: 
                   3455: sub end_caption {
                   3456:     my ($target,$token) = @_;
                   3457:     my $currentstring = '';
                   3458:     if ($target eq 'web') {
                   3459: 	$currentstring = $token->[2];    
                   3460:     } 
                   3461:     return $currentstring;
                   3462: }
                   3463: 
1.181     sakharuk 3464: #-- <col> tag (end tag forbdden)
1.122     albertel 3465: sub start_col {
                   3466:     my ($target,$token) = @_;
                   3467:     my $currentstring = '';
                   3468:     if ($target eq 'web') {
                   3469: 	$currentstring = $token->[4];     
                   3470:     } 
                   3471:     return $currentstring;
                   3472: }
                   3473: 
                   3474: sub end_col {
                   3475:     my ($target,$token) = @_;
                   3476:     my $currentstring = '';
                   3477:     if ($target eq 'web') {
                   3478: 	$currentstring = $token->[2];    
                   3479:     } 
                   3480:     return $currentstring;
                   3481: }
                   3482: 
1.181     sakharuk 3483: #-- <colgroup> tag (end tag optional)
1.122     albertel 3484: sub start_colgroup {
                   3485:     my ($target,$token) = @_;
                   3486:     my $currentstring = '';
                   3487:     if ($target eq 'web') {
                   3488: 	$currentstring = $token->[4];     
                   3489:     } 
                   3490:     return $currentstring;
                   3491: }
                   3492: 
                   3493: sub end_colgroup {
                   3494:     my ($target,$token) = @_;
                   3495:     my $currentstring = '';
                   3496:     if ($target eq 'web') {
                   3497: 	$currentstring = $token->[2];    
                   3498:     } 
                   3499:     return $currentstring;
                   3500: }
                   3501: 
1.181     sakharuk 3502: #-- <del> tag (end tag required)
1.122     albertel 3503: sub start_del {
                   3504:     my ($target,$token) = @_;
                   3505:     my $currentstring = '';
                   3506:     if ($target eq 'web') {
                   3507: 	$currentstring = $token->[4];     
                   3508:     } 
                   3509:     return $currentstring;
                   3510: }
                   3511: 
                   3512: sub end_del {
                   3513:     my ($target,$token) = @_;
                   3514:     my $currentstring = '';
                   3515:     if ($target eq 'web') {
                   3516: 	$currentstring = $token->[2];    
                   3517:     } 
                   3518:     return $currentstring;
                   3519: }
                   3520: 
1.181     sakharuk 3521: #-- <fieldset> tag (end tag required)
1.122     albertel 3522: sub start_fieldset {
                   3523:     my ($target,$token) = @_;
                   3524:     my $currentstring = '';
                   3525:     if ($target eq 'web') {
                   3526: 	$currentstring = $token->[4];     
                   3527:     } 
                   3528:     return $currentstring;
                   3529: }
                   3530: 
                   3531: sub end_fieldset {
                   3532:     my ($target,$token) = @_;
                   3533:     my $currentstring = '';
                   3534:     if ($target eq 'web') {
                   3535: 	$currentstring = $token->[2];    
                   3536:     } 
                   3537:     return $currentstring;
                   3538: }
                   3539: 
1.181     sakharuk 3540: #-- <frame> tag (end tag forbidden)
1.122     albertel 3541: sub start_frame {
                   3542:     my ($target,$token) = @_;
                   3543:     my $currentstring = '';
                   3544:     if ($target eq 'web') {
                   3545: 	$currentstring = $token->[4];     
                   3546:     } 
                   3547:     return $currentstring;
                   3548: }
                   3549: 
                   3550: sub end_frame {
                   3551:     my ($target,$token) = @_;
                   3552:     my $currentstring = '';
                   3553:     if ($target eq 'web') {
                   3554: 	$currentstring = $token->[2];    
                   3555:     } 
                   3556:     return $currentstring;
                   3557: }
                   3558: 
1.181     sakharuk 3559: #-- <iframe> tag (end tag required)
1.122     albertel 3560: sub start_iframe {
                   3561:     my ($target,$token) = @_;
                   3562:     my $currentstring = '';
                   3563:     if ($target eq 'web') {
                   3564: 	$currentstring = $token->[4];     
                   3565:     } 
                   3566:     return $currentstring;
                   3567: }
                   3568: 
                   3569: sub end_iframe {
                   3570:     my ($target,$token) = @_;
                   3571:     my $currentstring = '';
                   3572:     if ($target eq 'web') {
                   3573: 	$currentstring = $token->[2];    
                   3574:     } 
                   3575:     return $currentstring;
                   3576: }
                   3577: 
1.181     sakharuk 3578: #-- <ins> tag (end tag required)
1.122     albertel 3579: sub start_ins {
                   3580:     my ($target,$token) = @_;
                   3581:     my $currentstring = '';
                   3582:     if ($target eq 'web') {
                   3583: 	$currentstring = $token->[4];     
                   3584:     } 
                   3585:     return $currentstring;
                   3586: }
                   3587: 
                   3588: sub end_ins {
                   3589:     my ($target,$token) = @_;
                   3590:     my $currentstring = '';
                   3591:     if ($target eq 'web') {
                   3592: 	$currentstring = $token->[2];    
                   3593:     } 
                   3594:     return $currentstring;
                   3595: }
                   3596: 
1.181     sakharuk 3597: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3598: sub start_isindex {
                   3599:     my ($target,$token) = @_;
                   3600:     my $currentstring = '';
                   3601:     if ($target eq 'web') {
                   3602: 	$currentstring = $token->[4];     
                   3603:     } 
                   3604:     return $currentstring;
                   3605: }
                   3606: 
                   3607: sub end_isindex {
                   3608:     my ($target,$token) = @_;
                   3609:     my $currentstring = '';
                   3610:     if ($target eq 'web') {
                   3611: 	$currentstring = $token->[2];    
                   3612:     } 
                   3613:     return $currentstring;
                   3614: }
                   3615: 
1.181     sakharuk 3616: #-- <keygen> tag (end tag forbidden)
1.122     albertel 3617: sub start_keygen {
                   3618:     my ($target,$token) = @_;
                   3619:     my $currentstring = '';
                   3620:     if ($target eq 'web') {
                   3621: 	$currentstring = $token->[4];     
                   3622:     } 
                   3623:     return $currentstring;
                   3624: }
                   3625: 
                   3626: sub end_keygen {
                   3627:     my ($target,$token) = @_;
                   3628:     my $currentstring = '';
                   3629:     if ($target eq 'web') {
                   3630: 	$currentstring = $token->[2];    
                   3631:     } 
                   3632:     return $currentstring;
                   3633: }
                   3634: 
                   3635: #-- <label> tag
                   3636: sub start_label {
                   3637:     my ($target,$token) = @_;
                   3638:     my $currentstring = '';
                   3639:     if ($target eq 'web') {
                   3640: 	$currentstring = $token->[4];     
                   3641:     } 
                   3642:     return $currentstring;
                   3643: }
                   3644: 
                   3645: sub end_label {
                   3646:     my ($target,$token) = @_;
                   3647:     my $currentstring = '';
                   3648:     if ($target eq 'web') {
                   3649: 	$currentstring = $token->[2];    
                   3650:     } 
                   3651:     return $currentstring;
                   3652: }
                   3653: 
1.181     sakharuk 3654: #-- <layer> tag (end tag required)
1.122     albertel 3655: sub start_layer {
                   3656:     my ($target,$token) = @_;
                   3657:     my $currentstring = '';
                   3658:     if ($target eq 'web') {
                   3659: 	$currentstring = $token->[4];     
                   3660:     } 
                   3661:     return $currentstring;
                   3662: }
                   3663: 
                   3664: sub end_layer {
                   3665:     my ($target,$token) = @_;
                   3666:     my $currentstring = '';
                   3667:     if ($target eq 'web') {
                   3668: 	$currentstring = $token->[2];    
                   3669:     } 
                   3670:     return $currentstring;
                   3671: }
                   3672: 
1.181     sakharuk 3673: #-- <legend> tag (end tag required)
1.122     albertel 3674: sub start_legend {
                   3675:     my ($target,$token) = @_;
                   3676:     my $currentstring = '';
                   3677:     if ($target eq 'web') {
                   3678: 	$currentstring = $token->[4];     
                   3679:     } 
                   3680:     return $currentstring;
                   3681: }
                   3682: 
                   3683: sub end_legend {
                   3684:     my ($target,$token) = @_;
                   3685:     my $currentstring = '';
                   3686:     if ($target eq 'web') {
                   3687: 	$currentstring = $token->[2];    
                   3688:     } 
                   3689:     return $currentstring;
                   3690: }
                   3691: 
1.181     sakharuk 3692: #-- <link> tag (end tag forbidden)
1.122     albertel 3693: sub start_link {
1.292     albertel 3694:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 3695:     my $currentstring = '';
                   3696:     if ($target eq 'web') {
1.291     albertel 3697: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   3698: 					    undef,1);
                   3699: 	&Apache::lonxml::extlink($href);
1.122     albertel 3700: 	$currentstring = $token->[4];     
                   3701:     } 
                   3702:     return $currentstring;
                   3703: }
                   3704: 
                   3705: sub end_link {
                   3706:     my ($target,$token) = @_;
                   3707:     my $currentstring = '';
                   3708:     if ($target eq 'web') {
                   3709: 	$currentstring = $token->[2];    
                   3710:     } 
                   3711:     return $currentstring;
                   3712: }
                   3713: 
1.181     sakharuk 3714: #-- <marquee> tag (end tag optional)
1.122     albertel 3715: sub start_marquee {
                   3716:     my ($target,$token) = @_;
                   3717:     my $currentstring = '';
                   3718:     if ($target eq 'web') {
                   3719: 	$currentstring = $token->[4];     
                   3720:     } 
                   3721:     return $currentstring;
                   3722: }
                   3723: 
                   3724: sub end_marquee {
                   3725:     my ($target,$token) = @_;
                   3726:     my $currentstring = '';
                   3727:     if ($target eq 'web') {
                   3728: 	$currentstring = $token->[2];    
                   3729:     } 
                   3730:     return $currentstring;
                   3731: }
                   3732: 
1.179     sakharuk 3733: #-- <multicol> tag (end tag required)
                   3734: sub start_multicol {
1.122     albertel 3735:     my ($target,$token) = @_;
1.279     foxr     3736:     my $currentstring = &end_p();	# Close any pending <p>
1.122     albertel 3737:     if ($target eq 'web') {
1.277     foxr     3738: 	$currentstring .= $token->[4];     
1.122     albertel 3739:     } 
                   3740:     return $currentstring;
                   3741: }
                   3742: 
1.179     sakharuk 3743: sub end_multicol {
1.122     albertel 3744:     my ($target,$token) = @_;
                   3745:     my $currentstring = '';
                   3746:     if ($target eq 'web') {
                   3747: 	$currentstring = $token->[2];    
                   3748:     } 
                   3749:     return $currentstring;
                   3750: }
                   3751: 
1.179     sakharuk 3752: #-- <nobr> tag (end tag required)
1.122     albertel 3753: sub start_nobr {
                   3754:     my ($target,$token) = @_;
                   3755:     my $currentstring = '';
                   3756:     if ($target eq 'web') {
                   3757: 	$currentstring = $token->[4];     
1.179     sakharuk 3758:     }  elsif ($target eq 'tex') {
                   3759: 	$currentstring='\mbox{';
                   3760:     }
1.122     albertel 3761:     return $currentstring;
                   3762: }
                   3763: 
                   3764: sub end_nobr {
                   3765:     my ($target,$token) = @_;
                   3766:     my $currentstring = '';
                   3767:     if ($target eq 'web') {
                   3768: 	$currentstring = $token->[2];    
1.179     sakharuk 3769:     }   elsif ($target eq 'tex') {
                   3770: 	$currentstring='}';
                   3771:     }
1.122     albertel 3772:     return $currentstring;
                   3773: }
                   3774: 
1.179     sakharuk 3775: #-- <noembed> tag (end tag required)
1.122     albertel 3776: sub start_noembed {
                   3777:     my ($target,$token) = @_;
                   3778:     my $currentstring = '';
                   3779:     if ($target eq 'web') {
                   3780: 	$currentstring = $token->[4];     
                   3781:     } 
                   3782:     return $currentstring;
                   3783: }
                   3784: 
                   3785: sub end_noembed {
                   3786:     my ($target,$token) = @_;
                   3787:     my $currentstring = '';
                   3788:     if ($target eq 'web') {
                   3789: 	$currentstring = $token->[2];    
                   3790:     } 
                   3791:     return $currentstring;
                   3792: }
                   3793: 
1.179     sakharuk 3794: #-- <noframes> tag (end tag required)
1.122     albertel 3795: sub start_noframes {
                   3796:     my ($target,$token) = @_;
                   3797:     my $currentstring = '';
                   3798:     if ($target eq 'web') {
                   3799: 	$currentstring = $token->[4];     
                   3800:     } 
                   3801:     return $currentstring;
                   3802: }
                   3803: 
                   3804: sub end_noframes {
                   3805:     my ($target,$token) = @_;
                   3806:     my $currentstring = '';
                   3807:     if ($target eq 'web') {
                   3808: 	$currentstring = $token->[2];    
                   3809:     } 
                   3810:     return $currentstring;
                   3811: }
                   3812: 
1.179     sakharuk 3813: #-- <nolayer> tag (end tag required)
1.122     albertel 3814: sub start_nolayer {
                   3815:     my ($target,$token) = @_;
                   3816:     my $currentstring = '';
                   3817:     if ($target eq 'web') {
                   3818: 	$currentstring = $token->[4];     
                   3819:     } 
                   3820:     return $currentstring;
                   3821: }
                   3822: 
                   3823: sub end_nolayer {
                   3824:     my ($target,$token) = @_;
                   3825:     my $currentstring = '';
                   3826:     if ($target eq 'web') {
                   3827: 	$currentstring = $token->[2];    
                   3828:     } 
                   3829:     return $currentstring;
                   3830: }
                   3831: 
1.179     sakharuk 3832: #-- <noscript> tag (end tag required)
1.122     albertel 3833: sub start_noscript {
                   3834:     my ($target,$token) = @_;
                   3835:     my $currentstring = '';
                   3836:     if ($target eq 'web') {
                   3837: 	$currentstring = $token->[4];     
                   3838:     } 
                   3839:     return $currentstring;
                   3840: }
                   3841: 
                   3842: sub end_noscript {
                   3843:     my ($target,$token) = @_;
                   3844:     my $currentstring = '';
                   3845:     if ($target eq 'web') {
                   3846: 	$currentstring = $token->[2];    
                   3847:     } 
                   3848:     return $currentstring;
                   3849: }
                   3850: 
1.179     sakharuk 3851: #-- <object> tag (end tag required)
1.122     albertel 3852: sub start_object {
                   3853:     my ($target,$token) = @_;
                   3854:     my $currentstring = '';
                   3855:     if ($target eq 'web') {
                   3856: 	$currentstring = $token->[4];     
                   3857:     } 
                   3858:     return $currentstring;
                   3859: }
                   3860: 
                   3861: sub end_object {
                   3862:     my ($target,$token) = @_;
                   3863:     my $currentstring = '';
                   3864:     if ($target eq 'web') {
                   3865: 	$currentstring = $token->[2];    
                   3866:     } 
                   3867:     return $currentstring;
                   3868: }
                   3869: 
1.179     sakharuk 3870: #-- <optgroup> tag (end tag required)
1.122     albertel 3871: sub start_optgroup {
                   3872:     my ($target,$token) = @_;
                   3873:     my $currentstring = '';
                   3874:     if ($target eq 'web') {
                   3875: 	$currentstring = $token->[4];     
                   3876:     } 
                   3877:     return $currentstring;
                   3878: }
                   3879: 
                   3880: sub end_optgroup {
                   3881:     my ($target,$token) = @_;
                   3882:     my $currentstring = '';
                   3883:     if ($target eq 'web') {
                   3884: 	$currentstring = $token->[2];    
                   3885:     } 
                   3886:     return $currentstring;
                   3887: }
                   3888: 
1.179     sakharuk 3889: #-- <samp> tag (end tag required)
1.122     albertel 3890: sub start_samp {
                   3891:     my ($target,$token) = @_;
                   3892:     my $currentstring = '';
                   3893:     if ($target eq 'web') {
                   3894: 	$currentstring = $token->[4];     
1.179     sakharuk 3895:     } elsif ($target eq 'tex') {
                   3896: 	$currentstring='\texttt{';
                   3897:     }
1.122     albertel 3898:     return $currentstring;
                   3899: }
                   3900: 
                   3901: sub end_samp {
                   3902:     my ($target,$token) = @_;
                   3903:     my $currentstring = '';
                   3904:     if ($target eq 'web') {
                   3905: 	$currentstring = $token->[2];    
1.179     sakharuk 3906:     } elsif ($target eq 'tex') {
                   3907: 	$currentstring='}';
                   3908:     }
1.122     albertel 3909:     return $currentstring;
                   3910: }
                   3911: 
                   3912: #-- <server> tag
                   3913: sub start_server {
                   3914:     my ($target,$token) = @_;
                   3915:     my $currentstring = '';
                   3916:     if ($target eq 'web') {
                   3917: 	$currentstring = $token->[4];     
                   3918:     } 
                   3919:     return $currentstring;
                   3920: }
                   3921: 
                   3922: sub end_server {
                   3923:     my ($target,$token) = @_;
                   3924:     my $currentstring = '';
                   3925:     if ($target eq 'web') {
                   3926: 	$currentstring = $token->[2];    
                   3927:     } 
                   3928:     return $currentstring;
                   3929: }
                   3930: 
1.179     sakharuk 3931: #-- <spacer> tag (end tag forbidden)
1.122     albertel 3932: sub start_spacer {
                   3933:     my ($target,$token) = @_;
1.279     foxr     3934:     my $currentstring = &end_p();	# Close off any open <p> tag.
1.122     albertel 3935:     if ($target eq 'web') {
1.277     foxr     3936: 	$currentstring .= $token->[4];     
1.122     albertel 3937:     } 
                   3938:     return $currentstring;
                   3939: }
                   3940: 
                   3941: sub end_spacer {
                   3942:     my ($target,$token) = @_;
                   3943:     my $currentstring = '';
                   3944:     if ($target eq 'web') {
                   3945: 	$currentstring = $token->[2];    
                   3946:     } 
                   3947:     return $currentstring;
                   3948: }
                   3949: 
1.179     sakharuk 3950: #-- <span> tag (end tag required)
1.122     albertel 3951: sub start_span {
                   3952:     my ($target,$token) = @_;
                   3953:     my $currentstring = '';
                   3954:     if ($target eq 'web') {
                   3955: 	$currentstring = $token->[4];     
                   3956:     } 
                   3957:     return $currentstring;
                   3958: }
                   3959: 
                   3960: sub end_span {
                   3961:     my ($target,$token) = @_;
                   3962:     my $currentstring = '';
                   3963:     if ($target eq 'web') {
                   3964: 	$currentstring = $token->[2];    
                   3965:     } 
                   3966:     return $currentstring;
                   3967: }
                   3968: 
1.179     sakharuk 3969: #-- <tbody> tag (end tag optional)
1.122     albertel 3970: sub start_tbody {
                   3971:     my ($target,$token) = @_;
                   3972:     my $currentstring = '';
                   3973:     if ($target eq 'web') {
                   3974: 	$currentstring = $token->[4];     
                   3975:     } 
                   3976:     return $currentstring;
                   3977: }
                   3978: 
                   3979: sub end_tbody {
                   3980:     my ($target,$token) = @_;
                   3981:     my $currentstring = '';
                   3982:     if ($target eq 'web') {
                   3983: 	$currentstring = $token->[2];    
                   3984:     } 
                   3985:     return $currentstring;
                   3986: }
                   3987: 
1.166     sakharuk 3988: #-- <tfoot> tag (end tag optional)
1.122     albertel 3989: sub start_tfoot {
                   3990:     my ($target,$token) = @_;
                   3991:     my $currentstring = '';
                   3992:     if ($target eq 'web') {
                   3993: 	$currentstring = $token->[4];     
                   3994:     } 
                   3995:     return $currentstring;
                   3996: }
                   3997: 
                   3998: sub end_tfoot {
                   3999:     my ($target,$token) = @_;
                   4000:     my $currentstring = '';
                   4001:     if ($target eq 'web') {
                   4002: 	$currentstring = $token->[2];    
                   4003:     } 
                   4004:     return $currentstring;
                   4005: }
                   4006: 
1.166     sakharuk 4007: #-- <thead> tag (end tag optional)
1.122     albertel 4008: sub start_thead {
                   4009:     my ($target,$token) = @_;
                   4010:     my $currentstring = '';
                   4011:     if ($target eq 'web') {
                   4012: 	$currentstring = $token->[4];     
                   4013:     } 
                   4014:     return $currentstring;
                   4015: }
1.10      www      4016: 
1.122     albertel 4017: sub end_thead {
                   4018:     my ($target,$token) = @_;
                   4019:     my $currentstring = '';
                   4020:     if ($target eq 'web') {
                   4021: 	$currentstring = $token->[2];    
                   4022:     } 
                   4023:     return $currentstring;
                   4024: }
1.119     www      4025: 
1.122     albertel 4026: #-- <var> tag
                   4027: sub start_var {
1.44      sakharuk 4028:     my ($target,$token) = @_;
                   4029:     my $currentstring = '';
                   4030:     if ($target eq 'web') {
1.122     albertel 4031: 	$currentstring = $token->[4];     
1.163     sakharuk 4032:     } elsif ($target eq 'tex') {
                   4033: 	$currentstring = '\textit{'; 
                   4034:     }
1.44      sakharuk 4035:     return $currentstring;
                   4036: }
1.10      www      4037: 
1.122     albertel 4038: sub end_var {
                   4039:     my ($target,$token) = @_;
1.44      sakharuk 4040:     my $currentstring = '';
                   4041:     if ($target eq 'web') {
1.163     sakharuk 4042: 	$currentstring = $token->[2];
                   4043:     } elsif ($target eq 'tex') {
                   4044: 	$currentstring = '}'; 
1.44      sakharuk 4045:     } 
                   4046:     return $currentstring;
                   4047: }
1.119     www      4048: 
1.163     sakharuk 4049: #-- <wbr> tag (end tag forbidden)
1.122     albertel 4050: sub start_wbr {
                   4051:     my ($target,$token) = @_;
                   4052:     my $currentstring = '';
                   4053:     if ($target eq 'web') {
                   4054: 	$currentstring = $token->[4];     
                   4055:     } 
                   4056:     return $currentstring;
1.98      albertel 4057: }
                   4058: 
1.122     albertel 4059: sub end_wbr {
                   4060:     my ($target,$token) = @_;
                   4061:     my $currentstring = '';
                   4062:     if ($target eq 'web') {
                   4063: 	$currentstring = $token->[2];    
                   4064:     } 
                   4065:     return $currentstring;
1.98      albertel 4066: }
1.134     sakharuk 4067: 
                   4068: #-- <hideweboutput> tag
                   4069: sub start_hideweboutput {
                   4070:     my ($target,$token) = @_;
                   4071:     if ($target eq 'web') {
                   4072: 	&Apache::lonxml::startredirection();     
                   4073:     } 
                   4074:     return '';
                   4075: }
                   4076: 
                   4077: sub end_hideweboutput {
                   4078:     my ($target,$token) = @_;
                   4079:     my $currentstring = '';
                   4080:     if ($target eq 'web') {
                   4081: 	$currentstring = &Apache::lonxml::endredirection();    
                   4082:     } 
                   4083:     return '';
                   4084: }
                   4085: 
1.94      sakharuk 4086: 
                   4087: sub image_replication {
                   4088:     my $src = shift;
1.187     albertel 4089:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   4090:     #replicates eps or ps 
                   4091:     my $epssrc = my $pssrc = $src;
                   4092:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   4093:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   4094:     if (not -e $epssrc && not -e $pssrc) {
                   4095: 	my $result=&Apache::lonnet::repcopy($epssrc);
1.264     raeburn  4096: 	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 4097:     }
                   4098:     return '';
1.195     sakharuk 4099: }
1.275     foxr     4100: #
                   4101: #   Get correct sizing parameter for an image given
                   4102: #   it's initial ht. and wid.  This allows sizing of
                   4103: #   images that are generated on-the-fly (e.g. gnuplot)
                   4104: #   as well as serving as a utility for image_size.
                   4105: # 
                   4106: #  Parameter:
                   4107: #        height_param
                   4108: #        width_param    - Initial picture dimensions.
                   4109: #        scaling        - A scale factor.
                   4110: #        parstack,      - the current stack of tag attributes 
                   4111: #                         from the xml parser
                   4112: #        safeeval,      - pointer to the safespace
                   4113: #        depth,         - from what level in the stack to look for attributes
                   4114: #                         (assumes -1 if unspecified)
                   4115: #        cis            - look for attrubutes case insensitively
                   4116: #                         (assumes false)
                   4117: #
                   4118: # Returns:
                   4119: #   height, width   - new dimensions.
                   4120: #
                   4121: sub resize_image {
                   4122:     my ($height_param, $width_param, $scaling,
                   4123: 	$parstack, $safeeval, $depth, $cis) = @_;
                   4124: 
                   4125:     # First apply the scaling...
1.271     foxr     4126: 
1.275     foxr     4127:     $height_param = $height_param * $scaling;
                   4128:     $width_param  = $width_param  * $scaling;
1.261     foxr     4129: 
1.197     sakharuk 4130:     #do we have any specified LaTeX size of the picture?
1.261     foxr     4131:     my $toget='TeXwidth'; 
                   4132:     if ($cis) { 
                   4133: 	$toget=lc($toget); 
                   4134:     }
1.256     albertel 4135:     my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
                   4136: 					      $safeeval,$depth,$cis);
                   4137:     $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
                   4138:     my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
                   4139: 					       $safeeval,$depth,$cis);
1.197     sakharuk 4140:     #do we have any specified web size of the picture?
                   4141:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
1.256     albertel 4142: 					   $depth,1);
                   4143:     if ($TeXwidth) { 
1.252     matthew  4144: 	my $old_width_param=$width_param;
1.197     sakharuk 4145: 	if ($TeXwidth=~/(\d+)\s*\%/) {
1.267     albertel 4146: 	    $width_param = $1*$env{'form.textwidth'}/100;
1.197     sakharuk 4147: 	} else { 
                   4148: 	    $width_param = $TeXwidth;
                   4149: 	}
1.266     albertel 4150: 	if ($TeXheight) {
                   4151: 	    $height_param = $TeXheight;
                   4152: 	} elsif ($old_width_param) {
                   4153: 	    $height_param=$TeXwidth/$old_width_param*$height_param;
                   4154: 	}
1.256     albertel 4155:     } elsif ($TeXheight) {
1.248     foxr     4156: 	$height_param = $TeXheight;
1.266     albertel 4157: 	if ($height_param) {
                   4158: 	    $width_param  = $TeXheight/$height_param*$width_param;
                   4159: 	}
1.256     albertel 4160:     } elsif ($width) {
1.252     matthew  4161: 	my $old_width_param=$width_param;
1.256     albertel 4162: 	$width_param = $width*$scaling;
1.266     albertel 4163: 	if ($old_width_param) {
                   4164: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4165: 	}
1.252     matthew  4166:     }
1.267     albertel 4167:     if ($width_param > $env{'form.textwidth'}) {
1.252     matthew  4168:         my $old_width_param=$width_param;
1.267     albertel 4169: 	$width_param =0.95*$env{'form.textwidth'};
1.266     albertel 4170: 	if ($old_width_param) {
                   4171: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4172: 	}
1.197     sakharuk 4173:     }
1.275     foxr     4174: 
                   4175:     return ($height_param, $width_param);
                   4176: }
                   4177: 
                   4178: sub image_size {
                   4179:     my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
                   4180: 
                   4181:     #size of image from gif/jpg/jpeg/png 
                   4182:     my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   4183:     if (-e $ressrc) {
                   4184: 	$src = $ressrc;
                   4185:     }
                   4186:     my $image = Image::Magick->new;
                   4187:     my $current_figure = $image->Read($src);
                   4188:     my $width_param = $image->Get('width');
                   4189:     my $height_param = $image->Get('height');
                   4190:     &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
                   4191:     undef($image);
                   4192: 
                   4193:     ($height_param, $width_param) = &resize_image($height_param, $width_param,
                   4194: 						  $scaling, $parstack, $safeeval, 
                   4195: 						  $depth, $cis);
                   4196: 
1.248     foxr     4197:     return ($height_param, $width_param);
                   4198: }
                   4199: 
                   4200: sub image_width {
                   4201:     my ($height, $width) = &image_size(@_);
                   4202:     return $width;
                   4203: }
                   4204: #  Not yet 100% sure this is correct in all circumstances..
                   4205: #  due to my uncertainty about mods to image_size.
                   4206: #
                   4207: sub image_height {
                   4208:     my ($height, $width) = &image_size(@_);
                   4209:     return $height;
1.197     sakharuk 4210: }
                   4211: 
1.256     albertel 4212: sub get_eps_image {
                   4213:     my ($src)=@_;
1.261     foxr     4214:     my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
1.285     foxr     4215: 
                   4216:     # In order to prevent the substitution of the alt text, we need to
                   4217:     # be sure the orig_src file is on system now so:
                   4218: 
                   4219:     if (! -e $orig_src) {
                   4220: 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
                   4221:     }
1.275     foxr     4222:     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
1.282     foxr     4223:     my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
1.256     albertel 4224:     $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
                   4225:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.275     foxr     4226:     &Apache::lonxml::debug("Filelocation gives: $src");
1.256     albertel 4227:     if (! -e $src) {
1.261     foxr     4228: 	&Apache::lonxml::debug("$src does not exist");
1.264     raeburn  4229: 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
1.261     foxr     4230: 	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
1.256     albertel 4231: 	    #if replication failed try to find ps file
                   4232: 	    $src=~s/\.eps$/\.ps/;
1.261     foxr     4233: 	    &Apache::lonxml::debug("Now looking for $src");
1.270     foxr     4234: 	    #if no ps file try to replicate it.
                   4235: 	    my $didrepcopy = &Apache::lonnet::repcopy($src);
                   4236: 	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
                   4237: 	    if ( (not -e $src) ||
                   4238: 		($didrepcopy ne 'ok')) {
1.261     foxr     4239: 		&Apache::lonxml::debug("Failed to find or replicate $src");
                   4240: 
1.256     albertel 4241: 		#if replication failed try to produce eps file dynamically
                   4242: 		$src=~s/\.ps$/\.eps/;
                   4243: 		my $temp_file;
1.267     albertel 4244: 		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.256     albertel 4245: 		my $newsrc=$orig_src;
                   4246: 		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
1.275     foxr     4247: 		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
1.256     albertel 4248: 		print FILE "$newsrc\n";
1.261     foxr     4249: 		close FILE;
1.256     albertel 4250: 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4251: 		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.283     albertel 4252: 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
                   4253: 		    $src =~ s/\.eps$/$sext.eps/;
                   4254: 		}
1.256     albertel 4255: 	    }
                   4256: 	}
                   4257:     }
                   4258:     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
1.261     foxr     4259:     &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
1.256     albertel 4260:     return ($path.'/',$file);
                   4261: }
                   4262: 
1.195     sakharuk 4263: sub eps_generation {
                   4264:     my ($src,$file,$width_param) = @_;	     
1.267     albertel 4265:     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
1.195     sakharuk 4266:     my $temp_file = Apache::File->new('>>'.$filename); 
                   4267:     print $temp_file "$src\n";
                   4268:     my $newsrc = $src;
                   4269:     $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
                   4270:     $newsrc=~s/\/home\/httpd\/html\/res//;
                   4271:     $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
                   4272:     $newsrc=~s/\/\.\//\//;
                   4273:     $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
1.213     sakharuk 4274:     if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
                   4275: 	$newsrc=~s/\/home\/httpd\/lonUsers//;
                   4276: 	$newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
                   4277:     }
1.239     sakharuk 4278:     if ($newsrc=~/\/userfiles\//) {
                   4279: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4280:     } else {
                   4281: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4282:     }
1.197     sakharuk 4283: }
                   4284: 
                   4285: sub file_path {     
                   4286:     my $src=shift;
                   4287:     my ($file,$path); 
                   4288:     if ($src =~ m!(.*)/([^/]*)$!) {
                   4289: 	$file = $2; 
                   4290: 	$path = $1.'/'; 
                   4291:     } 
                   4292:     return $file,$path;
1.126     sakharuk 4293: }
1.294     foxr     4294: #  Converts a measurement in to mm from any of 
                   4295: #  the other valid LaTeX units of measure.
                   4296: #  If the units of measure are missing from the 
                   4297: #  parameter, it is assumed to be in and returned
                   4298: #  with mm units of measure
1.126     sakharuk 4299: sub recalc {
                   4300:     my $argument = shift;
                   4301:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 4302:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 4303:     my $value=$1;
                   4304:     my $units=$2;
                   4305:     if ($units eq 'cm') {
                   4306: 	$value*=10;
                   4307:     } elsif ($units eq 'in') {
                   4308: 	$value*=25.4;
                   4309:     } elsif ($units eq 'pc') {
                   4310: 	$value*=(25.4*12/72.27);
                   4311:     } elsif ($units eq 'pt') {
                   4312: 	$value*=(25.4/72.27);
                   4313:     }
                   4314:     return $value.' mm';
1.94      sakharuk 4315: }
1.184     sakharuk 4316: 
                   4317: sub LATEX_length {
                   4318:     my $garbage=shift;
1.206     sakharuk 4319:     $garbage=~s/^\s+$//;
                   4320:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   4321:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   4322:     $garbage=~s/(\s)+/$1/;#only one space
                   4323:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   4324:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   4325:     $garbage=~s/([^\\])\$/$1/g;#$
                   4326:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   4327:    $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 4328:     $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;
                   4329:     $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;
                   4330:     $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 4331:     $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;
                   4332:     $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;
                   4333:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   4334:     #remove some other LaTeX command
                   4335:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   4336:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   4337:     $garbage=~s|\+|11|g;
1.184     sakharuk 4338:     my  $value=length($garbage);
                   4339:     return $value;
                   4340: }
                   4341: 
                   4342: 
1.287     foxr     4343: # is_inside_of $tagstack $tag
                   4344: #    This sub returns true if the current state of Xml processing
                   4345: #    is inside of the tag.   
                   4346: # Parameters:
                   4347: #     tagstack   - The tagstack from the parser.
                   4348: #     tag        - The tag (without the <>'s.).
                   4349: # Sample usage:
                   4350: #     if (is_inside_of($tagstack "table")) {
                   4351: #          # I'm in a table....
                   4352: #      }
                   4353: sub is_inside_of {
                   4354:     my ($tagstack, $tag) = @_;
                   4355:     my @stack = @$tagstack;
                   4356:     for (my $i = ($#stack - 1); $i >= 0; $i--) {
                   4357: 	if ($stack[$i] eq $tag) {
                   4358: 	    return 1;
                   4359: 	}
                   4360:     }
                   4361:     return 0;
                   4362: }
1.184     sakharuk 4363: 
1.94      sakharuk 4364: 
1.1       sakharuk 4365: 1;
                   4366: __END__

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