Annotation of loncom/xml/londefdef.pm, revision 1.375

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.375   ! foxr        4: # $Id: londefdef.pm,v 1.374 2007/07/17 19:05:24 albertel Exp $
1.41      sakharuk    5: # 
1.34      www         6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
1.156     sakharuk   28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
1.34      www        29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
                     30: # binary executable programs or libraries distributed by the 
                     31: # Michigan State University (the "Licensee"), but any binaries so 
                     32: # distributed are hereby licensed only for use in the context
                     33: # of a program or computational system for which the Licensee is the 
                     34: # primary author or distributor, and which performs substantial 
                     35: # additional tasks beyond the translation of (La)TeX into HTML.
                     36: # The C source of the Code may not be distributed by the Licensee
                     37: # to any other parties under any circumstances.
                     38: #
1.1       sakharuk   39: 
1.2       albertel   40: package Apache::londefdef; 
1.1       sakharuk   41: 
1.267     albertel   42: use Apache::lonnet;
1.1       sakharuk   43: use strict;
1.124     sakharuk   44: use Apache::lonxml;
1.57      sakharuk   45: use Apache::File();
1.70      sakharuk   46: use Image::Magick;
1.118     www        47: use Apache::lonmenu();
                     48: use Apache::lonmeta();
1.187     albertel   49: use Apache::Constants qw(:common);
1.282     foxr       50: use File::Basename;
1.345     albertel   51: use LONCAPA();
1.302     foxr       52: # use Data::Dumper;
1.160     sakharuk   53: 
1.38      harris41   54: BEGIN {
1.15      sakharuk   55: 
1.135     sakharuk   56:     &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   57: 
1.188     albertel   58: }
                     59: 
1.294     foxr       60: #
                     61: #   Dumps all elements of the table structure.
                     62: #   Need this 'cause evidently when given an array, Data::Dumper only seems
                     63: #   to dump element 0.
                     64: #
1.302     foxr       65: #sub debug_dump_table {
                     66: #    my $lastrow = $#Apache::londefdef::table;
                     67: #    &Apache::lonnet::logthis("Dumping table:  Last row index: $lastrow");
                     68: #    my $row;
                     69: #    for ($row =0; $row <= $lastrow; $row++ ) {
                     70: #	my $text = Dumper($Apache::londefdef::table[$row]);
                     71: #	&Apache::lonnet::logthis("table [ $row ]".$text);
                     72: #    }
                     73: #}
1.188     albertel   74: sub initialize_londefdef {
                     75:     $Apache::londefdef::TD_redirection=0;
                     76:     @Apache::londefdef::table = ();
                     77:     $Apache::londefdef::select=0;
1.243     albertel   78:     undef(@Apache::londefdef::description);
                     79:     @Apache::londefdef::DD=(0);
                     80:     @Apache::londefdef::DT=(0);
1.244     albertel   81:     @Apache::londefdef::seenDT=(0);
1.238     albertel   82:     $Apache::londefdef::list_index=0;
1.327     albertel   83:     undef($Apache::londefdef::head);
                     84:     undef($Apache::londefdef::title);
1.3       sakharuk   85: }
1.1       sakharuk   86: 
1.35      sakharuk   87: #======================= TAG SUBROUTINES =====================
1.8       sakharuk   88: #-- <output>
1.21      albertel   89: sub start_output {
1.122     albertel   90:     my ($target) = @_;
                     91:     if ($target eq 'meta') { $Apache::lonxml::metamode--; }
                     92:     return '';
1.21      albertel   93: }
                     94: sub end_output {
1.122     albertel   95:     my ($target) = @_;
                     96:     if ($target eq 'meta') { $Apache::lonxml::metamode++; }
                     97:     return '';
1.21      albertel   98: }
1.4       sakharuk   99: #-- <m> tag
1.33      albertel  100: sub start_m {
1.190     albertel  101:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  102:     my $currentstring = '';
1.193     albertel  103:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
1.191     albertel  104:     if ($target eq 'web' || $target eq 'analyze') {
1.122     albertel  105: 	&Apache::lonxml::debug("M is starting with:$inside:");
                    106: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    107: 	if ($eval eq 'on') {
                    108: 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
                    109: 	    #&Apache::lonxml::debug("M is evaulated to:$inside:");
                    110: 	}
1.317     albertel  111: 	my $tex = $inside;
1.276     albertel  112: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                    113: 	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
1.122     albertel  114: 	if ($Apache::lontexconvert::errorstring) {
1.317     albertel  115: 	    my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
                    116: 	    $tex = &HTML::Entities::encode($tex,'<>&"');
                    117: 	    my ($linenumber) =
                    118: 		($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
                    119: 	    if (defined($linenumber)) {
                    120: 		my @tex=split("\n",$tex);
                    121: 		$tex[$linenumber]='<b><font color="red">'.
                    122: 		    $tex[$linenumber].'</font></b>';
                    123: 		$tex=join("\n",@tex);
                    124: 	    }
                    125: 	    &Apache::lonxml::warning($errormsg.$tex.'</pre>');
1.122     albertel  126: 	    $Apache::lontexconvert::errorstring='';
                    127: 	}
                    128: 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
1.178     albertel  129: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  130:     } elsif ($target eq 'tex') {
1.360     foxr      131: 
1.190     albertel  132: 	$currentstring = $inside;
1.178     albertel  133: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    134: 	if ($eval eq 'on') {
                    135: 	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
                    136: 	}
1.122     albertel  137: 	if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
1.257     albertel  138: 	# detect simple math mode entry exits, and convert them
1.360     foxr      139:         # to use \ensuremath ... unless there's a \verb inside.
                    140: 	if (! ($currentstring=~/\\verb/)) {
                    141: 	    if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
                    142: 		$currentstring=~s/^(\s*)\$/$1/;
                    143: 		$currentstring=~s/\$(\s*)$/$1/;
                    144: 		$currentstring='\ensuremath{'.$currentstring.'}';
                    145: 	    }
1.257     albertel  146: 	}
1.178     albertel  147: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  148:     }
                    149:     return $currentstring;
1.33      albertel  150: }
1.122     albertel  151: 
1.33      albertel  152: sub end_m {
1.122     albertel  153:     my ($target,$token) = @_;
                    154:     my $currentstring = '';
1.204     albertel  155:     if ($target eq 'tex') {
1.122     albertel  156: 	$currentstring = "";
                    157:     }
                    158:     return $currentstring;
1.33      albertel  159: }
1.110     albertel  160: 
                    161: sub start_tthoption {
1.299     albertel  162:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  163:     my $result;
1.325     albertel  164:     if ($target eq 'web' || $target eq 'webgrade') {
1.299     albertel  165: 	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
                    166: 						   $style);
1.122     albertel  167: 	$inside=~s/^\s*//;
1.267     albertel  168: 	if ($env{'browser.mathml'}) {
1.122     albertel  169: 	    &tth::ttmoptions($inside);
                    170: 	} else {
                    171: 	    &tth::tthoptions($inside);
                    172: 	}
                    173:     }
                    174:     return $result;
1.110     albertel  175: }
                    176: 
                    177: sub end_tthoption {
1.122     albertel  178:     my ($target,$token) = @_;
                    179:     my $result;
                    180:     return $result;
1.110     albertel  181: }
                    182: 
1.181     sakharuk  183: #-- <html> tag (end tag optional)
1.100     albertel  184: sub start_html {
                    185:     my ($target,$token) = @_;
                    186:     my $currentstring = '';
1.269     albertel  187:     if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
1.327     albertel  188: 	# start_body() takes care of emitting the <html> 
1.100     albertel  189:     } elsif ($target eq 'tex') {
1.331     albertel  190: 	$currentstring .= 
                    191: 	    '\documentclass[letterpaper,twoside]{article}\raggedbottom';
1.267     albertel  192: 	if (($env{'form.latex_type'}=~'batchmode') ||
                    193:             (!$env{'request.role.adv'})) {$currentstring .='\batchmode';} 
1.217     sakharuk  194: 	$currentstring .= '\newcommand{\keephidden}[1]{}'.
                    195:                           '\renewcommand{\deg}{$^{\circ}$}'.
1.306     foxr      196: 			  '\usepackage{multirow}'.
1.217     sakharuk  197:                           '\usepackage{longtable}'.
                    198:                           '\usepackage{textcomp}'.
                    199:                           '\usepackage{makeidx}'.
                    200:                           '\usepackage[dvips]{graphicx}'.
1.286     foxr      201: 			  '\usepackage{wrapfig}'.
1.248     foxr      202: 			  '\usepackage{picins}'.
1.217     sakharuk  203:                           '\usepackage{epsfig}'.
                    204:                           '\usepackage{calc}'.
                    205:                           '\usepackage{amsmath}'.
                    206:                           '\usepackage{amssymb}'.
                    207:                           '\usepackage{amsfonts}'.
                    208:                           '\usepackage{amsthm}'.
                    209:                           '\usepackage{amscd}'.
                    210:                           '\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}}'.
                    211:                           '\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  212:     }
                    213:     return $currentstring;
                    214: }
1.122     albertel  215: 
                    216: sub end_html {
1.232     sakharuk  217:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  218:     my $currentstring = '';
1.324     albertel  219:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  220: 	# end_body takes care of the </html>
1.122     albertel  221:     }
                    222:     return $currentstring;
                    223: }
                    224: 
1.181     sakharuk  225: #-- <head> tag (end tag optional)
1.122     albertel  226: sub start_head {
                    227:     my ($target,$token) = @_;
                    228:     my $currentstring = '';
1.324     albertel  229:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  230: 	&Apache::lonxml::startredirection();
1.122     albertel  231:     } 
                    232:     return $currentstring;
                    233: }
                    234: 
                    235: sub end_head {
                    236:     my ($target,$token) = @_;
                    237:     my $currentstring = '';
1.324     albertel  238:     if (($target eq 'web'      && $env{'request.state'} eq 'published') ||
                    239: 	($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
1.327     albertel  240: 	# in case there is a </head> but no <head>
                    241: 	if ($Apache::lonxml::redirection) {
                    242: 	    $Apache::londefdef::head = &Apache::lonxml::endredirection();
                    243: 	}
1.122     albertel  244:     } 
                    245:     return $currentstring;
                    246: }
                    247: 
1.181     sakharuk  248: #-- <map> tag (end tag required)
1.122     albertel  249: sub start_map {
                    250:     my ($target,$token) = @_;
                    251:     my $currentstring = '';
1.325     albertel  252:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  253: 	$currentstring = $token->[4];     
                    254:     } 
                    255:     return $currentstring;
                    256: }
                    257: 
                    258: sub end_map {
                    259:     my ($target,$token) = @_;
                    260:     my $currentstring = '';
1.325     albertel  261:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  262: 	$currentstring = $token->[2];    
                    263:     } 
                    264:     return $currentstring;
                    265: }
                    266: 
1.181     sakharuk  267: #-- <select> tag (end tag required)
1.122     albertel  268: sub start_select {
                    269:     my ($target,$token) = @_;
                    270:     my $currentstring = '';
1.325     albertel  271:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  272: 	$currentstring = $token->[4];     
1.181     sakharuk  273:     }  elsif ($target eq 'tex') {
                    274: 	$Apache::londefdef::select=0;
                    275:     }
1.122     albertel  276:     return $currentstring;
                    277: }
                    278: 
                    279: sub end_select {
                    280:     my ($target,$token) = @_;
                    281:     my $currentstring = '';
1.325     albertel  282:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  283: 	$currentstring = $token->[2];    
                    284:     } 
                    285:     return $currentstring;
                    286: }
                    287: 
1.181     sakharuk  288: #-- <option> tag (end tag optional)
1.122     albertel  289: sub start_option {
1.181     sakharuk  290:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  291:     my $currentstring = '';
1.325     albertel  292:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  293: 	$currentstring = $token->[4];     
1.181     sakharuk  294:     } elsif ($target eq 'tex') {
                    295: 	$Apache::londefdef::select++;
                    296: 	if ($Apache::londefdef::select == 1) {
                    297: 	    $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
                    298: 	} else {
                    299: 	    $currentstring='\keephidden{';
                    300: 	}
                    301:     }
1.122     albertel  302:     return $currentstring;
                    303: }
                    304: 
                    305: sub end_option {
                    306:     my ($target,$token) = @_;
                    307:     my $currentstring = '';
1.325     albertel  308:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  309: 	$currentstring = $token->[2];    
1.181     sakharuk  310:     }  elsif ($target eq 'tex') {
                    311: 	$currentstring='}';
                    312:     }
1.122     albertel  313:     return $currentstring;
                    314: }
                    315: 
1.181     sakharuk  316: #-- <input> tag (end tag forbidden)
1.122     albertel  317: sub start_input {
                    318:     my ($target,$token) = @_;
                    319:     my $currentstring = '';
1.325     albertel  320:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  321: 	$currentstring = $token->[4];     
                    322:     } 
                    323:     return $currentstring;
                    324: }
                    325: 
                    326: sub end_input {
                    327:     my ($target,$token) = @_;
                    328:     my $currentstring = '';
1.325     albertel  329:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  330: 	$currentstring = $token->[2];    
                    331:     } 
                    332:     return $currentstring;
                    333: }
                    334: 
1.181     sakharuk  335: #-- <textarea> tag (end tag required)
1.122     albertel  336: sub start_textarea {
                    337:     my ($target,$token) = @_;
                    338:     my $currentstring = '';
1.325     albertel  339:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  340: 	$currentstring = $token->[4];     
                    341:     } 
                    342:     return $currentstring;
                    343: }
                    344: 
                    345: sub end_textarea {
                    346:     my ($target,$token) = @_;
                    347:     my $currentstring = '';
1.325     albertel  348:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  349: 	$currentstring = $token->[2];    
                    350:     } 
                    351:     return $currentstring;
                    352: }
                    353: 
1.181     sakharuk  354: #-- <form> tag (end tag required)
1.122     albertel  355: sub start_form {
                    356:     my ($target,$token) = @_;
                    357:     my $currentstring = '';
1.325     albertel  358:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  359: 	$currentstring = $token->[4];     
                    360:     } 
                    361:     return $currentstring;
                    362: }
                    363: 
                    364: sub end_form {
                    365:     my ($target,$token) = @_;
                    366:     my $currentstring = '';
1.325     albertel  367:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  368: 	$currentstring = $token->[2];    
                    369:     } 
                    370:     return $currentstring;
                    371: }
                    372: 
1.181     sakharuk  373: #-- <title> tag (end tag required)
1.122     albertel  374: sub start_title {
1.327     albertel  375:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  376:     my $currentstring = '';
1.324     albertel  377:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  378: 	$Apache::londefdef::title = 
                    379: 	    &Apache::lonxml::get_all_text('/title',$parser,$style);
1.122     albertel  380:     } elsif ($target eq 'tex') {
1.166     sakharuk  381: 	$currentstring .= '\keephidden{Title of the document:  ' 
1.122     albertel  382:     }
                    383:     if ($target eq 'meta') {
                    384: 	$currentstring='<title>';
1.185     albertel  385: 	&start_output($target);
1.122     albertel  386:     }
                    387:     return $currentstring;
                    388: }
                    389: 
                    390: sub end_title {
                    391:     my ($target,$token) = @_;
                    392:     my $currentstring = '';
1.324     albertel  393:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  394: 	# start_title takes care of swallowing the title
1.122     albertel  395:     } elsif ($target eq 'tex') {
                    396: 	$currentstring .= '}';
                    397:     }  
                    398:     if ($target eq 'meta') {
1.185     albertel  399: 	&end_output($target);
1.122     albertel  400: 	$currentstring='</title>';
                    401:     } 
                    402:     return $currentstring;
                    403: }
                    404: 
1.181     sakharuk  405: #-- <meta> tag (end tag forbidden)
1.122     albertel  406: sub start_meta {
1.299     albertel  407:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  408:     my $currentstring = '';
1.325     albertel  409:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  410: 	my $args='';
                    411: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    412: 	if ($args eq '') {
1.299     albertel  413: 	    &Apache::lonxml::get_all_text("/meta",$parser,$style);
1.122     albertel  414: 	} else {
                    415: 	    $currentstring = $token->[4];
1.1       sakharuk  416: 	}
1.135     sakharuk  417:     } elsif ($target eq 'meta') {
1.122     albertel  418: 	unless (&Apache::lonxml::get_param
                    419: 		('http-equiv',$parstack,$safeeval,undef,1)) {
                    420: 	    my $name=$token->[2]->{'name'};
                    421: 	    $name=~tr/A-Z/a-z/;
                    422: 	    $name=~s/\s/\_/gs;
                    423: 	    $name=~s/\W//gs;
                    424: 	    if ($name) {
1.154     www       425: 		$currentstring='<'.$name;
                    426:                  my $display=&Apache::lonxml::get_param
                    427: 		('display',$parstack,$safeeval,undef,1);
                    428:                 if ($display) {
                    429:                     $display=~s/\"/\'/g;
                    430: 		    $currentstring.=' display="'.$display.'"';
                    431:                 }
                    432: 		$currentstring.='>'.
1.122     albertel  433: 		    &Apache::lonxml::get_param
                    434: 			('content',$parstack,$safeeval,undef,1).
1.135     sakharuk  435: 			'</'.$name.'>';
1.1       sakharuk  436: 	    }
1.154     www       437:             my $display=&Apache::lonxml::get_param
                    438: 		('display',$parstack,$safeeval,undef,1);
                    439:             if ($display) {
1.204     albertel  440: 		$display=&HTML::Entities::encode($display,'<>&"');
1.154     www       441: 		$currentstring.='<'.$name.'.display>'.$display.
                    442:                                '</'.$name.'.display>';
                    443:             }
1.1       sakharuk  444: 	}
1.135     sakharuk  445:     } elsif ($target eq 'tex') {
1.151     sakharuk  446: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    447: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
                    448: 	if ((not defined $content) && (not defined $name)) {
                    449: 	    &Apache::lonxml::startredirection();
                    450: 	}
1.374     albertel  451:     } elsif ($target eq 'edit') {
                    452: 	$currentstring .= &Apache::edit::tag_start($target,$token);
                    453: 	$currentstring .= &Apache::edit::text_arg('Name:','name',$token,30);
                    454: 	$currentstring .= &Apache::edit::text_arg('Content:','content',$token,70);
                    455: 	$currentstring .= &Apache::edit::end_row();
                    456:     } elsif ($target eq 'modified') {
                    457: 	my $constructtag =
                    458: 	    &Apache::edit::get_new_args($token,$parstack,$safeeval,
                    459: 					'name','content');
                    460: 	if ($constructtag) { $currentstring = &Apache::edit::rebuild_tag($token); }
1.122     albertel  461:     }
                    462:     return $currentstring;
                    463: }
                    464: 
                    465: sub end_meta {
1.165     albertel  466:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  467:     my $currentstring = '';
1.325     albertel  468:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  469: 	my $args='';
                    470: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    471: 	if ($args ne '') {
1.121     www       472: 	    $currentstring = $token->[4];
1.122     albertel  473: 	}
1.135     sakharuk  474:     } elsif ($target eq 'tex') {
1.165     albertel  475: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    476: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
1.164     albertel  477: 	if ((not defined $content) && (not defined $name)) {
1.169     albertel  478: 	    &Apache::lonxml::endredirection();
1.164     albertel  479: 	}
1.135     sakharuk  480:     }
1.122     albertel  481:     return $currentstring;
                    482: }
                    483: 
1.374     albertel  484: sub insert_meta {
                    485:     return '
                    486:     <meta />';
                    487: }
                    488: 
1.121     www       489: # accessrule
1.122     albertel  490: sub start_accessrule {
1.299     albertel  491:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  492:     my $currentstring = '';
1.373     albertel  493:     my $eff  =&Apache::lonxml::get_param('effect',$parstack,$safeeval,undef,1);
                    494:     my $realm=&Apache::lonxml::get_param('realm', $parstack,$safeeval,undef,1);
                    495:     my $role =&Apache::lonxml::get_param('role',  $parstack,$safeeval,undef,1);
                    496:     my $type =&Apache::lonxml::get_param('type',  $parstack,$safeeval,undef,1);
                    497: 
                    498:     my ($dom,$crs,$sec,$separator);
1.369     albertel  499:     if ($type eq 'user') {
1.373     albertel  500: 	($dom,$crs,$sec)=split(m{/},$realm);
1.369     albertel  501: 	$crs = &LONCAPA::clean_username($crs);
1.373     albertel  502: 	$separator = '/';
1.369     albertel  503:     } else {
1.373     albertel  504: 	($dom,$crs,$sec)=split(/\_/,$realm);
1.369     albertel  505: 	$crs = &LONCAPA::clean_courseid($crs);
1.373     albertel  506: 	$separator = '_';
1.369     albertel  507:     }
1.373     albertel  508:     $dom = &LONCAPA::clean_domain($dom);
                    509: 
1.369     albertel  510:     $sec =~s/\W//;
                    511:     $realm = $dom;
1.373     albertel  512:     if ($crs =~ /\S/) { $realm .= $separator.$crs; }
                    513:     if ($sec =~ /\S/) { $realm .= $separator.$sec; }
1.369     albertel  514:     $role=~s/\W//g;
                    515: 
1.122     albertel  516:     if ($target eq 'web') {
                    517: 	my $args='';
                    518: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    519: 	if ($args eq '') {
1.299     albertel  520: 	    &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
1.122     albertel  521: 	} else {
                    522: 	    $currentstring = $token->[4];
                    523: 	}
                    524:     }
                    525:     if ($target eq 'meta') {
1.369     albertel  526: 	$currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
1.122     albertel  527:     }
                    528:     return $currentstring;
                    529: }
                    530: 
                    531: sub end_accessrule {
                    532:     my ($target,$token,$tagstack,$parstack,$parser) = @_;
                    533:     my $currentstring = '';
                    534:     if ($target eq 'web') {
                    535: 	my $args='';
                    536: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    537: 	if ($args ne '') {
                    538: 	    $currentstring = $token->[4];
                    539: 	}
                    540:     } 
                    541:     return $currentstring;
                    542: }
                    543: 
1.366     albertel  544: sub generate_css_links {
                    545:     my $links;
                    546:     my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
                    547:     if ($css_href =~ /\S/) {
                    548: 	&Apache::lonxml::extlink($css_href);
                    549: 	$links .= 
                    550: 	    '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
                    551:     }
                    552:     return $links;
                    553: }
                    554: 
1.181     sakharuk  555: #-- <body> tag (end tag required)
1.122     albertel  556: sub start_body {
                    557:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    558:     my $currentstring = '';
1.244     albertel  559: 
1.324     albertel  560:     if ($target eq 'web' || $target eq 'webgrade') {
1.170     albertel  561: 	if ($Apache::lonhomework::parsing_a_problem) {
                    562: 	    &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
                    563: 	    return '';
                    564: 	}
1.122     albertel  565: 	
1.327     albertel  566: 	if (&is_inside_of($tagstack, "head")) {
                    567: 	    &end_head(@_);
1.122     albertel  568: 	}
1.366     albertel  569: 	
                    570: 	my $extra_head = &generate_css_links();
                    571: 
1.327     albertel  572: 	$currentstring = 
                    573: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
1.366     albertel  574: 					   $Apache::londefdef::head
                    575: 					      .$extra_head,
1.327     albertel  576: 					   {'add_entries'    => $token->[2],
                    577: 					    'no_title'       => 1,
                    578: 					    'force_register' => 1});
                    579: 
1.267     albertel  580: 	if ($env{'request.state'} ne 'published') {
1.330     albertel  581: 	    $currentstring.=&Apache::lonmenu::constspaceform();
1.122     albertel  582: 	    $currentstring.=(<<EDITBUTTON);
1.278     www       583: <form method="post">
                    584: <input type="submit" name="editmode" accesskey="e" value="Edit" />
                    585: </form>
1.327     albertel  586: <br />
1.40      albertel  587: EDITBUTTON
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 $currentstring = &end_p();	# Close off unclosed <p>
1.324     albertel  599:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  600: 	$currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
1.122     albertel  601:     } elsif ($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 $currentstring;
                    605: }
                    606: 
1.309     albertel  607: # \begin{center} causes a new paragprah spacing that looks odd inside 
1.337     foxr      608: # of a table cell.  Same at the end of a \center but with a slightly
                    609: # larger space .. hence center_correction and center_end_correction.
                    610: #
                    611: sub center_correction { return '\vspace*{-6 mm}'; } 
                    612: sub center_end_correction { return '\vspace*{-7 mm}'; }
                    613: 
1.181     sakharuk  614: #-- <center> tag (end tag required)
1.122     albertel  615: sub start_center {
1.309     albertel  616:     my ($target,$token,$tagstack) = @_;
1.279     foxr      617:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  618:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr      619: 	$currentstring .= $token->[4];     
1.122     albertel  620:     } elsif ($target eq 'tex') {
1.309     albertel  621: 	if (&is_inside_of($tagstack, "table")) {
                    622: 	    $currentstring .= &center_correction();
                    623: 	}
1.277     foxr      624: 	$currentstring .= '\begin{center}';  
1.144     sakharuk  625:     }
1.122     albertel  626:     return $currentstring;
                    627: }
                    628: 
                    629: sub end_center {
1.309     albertel  630:     my ($target,$token,$tagstack) = @_;
1.122     albertel  631:     my $currentstring = '';
1.325     albertel  632:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  633: 	$currentstring = $token->[2];     
                    634:     } elsif ($target eq 'tex') {
                    635: 	$currentstring = '\end{center}';  
1.337     foxr      636: 	if (&is_inside_of($tagstack, "table")) {
                    637: 	    $currentstring .= &center_end_correction();
                    638: 	}
1.144     sakharuk  639:     }
1.122     albertel  640:     return $currentstring;
                    641: }
                    642: 
1.181     sakharuk  643: #-- <b> tag (end tag required)
1.279     foxr      644: #      NOTE: In TeX mode disables internal <p>
1.122     albertel  645: sub start_b {
                    646:     my ($target,$token) = @_;
                    647:     my $currentstring = '';
1.325     albertel  648:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  649: 	$currentstring = $token->[4];     
                    650:     } elsif ($target eq 'tex') {
1.279     foxr      651: 	&disable_para();
                    652: 	$currentstring .= '\textbf{';  
1.122     albertel  653:     } 
                    654:     return $currentstring;
                    655: }
                    656: 
                    657: sub end_b {
                    658:     my ($target,$token) = @_;
                    659:     my $currentstring = '';
1.325     albertel  660:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  661: 	$currentstring = $token->[2];     
                    662:     } elsif ($target eq 'tex') {
1.279     foxr      663: 	&enable_para();
                    664: 	$currentstring = '}';
1.122     albertel  665:     } 
                    666:     return $currentstring;
                    667: }
1.35      sakharuk  668: 
1.181     sakharuk  669: #-- <strong> tag (end tag required)
1.279     foxr      670: #    NOTE: in TeX mode disables internal <p>
1.122     albertel  671: sub start_strong {
                    672:     my ($target,$token) = @_;
                    673:     my $currentstring = '';
1.325     albertel  674:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  675: 	$currentstring = $token->[4];     
                    676:     } elsif ($target eq 'tex') {
1.279     foxr      677: 	&disable_para();
1.122     albertel  678: 	$currentstring = '\textbf{';  
                    679:     } 
                    680:     return $currentstring;
                    681: }
                    682: 
                    683: sub end_strong {
                    684:     my ($target,$token) = @_;
                    685:     my $currentstring = '';
1.325     albertel  686:     if ($target eq 'web' || $target eq 'webgrade') {	
1.122     albertel  687: 	$currentstring = $token->[2];     
                    688:     } elsif ($target eq 'tex') {
1.279     foxr      689: 	&enable_para();
1.122     albertel  690: 	$currentstring = '}';  
1.144     sakharuk  691:     }
1.122     albertel  692:     return $currentstring;
                    693: }
                    694: 
1.181     sakharuk  695: #-- <h1> tag (end tag required)
1.122     albertel  696: sub start_h1 {
1.125     sakharuk  697:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      698:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  699:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  700: 	$currentstring .= $token->[4];
                    701:     } elsif ($target eq 'tex') {
1.125     sakharuk  702: 	my $pre;
1.199     albertel  703: 	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
1.212     sakharuk  704: 	if ($align eq 'center') {
1.125     sakharuk  705: 	    $pre='\begin{center}';
                    706: 	} elsif ($align eq 'left') {
                    707: 	    $pre='\rlap{';
                    708: 	} elsif ($align eq 'right') {
                    709: 	    $pre=' \hfill \llap{';
                    710: 	}
                    711: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    712: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      713: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  714:     } elsif ($target eq 'meta') {
1.277     foxr      715: 	$currentstring.='<subject>';
1.185     albertel  716: 	&start_output($target);
1.122     albertel  717:     }
                    718:     return $currentstring;
                    719: }
                    720: 
                    721: sub end_h1 {
1.125     sakharuk  722:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  723:     my $currentstring = '';
1.325     albertel  724:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  725: 	$currentstring .= $token->[2];
                    726:     } elsif ($target eq 'tex') {
1.212     sakharuk  727: 	my $post='\vskip 0 mm ';
1.125     sakharuk  728: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  729: 	if ($align eq 'center') {
1.125     sakharuk  730: 	    $post='\end{center}';
                    731: 	} elsif ($align eq 'left') {
                    732: 	    $post='} \hfill'.'\vskip 0 mm ';
                    733: 	} elsif ($align eq 'right') {
                    734: 	    $post='}'.'\vskip 0 mm ';
                    735: 	}
                    736: 	$currentstring .= '}}'.$post;
1.122     albertel  737:     } elsif ($target eq 'meta') {
1.185     albertel  738: 	&end_output($target);
1.122     albertel  739: 	$currentstring='</subject>';
                    740:     } 
                    741:     return $currentstring;
                    742: }
                    743: 
1.35      sakharuk  744: #-- <h2> tag
1.122     albertel  745: sub start_h2 {
1.125     sakharuk  746:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      747:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  748:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  749: 	$currentstring .= $token->[4];
                    750:     } elsif ($target eq 'tex') {
1.125     sakharuk  751: 	my $pre;
                    752: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  753: 	if ($align eq 'center') {
1.125     sakharuk  754: 	    $pre='\begin{center}';
                    755: 	} elsif ($align eq 'left') {
                    756: 	    $pre='\rlap{';
                    757: 	} elsif ($align eq 'right') {
                    758: 	    $pre=' \hfill \llap{';
                    759: 	}
                    760: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    761: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      762: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  763:     } 
                    764:     return $currentstring;
                    765: }
                    766: 
                    767: sub end_h2 {
1.125     sakharuk  768:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  769:     my $currentstring = '';
1.325     albertel  770:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  771: 	$currentstring .= $token->[2];
                    772:     } elsif ($target eq 'tex') {
1.212     sakharuk  773: 	my $post='\vskip 0 mm ';
1.125     sakharuk  774: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  775: 	if ($align eq 'center') {
1.125     sakharuk  776: 	    $post='\end{center}';
                    777: 	} elsif ($align eq 'left') {
                    778: 	    $post='} \hfill'.'\vskip 0 mm ';
                    779: 	} elsif ($align eq 'right') {
                    780: 	    $post='}'.'\vskip 0 mm ';
                    781: 	}
                    782: 	$currentstring .= '}}'.$post;
1.122     albertel  783:     } 
                    784:     return $currentstring;
                    785: }
                    786: 
1.35      sakharuk  787: #-- <h3> tag
1.122     albertel  788: sub start_h3 {
1.125     sakharuk  789:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      790:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  791:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  792: 	$currentstring .= $token->[4];
                    793:     } elsif ($target eq 'tex') {
1.125     sakharuk  794: 	my $pre;
                    795: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  796: 	if ($align eq 'center') {
1.125     sakharuk  797: 	    $pre='\begin{center}';
                    798: 	} elsif ($align eq 'left') {
                    799: 	    $pre='\rlap{';
                    800: 	} elsif ($align eq 'right') {
                    801: 	    $pre=' \hfill \llap{';
                    802: 	}
                    803: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    804: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      805: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  806:     } 
                    807:     return $currentstring;
                    808: }
                    809: 
                    810: sub end_h3 {
1.125     sakharuk  811:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  812:     my $currentstring = '';
1.325     albertel  813:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  814: 	$currentstring .= $token->[2];
                    815:     } elsif ($target eq 'tex') {
1.212     sakharuk  816: 	my $post='\vskip 0 mm ';
1.125     sakharuk  817: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  818: 	if ($align eq 'center') {
1.125     sakharuk  819: 	    $post='\end{center}';
                    820: 	} elsif ($align eq 'left') {
                    821: 	    $post='} \hfill'.'\vskip 0 mm ';
                    822: 	} elsif ($align eq 'right') {
                    823: 	    $post='}'.'\vskip 0 mm ';
                    824: 	}
                    825: 	$currentstring .= '}}'.$post;
1.122     albertel  826:     } 
                    827:     return $currentstring;
                    828: }
                    829: 
1.35      sakharuk  830: #-- <h4> tag
1.122     albertel  831: sub start_h4 {
1.125     sakharuk  832:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      833:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  834:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  835: 	$currentstring .= $token->[4];
                    836:     } elsif ($target eq 'tex') {
1.125     sakharuk  837: 	my $pre;
                    838: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  839: 	if ($align eq 'center') {
1.125     sakharuk  840: 	    $pre='\begin{center}';
                    841: 	} elsif ($align eq 'left') {
                    842: 	    $pre='\rlap{';
                    843: 	} elsif ($align eq 'right') {
                    844: 	    $pre=' \hfill \llap{';
                    845: 	}
                    846: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    847: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      848: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  849:     } 
                    850:     return $currentstring;
                    851: }
                    852: 
                    853: sub end_h4 {
1.125     sakharuk  854:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  855:     my $currentstring = '';
1.325     albertel  856:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  857: 	$currentstring .= $token->[2];
                    858:     } elsif ($target eq 'tex') {
1.212     sakharuk  859: 	my $post='\vskip 0 mm ';
1.125     sakharuk  860: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  861: 	if ($align eq 'center') {
1.125     sakharuk  862: 	    $post='\end{center}';
                    863: 	} elsif ($align eq 'left') {
                    864: 	    $post='} \hfill'.'\vskip 0 mm ';
                    865: 	} elsif ($align eq 'right') {
                    866: 	    $post='}'.'\vskip 0 mm ';
                    867: 	}
                    868: 	$currentstring .= '}}'.$post;
1.122     albertel  869:     } 
                    870:     return $currentstring;
                    871: }
                    872: 
1.35      sakharuk  873: #-- <h5> tag
1.122     albertel  874: sub start_h5 {
1.125     sakharuk  875:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      876:     my $currentstring = &end_p();	# Close off any prior paras.
1.325     albertel  877:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  878: 	$currentstring .= $token->[4];
                    879:     } elsif ($target eq 'tex') {
1.125     sakharuk  880: 	my $pre;
                    881: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  882: 	if ($align eq 'center') {
1.125     sakharuk  883: 	    $pre='\begin{center}';
                    884: 	} elsif ($align eq 'left') {
                    885: 	    $pre='\rlap{';
                    886: 	} elsif ($align eq 'right') {
                    887: 	    $pre=' \hfill \llap{';
                    888: 	}
                    889: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    890: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      891: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  892:     } 
                    893:     return $currentstring;
                    894: }
                    895: 
                    896: sub end_h5 {
1.125     sakharuk  897:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  898:     my $currentstring = '';
1.325     albertel  899:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  900: 	$currentstring .= $token->[2];
                    901:     } elsif ($target eq 'tex') {
1.212     sakharuk  902: 	my $post='\vskip 0 mm ';
1.125     sakharuk  903: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  904: 	if ($align eq 'center') {
1.125     sakharuk  905: 	    $post='\end{center}';
                    906: 	} elsif ($align eq 'left') {
                    907: 	    $post='} \hfill'.'\vskip 0 mm ';
                    908: 	} elsif ($align eq 'right') {
                    909: 	    $post='}'.'\vskip 0 mm ';
                    910: 	}
                    911: 	$currentstring .= '}}'.$post;
1.122     albertel  912:     } 
                    913:     return $currentstring;
                    914: }
                    915: 
1.35      sakharuk  916: #-- <h6> tag
1.122     albertel  917: sub start_h6 {
1.125     sakharuk  918:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      919:     my $currentstring = &end_p();	# Close off any prior paras.
1.325     albertel  920:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  921: 	$currentstring .= $token->[4];
                    922:     } elsif ($target eq 'tex') {
1.125     sakharuk  923: 	my $pre;
                    924: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  925: 	if ($align eq 'center') {
1.125     sakharuk  926: 	    $pre='\begin{center}';
                    927: 	} elsif ($align eq 'left') {
                    928: 	    $pre='\rlap{';
                    929: 	} elsif ($align eq 'right') {
                    930: 	    $pre=' \hfill \llap{';
                    931: 	}
                    932: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    933: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      934: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  935:     } 
                    936:     return $currentstring;
                    937: }
                    938: 
                    939: sub end_h6 {
1.125     sakharuk  940:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  941:     my $currentstring = '';
1.325     albertel  942:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  943: 	$currentstring .= $token->[2];
                    944:     } elsif ($target eq 'tex') {
1.212     sakharuk  945: 	my $post='\vskip 0 mm ';
1.125     sakharuk  946: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  947: 	if ($align eq 'center') {
1.125     sakharuk  948: 	    $post='\end{center}';
                    949: 	} elsif ($align eq 'left') {
                    950: 	    $post='} \hfill'.'\vskip 0 mm ';
                    951: 	} elsif ($align eq 'right') {
                    952: 	    $post='}'.'\vskip 0 mm ';
                    953: 	}
                    954: 	$currentstring .= '}}'.$post;
1.122     albertel  955:     } 
                    956:     return $currentstring;
                    957: }
                    958: 
1.181     sakharuk  959: #--- <cite> tag (end tag required)
1.122     albertel  960: sub start_cite {
                    961:     my ($target,$token) = @_;
                    962:     my $currentstring = '';
1.325     albertel  963:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  964: 	$currentstring .= $token->[4];
                    965:     } elsif ($target eq 'tex') {
1.179     sakharuk  966: 	$currentstring .= '\textit{';
1.144     sakharuk  967:     }
1.122     albertel  968:     return $currentstring;
                    969: }
                    970: 
                    971: sub end_cite {
                    972:     my ($target,$token) = @_;
                    973:     my $currentstring = '';
1.325     albertel  974:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  975: 	$currentstring .= $token->[2];
                    976:     } elsif ($target eq 'tex') {
1.179     sakharuk  977: 	$currentstring .= '}';
1.144     sakharuk  978:     }
1.122     albertel  979:     return $currentstring;
                    980: }
                    981: 
1.181     sakharuk  982: #-- <i> tag (end tag required)
1.122     albertel  983: sub start_i {
                    984:     my ($target,$token) = @_;
                    985:     my $currentstring = '';
1.325     albertel  986:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  987: 	$currentstring .= $token->[4];
                    988:     } elsif ($target eq 'tex') {
                    989: 	$currentstring .= '\textit{';
1.144     sakharuk  990:     }
1.122     albertel  991:     return $currentstring;
                    992: }
                    993: 
                    994: sub end_i {
                    995:     my ($target,$token) = @_;
                    996:     my $currentstring = '';
1.325     albertel  997:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  998: 	$currentstring .= $token->[2];
                    999:     } elsif ($target eq 'tex') {
                   1000: 	$currentstring .= '}';
                   1001:     } 
                   1002:     return $currentstring;
                   1003: }
                   1004: 
1.181     sakharuk 1005: #-- <address> tag (end tag required)
1.122     albertel 1006: sub start_address {
                   1007:     my ($target,$token) = @_;
                   1008:     my $currentstring = '';
1.325     albertel 1009:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1010: 	$currentstring .= $token->[4];
                   1011:     } elsif ($target eq 'tex') {
1.179     sakharuk 1012: 	$currentstring .= '\textit{';
1.144     sakharuk 1013:     }
1.122     albertel 1014:     return $currentstring;
                   1015: }
                   1016: 
                   1017: sub end_address {
                   1018:     my ($target,$token) = @_;
                   1019:     my $currentstring = '';
1.325     albertel 1020:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1021: 	$currentstring .= $token->[2];
                   1022:     } elsif ($target eq 'tex') {
1.179     sakharuk 1023: 	$currentstring .= '}';
1.122     albertel 1024:     }
                   1025:     return $currentstring;
                   1026: }
                   1027: 
1.181     sakharuk 1028: #-- <dfn> tag (end tag required)
1.122     albertel 1029: sub start_dfn {
                   1030:     my ($target,$token) = @_;
                   1031:     my $currentstring = '';
1.325     albertel 1032:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1033: 	$currentstring .= $token->[4];
                   1034:     } elsif ($target eq 'tex') {
1.179     sakharuk 1035: 	$currentstring .= '\textit{';
1.122     albertel 1036:     } 
                   1037:     return $currentstring;
                   1038: }
                   1039: 
                   1040: sub end_dfn {
                   1041:     my ($target,$token) = @_;
                   1042:     my $currentstring = '';
1.325     albertel 1043:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1044: 	$currentstring .= $token->[2];
                   1045:     } elsif ($target eq 'tex') {
1.179     sakharuk 1046: 	$currentstring .= '}';
1.144     sakharuk 1047:     }
1.122     albertel 1048:     return $currentstring;
                   1049: }
                   1050: 
1.181     sakharuk 1051: #-- <tt> tag (end tag required)
1.122     albertel 1052: sub start_tt {
                   1053:     my ($target,$token) = @_;
                   1054:     my $currentstring = '';
1.325     albertel 1055:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1056: 	$currentstring .= $token->[4];
                   1057:     } elsif ($target eq 'tex') {
                   1058: 	$currentstring .= '\texttt{';
1.144     sakharuk 1059:     }
1.122     albertel 1060:     return $currentstring;
                   1061: }
                   1062: 
                   1063: sub end_tt {
                   1064:     my ($target,$token) = @_;
                   1065:     my $currentstring = '';
1.325     albertel 1066:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1067: 	$currentstring .= $token->[2];
                   1068:     } elsif ($target eq 'tex') {
                   1069: 	$currentstring .= '}';
                   1070:     }
                   1071:     return $currentstring;
                   1072: }
                   1073: 
1.181     sakharuk 1074: #-- <kbd> tag (end tag required)
1.122     albertel 1075: sub start_kbd {
                   1076:     my ($target,$token) = @_;
                   1077:     my $currentstring = '';
1.325     albertel 1078:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1079: 	$currentstring .= $token->[4];
                   1080:     } elsif ($target eq 'tex') {
1.179     sakharuk 1081: 	$currentstring .= '\texttt{';
1.144     sakharuk 1082:     }
1.122     albertel 1083:     return $currentstring;
                   1084: }
                   1085: 
                   1086: sub end_kbd {
                   1087:     my ($target,$token) = @_;
                   1088:     my $currentstring = '';
1.325     albertel 1089:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1090: 	$currentstring .= $token->[2];
                   1091:     } elsif ($target eq 'tex') {
1.179     sakharuk 1092: 	$currentstring .= '}';
1.144     sakharuk 1093:     }
1.122     albertel 1094:     return $currentstring;
                   1095: }
                   1096: 
1.181     sakharuk 1097: #-- <code> tag (end tag required)
1.122     albertel 1098: sub start_code {
                   1099:     my ($target,$token) = @_;
                   1100:     my $currentstring = '';
1.325     albertel 1101:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1102: 	$currentstring .= $token->[4];
                   1103:     } elsif ($target eq 'tex') {
                   1104: 	$currentstring .= '\texttt{';
                   1105:     } 
                   1106:     return $currentstring;
                   1107: }
                   1108: 
                   1109: sub end_code {
                   1110:     my ($target,$token) = @_;
                   1111:     my $currentstring = '';
1.325     albertel 1112:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1113: 	$currentstring .= $token->[2];
                   1114:     } elsif ($target eq 'tex') {
                   1115: 	$currentstring .= '}';
                   1116:     } 
                   1117:     return $currentstring;
                   1118: }
                   1119: 
1.181     sakharuk 1120: #-- <em> tag (end tag required)
1.122     albertel 1121: sub start_em {
                   1122:     my ($target,$token) = @_;
                   1123:     my $currentstring = '';
1.325     albertel 1124:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1125: 	$currentstring .= $token->[4];
                   1126:     } elsif ($target eq 'tex') {
                   1127: 	$currentstring .= '\emph{';
1.144     sakharuk 1128:     }
1.122     albertel 1129:     return $currentstring;
                   1130: }
                   1131: 
                   1132: sub end_em {
                   1133:     my ($target,$token) = @_;
                   1134:     my $currentstring = '';
1.325     albertel 1135:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1136: 	$currentstring .= $token->[2];
                   1137:     } elsif ($target eq 'tex') {
                   1138: 	$currentstring .= '}';
1.144     sakharuk 1139:     } 
1.122     albertel 1140:     return $currentstring;
                   1141: }
                   1142: 
1.181     sakharuk 1143: #-- <q> tag (end tag required)
1.122     albertel 1144: sub start_q {
                   1145:     my ($target,$token) = @_;
                   1146:     my $currentstring = '';
1.325     albertel 1147:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1148: 	$currentstring .= $token->[4];
                   1149:     } elsif ($target eq 'tex') {
1.179     sakharuk 1150: 	$currentstring .= '\emph{';
1.122     albertel 1151:     }
                   1152:     return $currentstring;
                   1153: }
                   1154: 
                   1155: sub end_q {
                   1156:     my ($target,$token) = @_;
                   1157:     my $currentstring = '';
1.325     albertel 1158:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1159: 	$currentstring .= $token->[2];
                   1160:     } elsif ($target eq 'tex') {
1.179     sakharuk 1161: 	$currentstring .= '}';
1.144     sakharuk 1162:     } 
1.122     albertel 1163:     return $currentstring;
                   1164: }
                   1165: 
1.277     foxr     1166: #  <p> is a bit strange since it does not require a closing </p>
                   1167: #  However in latex, we must often output closing stuff to end
                   1168: #  environments and {}'s etc.  Therefore we do all the work
                   1169: #  of figuring out the ending strings in the start tag processing,
                   1170: #  and provide a mechanism to output the stop text external
                   1171: #  to tag processing.
                   1172: #
                   1173: {
                   1174: 
                   1175:     my $closing_string = '';		# String required to close <p>
                   1176: 
1.279     foxr     1177: #   Some tags are <p> fragile meaning that <p> inside of them
                   1178: #   does not work within TeX mode.  This is managed via the 
                   1179: #   counter below:
                   1180: #
                   1181: 
                   1182:     my $para_disabled = 0;
                   1183: 
                   1184: sub disable_para {
                   1185:     $para_disabled++;
                   1186: }
                   1187: sub enable_para {
                   1188:     $para_disabled--;
                   1189: }
                   1190: 
                   1191: 
1.181     sakharuk 1192: #-- <p> tag (end tag optional)
1.198     sakharuk 1193: #optional attribute - align="center|left|right"
1.122     albertel 1194: sub start_p {
1.157     sakharuk 1195:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1196:     my $currentstring = '';
1.325     albertel 1197:     if ($target eq 'web' || $target eq 'webgrade') {
1.279     foxr     1198: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.122     albertel 1199: 	$currentstring .= $token->[4];
1.279     foxr     1200: 	if (! ($currentstring =~ /\//)) {
                   1201: 	    $closing_string = '</p>'; # Deal correctly with <p /> e.g.
                   1202: 	}
                   1203:     } elsif ($target eq 'tex' && !$para_disabled) {
1.313     foxr     1204: 
1.279     foxr     1205: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.198     sakharuk 1206: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1207: 	if ($align eq 'center') {
1.333     albertel 1208: 	    $currentstring .='\begin{center}\par ';
1.277     foxr     1209: 	    $closing_string = '\end{center}';
1.309     albertel 1210: 	    if (&is_inside_of($tagstack, "table")) {
                   1211: 		$currentstring = &center_correction().$currentstring;
                   1212: 	    }
1.198     sakharuk 1213: 	} elsif ($align eq 'right') {
1.323     foxr     1214: 	    $currentstring.="\n".'{\flushright ';
                   1215: #	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
                   1216: 	    $closing_string= "}\n";
1.198     sakharuk 1217: 	} elsif ($align eq 'left') {
1.323     foxr     1218: 	    $currentstring.= "\n".'{\flushleft ';
                   1219: #	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
                   1220: 	    $closing_string = "}\n";
1.216     matthew  1221: 	} else {
1.277     foxr     1222:             $currentstring.='\par ';
1.313     foxr     1223: 	    if (&is_inside_of($tagstack, 'table')) {
1.315     foxr     1224: 		$closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1.313     foxr     1225: 	    } else {
                   1226: 		$closing_string = '\strut\\\\\strut ';
                   1227: 	    }
1.216     matthew  1228:         }
1.277     foxr     1229: 
1.144     sakharuk 1230:     }
1.122     albertel 1231:     return $currentstring;
                   1232: }
1.277     foxr     1233: #
                   1234: #  End paragraph processing just requires that we output the
                   1235: #  closing string that was saved and blank it.
                   1236: sub end_p {
1.279     foxr     1237:     #  Note only 'tex' mode uses disable_para and enable_para
                   1238:     #  so we don't need to know the target in the check below:
                   1239: 
                   1240:     if (!$para_disabled) {
                   1241: 	my $current_string = $closing_string;
                   1242: 	$closing_string = '';	# Not in a para anymore.
                   1243: 	return $current_string;
                   1244:     } else {
                   1245: 	return '';
                   1246:     }
1.122     albertel 1247: 
                   1248: }
1.277     foxr     1249: }
1.181     sakharuk 1250: #-- <br> tag (end tag forbidden)
1.122     albertel 1251: sub start_br {
                   1252:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1253:     my $currentstring = '';
1.325     albertel 1254:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1255: 	$currentstring .= $token->[4];
                   1256:     } elsif ($target eq 'tex') {
1.227     sakharuk 1257: 	my @tempo=@$tagstack;
1.229     sakharuk 1258: 	my $signal=0;
1.287     foxr     1259: 	#  Not going to factor this to is_inside_of since that would require
                   1260:         #  multiple stack traversals.
                   1261: 	#
1.227     sakharuk 1262: 	for (my $i=$#tempo;$i>=0;$i--) {
                   1263: 	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1.334     albertel 1264:                 ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul'))  {
1.229     sakharuk 1265: 		$signal=1;
1.334     albertel 1266: 	    }
                   1267: 	    if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1.336     foxr     1268: 		$signal = 1;
1.227     sakharuk 1269: 	    }
                   1270: 	}
1.375   ! foxr     1271: 	if ($signal != 1) {
1.219     sakharuk 1272: 	    $currentstring .= '\strut \\\\ \strut ';
1.1       sakharuk 1273: 	}
1.355     foxr     1274:     
1.144     sakharuk 1275:     }
1.122     albertel 1276:     return $currentstring;
                   1277: }
                   1278: 
                   1279: sub end_br {
                   1280:     my ($target,$token) = @_;
                   1281:     my $currentstring = '';
1.325     albertel 1282:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1283: 	$currentstring .= $token->[2];
                   1284:     }
                   1285:     return $currentstring;
                   1286: }
                   1287: 
1.181     sakharuk 1288: #-- <big> tag (end tag required)
1.122     albertel 1289: sub start_big {
                   1290:     my ($target,$token) = @_;
                   1291:     my $currentstring = '';
1.325     albertel 1292:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1293: 	$currentstring .= $token->[4];
                   1294:     } elsif ($target eq 'tex') {
1.137     sakharuk 1295: 	$currentstring .= '{\large ';
1.144     sakharuk 1296:     } 
1.122     albertel 1297:     return $currentstring;
                   1298: }
                   1299: 
                   1300: sub end_big {
                   1301:     my ($target,$token) = @_;
                   1302:     my $currentstring = '';
1.325     albertel 1303:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1304: 	$currentstring .= $token->[2];
                   1305:     } elsif ($target eq 'tex') {
                   1306: 	$currentstring .= '}';
                   1307:     }
                   1308:     return $currentstring;
                   1309: }
                   1310: 
1.181     sakharuk 1311: #-- <small> tag (end tag required)
1.122     albertel 1312: sub start_small {
                   1313:     my ($target,$token) = @_;
                   1314:     my $currentstring = '';
1.325     albertel 1315:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1316: 	$currentstring .= $token->[4];
                   1317:     } elsif ($target eq 'tex') {
                   1318: 	$currentstring .= '{\footnotesize ';
1.144     sakharuk 1319:     }
1.122     albertel 1320:     return $currentstring;
                   1321: }
                   1322: 
                   1323: sub end_small {
                   1324:     my ($target,$token) = @_;
                   1325:     my $currentstring = '';
1.325     albertel 1326:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1327: 	$currentstring .= $token->[2];
                   1328:     } elsif ($target eq 'tex') {
                   1329: 	$currentstring .= '}';
                   1330:     }
                   1331:     return $currentstring;
                   1332: }
                   1333: 
1.181     sakharuk 1334: #-- <basefont> tag (end tag forbidden)
1.122     albertel 1335: sub start_basefont {
1.126     sakharuk 1336:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.122     albertel 1337:     my $currentstring = '';
1.325     albertel 1338:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1339: 	$currentstring = $token->[4];     
1.126     sakharuk 1340:     } elsif ($target eq 'tex') {
                   1341: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1342: 	if (defined $basesize) {
                   1343: 	    $currentstring = '{\\'.$basesize.' ';
                   1344: 	}
                   1345:     }
1.122     albertel 1346:     return $currentstring;
                   1347: }
                   1348: 
                   1349: sub end_basefont {
1.126     sakharuk 1350:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1351:     my $currentstring = '';
1.325     albertel 1352:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1353: 	$currentstring = $token->[4];     
1.126     sakharuk 1354:     } elsif ($target eq 'tex') {
                   1355: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1356: 	if (defined $basesize) {
                   1357: 	    $currentstring = '}';
                   1358: 	}
                   1359:     }
1.122     albertel 1360:     return $currentstring;
                   1361: }
                   1362: 
1.181     sakharuk 1363: #-- <font> tag (end tag required)
1.122     albertel 1364: sub start_font {
                   1365:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1366:     my $currentstring = '';
1.325     albertel 1367:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1368: 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1.204     albertel 1369: 	if ($face!~/symbol/i) {
1.267     albertel 1370: 	    if (($env{'browser.fontenhance'} eq 'on') || 
                   1371: 		($env{'browser.blackwhite'} eq 'on')) { return ''; }
1.155     www      1372: 	}
1.122     albertel 1373: 	$currentstring = $token->[4];     
1.126     sakharuk 1374:     }  elsif ($target eq 'tex') {
                   1375: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1376: 	if (defined $fontsize) {
                   1377: 	    $currentstring = '{\\'.$fontsize.' ';
                   1378: 	}
                   1379:     }
1.122     albertel 1380:     return $currentstring;
                   1381: }
                   1382: 
                   1383: sub end_font {
                   1384:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1385:     my $currentstring = '';
1.325     albertel 1386:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1387: 	$currentstring = $token->[2];    
1.126     sakharuk 1388:     }  elsif ($target eq 'tex') {
                   1389: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1390: 	if (defined $fontsize) {
                   1391: 	    $currentstring = '}';
                   1392: 	}
                   1393:     }
1.122     albertel 1394:     return $currentstring;
                   1395: }
                   1396:  
1.181     sakharuk 1397: #-- <strike> tag (end tag required)
1.122     albertel 1398: sub start_strike {
                   1399:     my ($target,$token) = @_;
                   1400:     my $currentstring = '';
1.325     albertel 1401:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1402: 	$currentstring .= $token->[4];
                   1403:     } elsif ($target eq 'tex') {
                   1404: 	&Apache::lonxml::startredirection();
                   1405:     } 
                   1406:     return $currentstring;
                   1407: }
                   1408: 
                   1409: sub end_strike {
                   1410:     my ($target,$token) = @_;
                   1411:     my $currentstring = '';
1.325     albertel 1412:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1413: 	$currentstring .= $token->[2];
                   1414:     } elsif ($target eq 'tex') {
                   1415: 	$currentstring=&Apache::lonxml::endredirection();
                   1416: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 
                   1417: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/; 
                   1418: 	$currentstring=~s/(\S)\s*$/$1\}/;
                   1419:     }
                   1420:     return $currentstring;
                   1421: }
                   1422: 
1.181     sakharuk 1423: #-- <s> tag (end tag required)
1.122     albertel 1424: sub start_s {
                   1425:     my ($target,$token) = @_;
                   1426:     my $currentstring = '';
1.325     albertel 1427:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1428: 	$currentstring .= $token->[4];
                   1429:     } elsif ($target eq 'tex') {
                   1430: 	&Apache::lonxml::startredirection();
                   1431:     } 
                   1432:     return $currentstring;
                   1433: }
                   1434: 
                   1435: sub end_s {
                   1436:     my ($target,$token) = @_;
                   1437:     my $currentstring = '';
1.325     albertel 1438:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1439: 	$currentstring .= $token->[2];
                   1440:     } elsif ($target eq 'tex') {
                   1441: 	$currentstring=&Apache::lonxml::endredirection();
                   1442: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1443: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1444: 	$currentstring=~s/(\S)\s*$/$1\}/;	
                   1445:     }
                   1446:     return $currentstring;
                   1447: }
                   1448: 
1.181     sakharuk 1449: #-- <sub> tag (end tag required)
1.122     albertel 1450: sub start_sub {
                   1451:     my ($target,$token) = @_;
                   1452:     my $currentstring = '';
1.325     albertel 1453:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1454: 	$currentstring .= $token->[4];
                   1455:     } elsif ($target eq 'tex') {
1.355     foxr     1456: 	$currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1.122     albertel 1457:     } 
                   1458:     return $currentstring;
                   1459: }
                   1460: 
                   1461: sub end_sub {
                   1462:     my ($target,$token) = @_;
                   1463:     my $currentstring = '';
1.325     albertel 1464:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1465: 	$currentstring .= $token->[2];
                   1466:     } elsif ($target eq 'tex') {
1.202     sakharuk 1467: 	$currentstring .= '}}';
1.122     albertel 1468:     }
                   1469:     return $currentstring;
                   1470: }
                   1471: 
1.181     sakharuk 1472: #-- <sup> tag (end tag required)
1.122     albertel 1473: sub start_sup {
                   1474:     my ($target,$token) = @_;
                   1475:     my $currentstring = '';
1.325     albertel 1476:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1477: 	$currentstring .= $token->[4];
                   1478:     } elsif ($target eq 'tex') {
1.355     foxr     1479: 	$currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1.122     albertel 1480:     } 
                   1481:     return $currentstring;
                   1482: }
                   1483: 
                   1484: sub end_sup {
                   1485:     my ($target,$token) = @_;
                   1486:     my $currentstring = '';
1.325     albertel 1487:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1488: 	$currentstring .= $token->[2];
                   1489:     } elsif ($target eq 'tex') {
1.202     sakharuk 1490: 	$currentstring .= '}}';
1.122     albertel 1491:     }
                   1492:     return $currentstring;
                   1493: }
                   1494: 
1.181     sakharuk 1495: #-- <hr> tag (end tag forbidden)
1.122     albertel 1496: sub start_hr {
1.124     sakharuk 1497:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1498:     my $currentstring = &end_p();	# End enclosing para.
1.325     albertel 1499:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1500: 	$currentstring .= $token->[4];
                   1501:     } elsif ($target eq 'tex') {
1.361     foxr     1502: 
                   1503: 	# <hr /> can't be inside of <sup><sub> thank you LaTeX.
                   1504: 	# 
                   1505: 	my $restart_sub = 0;
                   1506: 	my $restart_sup = 0;
                   1507: 
                   1508: 	# Since <sub> and <sup> are simple tags it's ok to turn off/on
                   1509: 	# using the start_ stop_ functions.. those tags only care about
                   1510: 	# $target.
                   1511: 
                   1512: 	if (&is_inside_of($tagstack, "sub")) {
                   1513: 	    $restart_sub = 1;
                   1514: 	    $currentstring .= &end_sub($target, $token, $tagstack, 
                   1515: 				       $parstack, $parser, $safeeval);
                   1516: 	}
                   1517: 	if (&is_inside_of($tagstack, "sup")) {
                   1518: 	    $restart_sup = 1;
                   1519: 	    $currentstring .= &end_sup($target, $token, $tagstack,
                   1520: 				       $parstack, $parser, $safeeval);
                   1521: 	}	
                   1522: 
1.149     sakharuk 1523: 	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.124     sakharuk 1524: 	if (defined $LaTeXwidth) {
                   1525: 	    if ($LaTeXwidth=~/^%/) {
                   1526: 		substr($LaTeXwidth,0,1)='';
                   1527: 		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
                   1528: 	    }
                   1529: 	} else {
1.148     sakharuk 1530: 	    $LaTeXwidth ='0.9\textwidth';
1.124     sakharuk 1531: 	}
                   1532: 	my ($pre,$post);
                   1533: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1534: 	if (($align eq 'center') || (not defined $align)) {
                   1535: 	    $pre=''; $post='';
                   1536: 	} elsif ($align eq 'left') {
                   1537: 	    $pre='\rlap{'; $post='} \hfill';
                   1538: 	} elsif ($align eq 'right') {
                   1539: 	    $pre=' \hfill \llap{'; $post='}';
                   1540: 	}
1.148     sakharuk 1541: 	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1.124     sakharuk 1542:                                     $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1.361     foxr     1543: 	# Turn stuff back on that we can't be inside of.
                   1544: 
                   1545: 	if ($restart_sub) {
                   1546: 	    $currentstring .= &start_sub($target, $token, $tagstack,
                   1547: 					$parstack, $parser, $safeeval);
                   1548: 	}
                   1549: 	if ($restart_sup) {
                   1550: 	    $currentstring .= &start_sup($target, $token, $tagstack,
                   1551: 					 $parstack, $parser, $safeeval);
                   1552: 	}	
1.122     albertel 1553:     } 
                   1554:     return $currentstring;
                   1555: }
                   1556: 
                   1557: sub end_hr {
                   1558:     my ($target,$token) = @_;
                   1559:     my $currentstring = '';
1.325     albertel 1560:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1561: 	$currentstring .= $token->[2];
1.148     sakharuk 1562:     }
1.122     albertel 1563:     return $currentstring;
                   1564: }
                   1565: 
1.181     sakharuk 1566: #-- <div> tag (end tag required)
1.280     foxr     1567: {
                   1568: 
                   1569: #  Since div can be nested, the stack below is used
                   1570: #  in 'tex' mode to store the ending strings
                   1571: #  for the div stack.
                   1572: 
                   1573:     my @div_end_stack;
                   1574: 
1.122     albertel 1575: sub start_div {
1.280     foxr     1576:     my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1.279     foxr     1577:     my $currentstring = &end_p();	# Close enclosing para.
1.325     albertel 1578:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1579: 	$currentstring .= $token->[4];
                   1580:     } 
1.280     foxr     1581:     if ($target eq 'tex') {
                   1582: 	# 4 possible alignments: left, right, center, and -missing-.
                   1583: 
                   1584: 	my $endstring = '';
                   1585: 
                   1586: 	my $align = lc(&Apache::lonxml::get_param('align', $parstack,
                   1587: 						  $safeeval, undef, 1));
                   1588: 	if ($align eq 'center') {
                   1589: 	    $currentstring .= '\begin{center}';
                   1590: 	    $endstring      = '\end{center}';
1.309     albertel 1591: 	    if (&is_inside_of($tagstack, "table")) {
                   1592: 		$currentstring = &center_correction().$currentstring;
                   1593: 	    }
1.280     foxr     1594: 	}
                   1595: 	elsif ($align eq 'right') {
                   1596: 	    $currentstring .= '\begin{flushright}';
                   1597: 	    $endstring     .= '\end{flushright}';
                   1598: 	} elsif ($align eq 'left') {
                   1599: 	    $currentstring .= '\begin{flushleft}';
                   1600: 	    $endstring     = '\end{flushleft}';
                   1601: 	} else {
                   1602: 	
                   1603: 	}
                   1604: 	$currentstring .= "\n";   # For human readability.
                   1605: 	$endstring       = "\n$endstring\n"; # For human readability
                   1606: 	push(@div_end_stack, $endstring);
                   1607:     }
1.122     albertel 1608:     return $currentstring;
                   1609: }
                   1610: 
                   1611: sub end_div {
                   1612:     my ($target,$token) = @_;
                   1613:     my $currentstring = '';
1.325     albertel 1614:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1615: 	$currentstring .= $token->[2];
1.280     foxr     1616:     }
                   1617:     if ($target eq 'tex') {
                   1618: 	my $endstring = pop @div_end_stack;
                   1619: 	$currentstring .= $endstring;
                   1620:     }
1.122     albertel 1621:     return $currentstring;
                   1622: }
1.280     foxr     1623: }
1.122     albertel 1624: 
1.181     sakharuk 1625: #-- <a> tag (end tag required)
1.122     albertel 1626: sub start_a {
1.149     sakharuk 1627:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1628:     my $currentstring = '';
1.325     albertel 1629:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 1630: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   1631: 					    undef,1);
                   1632: 	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1.122     albertel 1633:     }
                   1634:     return $currentstring;
                   1635: }
                   1636: 
                   1637: sub end_a {
1.168     albertel 1638:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1639:     my $currentstring = '';
1.325     albertel 1640:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1641: 	$currentstring .= $token->[2];
                   1642:     }
1.351     foxr     1643:     if ($target eq 'tex') {
1.352     albertel 1644: 	my $href =
                   1645: 	    &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
                   1646: 	my $name =
                   1647: 	    &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
                   1648: 	if ($href =~ /\S/) {
                   1649: 	    $href =~ s/([^\\])%/$1\\\%/g;
1.365     foxr     1650: 	    # Substitute special symbols... and allow line breaks at each /
                   1651: 	    #
                   1652: 	    $href = &Apache::lonxml::latex_special_symbols($href);
                   1653: 	    $href =~ s/\//\/\\-/g;              # Map / to /\- to allow hyphenation.
                   1654: 	    $currentstring .= ' ({\tt URI:'.$href.'})';
1.352     albertel 1655: 	} elsif ($name =~ /\S/) {
                   1656: 	    $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1.351     foxr     1657: 	} else {
                   1658: 	    $currentstring.='';
                   1659: 	}	
                   1660:     }
1.122     albertel 1661:     return $currentstring;
                   1662: }
                   1663: 
1.181     sakharuk 1664: #-- <li> tag (end tag optional)
1.122     albertel 1665: sub start_li {
1.168     albertel 1666:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1667:     my $currentstring = '';
1.325     albertel 1668:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1669: 	$currentstring = $token->[4];     
                   1670:     } elsif ($target eq 'tex') {
1.237     sakharuk 1671: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1672: 	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1.238     albertel 1673: 	#FIXME need to support types i and I 
                   1674: 	if ($type=~/disc/) {
                   1675: 	    $currentstring .= ' \item[$\bullet$] ';
                   1676: 	} elsif ($type=~/circle/) {
                   1677: 	    $currentstring .= ' \item[$\circ$] ';
1.146     sakharuk 1678: 	} elsif ($type=~/square/) {
1.238     albertel 1679: 	    $currentstring .= ' \item[$\diamond$] ';
                   1680: 	} elsif ($type eq '1') {
                   1681: 	    $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1.237     sakharuk 1682: 	} elsif ($type eq 'A') {
1.238     albertel 1683: 	    $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1684: 	} elsif ($type eq 'a') {
1.238     albertel 1685: 	    $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1686: 	} elsif ($value ne '') {
                   1687: 	    $currentstring .= ' \item['.$value.'] ';
1.122     albertel 1688: 	} else {
1.146     sakharuk 1689: 	    $currentstring .= ' \item ';
1.122     albertel 1690: 	}  
1.238     albertel 1691: 	$Apache::londefdef::list_index++;
                   1692:     }
1.122     albertel 1693:     return $currentstring;
                   1694: }
                   1695: 
                   1696: sub end_li {
                   1697:     my ($target,$token) = @_;
1.279     foxr     1698:     my $currentstring = &end_p();	# In case there's a <p> in the <li>
1.325     albertel 1699:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1700: 	$currentstring .= $token->[2];     
1.122     albertel 1701:     } 
                   1702:     return $currentstring;
                   1703: }
                   1704: 
1.181     sakharuk 1705: #-- <u> tag (end tag required)
1.122     albertel 1706: sub start_u {
                   1707:     my ($target,$token) = @_;
                   1708:     my $currentstring = '';
1.325     albertel 1709:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1710: 	$currentstring .= $token->[4];
                   1711:     } elsif ($target eq 'tex') {
                   1712: 	&Apache::lonxml::startredirection();
                   1713:     } 
                   1714:     return $currentstring;
                   1715: }
                   1716: 
                   1717: sub end_u {
                   1718:     my ($target,$token) = @_;
                   1719:     my $currentstring = '';
1.325     albertel 1720:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1721: 	$currentstring .= $token->[2];
                   1722:     } elsif ($target eq 'tex') {
                   1723: 	$currentstring=&Apache::lonxml::endredirection();
                   1724: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1725: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1726: 	$currentstring=~s/(\S)\s*$/$1\}/;		
                   1727:     }
                   1728:     return $currentstring;
                   1729: }
                   1730: 
1.181     sakharuk 1731: #-- <ul> tag (end tag required)
1.122     albertel 1732: sub start_ul {
1.125     sakharuk 1733:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1734:     my $currentstring = &end_p();	# Close off enclosing list.
1.325     albertel 1735:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1736: 	$currentstring .= $token->[4];     
1.122     albertel 1737:     } elsif ($target eq 'tex') {
1.125     sakharuk 1738: 	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1.238     albertel 1739: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1740: 	if ($TeXtype eq 'disc') {
1.222     sakharuk 1741: 	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                   1742:                               '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1743:                               '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1744:                               '\renewcommand{\labelitemiv}{$\bullet$}';
1.125     sakharuk 1745: 	} elsif ($TeXtype eq 'circle') {
1.222     sakharuk 1746: 	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                   1747:                               '\renewcommand{\labelitemii}{$\circ$}'. 
                   1748:                               '\renewcommand{\labelitemiii}{$\circ$}'.
                   1749:                               '\renewcommand{\labelitemiv}{$\circ$}';
1.125     sakharuk 1750: 	} elsif ($TeXtype eq 'square') {
1.222     sakharuk 1751: 	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                   1752:                               '\renewcommand{\labelitemii}{$\diamond$}'. 
                   1753:                               '\renewcommand{\labelitemiii}{$\diamond$}'.
                   1754:                               '\renewcommand{\labelitemiv}{$\diamond$}';
1.125     sakharuk 1755: 	}
1.222     sakharuk 1756: 	$currentstring .= '\strut \begin{itemize}';  
1.122     albertel 1757:     } 
                   1758:     return $currentstring;
                   1759: }
                   1760: 
                   1761: sub end_ul {
                   1762:     my ($target,$token) = @_;
                   1763:     my $currentstring = '';
1.325     albertel 1764:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1765: 	$currentstring = $token->[2];     
                   1766:     } elsif ($target eq 'tex') {
1.222     sakharuk 1767: 	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                   1768:                                '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1769:                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1770:                                '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
1.122     albertel 1771:     } 
                   1772:     return $currentstring;
                   1773: }
                   1774: 
1.181     sakharuk 1775: #-- <menu> tag (end tag required)
1.122     albertel 1776: sub start_menu {
                   1777:     my ($target,$token) = @_;
                   1778:     my $currentstring = '';
1.325     albertel 1779:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1780: 	$currentstring = $token->[4];     
                   1781:     } elsif ($target eq 'tex') {
                   1782: 	$currentstring = " \\begin{itemize} ";  
                   1783:     } 
                   1784:     return $currentstring;
                   1785: }
                   1786: 
                   1787: sub end_menu {
                   1788:     my ($target,$token) = @_;
                   1789:     my $currentstring = '';
1.325     albertel 1790:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1791: 	$currentstring = $token->[2];     
                   1792:     } elsif ($target eq 'tex') {
                   1793: 	$currentstring = " \\end{itemize}";  
                   1794:     } 
                   1795:     return $currentstring;
                   1796: }
                   1797: 
1.181     sakharuk 1798: #-- <dir> tag (end tag required)
1.122     albertel 1799: sub start_dir {
                   1800:     my ($target,$token) = @_;
1.279     foxr     1801:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.325     albertel 1802:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1803: 	$currentstring .= $token->[4];     
1.122     albertel 1804:     } elsif ($target eq 'tex') {
1.277     foxr     1805: 	$currentstring .= " \\begin{itemize} ";  
1.122     albertel 1806:     } 
                   1807:     return $currentstring;
                   1808: }
                   1809: 
                   1810: sub end_dir {
                   1811:     my ($target,$token) = @_;
                   1812:     my $currentstring = '';
1.325     albertel 1813:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1814: 	$currentstring = $token->[2];     
                   1815:     } elsif ($target eq 'tex') {
                   1816: 	$currentstring = " \\end{itemize}";  
                   1817:     } 
                   1818:     return $currentstring;
                   1819: }
                   1820: 
1.181     sakharuk 1821: #-- <ol> tag (end tag required)
1.122     albertel 1822: sub start_ol {
1.125     sakharuk 1823:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1824:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.325     albertel 1825:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1826: 	$currentstring .= $token->[4];     
1.122     albertel 1827:     } elsif ($target eq 'tex') {
1.238     albertel 1828: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1829: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1830: 	if ($type eq '1') {
1.222     sakharuk 1831: 	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1832:                               '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                   1833:                               '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1834:                               '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1.125     sakharuk 1835: 	} elsif ($type eq 'A') {
1.222     sakharuk 1836: 	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                   1837:                               '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                   1838:                               '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                   1839:                               '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1.125     sakharuk 1840: 	} elsif ($type eq 'a') {
1.222     sakharuk 1841: 	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                   1842:                               '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                   1843:                               '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                   1844:                               '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1.125     sakharuk 1845: 	} elsif ($type eq 'i') {
1.222     sakharuk 1846: 	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                   1847:                               '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                   1848:                               '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                   1849:                               '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1.125     sakharuk 1850: 	} elsif ($type eq 'I') {
1.222     sakharuk 1851: 	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                   1852:                               '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                   1853:                               '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                   1854:                               '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1.125     sakharuk 1855: 	}
1.222     sakharuk 1856: 	$currentstring .= '\strut \begin{enumerate}';  
1.122     albertel 1857:     } 
                   1858:     return $currentstring;
                   1859: }
                   1860: 
                   1861: sub end_ol {
                   1862:     my ($target,$token) = @_;
                   1863:     my $currentstring = '';
1.325     albertel 1864:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1865: 	$currentstring = $token->[2];     
                   1866:     } elsif ($target eq 'tex') {
1.222     sakharuk 1867: 	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1868:                                         '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                   1869:                                         '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1870:                                         '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
1.122     albertel 1871:     } 
                   1872:     return $currentstring;
                   1873: }
                   1874: 
1.181     sakharuk 1875: #-- <dl> tag (end tag required)
1.122     albertel 1876: sub start_dl {
                   1877:     my ($target,$token) = @_;
1.279     foxr     1878:     my $currentstring = &end_p();	# In case there's a <p> unclosed prior to the list.
1.325     albertel 1879:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1880: 	$currentstring .= $token->[4];     
1.122     albertel 1881:     } elsif ($target eq 'tex') {
1.277     foxr     1882: 	$currentstring .= '\begin{description}';
1.243     albertel 1883: 	$Apache::londefdef::DL++;
                   1884: 	push(@Apache::londefdef::description,[]);
                   1885: 	$Apache::londefdef::DD[$Apache::londefdef::DL]=0;
                   1886: 	$Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1.244     albertel 1887: 	$Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1.122     albertel 1888:     } 
                   1889:     return $currentstring;
                   1890: }
                   1891: 
                   1892: sub end_dl {
1.174     sakharuk 1893:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1894:     my $currentstring = '';
1.325     albertel 1895:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1896: 	$currentstring = $token->[2];     
                   1897:     } elsif ($target eq 'tex') {
1.243     albertel 1898: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1899: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
                   1900: 	foreach my $element (@{$Apache::londefdef::description[-1]}) {
1.174     sakharuk 1901: 	    $currentstring.=' '.$element.' ';
                   1902: 	}
1.243     albertel 1903: 	pop(@Apache::londefdef::description);
1.174     sakharuk 1904: 	$currentstring.='\end{description}';  
1.243     albertel 1905: 	delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
                   1906: 	delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1.244     albertel 1907: 	delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1.243     albertel 1908: 	$Apache::londefdef::DL--;
1.122     albertel 1909:     } 
                   1910:     return $currentstring;
                   1911: }
                   1912: 
1.172     sakharuk 1913: #-- <dt> tag (end tag optional)
1.122     albertel 1914: sub start_dt {
1.172     sakharuk 1915:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1916:     my $currentstring='';
1.325     albertel 1917:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1918: 	$currentstring = $token->[4];     
                   1919:     } elsif ($target eq 'tex') {
1.243     albertel 1920: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1921: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1.174     sakharuk 1922: 	&Apache::lonxml::startredirection();
1.243     albertel 1923: 	$Apache::londefdef::DT[-1]++;
1.244     albertel 1924: 	$Apache::londefdef::seenDT[-1]=1;
1.122     albertel 1925:     } 
                   1926:     return $currentstring;
                   1927: }
                   1928: 
                   1929: sub end_dt {
1.172     sakharuk 1930:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1931:     my $currentstring = '';
1.325     albertel 1932:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1933: 	$currentstring = $token->[2];    
                   1934:     } elsif ($target eq 'tex') {
1.243     albertel 1935: 	if ($Apache::londefdef::DT[-1]) {
                   1936: 	    my $data=&item_cleanup();
1.244     albertel 1937: 	    push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1.243     albertel 1938: 	    $Apache::londefdef::DT[-1]--;
                   1939: 	}
1.122     albertel 1940:     } 
                   1941:     return $currentstring;
                   1942: }
                   1943: 
1.173     sakharuk 1944: sub item_cleanup {
1.174     sakharuk 1945:     my $item=&Apache::lonxml::endredirection();
1.173     sakharuk 1946:     $item=~s/\\begin{center}//g;
                   1947:     $item=~s/\\end{center}//g;
                   1948:     return $item;
                   1949: }
                   1950: 
1.181     sakharuk 1951: #-- <dd> tag (end tag optional)
1.122     albertel 1952: sub start_dd {
1.147     sakharuk 1953:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1954:     my $currentstring = '';
1.325     albertel 1955:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1956: 	$currentstring = $token->[4];     
1.147     sakharuk 1957:     } elsif ($target eq 'tex') {
1.243     albertel 1958: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1959: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1.244     albertel 1960: 	if (!$Apache::londefdef::seenDT[-1]) {
                   1961: 	    push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
                   1962: 	}
1.243     albertel 1963: 	push(@{$Apache::londefdef::description[-1]},'');
                   1964: 	$Apache::londefdef::description[-1]->[-1].=' \strut ';
                   1965: 	$Apache::londefdef::DD[-1]++;
1.174     sakharuk 1966: 	&Apache::lonxml::startredirection();
1.122     albertel 1967:     } 
                   1968:     return $currentstring;
                   1969: }
                   1970: 
                   1971: sub end_dd {
1.174     sakharuk 1972:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1973:     my $currentstring = '';
1.325     albertel 1974:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1975: 	$currentstring = $token->[2];    
1.174     sakharuk 1976:     }  elsif ($target eq 'tex') {
1.243     albertel 1977: 	$Apache::londefdef::description[-1]->[-1].=
                   1978: 	    &Apache::lonxml::endredirection().' \vskip 0mm ';
                   1979: 	$Apache::londefdef::DD[-1]--;
1.174     sakharuk 1980:     }
1.122     albertel 1981:     return $currentstring;
                   1982: }
                   1983: 
1.181     sakharuk 1984: #-- <table> tag (end tag required)
1.277     foxr     1985: #       <table> also ends any prior <p> that is not closed.
                   1986: #               but, unless I allow <p>'s to nest, that's the
                   1987: #               only way I could think of to allow <p> in 
                   1988: #               <tr> <th> bodies
                   1989: #
1.206     sakharuk 1990: #list of supported attributes: border,width,TeXwidth
1.91      sakharuk 1991: sub start_table {
                   1992:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.277     foxr     1993:     my $textwidth = '';
1.279     foxr     1994:     my $currentstring = &end_p();
1.325     albertel 1995:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1996: 	$currentstring .= $token->[4];     
1.91      sakharuk 1997:     } elsif ($target eq 'tex') {
1.344     albertel 1998: 	push(@Apache::londefdef::table, {}); 
1.91      sakharuk 1999: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 2000:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 2001: 	if ($#Apache::londefdef::table==0) {
1.267     albertel 2002: 	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1.206     sakharuk 2003: 	    $textwidth=~/(\d+\.?\d*)/;
1.358     foxr     2004: 	    $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
1.206     sakharuk 2005: 	} else {
                   2006: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   2007: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   2008: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   2009: 	    } else {
                   2010:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 2011: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 2012: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   2013: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   2014: 		}
                   2015: 	    }
                   2016: 	}
1.294     foxr     2017: 
                   2018: 	# width either comes forced from the TeXwidth or the width parameters.
                   2019: 	# in either case it can be a percentage or absolute width.
1.311     albertel 2020: 	# in the width case we ignore absolute width 
1.126     sakharuk 2021: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.308     albertel 2022: 	if (!defined($TeXwidth)) {
1.311     albertel 2023: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
                   2024: 						       $safeeval,undef,1);
                   2025: 	    if ($htmlwidth =~ /%/) {
                   2026: 		$TeXwidth = $htmlwidth;
                   2027: 	    } else { 
                   2028: 		$TeXwidth = $textwidth;
                   2029: 	    }
1.364     foxr     2030: 	}
                   2031: 	# if the width is specified as a % it is converted to an absolute width.
                   2032: 	# otherwise.. just plugged right in the hash
                   2033: 
1.294     foxr     2034: 	if ($TeXwidth=~/%/) {
1.126     sakharuk 2035: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 2036:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 2037: 	} else {
1.206     sakharuk 2038: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.316     foxr     2039: 	}
                   2040:         #  In the end, however the table width cannot be wider than $textwidth...
                   2041: 	
                   2042: 	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
                   2043: 	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
                   2044: 	}
1.126     sakharuk 2045:         #table's border
1.206     sakharuk 2046: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 2047:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 2048: 	unless (defined $border) { $border = 0; }
                   2049: 	if ($border) { 
                   2050: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   2051: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2052: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   2053: 	} else {
                   2054: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   2055: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2056: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   2057: 	}
1.206     sakharuk 2058: 	if ($#Apache::londefdef::table==0) {
1.281     foxr     2059: 	    #    Note that \newline seems to destroy the alignment envs.
                   2060: 	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
                   2061: 	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 2062: 	}
                   2063: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   2064:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   2065:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 2066:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 2067:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   2068:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   2069:         $Apache::londefdef::table[-1]{'content'}=[];
                   2070:         $Apache::londefdef::table[-1]{'align'}=[];
1.340     foxr     2071:         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
1.295     foxr     2072: 
1.294     foxr     2073: 
                   2074:     }
1.91      sakharuk 2075:     return $currentstring;
                   2076: }
1.122     albertel 2077:  
                   2078: sub end_table {
                   2079:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2080:     my $currentstring = '';
1.325     albertel 2081:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2082: 	$currentstring = $token->[2];     
                   2083:     } elsif ($target eq 'tex') {
1.372     foxr     2084: 	my $border =  &Apache::lonxml::get_param('border',$parstack,$safeeval);
1.122     albertel 2085: 	my $inmemory = '';
                   2086: 	my $output = '';
1.206     sakharuk 2087: 	my $WARNING='';
                   2088:         #width of columns from TeXwidth attributes
1.294     foxr     2089: 
1.206     sakharuk 2090: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2091: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2092: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   2093: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   2094: 		}	
                   2095: 	    }
                   2096: 	}
                   2097:         #free space and number of empty columns
                   2098: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 2099: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 2100: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2101: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   2102: 		$empty_columns++;
                   2103: 	    } else {
                   2104: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   2105: 	    }
                   2106: 	}
1.358     foxr     2107: 
1.206     sakharuk 2108:         #boundaries for contents columns
                   2109: 	my @min_len=();#columns can not be narrower 
                   2110: 	my @max_len=();#maximum length of column
1.357     foxr     2111: 	my $avg_max;
                   2112: 	my $avg_min;
                   2113: 	my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
                   2114: 	for (my $jn=0;$jn<=$counter_cols; $jn++) {
1.206     sakharuk 2115: 		my ($localmin,$localmax)=(0,0);
                   2116: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2117: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   2118: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   2119: 		    }
                   2120: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   2121: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   2122: 		    }
                   2123: 		}
                   2124: 		push @min_len, $localmin;
                   2125: 		push @max_len, $localmax;
1.357     foxr     2126: 		$avg_max = $localmax + $avg_max;
                   2127: 		$avg_min = $localmin + $avg_min;
                   2128: 	}
                   2129: 	# Does not really matter what the average max/min are if there are no cols.
                   2130: 	# and this prevents div 0 in that case.
                   2131: 
                   2132: 	if ($counter_cols != 0) {
                   2133: 	    $avg_max = $avg_max/$counter_cols;
                   2134: 	    $avg_min = $avg_min/$counter_cols;
                   2135: 	}
                   2136: 
                   2137: 
                   2138: 	#  I don't think the below is needed.. but just in case:
                   2139: 
                   2140: 	if ($avg_min > $avg_max) {
                   2141: 	    my $temp = $avg_min;
                   2142: 	    $avg_min = $avg_max;
                   2143: 	    $avg_max = $temp;
1.122     albertel 2144: 	}
1.357     foxr     2145: 
                   2146: 
                   2147: 	for (my $jn=0;$jn<=$counter_cols;$jn++) {
1.206     sakharuk 2148: 	    my $localmin=0,;
                   2149: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2150: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   2151: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   2152: 		}
                   2153: 	    }
1.229     sakharuk 2154: 	    if ($max_len[$jn]<$localmin) {
                   2155: 		$max_len[$jn]=$localmin;
                   2156: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2157: 	    }#object size is bigger
                   2158: 	    if ($min_len[$jn]<$localmin) {
                   2159: 		$min_len[$jn]=$localmin;
                   2160: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2161: 	    }#object size is bigger
1.206     sakharuk 2162: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   2163: 		$min_len[$jn]=0;
                   2164: 		$max_len[$jn]=0;
                   2165: 	    }
1.357     foxr     2166: 	    #  Spans seem to be really bothered by max/min = 0.  So if we have one
                   2167: 	    #  make it an average joe max/min.
                   2168: 	    
                   2169: 	    if ($max_len[$jn] == 0) {
                   2170: 		$max_len[$jn] = $avg_max;
                   2171: 	    }
                   2172: 	    if ($min_len[$jn] == 0) {
                   2173: 		$min_len[$jn] = $avg_min;
                   2174: 	    }
                   2175: 
1.206     sakharuk 2176: 	}
                   2177:        #final adjustment of column width
                   2178: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   2179: 	my @adjust=();
                   2180:         #step 1. adjustment by maximum value
1.370     albertel 2181: 	my $space_needed=0;
1.206     sakharuk 2182: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
1.370     albertel 2183: 	    $space_needed=$space_needed+$max_len[$jn];
1.206     sakharuk 2184: 	}
1.370     albertel 2185: 	if ($space_needed<=$available_space) {
1.362     foxr     2186: 
1.206     sakharuk 2187: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2188: 		if ($fwidth[$jn]==0) {
                   2189: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 2190: 		}
1.51      sakharuk 2191: 	    }
1.206     sakharuk 2192: 	} else {
                   2193:         #step 2. adjustment by minimum value (estimation)
1.370     albertel 2194: 	    $space_needed=0;
1.206     sakharuk 2195: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
1.370     albertel 2196: 		$space_needed+=$min_len[$jn];
1.206     sakharuk 2197: 	    }
1.370     albertel 2198: 	    if ($space_needed>$available_space) {
1.206     sakharuk 2199: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   2200: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2201: 		    if ($fwidth[$jn]==0) {
                   2202: 			$fwidth[$jn]=$min_len[$jn];
                   2203: 		    }
                   2204: 		}
1.229     sakharuk 2205: 		#check if we have objects which can be scaled
                   2206: 		my $how_many_to_scale=0;
                   2207: 		my @to_scale=();
                   2208: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2209: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   2210: 			$how_many_to_scale++;
                   2211: 			push @to_scale, $jn;
                   2212: 		    }
                   2213: 		}
                   2214: 		if ($how_many_to_scale>0) {
1.370     albertel 2215: 		    my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
1.229     sakharuk 2216: 		    foreach my $jn (@to_scale) {
                   2217: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2218: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   2219: 			    if ($1 ne '') {
                   2220: 				my $current_length=&recalc($1);
                   2221: 				$current_length=~/(\d+\.?\d*)/;
                   2222: 				$current_length=$current_length-$space_to_adjust;
                   2223: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   2224: 			    }
                   2225: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   2226: 			    if ($1 ne '') {
                   2227: 				my $current_length=$1;
                   2228: 				$current_length=$current_length-$space_to_adjust;
                   2229: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   2230: 			    }				
                   2231: 			}
                   2232: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   2233: 		    }
                   2234: 		}
1.206     sakharuk 2235: 	    } else {
                   2236: 	      #step 3. adjustment over minimal + corrections
1.370     albertel 2237: 		my $enlarge_coef=$available_space/$space_needed;
1.206     sakharuk 2238: 		my $acsessive=0;
                   2239: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2240: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2241: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2242: 			$fwidth[$jn]=$max_len[$jn];
                   2243: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2244: 			$adjust[$jn]=0;
1.357     foxr     2245: 
1.206     sakharuk 2246: 		    }
                   2247: 		}
                   2248: 		if ($acsessive>0) {
                   2249: 		#we have an excess of space and can redistribute it
                   2250: 		    my $notempty_columns=0;
                   2251: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2252: 			if ($adjust[$jn]!=0) {
                   2253: 			    $notempty_columns++;
                   2254: 			}
                   2255: 		    }
                   2256: 		    my $per_column=$acsessive/$notempty_columns;
                   2257: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2258: 			if ($adjust[$jn]!=0) {
                   2259: 			    $adjust[$jn]+=$per_column;
                   2260: 			    $fwidth[$jn]=$adjust[$jn];
                   2261: 			}
1.223     sakharuk 2262: 		    }
                   2263: 		} else {
                   2264: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2265: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2266: 		    }
                   2267: 		}
1.203     sakharuk 2268: 	    }
                   2269: 	}
1.364     foxr     2270:         # use all available width or specified width as if not specified,
                   2271: 	# the specified width gets defaulted to the available width.
                   2272: 
                   2273: 	my $current=0; 
                   2274: 	for (my $i=0;$i<=$#fwidth;$i++) {  
                   2275: 	    $current+=$fwidth[$i];
                   2276: 	}
1.371     albertel 2277: 	if ($current == 0) {
                   2278:             $current = $Apache::londefdef::table[-1]{'width'};
                   2279:         }
1.364     foxr     2280: 	my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
                   2281: 	for (my $i=0;$i<=$#fwidth;$i++) {  
                   2282: 	    $fwidth[$i]*=$coef;
1.206     sakharuk 2283: 	}
                   2284:         #removing of empty columns if allowed
1.208     sakharuk 2285:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2286: 	if ($permission eq 'yes') {
                   2287: 	    my @cleaned_table=();
                   2288:             my @cleaned_header=();
                   2289: 	    my $colind=0;
                   2290: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2291: 		if ($fwidth[$jn]!=0) {
                   2292: 		    #we need to copy column
                   2293: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2294: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2295: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2296: 		    }
                   2297: 		    $colind++;
                   2298: 		}
1.122     albertel 2299: 	    }
1.206     sakharuk 2300: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2301: 	    @fwidth=@cleaned_header;
1.122     albertel 2302: 	}
1.359     foxr     2303: 
1.358     foxr     2304: 
1.206     sakharuk 2305: 	#construct header of the table
                   2306: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2307: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2308: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2309: 	}
                   2310: 	$header_of_table .= '}';
1.357     foxr     2311: 
1.126     sakharuk 2312: 	#fill the table
                   2313: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.306     foxr     2314: 	    my $have_rowspan = 0;
1.206     sakharuk 2315: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
1.320     foxr     2316: 
                   2317: 		#-----------------------------------------------------------
                   2318:                 #   I think this order of doing things will ensure that
                   2319: 		#   single rowspan, columspan and combined row/colspans will
                   2320:                 #   work correctly.  LaTeX is delicate here.
                   2321: 		#    RF.
1.356     foxr     2322: 		
1.320     foxr     2323: 		# Start a rowspan if necessary:
1.356     foxr     2324: 		
                   2325: 		my $primary_col_width = $fwidth[$jn]; # Width of primary column.
1.320     foxr     2326: 		my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
                   2327: 		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
1.304     foxr     2328: 		#
                   2329: 		#  Do the appropriate magic if this has a colspan
                   2330: 		# 
1.356     foxr     2331: 		
1.372     foxr     2332: 		my $border_char = "";
                   2333: 		if ($border) {
                   2334: 		    $border_char = "|";
                   2335: 		}
1.356     foxr     2336: 		my $spanwidth = 0;
1.304     foxr     2337: 		if ($colspan > 1) {
1.336     foxr     2338: 		    for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
                   2339: 			$spanwidth += $fwidth[$spancol];
                   2340: 		    }
1.304     foxr     2341: 		    $output .= '\multicolumn{'.
                   2342: 			$colspan
1.337     foxr     2343: 			."}";
                   2344: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2345: 			$output .= '{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2346: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2347: 			$output .= '{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2348: 		    }
                   2349: 		    else {
1.372     foxr     2350: 			$output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
1.337     foxr     2351: 		    }
1.356     foxr     2352: 		    
                   2353: 		} else {
                   2354: 		    $spanwidth = $primary_col_width; # If no span width will be just colwidth
1.304     foxr     2355: 		}
1.306     foxr     2356: 
1.337     foxr     2357: 		# Rowspan... if colspan is 1, and there's an alignment we'll need
                   2358: 		# to kick in a multicolumn in order to get the alignment spec.
                   2359: 		# this must precede the multirow or LaTex gets quite upset.
                   2360: 		# Naturally if colspan > 1 we've already done that above ^
                   2361: 		#
                   2362: 		my $multirow_aligned = 0;
1.306     foxr     2363: 		if ($rowspan > 1) {
1.337     foxr     2364: 		    if ($colspan == 1) {
                   2365: 			if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2366: 			    $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2367: 			    $multirow_aligned = 1;
                   2368: 			} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2369: 			    $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2370: 			    $multirow_aligned = 1;
                   2371: 			}
                   2372: 		    }
1.306     foxr     2373: 		    $have_rowspan++;
1.356     foxr     2374: 		    if ($multirow_aligned) {
                   2375: 			$output .= '\multirow{'.$rowspan.'}[0]{*}{';
                   2376: 		    } else {
                   2377: 			$output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
                   2378: 		    }
1.350     albertel 2379: 		    
                   2380: 		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
                   2381: 			s{^\s*\\par\s*}{};
                   2382: 		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
                   2383: 			s{\s*\\vskip\s*0pt\s*$}{};
1.356     foxr     2384: 			  
1.337     foxr     2385: 		    #
                   2386: 		    # If we did not throw in a multicolumn to align, then add 
                   2387: 		    # an extra {
                   2388: 		    # so we close correctly without having to keep additional state
                   2389: 		    # around
                   2390: 		    #
                   2391: 		    if (!$multirow_aligned) {
                   2392: 			$output .= '{';
                   2393: 		    }
1.306     foxr     2394: 		}
                   2395: 		if (($rowspan eq '^') || ($rowspan eq '_')) {
                   2396: 		    $have_rowspan++;
                   2397: 		}
1.356     foxr     2398: 		    #--------------------------------------------------------------
1.306     foxr     2399: 
1.337     foxr     2400: 
                   2401: 		# For right and center alignment of single cells.
                   2402: 		# we are going to use a multicolumn with a span of 1 to specify alignment.
                   2403: 		#
                   2404: 		if ($colspan == 1  && $rowspan == 1) {
                   2405: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2406: 			$output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2407: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2408: 			$output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2409: 		    }
1.206     sakharuk 2410: 		}
1.337     foxr     2411: 
1.206     sakharuk 2412: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
1.337     foxr     2413: 
                   2414: 		if (($colspan == 1 && $rowspan == 1)   &&
                   2415: 		    (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
                   2416: 		     ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
                   2417: 		    $output .= '}';
1.206     sakharuk 2418: 		}
1.337     foxr     2419: 
1.306     foxr     2420: 		# Close off any open multirow:
                   2421: 		
                   2422: 		if ($rowspan > 1) {
1.337     foxr     2423: 		    $output .= '}}';
1.306     foxr     2424: 		}
1.304     foxr     2425: 		#  Close off the colspan...
                   2426: 		#
                   2427: 		if ($colspan > 1)  {
                   2428: 		    $output .= '}';
                   2429: 		    $jn += $colspan-1; # Adjust for number of rows really left.
                   2430: 		}
1.206     sakharuk 2431:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2432: 	    }
1.306     foxr     2433: 	    #  If have_rowspan > 0, and borders are on, then 
                   2434: 	    #  we need to do more than put an \hline at the bottom of row.
                   2435: 	    #  we need to do the appropriate \cline to ensure that
                   2436: 	    #  the spanned rows don't have \hlines through them.
                   2437: 
                   2438: 	    if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
                   2439: 		$output .= ' \\\\ ';
                   2440: 		for (my $jn=0; $jn<=$#fwidth;$jn++) {
                   2441: 		    my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
1.320     foxr     2442: 		    if ($rowspan ne "^") {
                   2443: 			if (($rowspan <= 1) || ($rowspan eq '_')) {
                   2444: 			    my $column = $jn+1;
                   2445: 			    $output .= '\cline{'.$column.'-'.$column.'} ';
                   2446: 			}
1.306     foxr     2447: 		    }
                   2448: 		}
                   2449: 
                   2450: 	    } else {
                   2451: 		$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
                   2452: 	    }
1.122     albertel 2453: 	}
1.281     foxr     2454: 	# Note that \newline destroys alignment env's produced  by e.g. <div>
                   2455: 	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
                   2456: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
1.127     sakharuk 2457: 	if ($#Apache::londefdef::table > 0) {	    
                   2458: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
1.294     foxr     2459: 	    # Figure out max/and min width  by summing us and then
                   2460: 	    # apply that to the current column of the table we nest in
                   2461: 	    # if it's larger than the current width or the current width
                   2462: 	    # is undefined.
                   2463: 	    #
                   2464: 	    my $min_nested_width = 0;
                   2465: 	    my $max_nested_width = 0;
                   2466: 	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
                   2467: 		$min_nested_width +=  $min_len[$col];
                   2468: 		$max_nested_width +=  $max_len[$col];
1.300     foxr     2469: 		
1.294     foxr     2470: 	    }
                   2471: 	    # Fudge in an extra 5 mm for borders etc:
                   2472: 	    
                   2473: 	    $min_nested_width += 5;
                   2474: 	    $max_nested_width += 5;
                   2475: 
                   2476: 	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
                   2477: 	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
                   2478: 	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
                   2479: 		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
                   2480: 	    }
                   2481: 	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
                   2482: 		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
                   2483: 	    }
                   2484: 
1.127     sakharuk 2485: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2486: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2487: 	} else {
                   2488: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2489: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2490: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2491: 	}
1.122     albertel 2492:     }
                   2493:     return $currentstring;
                   2494: }
                   2495: 
1.166     sakharuk 2496: #-- <tr> tag (end tag optional)
1.122     albertel 2497: sub start_tr {
                   2498:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2499:     my $currentstring = '';
1.325     albertel 2500:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2501: 	$currentstring = $token->[4];     
                   2502:     } elsif ($target eq 'tex') {
                   2503: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2504: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2505: 	if ($alignchar ne '') {
1.206     sakharuk 2506: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2507: 	} else {
                   2508: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2509: 	}
                   2510: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
1.300     foxr     2511: 	#
                   2512: 	#  Need to save the number of table columns to preserve the max # columns.
                   2513: 	#
                   2514: 	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
1.122     albertel 2515: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2516: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2517: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2518: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2519: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2520: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.122     albertel 2521:     } 
                   2522:     return $currentstring;
                   2523: }
                   2524:         
                   2525: sub end_tr {
1.160     sakharuk 2526:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2527:     my $currentstring = &end_p();	# Close any pending <p> in the row.
1.325     albertel 2528:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2529: 	$currentstring .= $token->[2];     
1.122     albertel 2530:     } elsif ($target eq 'tex') {
1.160     sakharuk 2531: 	if ($Apache::londefdef::TD_redirection) {
                   2532: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2533: 	}
1.300     foxr     2534: 	# Counter columns must be the maximum number of columns seen
                   2535: 	# in the table so far so:
                   2536: 	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
                   2537: 	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
                   2538: 	}
1.295     foxr     2539: 
                   2540: 
1.294     foxr     2541: 	
1.122     albertel 2542:     }
                   2543:     return $currentstring;
                   2544: }
                   2545: 
1.166     sakharuk 2546: #-- <td> tag (end tag optional)
1.122     albertel 2547: sub start_td {
                   2548:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2549:     my $currentstring = '';
1.325     albertel 2550:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2551: 	$currentstring = $token->[4];     
                   2552:     } elsif ($target eq 'tex') {
1.160     sakharuk 2553: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2554: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2555:     } 
                   2556:     return $currentstring;
                   2557: }   
1.159     sakharuk 2558:     
                   2559: sub tag_check {
                   2560:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2561:     my @ar=@$parstack; 
                   2562:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2563: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2564: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2565: 	    last;
                   2566: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2567: 	    splice @ar, $i+1;
                   2568: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2569: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2570: 	    last;
1.159     sakharuk 2571: 	}
1.160     sakharuk 2572:     }
1.159     sakharuk 2573:     return '';
                   2574: }
                   2575:  
                   2576: sub start_td_tex {
                   2577:     my ($parstack,$parser,$safeeval) = @_;
1.206     sakharuk 2578:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2579:     if ($alignchar eq '') {
                   2580: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2581:     }
1.206     sakharuk 2582:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2583:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2584:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2585:     if (defined $TeXwidth) {		
                   2586: 	my $current_length=&recalc($TeXwidth);
                   2587: 	$current_length=~/(\d+\.?\d*)/;
                   2588: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2589:     }
1.159     sakharuk 2590:     &Apache::lonxml::startredirection();
                   2591:     return '';
                   2592: }
                   2593: 
                   2594: sub end_td_tex {
                   2595:     my ($parstack,$parser,$safeeval) = @_;
1.304     foxr     2596:     my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
                   2597:     my $current_column = $Apache::londefdef::table[-1]{'counter_columns'}; 
1.303     foxr     2598:     my $data = &Apache::lonxml::endredirection();
                   2599: 
1.305     foxr     2600:     #  The rowspan array of the table indicates which cells are part of a span.
                   2601:     #  n indicates the start of a span set of n rows.
                   2602:     #  ^ indicates a cell that continues a span set.
1.306     foxr     2603:     #  _ indicates the cell is at the bottom of a span set.
1.305     foxr     2604:     #  If this and subsequent cells are part of a rowspan, we must
                   2605:     #  push along the row until we find one that is not.
                   2606: 
                   2607:     while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column]) 
1.306     foxr     2608: 	   && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
1.305     foxr     2609: 	# Part of a span.
                   2610: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
                   2611: 	$current_column++;
                   2612:     }
                   2613:     $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
                   2614:    
                   2615: 
1.320     foxr     2616:     # Get the column and row spans.
                   2617:     # Colspan can be done via \multicolumn if I can figure out the data structs.
                   2618: 
                   2619:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
                   2620:     if (!$colspan) {
                   2621: 	$colspan = 1;
                   2622:     }
1.305     foxr     2623: 
                   2624:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
                   2625:     if (!$rowspan) {
                   2626: 	$rowspan = 1;
                   2627:     }
                   2628: 
1.303     foxr     2629: 
1.305     foxr     2630: 
1.320     foxr     2631:     for (my $c = 0; $c < $colspan; $c++) {
                   2632: 	$Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
                   2633: 	for (my $i = 1; $i < $rowspan; $i++) {
                   2634: 	    $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
                   2635: 	    if ($i == ($rowspan-1)) {
                   2636: 		$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
                   2637: 	    }
1.306     foxr     2638: 	}
1.305     foxr     2639:     }
1.304     foxr     2640: 
1.159     sakharuk 2641:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2642:     if (defined $TeXwidth) {		
1.357     foxr     2643: 	for (my $c = 0; $c < $colspan; $c++) {
                   2644: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2645: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2646: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2647: 	}
1.159     sakharuk 2648:     } else {
1.206     sakharuk 2649: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2650: 	    my $garbage_data=$data;
                   2651: 	    my $fwidth=0;
                   2652:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2653: 		my $current_length=&recalc($1);
                   2654: 		$current_length=~/(\d+\.?\d*)/;
                   2655: 		if ($fwidth<$1) {$fwidth=$1;}
                   2656: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2657: 	    }
                   2658:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2659: 		my $current_length=$1;
                   2660: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2661: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2662: 	    }
1.357     foxr     2663: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2664: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2665: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2666: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2667: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2668: 	    }
1.231     sakharuk 2669: 	} 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)*/) {
                   2670: 	    my $garbage_data=$data;
                   2671: 	    my $fwidth=0;
                   2672:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2673: 		my $current_length=&recalc($1);
                   2674: 		$current_length=~/(\d+\.?\d*)/;
                   2675: 		if ($fwidth<$1) {$fwidth=$1;}
                   2676: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2677: 	    }
                   2678:             while ($garbage_data=~/\\epsfxsize\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/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2683: 	    }
1.357     foxr     2684: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2685: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2686: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2687: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2688: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2689: 	    }
1.231     sakharuk 2690: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2691: 	} else {  
1.166     sakharuk 2692: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2693: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2694: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2695: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2696: 	    if ($data=~/\\vskip/) {
                   2697:                 my $newdata=$data;
                   2698: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2699: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2700: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2701: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2702: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2703:                     my @words=split(/ /,$elementdata);
                   2704: 		    foreach my $word (@words) {
                   2705: 			my $lengthword=2.5*&LATEX_length($word);
                   2706: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2707: 		    }
1.166     sakharuk 2708: 		}
                   2709: 	    } else {
1.206     sakharuk 2710: 		$current_length=2.5*&LATEX_length($data);
                   2711:                     my @words=split(/ /,$data);
                   2712: 		    foreach my $word (@words) {
1.228     sakharuk 2713: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2714: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2715: 		    }
1.166     sakharuk 2716: 	    }
1.357     foxr     2717: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2718: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2719: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2720: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2721: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2722: 	    }
1.159     sakharuk 2723: 	}        
                   2724:     }
1.302     foxr     2725:     # Substitute all of the tables nested in this cell in their appropriate places.
                   2726: 
                   2727: 
                   2728:     my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
                   2729:     for (my $in=0; $in<=$nested_count; $in++) {    
1.301     foxr     2730: 	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
                   2731: 	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
                   2732: 	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2733: 	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
                   2734: 
                   2735:     }
                   2736:     # Should be be killing off the 'include' elements as they're used up?
1.305     foxr     2737: 
1.206     sakharuk 2738:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.305     foxr     2739: 
1.304     foxr     2740: 
                   2741: 
                   2742: 
                   2743:     #  the colspan array will indicate how many columns will be spanned by this
                   2744:     #  cell..this requires that counter_columns also be adjusted accordingly
                   2745:     #  so that the next bunch of text goes in the right cell.  Note that since
                   2746:     #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
                   2747:     #
                   2748: 
                   2749:     $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
                   2750:     for (my $i = 0; $i < ($colspan -1); $i++) {
                   2751: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
                   2752:     }
1.320     foxr     2753:     for (my $r = 0; $r < $rowspan; $r++) {
                   2754: 	$Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
                   2755: 	# Put empty text in spanned cols.
                   2756: 	
                   2757:     }
                   2758: 
1.304     foxr     2759: 
                   2760: 
1.301     foxr     2761:     return '';
1.159     sakharuk 2762: }
                   2763: 
1.122     albertel 2764: sub end_td {
1.126     sakharuk 2765:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2766:     my $currentstring = '';
1.325     albertel 2767:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2768: 	$currentstring = $token->[2];     
                   2769:     } elsif ($target eq 'tex') {
1.160     sakharuk 2770:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2771: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2772:     }
                   2773:     return $currentstring;
                   2774: }
                   2775: 
1.166     sakharuk 2776: #-- <th> tag (end tag optional)
1.122     albertel 2777: sub start_th {
                   2778:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2779:     my $currentstring = '';
1.325     albertel 2780:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2781: 	$currentstring = $token->[4];     
                   2782:     } elsif ($target eq 'tex') {
1.230     sakharuk 2783: 	$Apache::londefdef::TD_redirection = 1;
                   2784: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2785:     } 
                   2786:     return $currentstring;
1.130     sakharuk 2787: }   
1.230     sakharuk 2788:     
                   2789: sub tagg_check {
                   2790:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2791:     my @ar=@$parstack; 
                   2792:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2793: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2794: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2795: 	    last;
                   2796: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2797: 	    splice @ar, $i+1;
                   2798: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   2799: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2800: 	    last;
                   2801: 	}
                   2802:     }
                   2803:     return '';
                   2804: }
                   2805:  
                   2806: sub start_th_tex {
                   2807:     my ($parstack,$parser,$safeeval) = @_;
                   2808:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2809:     if ($alignchar eq '') {
                   2810: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   2811:     }
                   2812:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   2813:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   2814:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2815:     if (defined $TeXwidth) {		
                   2816: 	my $current_length=&recalc($TeXwidth);
                   2817: 	$current_length=~/(\d+\.?\d*)/;
                   2818: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2819:     }
                   2820:     &Apache::lonxml::startredirection();
                   2821:     return '';
                   2822: }
                   2823: 
                   2824: sub end_th_tex {
                   2825:     my ($parstack,$parser,$safeeval) = @_;
                   2826:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   2827:     my $data=&Apache::lonxml::endredirection();
                   2828:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2829:     if (defined $TeXwidth) {		
                   2830: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2831: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2832: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2833:     } else {
                   2834: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2835: 	    my $garbage_data=$data;
                   2836: 	    my $fwidth=0;
                   2837:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2838: 		my $current_length=&recalc($1);
                   2839: 		$current_length=~/(\d+\.?\d*)/;
                   2840: 		if ($fwidth<$1) {$fwidth=$1;}
                   2841: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2842: 	    }
                   2843:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2844: 		my $current_length=$1;
                   2845: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2846: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2847: 	    }
                   2848: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2849: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2850: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2851: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2852: 	} else {  
                   2853: 	    $data=~s/^\s+(\S.*)/$1/; 
                   2854: 	    $data=~s/(.*\S)\s+$/$1/;
                   2855: 	    $data=~s/(\s)+/$1/;
                   2856: 	    my ($current_length,$min_length)=(0,0);
                   2857: 	    if ($data=~/\\vskip/) {
                   2858:                 my $newdata=$data;
                   2859: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2860: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2861: 		foreach my $elementdata (@newdata) {
                   2862: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   2863: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   2864:                     my @words=split(/ /,$elementdata);
                   2865: 		    foreach my $word (@words) {
                   2866: 			my $lengthword=2.5*&LATEX_length($word);
                   2867: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2868: 		    }
                   2869: 		}
                   2870: 	    } else {
                   2871: 		$current_length=2.5*&LATEX_length($data);
                   2872:                     my @words=split(/ /,$data);
                   2873: 		    foreach my $word (@words) {
                   2874: 			my $lengthword=2*&LATEX_length($word);
                   2875: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2876: 		    }
                   2877: 	    }
                   2878: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2879: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2880: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2881: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2882: 	}        
                   2883:     }
                   2884: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   2885: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2886: 	}
                   2887:     #make data bold
                   2888:     $data='\textbf{'.$data.'}';
                   2889:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
                   2890:     return'';
                   2891: }
                   2892: 
1.122     albertel 2893: sub end_th {
1.130     sakharuk 2894:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2895:     my $currentstring = &end_p();	# Close any open <p> in the row.
1.325     albertel 2896:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2897: 	$currentstring .= $token->[2];     
1.122     albertel 2898:     } elsif ($target eq 'tex') {
1.230     sakharuk 2899:         $Apache::londefdef::TD_redirection =0;
                   2900: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 2901:     }
                   2902:     return $currentstring;
                   2903: }
1.230     sakharuk 2904:      
1.181     sakharuk 2905: #-- <img> tag (end tag forbidden)
1.249     foxr     2906: #
                   2907: #  Render the <IMG> tag.
                   2908: #     <IMG> has the following attributes (in addition to the 
                   2909: #     standard HTML ones:
                   2910: #      TeXwrap   - Governs how the tex target will try to wrap text around
                   2911: #                  horizontally aligned images.
                   2912: #      TeXwidth  - The width of the image when rendered for print (mm).
                   2913: #      TeXheight - The height of the image when rendered for print (mm)
                   2914: #         (Note there seems to also be support for this as a % of page size)
                   2915: #      
1.122     albertel 2916: sub start_img {
1.299     albertel 2917:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel 2918:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   2919: 					 undef,1);
1.325     albertel 2920:     if (! $src && 
                   2921: 	($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
                   2922: 	) { 
1.299     albertel 2923: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
1.189     albertel 2924: 	return '';
                   2925:     }
1.290     albertel 2926:     &Apache::lonxml::extlink($src);
1.122     albertel 2927:     my $currentstring = '';
                   2928:     my $scaling = .3;
1.249     foxr     2929: 
                   2930:    # Render unto browsers that which are the browser's...
                   2931: 
1.325     albertel 2932:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 2933: 	if ($env{'browser.imagesuppress'} ne 'on') {
1.322     albertel 2934: 	    my $enc = ('yes' eq 
                   2935: 		       lc(&Apache::lonxml::get_param('encrypturl',$parstack,
                   2936: 						     $safeeval)));
                   2937: 	    $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
                   2938: 							 $enc);
1.122     albertel 2939: 	} else {
1.322     albertel 2940: 	    my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
                   2941: 						    undef,1);
                   2942: 	    if (!$alttag) {
                   2943: 		$alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   2944: 						   $src);
1.51      sakharuk 2945: 	    }
1.158     sakharuk 2946: 	    $currentstring.='[IMAGE: '.$alttag.']';
1.1       sakharuk 2947: 	}
1.249     foxr     2948: 
                   2949: 	# and render unto TeX that which is LaTeX
                   2950: 
1.122     albertel 2951:     } elsif ($target eq 'tex') {
1.248     foxr     2952: 	#
                   2953: 	#  The alignment will require some superstructure to be put around
                   2954: 	#  the \includegraphics stuff.  At present we can only partially
                   2955: 	#  simulate the alignments offered by html.
                   2956: 	#
                   2957: 	#
                   2958: 	my $align = lc(&Apache::lonxml::get_param('align', 
                   2959: 						  $parstack,
                   2960: 						  $safeeval,
                   2961: 						  undef,1));
                   2962: 	if(!$align) {
1.287     foxr     2963: 		$align = "bottom";	# This is html's default so it's ours too.
1.248     foxr     2964: 	}
                   2965: 	#
                   2966: 	&Apache::lonxml::debug("Alignemnt = $align");
                   2967: 	#  LaTeX's image/text wrapping is really bad since it wants to
                   2968: 	#  make figures float.  
                   2969:         #   The user has the optional parameter (applicable only to l/r
                   2970: 	# alignment to use the picins/parpic directive to get wrapped text
                   2971: 	# this is also imperfect.. that's why we give them a choice...
                   2972: 	# so they can't yell at us for our choice.
                   2973: 	#
                   2974: 	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
                   2975: 							    $parstack,
                   2976: 							    $safeeval,
                   2977: 							    undef,0);
1.312     foxr     2978: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
1.248     foxr     2979: 	if(!$latex_rendering) {
1.312     foxr     2980: 		$latex_rendering = "texwrap";
                   2981: 	}
                   2982: 	# using texwrap inside a table does not work. So, if after all of this,
                   2983: 	# texwrap is on, we turn it off if we detect we're in a table:
                   2984: 	#
                   2985: 	if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
                   2986: 	    $latex_rendering = 'parpic';
1.248     foxr     2987: 	}
1.323     foxr     2988: 
1.312     foxr     2989: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
1.248     foxr     2990: 
1.256     albertel 2991: 	#if original gif/jpg/png file exist do following:
1.266     albertel 2992: 	my $origsrc=$src;
1.256     albertel 2993: 	my ($path,$file) = &get_eps_image($src);
1.341     foxr     2994: 	# &Apache::lonnet::logthis("Image source: $src result: $path $file");
1.122     albertel 2995: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.261     foxr     2996: 	&Apache::lonxml::debug("path = $path file = $file src = $src");
1.192     sakharuk 2997: 	if (-e $src) {
1.261     foxr     2998: 	    &Apache::lonxml::debug("$src exists");
1.256     albertel 2999: 	    my ($height_param,$width_param)=
1.266     albertel 3000: 		&image_size($origsrc,0.3,$parstack,$safeeval);
                   3001: 	    my $size;
                   3002: 	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
                   3003: 	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
1.341     foxr     3004: 	    # Default size if not able to extract that (e.g. eps image).
                   3005: 	    
                   3006: 	    # &Apache::lonnet::logthis("Size = $size");
                   3007: 	    
1.266     albertel 3008: 	    $size='['.$size;
                   3009: 	    $size=~s/,$/]/; 
1.344     albertel 3010: 	    $currentstring .= '\graphicspath{{'.$path.'}}'
                   3011: 		.'\includegraphics'.$size.'{'.$file.'} ';
1.354     foxr     3012: 	    my $closure;
                   3013: 	    ($currentstring, $closure) = &align_latex_image($align, 
                   3014: 							    $latex_rendering, 
                   3015: 							    $currentstring, 
                   3016: 							    $width_param, 
                   3017: 							    $height_param);
                   3018: 	    $currentstring .= $closure;
1.353     foxr     3019: 						
1.122     albertel 3020: 	} else {
1.261     foxr     3021: 	    &Apache::lonxml::debug("$src does not exist");
1.122     albertel 3022: 	    #original image file doesn't exist so check the alt attribute
                   3023: 	    my $alt = 
                   3024: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   3025: 	    unless ($alt) {
                   3026: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   3027: 	    }
                   3028: 
1.256     albertel 3029: 	    if ($alt) { $currentstring .= ' '.$alt.' '; }
1.59      sakharuk 3030: 	}
1.249     foxr     3031: 
                   3032: 	# And here's where the semi-quote breaks down: allow the user
                   3033:         # to edit the beast as well by rendering the problem for edit:
1.186     albertel 3034:     } elsif ($target eq 'edit') {
1.368     banghart 3035:         my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
1.186     albertel 3036: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   3037: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
1.368     banghart 3038: 	    &Apache::edit::browse('src',undef,'alt',$only).' '.
1.186     albertel 3039: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   3040: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   3041: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   3042: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   3043: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   3044: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 3045: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   3046: 						   ['','bottom','middle','top','left','right'],$token,5);
1.249     foxr     3047: 	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
1.348     albertel 3048: 						   ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
1.332     www      3049: 	$currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
1.322     albertel 3050: 						   ['no','yes'], $token, 2);
1.186     albertel 3051: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.249     foxr     3052: 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
                   3053: 	my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   3054: 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
                   3055: 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
                   3056: 
                   3057: 
1.186     albertel 3058: 	$currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   3059: 	if ($width) { $currentstring.=' width="'.$width.'" '; }
                   3060: 	if ($height) { $currentstring.=' height="'.$height.'" '; }
                   3061: 	$currentstring .= ' />';
                   3062:     } elsif ($target eq 'modified') {
1.210     albertel 3063: 	my ($osrc,$owidth,$oheight)=
                   3064: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   3065: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 3066: 					     $safeeval,'src','alt','align',
1.249     foxr     3067: 					     'TeXwidth','TeXheight', 'TeXwrap',
1.322     albertel 3068: 					     'width','height','encrypturl');
1.210     albertel 3069: 	my ($nsrc,$nwidth,$nheight)=
                   3070: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   3071: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   3072: 	&image_replication($loc);
                   3073: 	my ($iwidth,$iheight);
                   3074: 	if (-e $loc) {
                   3075: 	    my $image = Image::Magick->new;
                   3076: 	    $image->Read($loc);
                   3077: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   3078: 				   $image->Get('height'));
                   3079: 	}
                   3080: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   3081: 	    # changed image or no size specified,
                   3082:             # if they didn't explicitly change the 
                   3083:             # width or height use the ones from the image
                   3084: 	    if ($iwidth && $iheight) {
                   3085: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   3086: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   3087: 		}
                   3088: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   3089: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 3090: 		}
                   3091: 	    }
                   3092: 	}
1.210     albertel 3093: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   3094: 	# if we don't have a width or height
                   3095: 	if ($iwidth && $cwidth && !$cheight) {
                   3096: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   3097: 	}
                   3098: 	if ($iheight && $cheight && !$cwidth) {
                   3099: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   3100: 	}
                   3101: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 3102:     }
1.261     foxr     3103: 
1.122     albertel 3104:     return $currentstring;
                   3105: }
                   3106: 
                   3107: sub end_img {
                   3108:     my ($target,$token) = @_;
                   3109:     my $currentstring = '';
1.325     albertel 3110:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3111: 	$currentstring = $token->[2];
                   3112:     } elsif ($target eq 'tex') {
                   3113: 	$currentstring = '';
                   3114:     }
                   3115:     return $currentstring;
                   3116: }
                   3117: 
1.181     sakharuk 3118: #-- <applet> tag (end tag required)
1.122     albertel 3119: sub start_applet {
                   3120:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3121:     
                   3122:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
1.290     albertel 3123:     &Apache::lonxml::extlink($code);
1.122     albertel 3124:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   3125: 					   undef,1);
1.290     albertel 3126:     &Apache::lonxml::extlink($archive);
1.122     albertel 3127:     my $currentstring = '';
1.325     albertel 3128:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3129: 	if ($env{'browser.appletsuppress'} ne 'on') {
1.250     albertel 3130: 	    $currentstring = &Apache::lonenc::encrypt_ref($token,
                   3131: 							  {'code'=>$code,
                   3132: 							   'archive'=>$archive}
                   3133: 							  );
1.122     albertel 3134: 	} else {
                   3135: 	    my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3136: 						   $safeeval,undef,1);
                   3137: 	    unless ($alttag) {
                   3138: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3139: 						 $code);
1.44      sakharuk 3140: 	    }
1.122     albertel 3141: 	    $currentstring='[APPLET: '.$alttag.']';
1.1       sakharuk 3142: 	}
1.122     albertel 3143:     } elsif ($target eq 'tex') {
1.361     foxr     3144: 	# Turn off some stuff we can't be inside thank you LaTeX
                   3145: 	
                   3146: 
                   3147: 	my $restart_sub = 0;
                   3148: 	my $restart_sup = 0;
                   3149: 
                   3150: 	# Since <sub> and <sup> are simple tags it's ok to turn off/on
                   3151: 	# using the start_ stop_ functions.. those tags only care about
                   3152: 	# $target.
                   3153: 
                   3154: 	if (&is_inside_of($tagstack, "sub")) {
                   3155: 	    $restart_sub = 1;
                   3156: 	    $currentstring .= &end_sub($target, $token, $tagstack, 
                   3157: 				       $parstack, $parser, $safeeval);
                   3158: 	}
                   3159: 	if (&is_inside_of($tagstack, "sup")) {
                   3160: 	    $restart_sup = 1;
                   3161: 	    $currentstring .= &end_sup($target, $token, $tagstack,
                   3162: 				       $parstack, $parser, $safeeval);
                   3163: 	}
                   3164: 
                   3165: 	# Now process the applet; just replace it with its alt attribute.
                   3166: 
1.177     albertel 3167: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3168: 					       $safeeval,undef,1);
                   3169: 	unless ($alttag) {
                   3170: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   3171: 						undef,1);
                   3172: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3173: 					     $code);
1.175     sakharuk 3174: 	}
1.177     albertel 3175: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   3176: 	    '.}\end{center}';
1.361     foxr     3177: 
                   3178: 	# Turn stuff back on that we can't be inside of.
                   3179: 
                   3180: 	if ($restart_sub) {
                   3181: 	    $currentstring .= &start_sub($target, $token, $tagstack,
                   3182: 					$parstack, $parser, $safeeval);
                   3183: 	}
                   3184: 	if ($restart_sup) {
                   3185: 	    $currentstring .= &start_sup($target, $token, $tagstack,
                   3186: 					 $parstack, $parser, $safeeval);
                   3187: 	}
1.122     albertel 3188:     } 
                   3189:     return $currentstring;
                   3190: }
                   3191: 
                   3192: sub end_applet {
                   3193:     my ($target,$token) = @_;
                   3194:     my $currentstring = '';
1.325     albertel 3195:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3196: 	$currentstring = $token->[2];
                   3197:     } elsif ($target eq 'tex') {
                   3198:     } 
                   3199:     return $currentstring;
                   3200: }
                   3201: 
1.181     sakharuk 3202: #-- <embed> tag (end tag optional/required)
1.122     albertel 3203: sub start_embed {    
                   3204:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3205:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3206:     &Apache::lonxml::extlink($src);
1.122     albertel 3207:     my $currentstring = '';
1.325     albertel 3208:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3209: 	if ($env{'browser.embedsuppress'} ne 'on') {
1.250     albertel 3210: 	    $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 3211: 	} else {
                   3212: 	    my $alttag=&Apache::lonxml::get_param
                   3213: 		('alt',$parstack,$safeeval,undef,1);
                   3214: 	    unless ($alttag) {
                   3215: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
1.42      albertel 3216: 	    }
1.122     albertel 3217: 	    $currentstring='[EMBED: '.$alttag.']';
1.10      www      3218: 	}
1.122     albertel 3219:     } elsif ($target eq 'tex') {
                   3220:     } 
                   3221:     return $currentstring;
                   3222: }
                   3223: 
                   3224: sub end_embed {
                   3225:     my ($target,$token) = @_;
                   3226:     my $currentstring = '';
1.325     albertel 3227:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3228: 	$currentstring = $token->[2];     
1.175     sakharuk 3229:     } elsif ($target eq 'tex') {  
1.122     albertel 3230:     } 
                   3231:     return $currentstring;
                   3232: }
                   3233: 
1.181     sakharuk 3234: #-- <param> tag (end tag forbidden)
1.122     albertel 3235: sub start_param {
                   3236:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.290     albertel 3237:     if (&Apache::lonxml::get_param('name',$parstack,
                   3238: 				   $safeeval,undef,1)=~/^cabbase$/i) {
                   3239: 	my $value=&Apache::lonxml::get_param('value',$parstack,
                   3240: 					     $safeeval,undef,1);
                   3241: 	&Apache::lonxml::extlink($value);
                   3242:     } 
                   3243:   
                   3244:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3245:     &Apache::lonxml::extlink($src);
1.122     albertel 3246:     my $currentstring = '';
1.325     albertel 3247:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 3248: 	my %toconvert;
                   3249: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3250: 	if ($src) { $toconvert{'src'}= $src; }
                   3251: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
                   3252: 					    undef,1);
1.251     albertel 3253: 	if ($name=~/^cabbase$/i) {
                   3254: 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
                   3255: 							   $safeeval,undef,1);
                   3256: 	}
1.250     albertel 3257: 	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
1.122     albertel 3258:     } elsif ($target eq 'tex') {
                   3259:     } 
                   3260:     return $currentstring;
                   3261: }
                   3262: 
                   3263: sub end_param {
                   3264:     my ($target,$token) = @_;
                   3265:     my $currentstring = '';
1.325     albertel 3266:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3267: 	$currentstring = $token->[2];     
                   3268:     } elsif ($target eq 'tex') {
                   3269:     } 
                   3270:     return $currentstring;
                   3271: }
                   3272: 
                   3273: #-- <allow> tag
                   3274: sub start_allow {
                   3275:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3276:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3277:     &Apache::lonxml::extlink($src);
                   3278: 
1.241     albertel 3279:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 3280:     my $result;
                   3281:     if ($target eq 'edit') {
                   3282: 	$result .=&Apache::edit::tag_start($target,$token);
                   3283: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   3284: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   3285:     } elsif ($target eq 'modified') {
                   3286: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   3287: 						     $safeeval,'src');
                   3288: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   3289:     }
                   3290:     return $result;
                   3291: }
                   3292: 
                   3293: sub end_allow {
                   3294:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3295:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   3296:     return '';
                   3297: }
1.119     www      3298: 
1.181     sakharuk 3299: #-- Frames (end tag required)
                   3300: #-- <frameset>
1.122     albertel 3301: sub start_frameset {
                   3302:     my ($target,$token) = @_;
1.277     foxr     3303:     my $currentstring = '';	# Close any pending para.
1.325     albertel 3304:     if ($target eq 'web' || $target eq 'webgrade') { 
1.328     albertel 3305: 	$currentstring = 
                   3306: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
                   3307: 					   $Apache::londefdef::head,
                   3308: 					   {'add_entries'    => $token->[2],
                   3309: 					    'no_title'       => 1,
                   3310: 					    'force_register' => 1,
                   3311: 					    'frameset'       => 1,});
                   3312: 
1.122     albertel 3313:     }
                   3314:     return $currentstring;
                   3315: }
                   3316: 
                   3317: sub end_frameset {
                   3318:     my ($target,$token) = @_;
                   3319:     my $currentstring = '';
1.325     albertel 3320:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3321: 	$currentstring = $token->[2];
                   3322:     }
                   3323:     return $currentstring;
                   3324: }
1.162     sakharuk 3325: 
1.181     sakharuk 3326: #-- <xmp> (end tag required)
1.162     sakharuk 3327: sub start_xmp {
                   3328:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3329:     my $currentstring = '';
1.325     albertel 3330:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3331: 	$currentstring .= $token->[4];
                   3332:     } elsif ($target eq 'tex') {
                   3333: 	$currentstring .= '\begin{verbatim}';
                   3334:     } 
                   3335:     return $currentstring;
                   3336: }
                   3337: 
                   3338: sub end_xmp {
                   3339:     my ($target,$token) = @_;
                   3340:     my $currentstring = '';
1.325     albertel 3341:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3342: 	$currentstring .= $token->[2];
                   3343:     } elsif ($target eq 'tex') {
                   3344: 	$currentstring .= '\end{verbatim}';
                   3345:     }
                   3346:     return $currentstring;
                   3347: }
                   3348: 
1.181     sakharuk 3349: #-- <pre> (end tag required)
1.122     albertel 3350: sub start_pre {
1.126     sakharuk 3351:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3352:     my $currentstring = &end_p();	# close off pending <p>
1.325     albertel 3353:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3354: 	$currentstring .= $token->[4];
                   3355:     } elsif ($target eq 'tex') {
1.136     sakharuk 3356: 	$currentstring .= '\begin{verbatim}';
1.319     albertel 3357: 	&Apache::lonxml::disable_LaTeX_substitutions();
1.122     albertel 3358:     } 
                   3359:     return $currentstring;
                   3360: }
                   3361: 
                   3362: sub end_pre {
                   3363:     my ($target,$token) = @_;
                   3364:     my $currentstring = '';
1.325     albertel 3365:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3366: 	$currentstring .= $token->[2];
                   3367:     } elsif ($target eq 'tex') {
1.136     sakharuk 3368: 	$currentstring .= '\end{verbatim}';
1.319     albertel 3369: 	&Apache::lonxml::enable_LaTeX_substitutions();
1.122     albertel 3370:     }
                   3371:     return $currentstring;
                   3372: }
                   3373: 
                   3374: #-- <insert>
                   3375: sub start_insert {
                   3376:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3377:     my $currentstring = '';
1.325     albertel 3378:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3379: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3380: 	$currentstring .= '<b>'.$display.'</b>';;
                   3381:     }
                   3382:     return $currentstring;
                   3383: }
                   3384: 
                   3385: sub end_insert {
                   3386:     my ($target,$token) = @_;
                   3387:     my $currentstring = '';
1.325     albertel 3388:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3389: 	$currentstring .= '';
                   3390:     }
                   3391:     return $currentstring;
                   3392: }
                   3393: 
                   3394: #-- <externallink>
                   3395: sub start_externallink {
                   3396:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3397:     my $currentstring = '';
1.325     albertel 3398:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3399: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3400: 	$currentstring .= '<b>'.$display.'</b>';;
                   3401:     }
                   3402:     return $currentstring;
                   3403: }
                   3404: 
                   3405: sub end_externallink {
                   3406:     my ($target,$token) = @_;
                   3407:     my $currentstring = '';
1.325     albertel 3408:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3409: 	$currentstring .= '';
                   3410:     }
                   3411:     return $currentstring;
                   3412: }
                   3413: 
                   3414: #-- <blankspace heigth="">
                   3415: sub start_blankspace {
                   3416:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3417:     my $currentstring = &end_p();	# closes off any unclosed <p>
1.122     albertel 3418:     if ($target eq 'tex') {
                   3419: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   3420: 	$currentstring .= '\vskip '.$howmuch.' ';
                   3421:     }
                   3422:     return $currentstring;
                   3423: }
                   3424: 
                   3425: sub end_blankspace {
                   3426:     my ($target,$token) = @_;
                   3427:     my $currentstring = '';
                   3428:     if ($target eq 'tex') {
                   3429: 	$currentstring .= '';
                   3430:     }
                   3431:     return $currentstring;
                   3432: }
                   3433: 
1.181     sakharuk 3434: #-- <abbr> tag (end tag required)
1.122     albertel 3435: sub start_abbr {
                   3436:     my ($target,$token) = @_;
                   3437:     my $currentstring = '';
1.325     albertel 3438:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3439: 	$currentstring = $token->[4];     
                   3440:     } 
                   3441:     return $currentstring;
                   3442: }
                   3443: 
                   3444: sub end_abbr {
                   3445:     my ($target,$token) = @_;
                   3446:     my $currentstring = '';
1.325     albertel 3447:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3448: 	$currentstring = $token->[2];    
                   3449:     } 
                   3450:     return $currentstring;
                   3451: }
                   3452: 
1.181     sakharuk 3453: #-- <acronym> tag (end tag required)
1.122     albertel 3454: sub start_acronym {
                   3455:     my ($target,$token) = @_;
                   3456:     my $currentstring = '';
1.325     albertel 3457:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3458: 	$currentstring = $token->[4];     
                   3459:     } 
                   3460:     return $currentstring;
                   3461: }
                   3462: 
                   3463: sub end_acronym {
                   3464:     my ($target,$token) = @_;
                   3465:     my $currentstring = '';
1.325     albertel 3466:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3467: 	$currentstring = $token->[2];    
                   3468:     } 
                   3469:     return $currentstring;
                   3470: }
                   3471: 
1.181     sakharuk 3472: #-- <area> tag (end tag forbidden)
1.122     albertel 3473: sub start_area {
                   3474:     my ($target,$token) = @_;
                   3475:     my $currentstring = '';
1.325     albertel 3476:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3477: 	$currentstring = $token->[4];     
                   3478:     } 
                   3479:     return $currentstring;
                   3480: }
                   3481: 
                   3482: sub end_area {
                   3483:     my ($target,$token) = @_;
                   3484:     my $currentstring = '';
1.325     albertel 3485:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3486: 	$currentstring = $token->[2];    
                   3487:     } 
                   3488:     return $currentstring;
                   3489: }
                   3490: 
1.181     sakharuk 3491: #-- <base> tag (end tag forbidden)
1.122     albertel 3492: sub start_base {
                   3493:     my ($target,$token) = @_;
                   3494:     my $currentstring = '';
1.325     albertel 3495:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3496: 	$currentstring = $token->[4];     
1.161     sakharuk 3497:     }
1.122     albertel 3498:     return $currentstring;
                   3499: }
                   3500: 
                   3501: sub end_base {
                   3502:     my ($target,$token) = @_;
                   3503:     my $currentstring = '';
1.325     albertel 3504:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3505: 	$currentstring = $token->[2];    
                   3506:     } 
                   3507:     return $currentstring;
                   3508: }
                   3509: 
1.181     sakharuk 3510: #-- <bdo> tag (end tag required)
1.122     albertel 3511: sub start_bdo {
                   3512:     my ($target,$token) = @_;
                   3513:     my $currentstring = '';
1.325     albertel 3514:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3515: 	$currentstring = $token->[4];     
                   3516:     } 
                   3517:     return $currentstring;
                   3518: }
                   3519: 
                   3520: sub end_bdo {
                   3521:     my ($target,$token) = @_;
                   3522:     my $currentstring = '';
1.325     albertel 3523:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3524: 	$currentstring = $token->[2];    
                   3525:     } 
                   3526:     return $currentstring;
                   3527: }
                   3528: 
1.181     sakharuk 3529: #-- <bgsound> tag (end tag optional)
1.122     albertel 3530: sub start_bgsound {
                   3531:     my ($target,$token) = @_;
                   3532:     my $currentstring = '';
1.325     albertel 3533:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3534: 	$currentstring = $token->[4];     
                   3535:     } 
                   3536:     return $currentstring;
                   3537: }
                   3538: 
                   3539: sub end_bgsound {
                   3540:     my ($target,$token) = @_;
                   3541:     my $currentstring = '';
1.325     albertel 3542:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3543: 	$currentstring = $token->[2];    
                   3544:     } 
                   3545:     return $currentstring;
                   3546: }
                   3547: 
1.181     sakharuk 3548: #-- <blink> tag (end tag required)
1.122     albertel 3549: sub start_blink {
                   3550:     my ($target,$token) = @_;
                   3551:     my $currentstring = '';
1.325     albertel 3552:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3553: 	$currentstring = $token->[4];     
                   3554:     } 
                   3555:     return $currentstring;
                   3556: }
                   3557: 
                   3558: sub end_blink {
                   3559:     my ($target,$token) = @_;
                   3560:     my $currentstring = '';
1.325     albertel 3561:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3562: 	$currentstring = $token->[2];    
                   3563:     } 
                   3564:     return $currentstring;
                   3565: }
                   3566: 
1.181     sakharuk 3567: #-- <blockquote> tag (end tag required)
1.122     albertel 3568: sub start_blockquote {
                   3569:     my ($target,$token) = @_;
1.279     foxr     3570:     my $currentstring = &end_p();	# Close any unclosed <p>
1.325     albertel 3571:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3572: 	$currentstring .= $token->[4];     
1.122     albertel 3573:     } 
1.339     foxr     3574:     if ($target eq 'tex') {
                   3575: 	$currentstring .= '\begin{quote}';
                   3576:     }
1.122     albertel 3577:     return $currentstring;
                   3578: }
                   3579: 
                   3580: sub end_blockquote {
                   3581:     my ($target,$token) = @_;
                   3582:     my $currentstring = '';
1.325     albertel 3583:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3584: 	$currentstring = $token->[2];    
                   3585:     } 
1.339     foxr     3586:     if ($target eq 'tex') {
                   3587: 	$currentstring = '\end{quote}';
                   3588:     }
1.122     albertel 3589:     return $currentstring;
                   3590: }
                   3591: 
1.181     sakharuk 3592: #-- <button> tag (end tag required)
1.122     albertel 3593: sub start_button {
                   3594:     my ($target,$token) = @_;
                   3595:     my $currentstring = '';
1.325     albertel 3596:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3597: 	$currentstring = $token->[4];     
                   3598:     } 
                   3599:     return $currentstring;
                   3600: }
                   3601: 
                   3602: sub end_button {
                   3603:     my ($target,$token) = @_;
                   3604:     my $currentstring = '';
1.325     albertel 3605:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3606: 	$currentstring = $token->[2];    
                   3607:     } 
                   3608:     return $currentstring;
                   3609: }
                   3610: 
1.181     sakharuk 3611: #-- <caption> tag (end tag required)
1.122     albertel 3612: sub start_caption {
                   3613:     my ($target,$token) = @_;
                   3614:     my $currentstring = '';
1.325     albertel 3615:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3616: 	$currentstring = $token->[4];     
                   3617:     } 
                   3618:     return $currentstring;
                   3619: }
                   3620: 
                   3621: sub end_caption {
                   3622:     my ($target,$token) = @_;
                   3623:     my $currentstring = '';
1.325     albertel 3624:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3625: 	$currentstring = $token->[2];    
                   3626:     } 
                   3627:     return $currentstring;
                   3628: }
                   3629: 
1.181     sakharuk 3630: #-- <col> tag (end tag forbdden)
1.122     albertel 3631: sub start_col {
                   3632:     my ($target,$token) = @_;
                   3633:     my $currentstring = '';
1.325     albertel 3634:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3635: 	$currentstring = $token->[4];     
                   3636:     } 
                   3637:     return $currentstring;
                   3638: }
                   3639: 
                   3640: sub end_col {
                   3641:     my ($target,$token) = @_;
                   3642:     my $currentstring = '';
1.325     albertel 3643:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3644: 	$currentstring = $token->[2];    
                   3645:     } 
                   3646:     return $currentstring;
                   3647: }
                   3648: 
1.181     sakharuk 3649: #-- <colgroup> tag (end tag optional)
1.122     albertel 3650: sub start_colgroup {
                   3651:     my ($target,$token) = @_;
                   3652:     my $currentstring = '';
1.325     albertel 3653:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3654: 	$currentstring = $token->[4];     
                   3655:     } 
                   3656:     return $currentstring;
                   3657: }
                   3658: 
                   3659: sub end_colgroup {
                   3660:     my ($target,$token) = @_;
                   3661:     my $currentstring = '';
1.325     albertel 3662:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3663: 	$currentstring = $token->[2];    
                   3664:     } 
                   3665:     return $currentstring;
                   3666: }
                   3667: 
1.181     sakharuk 3668: #-- <del> tag (end tag required)
1.122     albertel 3669: sub start_del {
                   3670:     my ($target,$token) = @_;
                   3671:     my $currentstring = '';
1.325     albertel 3672:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3673: 	$currentstring = $token->[4];     
                   3674:     } 
                   3675:     return $currentstring;
                   3676: }
                   3677: 
                   3678: sub end_del {
                   3679:     my ($target,$token) = @_;
                   3680:     my $currentstring = '';
1.325     albertel 3681:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3682: 	$currentstring = $token->[2];    
                   3683:     } 
                   3684:     return $currentstring;
                   3685: }
                   3686: 
1.181     sakharuk 3687: #-- <fieldset> tag (end tag required)
1.122     albertel 3688: sub start_fieldset {
                   3689:     my ($target,$token) = @_;
                   3690:     my $currentstring = '';
1.325     albertel 3691:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3692: 	$currentstring = $token->[4];     
                   3693:     } 
                   3694:     return $currentstring;
                   3695: }
                   3696: 
                   3697: sub end_fieldset {
                   3698:     my ($target,$token) = @_;
                   3699:     my $currentstring = '';
1.325     albertel 3700:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3701: 	$currentstring = $token->[2];    
                   3702:     } 
                   3703:     return $currentstring;
                   3704: }
                   3705: 
1.181     sakharuk 3706: #-- <frame> tag (end tag forbidden)
1.122     albertel 3707: sub start_frame {
                   3708:     my ($target,$token) = @_;
                   3709:     my $currentstring = '';
1.325     albertel 3710:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3711: 	$currentstring = $token->[4];     
                   3712:     } 
                   3713:     return $currentstring;
                   3714: }
                   3715: 
                   3716: sub end_frame {
                   3717:     my ($target,$token) = @_;
                   3718:     my $currentstring = '';
1.325     albertel 3719:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3720: 	$currentstring = $token->[2];    
                   3721:     } 
                   3722:     return $currentstring;
                   3723: }
                   3724: 
1.181     sakharuk 3725: #-- <iframe> tag (end tag required)
1.122     albertel 3726: sub start_iframe {
                   3727:     my ($target,$token) = @_;
                   3728:     my $currentstring = '';
1.325     albertel 3729:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3730: 	$currentstring = $token->[4];     
                   3731:     } 
                   3732:     return $currentstring;
                   3733: }
                   3734: 
                   3735: sub end_iframe {
                   3736:     my ($target,$token) = @_;
                   3737:     my $currentstring = '';
1.325     albertel 3738:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3739: 	$currentstring = $token->[2];    
                   3740:     } 
                   3741:     return $currentstring;
                   3742: }
                   3743: 
1.181     sakharuk 3744: #-- <ins> tag (end tag required)
1.122     albertel 3745: sub start_ins {
                   3746:     my ($target,$token) = @_;
                   3747:     my $currentstring = '';
1.325     albertel 3748:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3749: 	$currentstring = $token->[4];     
                   3750:     } 
                   3751:     return $currentstring;
                   3752: }
                   3753: 
                   3754: sub end_ins {
                   3755:     my ($target,$token) = @_;
                   3756:     my $currentstring = '';
1.325     albertel 3757:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3758: 	$currentstring = $token->[2];    
                   3759:     } 
                   3760:     return $currentstring;
                   3761: }
                   3762: 
1.181     sakharuk 3763: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3764: sub start_isindex {
                   3765:     my ($target,$token) = @_;
                   3766:     my $currentstring = '';
1.325     albertel 3767:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3768: 	$currentstring = $token->[4];     
                   3769:     } 
                   3770:     return $currentstring;
                   3771: }
                   3772: 
                   3773: sub end_isindex {
                   3774:     my ($target,$token) = @_;
                   3775:     my $currentstring = '';
1.325     albertel 3776:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3777: 	$currentstring = $token->[2];    
                   3778:     } 
                   3779:     return $currentstring;
                   3780: }
                   3781: 
1.181     sakharuk 3782: #-- <keygen> tag (end tag forbidden)
1.122     albertel 3783: sub start_keygen {
                   3784:     my ($target,$token) = @_;
                   3785:     my $currentstring = '';
1.325     albertel 3786:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3787: 	$currentstring = $token->[4];     
                   3788:     } 
                   3789:     return $currentstring;
                   3790: }
                   3791: 
                   3792: sub end_keygen {
                   3793:     my ($target,$token) = @_;
                   3794:     my $currentstring = '';
1.325     albertel 3795:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3796: 	$currentstring = $token->[2];    
                   3797:     } 
                   3798:     return $currentstring;
                   3799: }
                   3800: 
                   3801: #-- <label> tag
                   3802: sub start_label {
                   3803:     my ($target,$token) = @_;
                   3804:     my $currentstring = '';
1.325     albertel 3805:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3806: 	$currentstring = $token->[4];     
                   3807:     } 
                   3808:     return $currentstring;
                   3809: }
                   3810: 
                   3811: sub end_label {
                   3812:     my ($target,$token) = @_;
                   3813:     my $currentstring = '';
1.325     albertel 3814:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3815: 	$currentstring = $token->[2];    
                   3816:     } 
                   3817:     return $currentstring;
                   3818: }
                   3819: 
1.181     sakharuk 3820: #-- <layer> tag (end tag required)
1.122     albertel 3821: sub start_layer {
                   3822:     my ($target,$token) = @_;
                   3823:     my $currentstring = '';
1.325     albertel 3824:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3825: 	$currentstring = $token->[4];     
                   3826:     } 
                   3827:     return $currentstring;
                   3828: }
                   3829: 
                   3830: sub end_layer {
                   3831:     my ($target,$token) = @_;
                   3832:     my $currentstring = '';
1.325     albertel 3833:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3834: 	$currentstring = $token->[2];    
                   3835:     } 
                   3836:     return $currentstring;
                   3837: }
                   3838: 
1.181     sakharuk 3839: #-- <legend> tag (end tag required)
1.122     albertel 3840: sub start_legend {
                   3841:     my ($target,$token) = @_;
                   3842:     my $currentstring = '';
1.325     albertel 3843:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3844: 	$currentstring = $token->[4];     
                   3845:     } 
                   3846:     return $currentstring;
                   3847: }
                   3848: 
                   3849: sub end_legend {
                   3850:     my ($target,$token) = @_;
                   3851:     my $currentstring = '';
1.325     albertel 3852:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3853: 	$currentstring = $token->[2];    
                   3854:     } 
                   3855:     return $currentstring;
                   3856: }
                   3857: 
1.181     sakharuk 3858: #-- <link> tag (end tag forbidden)
1.122     albertel 3859: sub start_link {
1.292     albertel 3860:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 3861:     my $currentstring = '';
1.324     albertel 3862:     if ($target eq 'web' || $target eq 'webgrade') {
1.291     albertel 3863: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   3864: 					    undef,1);
                   3865: 	&Apache::lonxml::extlink($href);
1.122     albertel 3866: 	$currentstring = $token->[4];     
                   3867:     } 
                   3868:     return $currentstring;
                   3869: }
                   3870: 
                   3871: sub end_link {
                   3872:     my ($target,$token) = @_;
                   3873:     my $currentstring = '';
1.325     albertel 3874:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3875: 	$currentstring = $token->[2];    
                   3876:     } 
                   3877:     return $currentstring;
                   3878: }
                   3879: 
1.181     sakharuk 3880: #-- <marquee> tag (end tag optional)
1.122     albertel 3881: sub start_marquee {
                   3882:     my ($target,$token) = @_;
                   3883:     my $currentstring = '';
1.325     albertel 3884:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3885: 	$currentstring = $token->[4];     
                   3886:     } 
                   3887:     return $currentstring;
                   3888: }
                   3889: 
                   3890: sub end_marquee {
                   3891:     my ($target,$token) = @_;
                   3892:     my $currentstring = '';
1.325     albertel 3893:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3894: 	$currentstring = $token->[2];    
                   3895:     } 
                   3896:     return $currentstring;
                   3897: }
                   3898: 
1.179     sakharuk 3899: #-- <multicol> tag (end tag required)
                   3900: sub start_multicol {
1.122     albertel 3901:     my ($target,$token) = @_;
1.279     foxr     3902:     my $currentstring = &end_p();	# Close any pending <p>
1.325     albertel 3903:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3904: 	$currentstring .= $token->[4];     
1.122     albertel 3905:     } 
                   3906:     return $currentstring;
                   3907: }
                   3908: 
1.179     sakharuk 3909: sub end_multicol {
1.122     albertel 3910:     my ($target,$token) = @_;
                   3911:     my $currentstring = '';
1.325     albertel 3912:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3913: 	$currentstring = $token->[2];    
                   3914:     } 
                   3915:     return $currentstring;
                   3916: }
                   3917: 
1.179     sakharuk 3918: #-- <nobr> tag (end tag required)
1.122     albertel 3919: sub start_nobr {
                   3920:     my ($target,$token) = @_;
                   3921:     my $currentstring = '';
1.325     albertel 3922:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3923: 	$currentstring = $token->[4];     
1.179     sakharuk 3924:     }  elsif ($target eq 'tex') {
                   3925: 	$currentstring='\mbox{';
                   3926:     }
1.122     albertel 3927:     return $currentstring;
                   3928: }
                   3929: 
                   3930: sub end_nobr {
                   3931:     my ($target,$token) = @_;
                   3932:     my $currentstring = '';
1.325     albertel 3933:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3934: 	$currentstring = $token->[2];    
1.179     sakharuk 3935:     }   elsif ($target eq 'tex') {
                   3936: 	$currentstring='}';
                   3937:     }
1.122     albertel 3938:     return $currentstring;
                   3939: }
                   3940: 
1.179     sakharuk 3941: #-- <noembed> tag (end tag required)
1.122     albertel 3942: sub start_noembed {
                   3943:     my ($target,$token) = @_;
                   3944:     my $currentstring = '';
1.325     albertel 3945:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3946: 	$currentstring = $token->[4];     
                   3947:     } 
                   3948:     return $currentstring;
                   3949: }
                   3950: 
                   3951: sub end_noembed {
                   3952:     my ($target,$token) = @_;
                   3953:     my $currentstring = '';
1.325     albertel 3954:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3955: 	$currentstring = $token->[2];    
                   3956:     } 
                   3957:     return $currentstring;
                   3958: }
                   3959: 
1.179     sakharuk 3960: #-- <noframes> tag (end tag required)
1.122     albertel 3961: sub start_noframes {
                   3962:     my ($target,$token) = @_;
                   3963:     my $currentstring = '';
1.325     albertel 3964:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3965: 	$currentstring = $token->[4];     
                   3966:     } 
                   3967:     return $currentstring;
                   3968: }
                   3969: 
                   3970: sub end_noframes {
                   3971:     my ($target,$token) = @_;
                   3972:     my $currentstring = '';
1.325     albertel 3973:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3974: 	$currentstring = $token->[2];    
                   3975:     } 
                   3976:     return $currentstring;
                   3977: }
                   3978: 
1.179     sakharuk 3979: #-- <nolayer> tag (end tag required)
1.122     albertel 3980: sub start_nolayer {
                   3981:     my ($target,$token) = @_;
                   3982:     my $currentstring = '';
1.325     albertel 3983:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3984: 	$currentstring = $token->[4];     
                   3985:     } 
                   3986:     return $currentstring;
                   3987: }
                   3988: 
                   3989: sub end_nolayer {
                   3990:     my ($target,$token) = @_;
                   3991:     my $currentstring = '';
1.325     albertel 3992:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3993: 	$currentstring = $token->[2];    
                   3994:     } 
                   3995:     return $currentstring;
                   3996: }
                   3997: 
1.179     sakharuk 3998: #-- <noscript> tag (end tag required)
1.122     albertel 3999: sub start_noscript {
                   4000:     my ($target,$token) = @_;
                   4001:     my $currentstring = '';
1.325     albertel 4002:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4003: 	$currentstring = $token->[4];     
                   4004:     } 
                   4005:     return $currentstring;
                   4006: }
                   4007: 
                   4008: sub end_noscript {
                   4009:     my ($target,$token) = @_;
                   4010:     my $currentstring = '';
1.325     albertel 4011:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4012: 	$currentstring = $token->[2];    
                   4013:     } 
                   4014:     return $currentstring;
                   4015: }
                   4016: 
1.179     sakharuk 4017: #-- <object> tag (end tag required)
1.122     albertel 4018: sub start_object {
                   4019:     my ($target,$token) = @_;
                   4020:     my $currentstring = '';
1.325     albertel 4021:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4022: 	$currentstring = $token->[4];     
                   4023:     } 
                   4024:     return $currentstring;
                   4025: }
                   4026: 
                   4027: sub end_object {
                   4028:     my ($target,$token) = @_;
                   4029:     my $currentstring = '';
1.325     albertel 4030:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4031: 	$currentstring = $token->[2];    
                   4032:     } 
                   4033:     return $currentstring;
                   4034: }
                   4035: 
1.179     sakharuk 4036: #-- <optgroup> tag (end tag required)
1.122     albertel 4037: sub start_optgroup {
                   4038:     my ($target,$token) = @_;
                   4039:     my $currentstring = '';
1.325     albertel 4040:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4041: 	$currentstring = $token->[4];     
                   4042:     } 
                   4043:     return $currentstring;
                   4044: }
                   4045: 
                   4046: sub end_optgroup {
                   4047:     my ($target,$token) = @_;
                   4048:     my $currentstring = '';
1.325     albertel 4049:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4050: 	$currentstring = $token->[2];    
                   4051:     } 
                   4052:     return $currentstring;
                   4053: }
                   4054: 
1.179     sakharuk 4055: #-- <samp> tag (end tag required)
1.122     albertel 4056: sub start_samp {
                   4057:     my ($target,$token) = @_;
                   4058:     my $currentstring = '';
1.325     albertel 4059:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4060: 	$currentstring = $token->[4];     
1.179     sakharuk 4061:     } elsif ($target eq 'tex') {
                   4062: 	$currentstring='\texttt{';
                   4063:     }
1.122     albertel 4064:     return $currentstring;
                   4065: }
                   4066: 
                   4067: sub end_samp {
                   4068:     my ($target,$token) = @_;
                   4069:     my $currentstring = '';
1.325     albertel 4070:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4071: 	$currentstring = $token->[2];    
1.179     sakharuk 4072:     } elsif ($target eq 'tex') {
                   4073: 	$currentstring='}';
                   4074:     }
1.122     albertel 4075:     return $currentstring;
                   4076: }
                   4077: 
                   4078: #-- <server> tag
                   4079: sub start_server {
                   4080:     my ($target,$token) = @_;
                   4081:     my $currentstring = '';
1.325     albertel 4082:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4083: 	$currentstring = $token->[4];     
                   4084:     } 
                   4085:     return $currentstring;
                   4086: }
                   4087: 
                   4088: sub end_server {
                   4089:     my ($target,$token) = @_;
                   4090:     my $currentstring = '';
1.325     albertel 4091:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4092: 	$currentstring = $token->[2];    
                   4093:     } 
                   4094:     return $currentstring;
                   4095: }
                   4096: 
1.179     sakharuk 4097: #-- <spacer> tag (end tag forbidden)
1.122     albertel 4098: sub start_spacer {
                   4099:     my ($target,$token) = @_;
1.279     foxr     4100:     my $currentstring = &end_p();	# Close off any open <p> tag.
1.325     albertel 4101:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     4102: 	$currentstring .= $token->[4];     
1.122     albertel 4103:     } 
                   4104:     return $currentstring;
                   4105: }
                   4106: 
                   4107: sub end_spacer {
                   4108:     my ($target,$token) = @_;
                   4109:     my $currentstring = '';
1.325     albertel 4110:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4111: 	$currentstring = $token->[2];    
                   4112:     } 
                   4113:     return $currentstring;
                   4114: }
                   4115: 
1.179     sakharuk 4116: #-- <span> tag (end tag required)
1.122     albertel 4117: sub start_span {
                   4118:     my ($target,$token) = @_;
                   4119:     my $currentstring = '';
1.325     albertel 4120:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4121: 	$currentstring = $token->[4];     
                   4122:     } 
                   4123:     return $currentstring;
                   4124: }
                   4125: 
                   4126: sub end_span {
                   4127:     my ($target,$token) = @_;
                   4128:     my $currentstring = '';
1.325     albertel 4129:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4130: 	$currentstring = $token->[2];    
                   4131:     } 
                   4132:     return $currentstring;
                   4133: }
                   4134: 
1.179     sakharuk 4135: #-- <tbody> tag (end tag optional)
1.122     albertel 4136: sub start_tbody {
                   4137:     my ($target,$token) = @_;
                   4138:     my $currentstring = '';
1.325     albertel 4139:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4140: 	$currentstring = $token->[4];     
                   4141:     } 
                   4142:     return $currentstring;
                   4143: }
                   4144: 
                   4145: sub end_tbody {
                   4146:     my ($target,$token) = @_;
                   4147:     my $currentstring = '';
1.325     albertel 4148:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4149: 	$currentstring = $token->[2];    
                   4150:     } 
                   4151:     return $currentstring;
                   4152: }
                   4153: 
1.166     sakharuk 4154: #-- <tfoot> tag (end tag optional)
1.122     albertel 4155: sub start_tfoot {
                   4156:     my ($target,$token) = @_;
                   4157:     my $currentstring = '';
1.325     albertel 4158:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4159: 	$currentstring = $token->[4];     
                   4160:     } 
                   4161:     return $currentstring;
                   4162: }
                   4163: 
                   4164: sub end_tfoot {
                   4165:     my ($target,$token) = @_;
                   4166:     my $currentstring = '';
1.325     albertel 4167:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4168: 	$currentstring = $token->[2];    
                   4169:     } 
                   4170:     return $currentstring;
                   4171: }
                   4172: 
1.166     sakharuk 4173: #-- <thead> tag (end tag optional)
1.122     albertel 4174: sub start_thead {
                   4175:     my ($target,$token) = @_;
                   4176:     my $currentstring = '';
1.325     albertel 4177:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4178: 	$currentstring = $token->[4];     
                   4179:     } 
                   4180:     return $currentstring;
                   4181: }
1.10      www      4182: 
1.122     albertel 4183: sub end_thead {
                   4184:     my ($target,$token) = @_;
                   4185:     my $currentstring = '';
1.325     albertel 4186:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4187: 	$currentstring = $token->[2];    
                   4188:     } 
                   4189:     return $currentstring;
                   4190: }
1.119     www      4191: 
1.122     albertel 4192: #-- <var> tag
                   4193: sub start_var {
1.44      sakharuk 4194:     my ($target,$token) = @_;
                   4195:     my $currentstring = '';
1.325     albertel 4196:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4197: 	$currentstring = $token->[4];     
1.163     sakharuk 4198:     } elsif ($target eq 'tex') {
                   4199: 	$currentstring = '\textit{'; 
                   4200:     }
1.44      sakharuk 4201:     return $currentstring;
                   4202: }
1.10      www      4203: 
1.122     albertel 4204: sub end_var {
                   4205:     my ($target,$token) = @_;
1.44      sakharuk 4206:     my $currentstring = '';
1.325     albertel 4207:     if ($target eq 'web' || $target eq 'webgrade') {
1.163     sakharuk 4208: 	$currentstring = $token->[2];
                   4209:     } elsif ($target eq 'tex') {
                   4210: 	$currentstring = '}'; 
1.44      sakharuk 4211:     } 
                   4212:     return $currentstring;
                   4213: }
1.119     www      4214: 
1.163     sakharuk 4215: #-- <wbr> tag (end tag forbidden)
1.122     albertel 4216: sub start_wbr {
                   4217:     my ($target,$token) = @_;
                   4218:     my $currentstring = '';
1.325     albertel 4219:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4220: 	$currentstring = $token->[4];     
                   4221:     } 
                   4222:     return $currentstring;
1.98      albertel 4223: }
                   4224: 
1.122     albertel 4225: sub end_wbr {
                   4226:     my ($target,$token) = @_;
                   4227:     my $currentstring = '';
1.325     albertel 4228:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4229: 	$currentstring = $token->[2];    
                   4230:     } 
                   4231:     return $currentstring;
1.98      albertel 4232: }
1.134     sakharuk 4233: 
                   4234: #-- <hideweboutput> tag
                   4235: sub start_hideweboutput {
                   4236:     my ($target,$token) = @_;
1.325     albertel 4237:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4238: 	&Apache::lonxml::startredirection();     
                   4239:     } 
                   4240:     return '';
                   4241: }
                   4242: 
                   4243: sub end_hideweboutput {
                   4244:     my ($target,$token) = @_;
                   4245:     my $currentstring = '';
1.325     albertel 4246:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4247: 	$currentstring = &Apache::lonxml::endredirection();    
                   4248:     } 
                   4249:     return '';
                   4250: }
                   4251: 
1.94      sakharuk 4252: 
                   4253: sub image_replication {
                   4254:     my $src = shift;
1.187     albertel 4255:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   4256:     #replicates eps or ps 
                   4257:     my $epssrc = my $pssrc = $src;
                   4258:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   4259:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   4260:     if (not -e $epssrc && not -e $pssrc) {
                   4261: 	my $result=&Apache::lonnet::repcopy($epssrc);
1.264     raeburn  4262: 	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 4263:     }
                   4264:     return '';
1.195     sakharuk 4265: }
1.275     foxr     4266: #
                   4267: #   Get correct sizing parameter for an image given
                   4268: #   it's initial ht. and wid.  This allows sizing of
                   4269: #   images that are generated on-the-fly (e.g. gnuplot)
                   4270: #   as well as serving as a utility for image_size.
                   4271: # 
                   4272: #  Parameter:
                   4273: #        height_param
                   4274: #        width_param    - Initial picture dimensions.
                   4275: #        scaling        - A scale factor.
                   4276: #        parstack,      - the current stack of tag attributes 
                   4277: #                         from the xml parser
                   4278: #        safeeval,      - pointer to the safespace
                   4279: #        depth,         - from what level in the stack to look for attributes
                   4280: #                         (assumes -1 if unspecified)
                   4281: #        cis            - look for attrubutes case insensitively
                   4282: #                         (assumes false)
                   4283: #
                   4284: # Returns:
                   4285: #   height, width   - new dimensions.
                   4286: #
                   4287: sub resize_image {
                   4288:     my ($height_param, $width_param, $scaling,
                   4289: 	$parstack, $safeeval, $depth, $cis) = @_;
                   4290: 
                   4291:     # First apply the scaling...
1.271     foxr     4292: 
1.275     foxr     4293:     $height_param = $height_param * $scaling;
                   4294:     $width_param  = $width_param  * $scaling;
1.261     foxr     4295: 
1.197     sakharuk 4296:     #do we have any specified LaTeX size of the picture?
1.261     foxr     4297:     my $toget='TeXwidth'; 
                   4298:     if ($cis) { 
                   4299: 	$toget=lc($toget); 
                   4300:     }
1.256     albertel 4301:     my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
                   4302: 					      $safeeval,$depth,$cis);
                   4303:     $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
                   4304:     my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
                   4305: 					       $safeeval,$depth,$cis);
1.197     sakharuk 4306:     #do we have any specified web size of the picture?
                   4307:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
1.256     albertel 4308: 					   $depth,1);
                   4309:     if ($TeXwidth) { 
1.252     matthew  4310: 	my $old_width_param=$width_param;
1.197     sakharuk 4311: 	if ($TeXwidth=~/(\d+)\s*\%/) {
1.267     albertel 4312: 	    $width_param = $1*$env{'form.textwidth'}/100;
1.197     sakharuk 4313: 	} else { 
                   4314: 	    $width_param = $TeXwidth;
                   4315: 	}
1.266     albertel 4316: 	if ($TeXheight) {
                   4317: 	    $height_param = $TeXheight;
                   4318: 	} elsif ($old_width_param) {
                   4319: 	    $height_param=$TeXwidth/$old_width_param*$height_param;
                   4320: 	}
1.256     albertel 4321:     } elsif ($TeXheight) {
1.248     foxr     4322: 	$height_param = $TeXheight;
1.266     albertel 4323: 	if ($height_param) {
                   4324: 	    $width_param  = $TeXheight/$height_param*$width_param;
                   4325: 	}
1.256     albertel 4326:     } elsif ($width) {
1.252     matthew  4327: 	my $old_width_param=$width_param;
1.256     albertel 4328: 	$width_param = $width*$scaling;
1.266     albertel 4329: 	if ($old_width_param) {
                   4330: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4331: 	}
1.252     matthew  4332:     }
1.267     albertel 4333:     if ($width_param > $env{'form.textwidth'}) {
1.252     matthew  4334:         my $old_width_param=$width_param;
1.267     albertel 4335: 	$width_param =0.95*$env{'form.textwidth'};
1.266     albertel 4336: 	if ($old_width_param) {
                   4337: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4338: 	}
1.197     sakharuk 4339:     }
1.275     foxr     4340: 
                   4341:     return ($height_param, $width_param);
                   4342: }
                   4343: 
                   4344: sub image_size {
                   4345:     my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
                   4346: 
                   4347:     #size of image from gif/jpg/jpeg/png 
                   4348:     my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   4349:     if (-e $ressrc) {
                   4350: 	$src = $ressrc;
                   4351:     }
                   4352:     my $image = Image::Magick->new;
                   4353:     my $current_figure = $image->Read($src);
                   4354:     my $width_param = $image->Get('width');
                   4355:     my $height_param = $image->Get('height');
                   4356:     &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
                   4357:     undef($image);
                   4358: 
                   4359:     ($height_param, $width_param) = &resize_image($height_param, $width_param,
                   4360: 						  $scaling, $parstack, $safeeval, 
                   4361: 						  $depth, $cis);
                   4362: 
1.248     foxr     4363:     return ($height_param, $width_param);
                   4364: }
                   4365: 
                   4366: sub image_width {
                   4367:     my ($height, $width) = &image_size(@_);
                   4368:     return $width;
                   4369: }
                   4370: #  Not yet 100% sure this is correct in all circumstances..
                   4371: #  due to my uncertainty about mods to image_size.
                   4372: #
                   4373: sub image_height {
                   4374:     my ($height, $width) = &image_size(@_);
                   4375:     return $height;
1.197     sakharuk 4376: }
                   4377: 
1.256     albertel 4378: sub get_eps_image {
                   4379:     my ($src)=@_;
1.261     foxr     4380:     my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
1.285     foxr     4381: 
                   4382:     # In order to prevent the substitution of the alt text, we need to
                   4383:     # be sure the orig_src file is on system now so:
                   4384: 
                   4385:     if (! -e $orig_src) {
                   4386: 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
                   4387:     }
1.275     foxr     4388:     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
1.344     albertel 4389:     my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
1.256     albertel 4390:     $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
                   4391:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.275     foxr     4392:     &Apache::lonxml::debug("Filelocation gives: $src");
1.256     albertel 4393:     if (! -e $src) {
1.261     foxr     4394: 	&Apache::lonxml::debug("$src does not exist");
1.264     raeburn  4395: 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
1.261     foxr     4396: 	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
1.256     albertel 4397: 	    #if replication failed try to find ps file
                   4398: 	    $src=~s/\.eps$/\.ps/;
1.261     foxr     4399: 	    &Apache::lonxml::debug("Now looking for $src");
1.270     foxr     4400: 	    #if no ps file try to replicate it.
                   4401: 	    my $didrepcopy = &Apache::lonnet::repcopy($src);
                   4402: 	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
                   4403: 	    if ( (not -e $src) ||
                   4404: 		($didrepcopy ne 'ok')) {
1.261     foxr     4405: 		&Apache::lonxml::debug("Failed to find or replicate $src");
                   4406: 
1.256     albertel 4407: 		#if replication failed try to produce eps file dynamically
                   4408: 		$src=~s/\.ps$/\.eps/;
                   4409: 		my $temp_file;
1.267     albertel 4410: 		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.256     albertel 4411: 		my $newsrc=$orig_src;
                   4412: 		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
1.275     foxr     4413: 		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
1.344     albertel 4414: 		print FILE ("$newsrc\n");
                   4415: 		close(FILE);
1.256     albertel 4416: 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4417: 		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.283     albertel 4418: 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
                   4419: 		    $src =~ s/\.eps$/$sext.eps/;
                   4420: 		}
1.341     foxr     4421: 
1.256     albertel 4422: 	    }
1.343     foxr     4423: 
1.256     albertel 4424: 	}
1.341     foxr     4425:     } else {
                   4426: 	# If the postscript file has spaces in its name,
                   4427: 	# LaTeX will gratuitiously vomit.  Therefore
                   4428: 	# queue such files for copy with " " replaced by "_".
                   4429: 	# printout.pm will know them by their .ps  or .eps extensions.
                   4430: 	my $newsrc = $orig_src;
                   4431: 	$newsrc    =~  s|(.*)/res/|/home/httpd/html/res/|;
                   4432: 	open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.343     foxr     4433: 	print FILE "$src\n";
1.341     foxr     4434: 	close FILE;
                   4435: 	$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4436: 	$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.256     albertel 4437:     }
                   4438:     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
1.344     albertel 4439:     $path =~ s/ /\_/g;
1.343     foxr     4440:     $file =~ s/ /\_/g;
1.261     foxr     4441:     &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
1.256     albertel 4442:     return ($path.'/',$file);
                   4443: }
                   4444: 
1.195     sakharuk 4445: sub eps_generation {
                   4446:     my ($src,$file,$width_param) = @_;	     
1.267     albertel 4447:     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
1.195     sakharuk 4448:     my $temp_file = Apache::File->new('>>'.$filename); 
                   4449:     print $temp_file "$src\n";
                   4450:     my $newsrc = $src;
                   4451:     $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
1.345     albertel 4452:     $newsrc=~s{/home/httpd/html/res}{};
                   4453:     $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
                   4454:     $newsrc=~s{/\./}{/};
                   4455:     $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
                   4456:     if ($newsrc=~m{/home/httpd/lonUsers/}) {
                   4457: 	$newsrc=~s{/home/httpd/lonUsers}{};
                   4458: 	$newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
1.213     sakharuk 4459:     }
1.345     albertel 4460:     if ($newsrc=~m{/userfiles/}) {
1.239     sakharuk 4461: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4462:     } else {
                   4463: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4464:     }
1.197     sakharuk 4465: }
                   4466: 
                   4467: sub file_path {     
                   4468:     my $src=shift;
                   4469:     my ($file,$path); 
                   4470:     if ($src =~ m!(.*)/([^/]*)$!) {
                   4471: 	$file = $2; 
                   4472: 	$path = $1.'/'; 
                   4473:     } 
                   4474:     return $file,$path;
1.126     sakharuk 4475: }
1.294     foxr     4476: #  Converts a measurement in to mm from any of 
                   4477: #  the other valid LaTeX units of measure.
                   4478: #  If the units of measure are missing from the 
                   4479: #  parameter, it is assumed to be in and returned
                   4480: #  with mm units of measure
1.126     sakharuk 4481: sub recalc {
                   4482:     my $argument = shift;
                   4483:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 4484:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 4485:     my $value=$1;
                   4486:     my $units=$2;
                   4487:     if ($units eq 'cm') {
                   4488: 	$value*=10;
                   4489:     } elsif ($units eq 'in') {
                   4490: 	$value*=25.4;
                   4491:     } elsif ($units eq 'pc') {
                   4492: 	$value*=(25.4*12/72.27);
                   4493:     } elsif ($units eq 'pt') {
                   4494: 	$value*=(25.4/72.27);
                   4495:     }
                   4496:     return $value.' mm';
1.94      sakharuk 4497: }
1.184     sakharuk 4498: 
                   4499: sub LATEX_length {
                   4500:     my $garbage=shift;
1.206     sakharuk 4501:     $garbage=~s/^\s+$//;
                   4502:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   4503:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   4504:     $garbage=~s/(\s)+/$1/;#only one space
                   4505:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   4506:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   4507:     $garbage=~s/([^\\])\$/$1/g;#$
                   4508:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   4509:    $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 4510:     $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;
                   4511:     $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;
                   4512:     $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 4513:     $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;
                   4514:     $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;
                   4515:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   4516:     #remove some other LaTeX command
                   4517:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   4518:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   4519:     $garbage=~s|\+|11|g;
1.184     sakharuk 4520:     my  $value=length($garbage);
                   4521:     return $value;
                   4522: }
                   4523: 
1.353     foxr     4524: #   Wrap image 'stuff' inside of the LaTeX required to implement 
                   4525: #   alignment:
                   4526: #     align_tex_image(align, latex_rendering, image)
                   4527: #   Where:
                   4528: #     align   - The HTML alignment specification.
                   4529: #     latex_rendering - rendering hint for latex.
                   4530: #     image   - The LaTeX needed to insert the image itsef.
                   4531: #     width,height - dimensions of the image.
1.354     foxr     4532: # Returns:
                   4533: #    The 1/2 wrapped image and the stuff required to close the
                   4534: #    wrappage.  This allows e.g. randomlabel to insert more stuff
                   4535: #    into the closure.
1.353     foxr     4536: #
                   4537: sub align_latex_image {
                   4538:     my ($align, $latex_rendering, $image, $width, $height) = @_;
1.354     foxr     4539:     my $currentstring;        # The 1/2 wrapped image.
                   4540:     my $closure;              # The closure of the wrappage.
1.353     foxr     4541:     #    If there's an alignment specification we need to honor it here.
                   4542:     #    For the horizontal alignments, we will also honor the
                   4543:     #    value of the latex specfication.  The default is parbox,
                   4544:     #    and that's used for illegal values too.  
                   4545:     #    
                   4546:     #    Even though we set a default alignment value, the user
                   4547:     #    could have given us an illegal value.  In that case we
                   4548:     #    just use the default alignment of bottom..
1.354     foxr     4549:     $currentstring = "\n% figurewrapping \n";
1.353     foxr     4550:     if      ($align eq "top")    {
1.354     foxr     4551: 	$currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
                   4552: 	$closure = '}';
1.353     foxr     4553:     } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
                   4554: 	my $offset = $height/2;
1.354     foxr     4555: 	$currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
                   4556: 	$closure       = '}';
1.353     foxr     4557:     } elsif ($align eq "left")   { 
                   4558: 	if ($latex_rendering eq "parpic") { 
1.354     foxr     4559: 	    $currentstring .= '\parpic[l]{'.$image;
                   4560: 	    $closure       = '}';
1.353     foxr     4561: 	} elsif ($latex_rendering eq "parbox") {
1.354     foxr     4562: 	    $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
                   4563: 		.$image;
                   4564: 	    $closure = '\end{minipage}';
1.353     foxr     4565: 	} elsif ($latex_rendering eq "wrapfigure"
                   4566: 		 || $latex_rendering ne 'none') {  # wrapfig render
1.354     foxr     4567: 	    $currentstring .= 
1.353     foxr     4568: 		'\begin{wrapfigure}{l}{'.$width.'mm}'
1.354     foxr     4569: 		.'\scalebox{1.0}{'.$image;
                   4570: 	    $closure = '}\end{wrapfigure}';
1.353     foxr     4571: 	}
                   4572:     } elsif ($align eq "right")  {   
                   4573: 	if ($latex_rendering eq "parpic") {
1.354     foxr     4574: 	    $currentstring .= '\parpic[r]{'.$image;
                   4575: 	    $closure = '}';
1.353     foxr     4576: 	} elsif ($latex_rendering eq "parbox") {
1.354     foxr     4577: 	    $currentstring .=  '\begin{minipage}[r]{'.$width.'mm}'
                   4578: 		.$image;
                   4579: 	    $closure = '\end{minipage}';
1.353     foxr     4580: 	} elsif ($latex_rendering eq "wrapfigure"
                   4581: 		 || $latex_rendering ne 'none') {  # wrapfig render
1.354     foxr     4582: 	    $currentstring .= 
1.353     foxr     4583: 		'\begin{wrapfigure}{r}{'.$width.'mm}'
1.354     foxr     4584: 		.'\scalebox{1.0}{'.$image;
                   4585: 	    $closure = '}\end{wrapfigure}';
1.353     foxr     4586: 	}
                   4587:     } else {		# Bottom is also default.
                   4588: 	# $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
1.354     foxr     4589: 	$currentstring .= "{$image";
                   4590: 	$closure       = '}';
1.353     foxr     4591:     }
1.354     foxr     4592:     $currentstring .= "\n% end wrappage\n";
                   4593:     $closure        = "\n% Begin closure\n".$closure."\n% End closure\n";
                   4594:     return ($currentstring, $closure);
1.353     foxr     4595: }
1.184     sakharuk 4596: 
1.287     foxr     4597: # is_inside_of $tagstack $tag
                   4598: #    This sub returns true if the current state of Xml processing
                   4599: #    is inside of the tag.   
                   4600: # Parameters:
                   4601: #     tagstack   - The tagstack from the parser.
                   4602: #     tag        - The tag (without the <>'s.).
                   4603: # Sample usage:
                   4604: #     if (is_inside_of($tagstack "table")) {
                   4605: #          # I'm in a table....
                   4606: #      }
                   4607: sub is_inside_of {
                   4608:     my ($tagstack, $tag) = @_;
                   4609:     my @stack = @$tagstack;
                   4610:     for (my $i = ($#stack - 1); $i >= 0; $i--) {
                   4611: 	if ($stack[$i] eq $tag) {
                   4612: 	    return 1;
                   4613: 	}
                   4614:     }
                   4615:     return 0;
                   4616: }
1.184     sakharuk 4617: 
1.94      sakharuk 4618: 
1.1       sakharuk 4619: 1;
                   4620: __END__

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