Annotation of loncom/xml/londefdef.pm, revision 1.422

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.422   ! foxr        4: # $Id: londefdef.pm,v 1.421 2010/08/16 15:56:08 raeburn 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;
1.398     foxr       45: use Apache::lontable;
1.57      sakharuk   46: use Apache::File();
1.70      sakharuk   47: use Image::Magick;
1.118     www        48: use Apache::lonmenu();
                     49: use Apache::lonmeta();
1.389     www        50: use Apache::lonlocal;
1.187     albertel   51: use Apache::Constants qw(:common);
1.282     foxr       52: use File::Basename;
1.345     albertel   53: use LONCAPA();
1.302     foxr       54: # use Data::Dumper;
1.160     sakharuk   55: 
1.38      harris41   56: BEGIN {
1.15      sakharuk   57: 
1.135     sakharuk   58:     &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   59: 
1.188     albertel   60: }
                     61: 
1.398     foxr       62: 
1.188     albertel   63: sub initialize_londefdef {
                     64:     $Apache::londefdef::TD_redirection=0;
                     65:     @Apache::londefdef::table = ();
                     66:     $Apache::londefdef::select=0;
1.243     albertel   67:     undef(@Apache::londefdef::description);
                     68:     @Apache::londefdef::DD=(0);
                     69:     @Apache::londefdef::DT=(0);
1.244     albertel   70:     @Apache::londefdef::seenDT=(0);
1.238     albertel   71:     $Apache::londefdef::list_index=0;
1.327     albertel   72:     undef($Apache::londefdef::head);
                     73:     undef($Apache::londefdef::title);
1.3       sakharuk   74: }
1.1       sakharuk   75: 
1.35      sakharuk   76: #======================= TAG SUBROUTINES =====================
1.8       sakharuk   77: #-- <output>
1.21      albertel   78: sub start_output {
1.122     albertel   79:     my ($target) = @_;
                     80:     if ($target eq 'meta') { $Apache::lonxml::metamode--; }
                     81:     return '';
1.21      albertel   82: }
                     83: sub end_output {
1.122     albertel   84:     my ($target) = @_;
                     85:     if ($target eq 'meta') { $Apache::lonxml::metamode++; }
                     86:     return '';
1.21      albertel   87: }
1.4       sakharuk   88: #-- <m> tag
1.33      albertel   89: sub start_m {
1.190     albertel   90:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel   91:     my $currentstring = '';
1.193     albertel   92:     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
1.191     albertel   93:     if ($target eq 'web' || $target eq 'analyze') {
1.122     albertel   94: 	&Apache::lonxml::debug("M is starting with:$inside:");
                     95: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                     96: 	if ($eval eq 'on') {
                     97: 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
1.392     bisitz     98: 	    #&Apache::lonxml::debug("M is evaluated to:$inside:");
1.122     albertel   99: 	}
1.317     albertel  100: 	my $tex = $inside;
1.276     albertel  101: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                    102: 	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
1.122     albertel  103: 	if ($Apache::lontexconvert::errorstring) {
1.392     bisitz    104: 	    my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occurred while attempting to convert this TeX: <pre>';
1.317     albertel  105: 	    $tex = &HTML::Entities::encode($tex,'<>&"');
                    106: 	    my ($linenumber) =
                    107: 		($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
                    108: 	    if (defined($linenumber)) {
                    109: 		my @tex=split("\n",$tex);
                    110: 		$tex[$linenumber]='<b><font color="red">'.
                    111: 		    $tex[$linenumber].'</font></b>';
                    112: 		$tex=join("\n",@tex);
                    113: 	    }
                    114: 	    &Apache::lonxml::warning($errormsg.$tex.'</pre>');
1.122     albertel  115: 	    $Apache::lontexconvert::errorstring='';
                    116: 	}
                    117: 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
1.178     albertel  118: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  119:     } elsif ($target eq 'tex') {
1.360     foxr      120: 
1.190     albertel  121: 	$currentstring = $inside;
1.178     albertel  122: 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
                    123: 	if ($eval eq 'on') {
                    124: 	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
                    125: 	}
1.122     albertel  126: 	if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
1.257     albertel  127: 	# detect simple math mode entry exits, and convert them
1.360     foxr      128:         # to use \ensuremath ... unless there's a \verb inside.
                    129: 	if (! ($currentstring=~/\\verb/)) {
1.395     raeburn   130: 	    if ($currentstring=~/^\s*\$[^\$].*\$\s*$/) {
1.360     foxr      131: 		$currentstring=~s/^(\s*)\$/$1/;
                    132: 		$currentstring=~s/\$(\s*)$/$1/;
                    133: 		$currentstring='\ensuremath{'.$currentstring.'}';
                    134: 	    }
1.257     albertel  135: 	}
1.178     albertel  136: 	$Apache::lonxml::post_evaluate=0;
1.122     albertel  137:     }
                    138:     return $currentstring;
1.33      albertel  139: }
1.122     albertel  140: 
1.33      albertel  141: sub end_m {
1.122     albertel  142:     my ($target,$token) = @_;
                    143:     my $currentstring = '';
1.204     albertel  144:     if ($target eq 'tex') {
1.122     albertel  145: 	$currentstring = "";
                    146:     }
                    147:     return $currentstring;
1.33      albertel  148: }
1.110     albertel  149: 
                    150: sub start_tthoption {
1.299     albertel  151:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  152:     my $result;
1.325     albertel  153:     if ($target eq 'web' || $target eq 'webgrade') {
1.299     albertel  154: 	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
                    155: 						   $style);
1.122     albertel  156: 	$inside=~s/^\s*//;
1.267     albertel  157: 	if ($env{'browser.mathml'}) {
1.122     albertel  158: 	    &tth::ttmoptions($inside);
                    159: 	} else {
                    160: 	    &tth::tthoptions($inside);
                    161: 	}
                    162:     }
                    163:     return $result;
1.110     albertel  164: }
                    165: 
                    166: sub end_tthoption {
1.122     albertel  167:     my ($target,$token) = @_;
                    168:     my $result;
                    169:     return $result;
1.110     albertel  170: }
                    171: 
1.181     sakharuk  172: #-- <html> tag (end tag optional)
1.100     albertel  173: sub start_html {
                    174:     my ($target,$token) = @_;
                    175:     my $currentstring = '';
1.269     albertel  176:     if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
1.327     albertel  177: 	# start_body() takes care of emitting the <html> 
1.100     albertel  178:     } elsif ($target eq 'tex') {
1.391     onken     179: 
1.399     foxr      180: 	$currentstring .= &latex_header();
1.100     albertel  181:     }
                    182:     return $currentstring;
                    183: }
1.122     albertel  184: 
                    185: sub end_html {
1.232     sakharuk  186:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  187:     my $currentstring = '';
1.324     albertel  188:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  189: 	# end_body takes care of the </html>
1.122     albertel  190:     }
                    191:     return $currentstring;
                    192: }
                    193: 
1.181     sakharuk  194: #-- <head> tag (end tag optional)
1.122     albertel  195: sub start_head {
                    196:     my ($target,$token) = @_;
                    197:     my $currentstring = '';
1.324     albertel  198:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  199: 	&Apache::lonxml::startredirection();
1.122     albertel  200:     } 
                    201:     return $currentstring;
                    202: }
                    203: 
                    204: sub end_head {
                    205:     my ($target,$token) = @_;
                    206:     my $currentstring = '';
1.324     albertel  207:     if (($target eq 'web'      && $env{'request.state'} eq 'published') ||
                    208: 	($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
1.327     albertel  209: 	# in case there is a </head> but no <head>
                    210: 	if ($Apache::lonxml::redirection) {
                    211: 	    $Apache::londefdef::head = &Apache::lonxml::endredirection();
                    212: 	}
1.122     albertel  213:     } 
                    214:     return $currentstring;
                    215: }
                    216: 
1.181     sakharuk  217: #-- <map> tag (end tag required)
1.122     albertel  218: sub start_map {
                    219:     my ($target,$token) = @_;
                    220:     my $currentstring = '';
1.325     albertel  221:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  222: 	$currentstring = $token->[4];     
                    223:     } 
                    224:     return $currentstring;
                    225: }
                    226: 
                    227: sub end_map {
                    228:     my ($target,$token) = @_;
                    229:     my $currentstring = '';
1.325     albertel  230:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  231: 	$currentstring = $token->[2];    
                    232:     } 
                    233:     return $currentstring;
                    234: }
                    235: 
1.181     sakharuk  236: #-- <select> tag (end tag required)
1.122     albertel  237: sub start_select {
                    238:     my ($target,$token) = @_;
                    239:     my $currentstring = '';
1.325     albertel  240:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  241: 	$currentstring = $token->[4];     
1.181     sakharuk  242:     }  elsif ($target eq 'tex') {
                    243: 	$Apache::londefdef::select=0;
                    244:     }
1.122     albertel  245:     return $currentstring;
                    246: }
                    247: 
                    248: sub end_select {
                    249:     my ($target,$token) = @_;
                    250:     my $currentstring = '';
1.325     albertel  251:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  252: 	$currentstring = $token->[2];    
                    253:     } 
                    254:     return $currentstring;
                    255: }
                    256: 
1.181     sakharuk  257: #-- <option> tag (end tag optional)
1.122     albertel  258: sub start_option {
1.181     sakharuk  259:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  260:     my $currentstring = '';
1.325     albertel  261:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  262: 	$currentstring = $token->[4];     
1.181     sakharuk  263:     } elsif ($target eq 'tex') {
                    264: 	$Apache::londefdef::select++;
                    265: 	if ($Apache::londefdef::select == 1) {
                    266: 	    $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
                    267: 	} else {
                    268: 	    $currentstring='\keephidden{';
                    269: 	}
                    270:     }
1.122     albertel  271:     return $currentstring;
                    272: }
                    273: 
                    274: sub end_option {
                    275:     my ($target,$token) = @_;
                    276:     my $currentstring = '';
1.325     albertel  277:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  278: 	$currentstring = $token->[2];    
1.181     sakharuk  279:     }  elsif ($target eq 'tex') {
                    280: 	$currentstring='}';
                    281:     }
1.122     albertel  282:     return $currentstring;
                    283: }
                    284: 
1.181     sakharuk  285: #-- <input> tag (end tag forbidden)
1.122     albertel  286: sub start_input {
                    287:     my ($target,$token) = @_;
                    288:     my $currentstring = '';
1.325     albertel  289:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  290: 	$currentstring = $token->[4];     
                    291:     } 
                    292:     return $currentstring;
                    293: }
                    294: 
                    295: sub end_input {
                    296:     my ($target,$token) = @_;
                    297:     my $currentstring = '';
1.325     albertel  298:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  299: 	$currentstring = $token->[2];    
                    300:     } 
                    301:     return $currentstring;
                    302: }
                    303: 
1.181     sakharuk  304: #-- <textarea> tag (end tag required)
1.122     albertel  305: sub start_textarea {
                    306:     my ($target,$token) = @_;
                    307:     my $currentstring = '';
1.325     albertel  308:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  309: 	$currentstring = $token->[4];     
                    310:     } 
                    311:     return $currentstring;
                    312: }
                    313: 
                    314: sub end_textarea {
                    315:     my ($target,$token) = @_;
                    316:     my $currentstring = '';
1.325     albertel  317:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  318: 	$currentstring = $token->[2];    
                    319:     } 
                    320:     return $currentstring;
                    321: }
                    322: 
1.181     sakharuk  323: #-- <form> tag (end tag required)
1.122     albertel  324: sub start_form {
                    325:     my ($target,$token) = @_;
                    326:     my $currentstring = '';
1.325     albertel  327:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  328: 	$currentstring = $token->[4];     
                    329:     } 
                    330:     return $currentstring;
                    331: }
                    332: 
                    333: sub end_form {
                    334:     my ($target,$token) = @_;
                    335:     my $currentstring = '';
1.325     albertel  336:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  337: 	$currentstring = $token->[2];    
                    338:     } 
                    339:     return $currentstring;
                    340: }
                    341: 
1.181     sakharuk  342: #-- <title> tag (end tag required)
1.122     albertel  343: sub start_title {
1.327     albertel  344:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  345:     my $currentstring = '';
1.324     albertel  346:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  347: 	$Apache::londefdef::title = 
                    348: 	    &Apache::lonxml::get_all_text('/title',$parser,$style);
1.122     albertel  349:     } elsif ($target eq 'tex') {
1.166     sakharuk  350: 	$currentstring .= '\keephidden{Title of the document:  ' 
1.122     albertel  351:     }
                    352:     if ($target eq 'meta') {
                    353: 	$currentstring='<title>';
1.185     albertel  354: 	&start_output($target);
1.122     albertel  355:     }
                    356:     return $currentstring;
                    357: }
                    358: 
                    359: sub end_title {
                    360:     my ($target,$token) = @_;
                    361:     my $currentstring = '';
1.324     albertel  362:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  363: 	# start_title takes care of swallowing the title
1.122     albertel  364:     } elsif ($target eq 'tex') {
                    365: 	$currentstring .= '}';
                    366:     }  
                    367:     if ($target eq 'meta') {
1.185     albertel  368: 	&end_output($target);
1.122     albertel  369: 	$currentstring='</title>';
                    370:     } 
                    371:     return $currentstring;
                    372: }
                    373: 
1.181     sakharuk  374: #-- <meta> tag (end tag forbidden)
1.122     albertel  375: sub start_meta {
1.299     albertel  376:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  377:     my $currentstring = '';
1.325     albertel  378:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  379: 	my $args='';
                    380: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    381: 	if ($args eq '') {
1.299     albertel  382: 	    &Apache::lonxml::get_all_text("/meta",$parser,$style);
1.122     albertel  383: 	} else {
                    384: 	    $currentstring = $token->[4];
1.1       sakharuk  385: 	}
1.135     sakharuk  386:     } elsif ($target eq 'meta') {
1.122     albertel  387: 	unless (&Apache::lonxml::get_param
                    388: 		('http-equiv',$parstack,$safeeval,undef,1)) {
                    389: 	    my $name=$token->[2]->{'name'};
                    390: 	    $name=~tr/A-Z/a-z/;
                    391: 	    $name=~s/\s/\_/gs;
                    392: 	    $name=~s/\W//gs;
                    393: 	    if ($name) {
1.154     www       394: 		$currentstring='<'.$name;
                    395:                  my $display=&Apache::lonxml::get_param
                    396: 		('display',$parstack,$safeeval,undef,1);
                    397:                 if ($display) {
                    398:                     $display=~s/\"/\'/g;
                    399: 		    $currentstring.=' display="'.$display.'"';
                    400:                 }
                    401: 		$currentstring.='>'.
1.122     albertel  402: 		    &Apache::lonxml::get_param
                    403: 			('content',$parstack,$safeeval,undef,1).
1.135     sakharuk  404: 			'</'.$name.'>';
1.1       sakharuk  405: 	    }
1.154     www       406:             my $display=&Apache::lonxml::get_param
                    407: 		('display',$parstack,$safeeval,undef,1);
                    408:             if ($display) {
1.204     albertel  409: 		$display=&HTML::Entities::encode($display,'<>&"');
1.154     www       410: 		$currentstring.='<'.$name.'.display>'.$display.
                    411:                                '</'.$name.'.display>';
                    412:             }
1.1       sakharuk  413: 	}
1.135     sakharuk  414:     } elsif ($target eq 'tex') {
1.151     sakharuk  415: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    416: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
                    417: 	if ((not defined $content) && (not defined $name)) {
                    418: 	    &Apache::lonxml::startredirection();
                    419: 	}
1.374     albertel  420:     } elsif ($target eq 'edit') {
                    421: 	$currentstring .= &Apache::edit::tag_start($target,$token);
                    422: 	$currentstring .= &Apache::edit::text_arg('Name:','name',$token,30);
                    423: 	$currentstring .= &Apache::edit::text_arg('Content:','content',$token,70);
                    424: 	$currentstring .= &Apache::edit::end_row();
                    425:     } elsif ($target eq 'modified') {
                    426: 	my $constructtag =
                    427: 	    &Apache::edit::get_new_args($token,$parstack,$safeeval,
                    428: 					'name','content');
                    429: 	if ($constructtag) { $currentstring = &Apache::edit::rebuild_tag($token); }
1.122     albertel  430:     }
                    431:     return $currentstring;
                    432: }
                    433: 
                    434: sub end_meta {
1.165     albertel  435:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  436:     my $currentstring = '';
1.325     albertel  437:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  438: 	my $args='';
                    439: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    440: 	if ($args ne '') {
1.121     www       441: 	    $currentstring = $token->[4];
1.122     albertel  442: 	}
1.135     sakharuk  443:     } elsif ($target eq 'tex') {
1.165     albertel  444: 	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
                    445: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
1.164     albertel  446: 	if ((not defined $content) && (not defined $name)) {
1.169     albertel  447: 	    &Apache::lonxml::endredirection();
1.164     albertel  448: 	}
1.135     sakharuk  449:     }
1.122     albertel  450:     return $currentstring;
                    451: }
                    452: 
1.374     albertel  453: sub insert_meta {
                    454:     return '
                    455:     <meta />';
                    456: }
                    457: 
1.121     www       458: # accessrule
1.122     albertel  459: sub start_accessrule {
1.299     albertel  460:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel  461:     my $currentstring = '';
1.373     albertel  462:     my $eff  =&Apache::lonxml::get_param('effect',$parstack,$safeeval,undef,1);
                    463:     my $realm=&Apache::lonxml::get_param('realm', $parstack,$safeeval,undef,1);
                    464:     my $role =&Apache::lonxml::get_param('role',  $parstack,$safeeval,undef,1);
                    465:     my $type =&Apache::lonxml::get_param('type',  $parstack,$safeeval,undef,1);
                    466: 
                    467:     my ($dom,$crs,$sec,$separator);
1.369     albertel  468:     if ($type eq 'user') {
1.373     albertel  469: 	($dom,$crs,$sec)=split(m{/},$realm);
1.369     albertel  470: 	$crs = &LONCAPA::clean_username($crs);
1.373     albertel  471: 	$separator = '/';
1.369     albertel  472:     } else {
1.373     albertel  473: 	($dom,$crs,$sec)=split(/\_/,$realm);
1.369     albertel  474: 	$crs = &LONCAPA::clean_courseid($crs);
1.373     albertel  475: 	$separator = '_';
1.369     albertel  476:     }
1.373     albertel  477:     $dom = &LONCAPA::clean_domain($dom);
                    478: 
1.369     albertel  479:     $sec =~s/\W//;
                    480:     $realm = $dom;
1.373     albertel  481:     if ($crs =~ /\S/) { $realm .= $separator.$crs; }
                    482:     if ($sec =~ /\S/) { $realm .= $separator.$sec; }
1.369     albertel  483:     $role=~s/\W//g;
                    484: 
1.122     albertel  485:     if ($target eq 'web') {
                    486: 	my $args='';
                    487: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    488: 	if ($args eq '') {
1.299     albertel  489: 	    &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
1.122     albertel  490: 	} else {
                    491: 	    $currentstring = $token->[4];
                    492: 	}
                    493:     }
                    494:     if ($target eq 'meta') {
1.369     albertel  495: 	$currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
1.122     albertel  496:     }
                    497:     return $currentstring;
                    498: }
                    499: 
                    500: sub end_accessrule {
                    501:     my ($target,$token,$tagstack,$parstack,$parser) = @_;
                    502:     my $currentstring = '';
                    503:     if ($target eq 'web') {
                    504: 	my $args='';
                    505: 	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    506: 	if ($args ne '') {
                    507: 	    $currentstring = $token->[4];
                    508: 	}
                    509:     } 
                    510:     return $currentstring;
                    511: }
                    512: 
1.366     albertel  513: sub generate_css_links {
                    514:     my $links;
                    515:     my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
                    516:     if ($css_href =~ /\S/) {
                    517: 	&Apache::lonxml::extlink($css_href);
                    518: 	$links .= 
                    519: 	    '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
                    520:     }
                    521:     return $links;
                    522: }
                    523: 
1.181     sakharuk  524: #-- <body> tag (end tag required)
1.122     albertel  525: sub start_body {
                    526:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                    527:     my $currentstring = '';
1.244     albertel  528: 
1.324     albertel  529:     if ($target eq 'web' || $target eq 'webgrade') {
1.170     albertel  530: 	if ($Apache::lonhomework::parsing_a_problem) {
                    531: 	    &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
                    532: 	    return '';
                    533: 	}
1.122     albertel  534: 	
1.327     albertel  535: 	if (&is_inside_of($tagstack, "head")) {
                    536: 	    &end_head(@_);
1.122     albertel  537: 	}
1.366     albertel  538: 	
                    539: 	my $extra_head = &generate_css_links();
                    540: 
1.406     bisitz    541:     # Breadcrumbs
                    542:     &Apache::lonhtmlcommon::clear_breadcrumbs();
1.410     bisitz    543:     if ($env{'request.state'} eq 'construct') {
                    544:         &Apache::lonhtmlcommon::add_breadcrumb({
                    545:             'text'  => 'Construction Space',
                    546:             'href'  => &Apache::loncommon::authorspace(),
                    547:         });
                    548:         &Apache::lonhtmlcommon::add_breadcrumb({
                    549:             'text'  => 'HTML Editor',
                    550:             'href'  => '',
                    551:         });
1.413     droeschl  552:         # breadcrumbs (and tools) will be created 
                    553:         # in start_page->bodytag->innerregister
1.410     bisitz    554:     } else {
                    555:         # FIXME Where are we?
                    556:     }
1.406     bisitz    557: 
1.327     albertel  558: 	$currentstring = 
                    559: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
1.366     albertel  560: 					   $Apache::londefdef::head
                    561: 					      .$extra_head,
1.327     albertel  562: 					   {'add_entries'    => $token->[2],
1.404     bisitz    563: #					    'no_title'       => 1,
1.327     albertel  564: 					    'force_register' => 1});
                    565: 
1.407     bisitz    566:         my $header = '';
1.411     bisitz    567:         if ($env{'request.state'} ne 'published' &&
                    568:             $env{'request.state'} ne 'construct') {
                    569:             $header=&Apache::lonmenu::constspaceform();
                    570:         }
1.407     bisitz    571:         if ($env{'request.state'} ne 'published') {
1.411     bisitz    572:             $header.=&Apache::londefdef::edit_controls();
1.407     bisitz    573:         }
1.410     bisitz    574:         if ($env{'request.state'} eq 'construct') {
                    575:             $currentstring.=&Apache::loncommon::head_subbox(
                    576:                                 &Apache::loncommon::CSTR_pageheader()
                    577:                                .$header);
1.412     raeburn   578:         } elsif ($env{'request.state'} eq 'edit') {
                    579:             $currentstring.=&Apache::loncommon::head_subbox($header);
1.410     bisitz    580:         }
1.407     bisitz    581:         $currentstring.=&Apache::lonxml::message_location();
1.122     albertel  582:     } elsif ($target eq 'tex') {
1.407     bisitz    583:         $currentstring = '';   #  '\begin{document}' is in header.
                    584:     }
                    585: 
1.122     albertel  586:     return $currentstring;
                    587: }
                    588: 
1.376     albertel  589: sub edit_controls {
1.401     raeburn   590:     my ($nochgview) = @_;
1.389     www       591:     my $result .= '
1.376     albertel  592: <form method="post">
1.401     raeburn   593: <div class="LC_edit_problem_header">';
                    594:     unless ($nochgview) {
                    595:         $result .= '
1.389     www       596: <div class="LC_edit_problem_header_row1">'.
                    597: &Apache::lonxml::renderingoptions().'
                    598: <input type="submit" name="changeproblemmode" value="'.&mt('Change View').'" />
1.401     raeburn   599: </div>';
                    600:     }
                    601:     $result .= '
1.412     raeburn   602: <div><input type="submit" name="editmode" accesskey="e" value="'.&mt('Edit').'" />';
                    603:     if (($env{'request.course.id'}) && ($env{'form.forceedit'})) {
                    604:         $result .= ('&nbsp;' x 3).'<input type="button" value="'.&mt('Course View').'" onclick="javascript:location.href=currentURL" />';
                    605:     }
                    606:     $result .= '</div>
1.408     bisitz    607: </div>
1.376     albertel  608: </form>
1.408     bisitz    609: ';
1.376     albertel  610:     return $result;
                    611: }
                    612: 
1.122     albertel  613: sub end_body {
1.259     albertel  614:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      615:     my $currentstring = &end_p();	# Close off unclosed <p>
1.324     albertel  616:     if ($target eq 'web' || $target eq 'webgrade') {
1.327     albertel  617: 	$currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
1.122     albertel  618:     } elsif ($target eq 'tex') {
1.277     foxr      619: 	$currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';  
1.122     albertel  620:     } 
                    621:     return $currentstring;
                    622: }
                    623: 
1.309     albertel  624: # \begin{center} causes a new paragprah spacing that looks odd inside 
1.337     foxr      625: # of a table cell.  Same at the end of a \center but with a slightly
                    626: # larger space .. hence center_correction and center_end_correction.
                    627: #
                    628: sub center_correction { return '\vspace*{-6 mm}'; } 
                    629: sub center_end_correction { return '\vspace*{-7 mm}'; }
                    630: 
1.181     sakharuk  631: #-- <center> tag (end tag required)
1.122     albertel  632: sub start_center {
1.309     albertel  633:     my ($target,$token,$tagstack) = @_;
1.279     foxr      634:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  635:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr      636: 	$currentstring .= $token->[4];     
1.122     albertel  637:     } elsif ($target eq 'tex') {
1.309     albertel  638: 	if (&is_inside_of($tagstack, "table")) {
                    639: 	    $currentstring .= &center_correction();
                    640: 	}
1.277     foxr      641: 	$currentstring .= '\begin{center}';  
1.144     sakharuk  642:     }
1.122     albertel  643:     return $currentstring;
                    644: }
                    645: 
                    646: sub end_center {
1.309     albertel  647:     my ($target,$token,$tagstack) = @_;
1.122     albertel  648:     my $currentstring = '';
1.325     albertel  649:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  650: 	$currentstring = $token->[2];     
                    651:     } elsif ($target eq 'tex') {
                    652: 	$currentstring = '\end{center}';  
1.337     foxr      653: 	if (&is_inside_of($tagstack, "table")) {
                    654: 	    $currentstring .= &center_end_correction();
                    655: 	}
1.144     sakharuk  656:     }
1.122     albertel  657:     return $currentstring;
                    658: }
                    659: 
1.181     sakharuk  660: #-- <b> tag (end tag required)
1.279     foxr      661: #      NOTE: In TeX mode disables internal <p>
1.122     albertel  662: sub start_b {
                    663:     my ($target,$token) = @_;
                    664:     my $currentstring = '';
1.325     albertel  665:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  666: 	$currentstring = $token->[4];     
                    667:     } elsif ($target eq 'tex') {
1.279     foxr      668: 	&disable_para();
                    669: 	$currentstring .= '\textbf{';  
1.122     albertel  670:     } 
                    671:     return $currentstring;
                    672: }
                    673: 
                    674: sub end_b {
                    675:     my ($target,$token) = @_;
                    676:     my $currentstring = '';
1.325     albertel  677:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  678: 	$currentstring = $token->[2];     
                    679:     } elsif ($target eq 'tex') {
1.279     foxr      680: 	&enable_para();
                    681: 	$currentstring = '}';
1.122     albertel  682:     } 
                    683:     return $currentstring;
                    684: }
1.35      sakharuk  685: 
1.181     sakharuk  686: #-- <strong> tag (end tag required)
1.279     foxr      687: #    NOTE: in TeX mode disables internal <p>
1.122     albertel  688: sub start_strong {
                    689:     my ($target,$token) = @_;
                    690:     my $currentstring = '';
1.325     albertel  691:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  692: 	$currentstring = $token->[4];     
                    693:     } elsif ($target eq 'tex') {
1.279     foxr      694: 	&disable_para();
1.122     albertel  695: 	$currentstring = '\textbf{';  
                    696:     } 
                    697:     return $currentstring;
                    698: }
                    699: 
                    700: sub end_strong {
                    701:     my ($target,$token) = @_;
                    702:     my $currentstring = '';
1.325     albertel  703:     if ($target eq 'web' || $target eq 'webgrade') {	
1.122     albertel  704: 	$currentstring = $token->[2];     
                    705:     } elsif ($target eq 'tex') {
1.279     foxr      706: 	&enable_para();
1.122     albertel  707: 	$currentstring = '}';  
1.144     sakharuk  708:     }
1.122     albertel  709:     return $currentstring;
                    710: }
                    711: 
1.181     sakharuk  712: #-- <h1> tag (end tag required)
1.122     albertel  713: sub start_h1 {
1.125     sakharuk  714:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      715:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  716:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  717: 	$currentstring .= $token->[4];
                    718:     } elsif ($target eq 'tex') {
1.125     sakharuk  719: 	my $pre;
1.199     albertel  720: 	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
1.212     sakharuk  721: 	if ($align eq 'center') {
1.125     sakharuk  722: 	    $pre='\begin{center}';
                    723: 	} elsif ($align eq 'left') {
                    724: 	    $pre='\rlap{';
                    725: 	} elsif ($align eq 'right') {
                    726: 	    $pre=' \hfill \llap{';
                    727: 	}
                    728: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    729: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      730: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  731:     } elsif ($target eq 'meta') {
1.277     foxr      732: 	$currentstring.='<subject>';
1.185     albertel  733: 	&start_output($target);
1.122     albertel  734:     }
                    735:     return $currentstring;
                    736: }
                    737: 
                    738: sub end_h1 {
1.125     sakharuk  739:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  740:     my $currentstring = '';
1.325     albertel  741:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  742: 	$currentstring .= $token->[2];
                    743:     } elsif ($target eq 'tex') {
1.212     sakharuk  744: 	my $post='\vskip 0 mm ';
1.125     sakharuk  745: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  746: 	if ($align eq 'center') {
1.125     sakharuk  747: 	    $post='\end{center}';
                    748: 	} elsif ($align eq 'left') {
                    749: 	    $post='} \hfill'.'\vskip 0 mm ';
                    750: 	} elsif ($align eq 'right') {
                    751: 	    $post='}'.'\vskip 0 mm ';
                    752: 	}
                    753: 	$currentstring .= '}}'.$post;
1.122     albertel  754:     } elsif ($target eq 'meta') {
1.185     albertel  755: 	&end_output($target);
1.122     albertel  756: 	$currentstring='</subject>';
                    757:     } 
                    758:     return $currentstring;
                    759: }
                    760: 
1.35      sakharuk  761: #-- <h2> tag
1.122     albertel  762: sub start_h2 {
1.125     sakharuk  763:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      764:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  765:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  766: 	$currentstring .= $token->[4];
                    767:     } elsif ($target eq 'tex') {
1.125     sakharuk  768: 	my $pre;
                    769: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  770: 	if ($align eq 'center') {
1.125     sakharuk  771: 	    $pre='\begin{center}';
                    772: 	} elsif ($align eq 'left') {
                    773: 	    $pre='\rlap{';
                    774: 	} elsif ($align eq 'right') {
                    775: 	    $pre=' \hfill \llap{';
                    776: 	}
                    777: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    778: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      779: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  780:     } 
                    781:     return $currentstring;
                    782: }
                    783: 
                    784: sub end_h2 {
1.125     sakharuk  785:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  786:     my $currentstring = '';
1.325     albertel  787:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  788: 	$currentstring .= $token->[2];
                    789:     } elsif ($target eq 'tex') {
1.212     sakharuk  790: 	my $post='\vskip 0 mm ';
1.125     sakharuk  791: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  792: 	if ($align eq 'center') {
1.125     sakharuk  793: 	    $post='\end{center}';
                    794: 	} elsif ($align eq 'left') {
                    795: 	    $post='} \hfill'.'\vskip 0 mm ';
                    796: 	} elsif ($align eq 'right') {
                    797: 	    $post='}'.'\vskip 0 mm ';
                    798: 	}
                    799: 	$currentstring .= '}}'.$post;
1.122     albertel  800:     } 
                    801:     return $currentstring;
                    802: }
                    803: 
1.35      sakharuk  804: #-- <h3> tag
1.122     albertel  805: sub start_h3 {
1.125     sakharuk  806:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      807:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  808:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  809: 	$currentstring .= $token->[4];
                    810:     } elsif ($target eq 'tex') {
1.125     sakharuk  811: 	my $pre;
                    812: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  813: 	if ($align eq 'center') {
1.125     sakharuk  814: 	    $pre='\begin{center}';
                    815: 	} elsif ($align eq 'left') {
                    816: 	    $pre='\rlap{';
                    817: 	} elsif ($align eq 'right') {
                    818: 	    $pre=' \hfill \llap{';
                    819: 	}
                    820: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    821: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      822: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  823:     } 
                    824:     return $currentstring;
                    825: }
                    826: 
                    827: sub end_h3 {
1.125     sakharuk  828:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  829:     my $currentstring = '';
1.325     albertel  830:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  831: 	$currentstring .= $token->[2];
                    832:     } elsif ($target eq 'tex') {
1.212     sakharuk  833: 	my $post='\vskip 0 mm ';
1.125     sakharuk  834: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  835: 	if ($align eq 'center') {
1.125     sakharuk  836: 	    $post='\end{center}';
                    837: 	} elsif ($align eq 'left') {
                    838: 	    $post='} \hfill'.'\vskip 0 mm ';
                    839: 	} elsif ($align eq 'right') {
                    840: 	    $post='}'.'\vskip 0 mm ';
                    841: 	}
                    842: 	$currentstring .= '}}'.$post;
1.122     albertel  843:     } 
                    844:     return $currentstring;
                    845: }
                    846: 
1.35      sakharuk  847: #-- <h4> tag
1.122     albertel  848: sub start_h4 {
1.125     sakharuk  849:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      850:     my $currentstring = &end_p();	# Close off any prior para.
1.325     albertel  851:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  852: 	$currentstring .= $token->[4];
                    853:     } elsif ($target eq 'tex') {
1.125     sakharuk  854: 	my $pre;
                    855: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  856: 	if ($align eq 'center') {
1.125     sakharuk  857: 	    $pre='\begin{center}';
                    858: 	} elsif ($align eq 'left') {
                    859: 	    $pre='\rlap{';
                    860: 	} elsif ($align eq 'right') {
                    861: 	    $pre=' \hfill \llap{';
                    862: 	}
                    863: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    864: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      865: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  866:     } 
                    867:     return $currentstring;
                    868: }
                    869: 
                    870: sub end_h4 {
1.125     sakharuk  871:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  872:     my $currentstring = '';
1.325     albertel  873:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  874: 	$currentstring .= $token->[2];
                    875:     } elsif ($target eq 'tex') {
1.212     sakharuk  876: 	my $post='\vskip 0 mm ';
1.125     sakharuk  877: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  878: 	if ($align eq 'center') {
1.125     sakharuk  879: 	    $post='\end{center}';
                    880: 	} elsif ($align eq 'left') {
                    881: 	    $post='} \hfill'.'\vskip 0 mm ';
                    882: 	} elsif ($align eq 'right') {
                    883: 	    $post='}'.'\vskip 0 mm ';
                    884: 	}
                    885: 	$currentstring .= '}}'.$post;
1.122     albertel  886:     } 
                    887:     return $currentstring;
                    888: }
                    889: 
1.35      sakharuk  890: #-- <h5> tag
1.122     albertel  891: sub start_h5 {
1.125     sakharuk  892:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      893:     my $currentstring = &end_p();	# Close off any prior paras.
1.325     albertel  894:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  895: 	$currentstring .= $token->[4];
                    896:     } elsif ($target eq 'tex') {
1.125     sakharuk  897: 	my $pre;
                    898: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  899: 	if ($align eq 'center') {
1.125     sakharuk  900: 	    $pre='\begin{center}';
                    901: 	} elsif ($align eq 'left') {
                    902: 	    $pre='\rlap{';
                    903: 	} elsif ($align eq 'right') {
                    904: 	    $pre=' \hfill \llap{';
                    905: 	}
                    906: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    907: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      908: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  909:     } 
                    910:     return $currentstring;
                    911: }
                    912: 
                    913: sub end_h5 {
1.125     sakharuk  914:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  915:     my $currentstring = '';
1.325     albertel  916:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  917: 	$currentstring .= $token->[2];
                    918:     } elsif ($target eq 'tex') {
1.212     sakharuk  919: 	my $post='\vskip 0 mm ';
1.125     sakharuk  920: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  921: 	if ($align eq 'center') {
1.125     sakharuk  922: 	    $post='\end{center}';
                    923: 	} elsif ($align eq 'left') {
                    924: 	    $post='} \hfill'.'\vskip 0 mm ';
                    925: 	} elsif ($align eq 'right') {
                    926: 	    $post='}'.'\vskip 0 mm ';
                    927: 	}
                    928: 	$currentstring .= '}}'.$post;
1.122     albertel  929:     } 
                    930:     return $currentstring;
                    931: }
                    932: 
1.35      sakharuk  933: #-- <h6> tag
1.122     albertel  934: sub start_h6 {
1.125     sakharuk  935:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr      936:     my $currentstring = &end_p();	# Close off any prior paras.
1.325     albertel  937:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  938: 	$currentstring .= $token->[4];
                    939:     } elsif ($target eq 'tex') {
1.125     sakharuk  940: 	my $pre;
                    941: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  942: 	if ($align eq 'center') {
1.125     sakharuk  943: 	    $pre='\begin{center}';
                    944: 	} elsif ($align eq 'left') {
                    945: 	    $pre='\rlap{';
                    946: 	} elsif ($align eq 'right') {
                    947: 	    $pre=' \hfill \llap{';
                    948: 	}
                    949: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
                    950: 	if (not defined $TeXsize) {$TeXsize="large";}
1.275     foxr      951: 	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 
1.122     albertel  952:     } 
                    953:     return $currentstring;
                    954: }
                    955: 
                    956: sub end_h6 {
1.125     sakharuk  957:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel  958:     my $currentstring = '';
1.325     albertel  959:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  960: 	$currentstring .= $token->[2];
                    961:     } elsif ($target eq 'tex') {
1.212     sakharuk  962: 	my $post='\vskip 0 mm ';
1.125     sakharuk  963: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.212     sakharuk  964: 	if ($align eq 'center') {
1.125     sakharuk  965: 	    $post='\end{center}';
                    966: 	} elsif ($align eq 'left') {
                    967: 	    $post='} \hfill'.'\vskip 0 mm ';
                    968: 	} elsif ($align eq 'right') {
                    969: 	    $post='}'.'\vskip 0 mm ';
                    970: 	}
                    971: 	$currentstring .= '}}'.$post;
1.122     albertel  972:     } 
                    973:     return $currentstring;
                    974: }
                    975: 
1.181     sakharuk  976: #--- <cite> tag (end tag required)
1.122     albertel  977: sub start_cite {
                    978:     my ($target,$token) = @_;
                    979:     my $currentstring = '';
1.325     albertel  980:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  981: 	$currentstring .= $token->[4];
                    982:     } elsif ($target eq 'tex') {
1.179     sakharuk  983: 	$currentstring .= '\textit{';
1.144     sakharuk  984:     }
1.122     albertel  985:     return $currentstring;
                    986: }
                    987: 
                    988: sub end_cite {
                    989:     my ($target,$token) = @_;
                    990:     my $currentstring = '';
1.325     albertel  991:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel  992: 	$currentstring .= $token->[2];
                    993:     } elsif ($target eq 'tex') {
1.179     sakharuk  994: 	$currentstring .= '}';
1.144     sakharuk  995:     }
1.122     albertel  996:     return $currentstring;
                    997: }
                    998: 
1.181     sakharuk  999: #-- <i> tag (end tag required)
1.122     albertel 1000: sub start_i {
                   1001:     my ($target,$token) = @_;
                   1002:     my $currentstring = '';
1.325     albertel 1003:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1004: 	$currentstring .= $token->[4];
                   1005:     } elsif ($target eq 'tex') {
                   1006: 	$currentstring .= '\textit{';
1.144     sakharuk 1007:     }
1.122     albertel 1008:     return $currentstring;
                   1009: }
                   1010: 
                   1011: sub end_i {
                   1012:     my ($target,$token) = @_;
                   1013:     my $currentstring = '';
1.325     albertel 1014:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1015: 	$currentstring .= $token->[2];
                   1016:     } elsif ($target eq 'tex') {
                   1017: 	$currentstring .= '}';
                   1018:     } 
                   1019:     return $currentstring;
                   1020: }
                   1021: 
1.181     sakharuk 1022: #-- <address> tag (end tag required)
1.122     albertel 1023: sub start_address {
                   1024:     my ($target,$token) = @_;
                   1025:     my $currentstring = '';
1.325     albertel 1026:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1027: 	$currentstring .= $token->[4];
                   1028:     } elsif ($target eq 'tex') {
1.179     sakharuk 1029: 	$currentstring .= '\textit{';
1.144     sakharuk 1030:     }
1.122     albertel 1031:     return $currentstring;
                   1032: }
                   1033: 
                   1034: sub end_address {
                   1035:     my ($target,$token) = @_;
                   1036:     my $currentstring = '';
1.325     albertel 1037:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1038: 	$currentstring .= $token->[2];
                   1039:     } elsif ($target eq 'tex') {
1.179     sakharuk 1040: 	$currentstring .= '}';
1.122     albertel 1041:     }
                   1042:     return $currentstring;
                   1043: }
                   1044: 
1.181     sakharuk 1045: #-- <dfn> tag (end tag required)
1.122     albertel 1046: sub start_dfn {
                   1047:     my ($target,$token) = @_;
                   1048:     my $currentstring = '';
1.325     albertel 1049:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1050: 	$currentstring .= $token->[4];
                   1051:     } elsif ($target eq 'tex') {
1.179     sakharuk 1052: 	$currentstring .= '\textit{';
1.122     albertel 1053:     } 
                   1054:     return $currentstring;
                   1055: }
                   1056: 
                   1057: sub end_dfn {
                   1058:     my ($target,$token) = @_;
                   1059:     my $currentstring = '';
1.325     albertel 1060:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1061: 	$currentstring .= $token->[2];
                   1062:     } elsif ($target eq 'tex') {
1.179     sakharuk 1063: 	$currentstring .= '}';
1.144     sakharuk 1064:     }
1.122     albertel 1065:     return $currentstring;
                   1066: }
                   1067: 
1.181     sakharuk 1068: #-- <tt> tag (end tag required)
1.122     albertel 1069: sub start_tt {
                   1070:     my ($target,$token) = @_;
                   1071:     my $currentstring = '';
1.325     albertel 1072:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1073: 	$currentstring .= $token->[4];
                   1074:     } elsif ($target eq 'tex') {
                   1075: 	$currentstring .= '\texttt{';
1.144     sakharuk 1076:     }
1.122     albertel 1077:     return $currentstring;
                   1078: }
                   1079: 
                   1080: sub end_tt {
                   1081:     my ($target,$token) = @_;
                   1082:     my $currentstring = '';
1.325     albertel 1083:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1084: 	$currentstring .= $token->[2];
                   1085:     } elsif ($target eq 'tex') {
                   1086: 	$currentstring .= '}';
                   1087:     }
                   1088:     return $currentstring;
                   1089: }
                   1090: 
1.181     sakharuk 1091: #-- <kbd> tag (end tag required)
1.122     albertel 1092: sub start_kbd {
                   1093:     my ($target,$token) = @_;
                   1094:     my $currentstring = '';
1.325     albertel 1095:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1096: 	$currentstring .= $token->[4];
                   1097:     } elsif ($target eq 'tex') {
1.179     sakharuk 1098: 	$currentstring .= '\texttt{';
1.144     sakharuk 1099:     }
1.122     albertel 1100:     return $currentstring;
                   1101: }
                   1102: 
                   1103: sub end_kbd {
                   1104:     my ($target,$token) = @_;
                   1105:     my $currentstring = '';
1.325     albertel 1106:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1107: 	$currentstring .= $token->[2];
                   1108:     } elsif ($target eq 'tex') {
1.179     sakharuk 1109: 	$currentstring .= '}';
1.144     sakharuk 1110:     }
1.122     albertel 1111:     return $currentstring;
                   1112: }
                   1113: 
1.181     sakharuk 1114: #-- <code> tag (end tag required)
1.122     albertel 1115: sub start_code {
                   1116:     my ($target,$token) = @_;
                   1117:     my $currentstring = '';
1.325     albertel 1118:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1119: 	$currentstring .= $token->[4];
                   1120:     } elsif ($target eq 'tex') {
                   1121: 	$currentstring .= '\texttt{';
                   1122:     } 
                   1123:     return $currentstring;
                   1124: }
                   1125: 
                   1126: sub end_code {
                   1127:     my ($target,$token) = @_;
                   1128:     my $currentstring = '';
1.325     albertel 1129:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1130: 	$currentstring .= $token->[2];
                   1131:     } elsif ($target eq 'tex') {
                   1132: 	$currentstring .= '}';
                   1133:     } 
                   1134:     return $currentstring;
                   1135: }
                   1136: 
1.181     sakharuk 1137: #-- <em> tag (end tag required)
1.122     albertel 1138: sub start_em {
                   1139:     my ($target,$token) = @_;
                   1140:     my $currentstring = '';
1.325     albertel 1141:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1142: 	$currentstring .= $token->[4];
                   1143:     } elsif ($target eq 'tex') {
                   1144: 	$currentstring .= '\emph{';
1.144     sakharuk 1145:     }
1.122     albertel 1146:     return $currentstring;
                   1147: }
                   1148: 
                   1149: sub end_em {
                   1150:     my ($target,$token) = @_;
                   1151:     my $currentstring = '';
1.325     albertel 1152:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1153: 	$currentstring .= $token->[2];
                   1154:     } elsif ($target eq 'tex') {
                   1155: 	$currentstring .= '}';
1.144     sakharuk 1156:     } 
1.122     albertel 1157:     return $currentstring;
                   1158: }
                   1159: 
1.181     sakharuk 1160: #-- <q> tag (end tag required)
1.122     albertel 1161: sub start_q {
                   1162:     my ($target,$token) = @_;
                   1163:     my $currentstring = '';
1.325     albertel 1164:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1165: 	$currentstring .= $token->[4];
                   1166:     } elsif ($target eq 'tex') {
1.179     sakharuk 1167: 	$currentstring .= '\emph{';
1.122     albertel 1168:     }
                   1169:     return $currentstring;
                   1170: }
                   1171: 
                   1172: sub end_q {
                   1173:     my ($target,$token) = @_;
                   1174:     my $currentstring = '';
1.325     albertel 1175:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1176: 	$currentstring .= $token->[2];
                   1177:     } elsif ($target eq 'tex') {
1.179     sakharuk 1178: 	$currentstring .= '}';
1.144     sakharuk 1179:     } 
1.122     albertel 1180:     return $currentstring;
                   1181: }
                   1182: 
1.277     foxr     1183: #  <p> is a bit strange since it does not require a closing </p>
                   1184: #  However in latex, we must often output closing stuff to end
                   1185: #  environments and {}'s etc.  Therefore we do all the work
                   1186: #  of figuring out the ending strings in the start tag processing,
                   1187: #  and provide a mechanism to output the stop text external
                   1188: #  to tag processing.
                   1189: #
                   1190: {
                   1191: 
                   1192:     my $closing_string = '';		# String required to close <p>
                   1193: 
1.279     foxr     1194: #   Some tags are <p> fragile meaning that <p> inside of them
                   1195: #   does not work within TeX mode.  This is managed via the 
                   1196: #   counter below:
                   1197: #
                   1198: 
                   1199:     my $para_disabled = 0;
                   1200: 
                   1201: sub disable_para {
                   1202:     $para_disabled++;
                   1203: }
                   1204: sub enable_para {
                   1205:     $para_disabled--;
                   1206: }
                   1207: 
                   1208: 
1.181     sakharuk 1209: #-- <p> tag (end tag optional)
1.198     sakharuk 1210: #optional attribute - align="center|left|right"
1.122     albertel 1211: sub start_p {
1.157     sakharuk 1212:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1213:     my $currentstring = '';
1.325     albertel 1214:     if ($target eq 'web' || $target eq 'webgrade') {
1.279     foxr     1215: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.122     albertel 1216: 	$currentstring .= $token->[4];
1.279     foxr     1217: 	if (! ($currentstring =~ /\//)) {
                   1218: 	    $closing_string = '</p>'; # Deal correctly with <p /> e.g.
                   1219: 	}
                   1220:     } elsif ($target eq 'tex' && !$para_disabled) {
1.313     foxr     1221: 
1.279     foxr     1222: 	$currentstring .= &end_p();	# close off prior para if in progress.
1.198     sakharuk 1223: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1224: 	if ($align eq 'center') {
1.333     albertel 1225: 	    $currentstring .='\begin{center}\par ';
1.277     foxr     1226: 	    $closing_string = '\end{center}';
1.309     albertel 1227: 	    if (&is_inside_of($tagstack, "table")) {
                   1228: 		$currentstring = &center_correction().$currentstring;
                   1229: 	    }
1.198     sakharuk 1230: 	} elsif ($align eq 'right') {
1.323     foxr     1231: 	    $currentstring.="\n".'{\flushright ';
                   1232: #	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
                   1233: 	    $closing_string= "}\n";
1.198     sakharuk 1234: 	} elsif ($align eq 'left') {
1.323     foxr     1235: 	    $currentstring.= "\n".'{\flushleft ';
                   1236: #	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
                   1237: 	    $closing_string = "}\n";
1.216     matthew  1238: 	} else {
1.277     foxr     1239:             $currentstring.='\par ';
1.313     foxr     1240: 	    if (&is_inside_of($tagstack, 'table')) {
1.315     foxr     1241: 		$closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1.313     foxr     1242: 	    } else {
                   1243: 		$closing_string = '\strut\\\\\strut ';
                   1244: 	    }
1.216     matthew  1245:         }
1.277     foxr     1246: 
1.144     sakharuk 1247:     }
1.122     albertel 1248:     return $currentstring;
                   1249: }
1.277     foxr     1250: #
                   1251: #  End paragraph processing just requires that we output the
                   1252: #  closing string that was saved and blank it.
                   1253: sub end_p {
1.279     foxr     1254:     #  Note only 'tex' mode uses disable_para and enable_para
                   1255:     #  so we don't need to know the target in the check below:
                   1256: 
                   1257:     if (!$para_disabled) {
                   1258: 	my $current_string = $closing_string;
                   1259: 	$closing_string = '';	# Not in a para anymore.
                   1260: 	return $current_string;
                   1261:     } else {
                   1262: 	return '';
                   1263:     }
1.122     albertel 1264: 
                   1265: }
1.277     foxr     1266: }
1.181     sakharuk 1267: #-- <br> tag (end tag forbidden)
1.122     albertel 1268: sub start_br {
                   1269:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1270:     my $currentstring = '';
1.325     albertel 1271:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1272: 	$currentstring .= $token->[4];
                   1273:     } elsif ($target eq 'tex') {
1.227     sakharuk 1274: 	my @tempo=@$tagstack;
1.229     sakharuk 1275: 	my $signal=0;
1.287     foxr     1276: 	#  Not going to factor this to is_inside_of since that would require
                   1277:         #  multiple stack traversals.
                   1278: 	#
1.227     sakharuk 1279: 	for (my $i=$#tempo;$i>=0;$i--) {
                   1280: 	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1.334     albertel 1281:                 ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul'))  {
1.229     sakharuk 1282: 		$signal=1;
1.334     albertel 1283: 	    }
                   1284: 	    if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1.336     foxr     1285: 		$signal = 1;
1.227     sakharuk 1286: 	    }
                   1287: 	}
1.375     foxr     1288: 	if ($signal != 1) {
1.219     sakharuk 1289: 	    $currentstring .= '\strut \\\\ \strut ';
1.1       sakharuk 1290: 	}
1.355     foxr     1291:     
1.144     sakharuk 1292:     }
1.122     albertel 1293:     return $currentstring;
                   1294: }
                   1295: 
                   1296: sub end_br {
                   1297:     my ($target,$token) = @_;
                   1298:     my $currentstring = '';
1.325     albertel 1299:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1300: 	$currentstring .= $token->[2];
                   1301:     }
                   1302:     return $currentstring;
                   1303: }
                   1304: 
1.181     sakharuk 1305: #-- <big> tag (end tag required)
1.122     albertel 1306: sub start_big {
                   1307:     my ($target,$token) = @_;
                   1308:     my $currentstring = '';
1.325     albertel 1309:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1310: 	$currentstring .= $token->[4];
                   1311:     } elsif ($target eq 'tex') {
1.137     sakharuk 1312: 	$currentstring .= '{\large ';
1.144     sakharuk 1313:     } 
1.122     albertel 1314:     return $currentstring;
                   1315: }
                   1316: 
                   1317: sub end_big {
                   1318:     my ($target,$token) = @_;
                   1319:     my $currentstring = '';
1.325     albertel 1320:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1321: 	$currentstring .= $token->[2];
                   1322:     } elsif ($target eq 'tex') {
                   1323: 	$currentstring .= '}';
                   1324:     }
                   1325:     return $currentstring;
                   1326: }
                   1327: 
1.181     sakharuk 1328: #-- <small> tag (end tag required)
1.122     albertel 1329: sub start_small {
                   1330:     my ($target,$token) = @_;
                   1331:     my $currentstring = '';
1.325     albertel 1332:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1333: 	$currentstring .= $token->[4];
                   1334:     } elsif ($target eq 'tex') {
                   1335: 	$currentstring .= '{\footnotesize ';
1.144     sakharuk 1336:     }
1.122     albertel 1337:     return $currentstring;
                   1338: }
                   1339: 
                   1340: sub end_small {
                   1341:     my ($target,$token) = @_;
                   1342:     my $currentstring = '';
1.325     albertel 1343:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1344: 	$currentstring .= $token->[2];
                   1345:     } elsif ($target eq 'tex') {
                   1346: 	$currentstring .= '}';
                   1347:     }
                   1348:     return $currentstring;
                   1349: }
                   1350: 
1.181     sakharuk 1351: #-- <basefont> tag (end tag forbidden)
1.122     albertel 1352: sub start_basefont {
1.126     sakharuk 1353:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.122     albertel 1354:     my $currentstring = '';
1.325     albertel 1355:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1356: 	$currentstring = $token->[4];     
1.126     sakharuk 1357:     } elsif ($target eq 'tex') {
                   1358: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1359: 	if (defined $basesize) {
                   1360: 	    $currentstring = '{\\'.$basesize.' ';
                   1361: 	}
                   1362:     }
1.122     albertel 1363:     return $currentstring;
                   1364: }
                   1365: 
                   1366: sub end_basefont {
1.126     sakharuk 1367:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1368:     my $currentstring = '';
1.325     albertel 1369:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1370: 	$currentstring = $token->[4];     
1.126     sakharuk 1371:     } elsif ($target eq 'tex') {
                   1372: 	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1373: 	if (defined $basesize) {
                   1374: 	    $currentstring = '}';
                   1375: 	}
                   1376:     }
1.122     albertel 1377:     return $currentstring;
                   1378: }
                   1379: 
1.181     sakharuk 1380: #-- <font> tag (end tag required)
1.122     albertel 1381: sub start_font {
                   1382:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1383:     my $currentstring = '';
1.325     albertel 1384:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1385: 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
                   1386: 	$currentstring = $token->[4];     
1.126     sakharuk 1387:     }  elsif ($target eq 'tex') {
                   1388: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1389: 	if (defined $fontsize) {
                   1390: 	    $currentstring = '{\\'.$fontsize.' ';
                   1391: 	}
                   1392:     }
1.122     albertel 1393:     return $currentstring;
                   1394: }
                   1395: 
                   1396: sub end_font {
                   1397:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1398:     my $currentstring = '';
1.325     albertel 1399:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1400: 	$currentstring = $token->[2];    
1.126     sakharuk 1401:     }  elsif ($target eq 'tex') {
                   1402: 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                   1403: 	if (defined $fontsize) {
                   1404: 	    $currentstring = '}';
                   1405: 	}
                   1406:     }
1.122     albertel 1407:     return $currentstring;
                   1408: }
                   1409:  
1.181     sakharuk 1410: #-- <strike> tag (end tag required)
1.122     albertel 1411: sub start_strike {
                   1412:     my ($target,$token) = @_;
                   1413:     my $currentstring = '';
1.325     albertel 1414:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1415: 	$currentstring .= $token->[4];
                   1416:     } elsif ($target eq 'tex') {
                   1417: 	&Apache::lonxml::startredirection();
                   1418:     } 
                   1419:     return $currentstring;
                   1420: }
                   1421: 
                   1422: sub end_strike {
                   1423:     my ($target,$token) = @_;
                   1424:     my $currentstring = '';
1.325     albertel 1425:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1426: 	$currentstring .= $token->[2];
                   1427:     } elsif ($target eq 'tex') {
                   1428: 	$currentstring=&Apache::lonxml::endredirection();
                   1429: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 
                   1430: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/; 
                   1431: 	$currentstring=~s/(\S)\s*$/$1\}/;
                   1432:     }
                   1433:     return $currentstring;
                   1434: }
                   1435: 
1.181     sakharuk 1436: #-- <s> tag (end tag required)
1.122     albertel 1437: sub start_s {
                   1438:     my ($target,$token) = @_;
                   1439:     my $currentstring = '';
1.325     albertel 1440:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1441: 	$currentstring .= $token->[4];
                   1442:     } elsif ($target eq 'tex') {
                   1443: 	&Apache::lonxml::startredirection();
                   1444:     } 
                   1445:     return $currentstring;
                   1446: }
                   1447: 
                   1448: sub end_s {
                   1449:     my ($target,$token) = @_;
                   1450:     my $currentstring = '';
1.325     albertel 1451:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1452: 	$currentstring .= $token->[2];
                   1453:     } elsif ($target eq 'tex') {
                   1454: 	$currentstring=&Apache::lonxml::endredirection();
                   1455: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1456: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1457: 	$currentstring=~s/(\S)\s*$/$1\}/;	
                   1458:     }
                   1459:     return $currentstring;
                   1460: }
                   1461: 
1.181     sakharuk 1462: #-- <sub> tag (end tag required)
1.122     albertel 1463: sub start_sub {
                   1464:     my ($target,$token) = @_;
                   1465:     my $currentstring = '';
1.325     albertel 1466:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1467: 	$currentstring .= $token->[4];
                   1468:     } elsif ($target eq 'tex') {
1.355     foxr     1469: 	$currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1.122     albertel 1470:     } 
                   1471:     return $currentstring;
                   1472: }
                   1473: 
                   1474: sub end_sub {
                   1475:     my ($target,$token) = @_;
                   1476:     my $currentstring = '';
1.325     albertel 1477:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1478: 	$currentstring .= $token->[2];
                   1479:     } elsif ($target eq 'tex') {
1.202     sakharuk 1480: 	$currentstring .= '}}';
1.122     albertel 1481:     }
                   1482:     return $currentstring;
                   1483: }
                   1484: 
1.181     sakharuk 1485: #-- <sup> tag (end tag required)
1.122     albertel 1486: sub start_sup {
                   1487:     my ($target,$token) = @_;
                   1488:     my $currentstring = '';
1.325     albertel 1489:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1490: 	$currentstring .= $token->[4];
                   1491:     } elsif ($target eq 'tex') {
1.355     foxr     1492: 	$currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1.122     albertel 1493:     } 
                   1494:     return $currentstring;
                   1495: }
                   1496: 
                   1497: sub end_sup {
                   1498:     my ($target,$token) = @_;
                   1499:     my $currentstring = '';
1.325     albertel 1500:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1501: 	$currentstring .= $token->[2];
                   1502:     } elsif ($target eq 'tex') {
1.202     sakharuk 1503: 	$currentstring .= '}}';
1.122     albertel 1504:     }
                   1505:     return $currentstring;
                   1506: }
                   1507: 
1.181     sakharuk 1508: #-- <hr> tag (end tag forbidden)
1.122     albertel 1509: sub start_hr {
1.124     sakharuk 1510:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1511:     my $currentstring = &end_p();	# End enclosing para.
1.325     albertel 1512:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1513: 	$currentstring .= $token->[4];
                   1514:     } elsif ($target eq 'tex') {
1.361     foxr     1515: 
                   1516: 	# <hr /> can't be inside of <sup><sub> thank you LaTeX.
                   1517: 	# 
                   1518: 	my $restart_sub = 0;
                   1519: 	my $restart_sup = 0;
                   1520: 
                   1521: 	# Since <sub> and <sup> are simple tags it's ok to turn off/on
                   1522: 	# using the start_ stop_ functions.. those tags only care about
                   1523: 	# $target.
                   1524: 
                   1525: 	if (&is_inside_of($tagstack, "sub")) {
                   1526: 	    $restart_sub = 1;
                   1527: 	    $currentstring .= &end_sub($target, $token, $tagstack, 
                   1528: 				       $parstack, $parser, $safeeval);
                   1529: 	}
                   1530: 	if (&is_inside_of($tagstack, "sup")) {
                   1531: 	    $restart_sup = 1;
                   1532: 	    $currentstring .= &end_sup($target, $token, $tagstack,
                   1533: 				       $parstack, $parser, $safeeval);
                   1534: 	}	
                   1535: 
1.149     sakharuk 1536: 	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.124     sakharuk 1537: 	if (defined $LaTeXwidth) {
                   1538: 	    if ($LaTeXwidth=~/^%/) {
                   1539: 		substr($LaTeXwidth,0,1)='';
                   1540: 		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
                   1541: 	    }
                   1542: 	} else {
1.148     sakharuk 1543: 	    $LaTeXwidth ='0.9\textwidth';
1.124     sakharuk 1544: 	}
                   1545: 	my ($pre,$post);
                   1546: 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
                   1547: 	if (($align eq 'center') || (not defined $align)) {
                   1548: 	    $pre=''; $post='';
                   1549: 	} elsif ($align eq 'left') {
                   1550: 	    $pre='\rlap{'; $post='} \hfill';
                   1551: 	} elsif ($align eq 'right') {
                   1552: 	    $pre=' \hfill \llap{'; $post='}';
                   1553: 	}
1.148     sakharuk 1554: 	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1.124     sakharuk 1555:                                     $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1.361     foxr     1556: 	# Turn stuff back on that we can't be inside of.
                   1557: 
                   1558: 	if ($restart_sub) {
                   1559: 	    $currentstring .= &start_sub($target, $token, $tagstack,
                   1560: 					$parstack, $parser, $safeeval);
                   1561: 	}
                   1562: 	if ($restart_sup) {
                   1563: 	    $currentstring .= &start_sup($target, $token, $tagstack,
                   1564: 					 $parstack, $parser, $safeeval);
                   1565: 	}	
1.122     albertel 1566:     } 
                   1567:     return $currentstring;
                   1568: }
                   1569: 
                   1570: sub end_hr {
                   1571:     my ($target,$token) = @_;
                   1572:     my $currentstring = '';
1.325     albertel 1573:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1574: 	$currentstring .= $token->[2];
1.148     sakharuk 1575:     }
1.122     albertel 1576:     return $currentstring;
                   1577: }
                   1578: 
1.181     sakharuk 1579: #-- <div> tag (end tag required)
1.280     foxr     1580: {
                   1581: 
                   1582: #  Since div can be nested, the stack below is used
                   1583: #  in 'tex' mode to store the ending strings
                   1584: #  for the div stack.
                   1585: 
                   1586:     my @div_end_stack;
                   1587: 
1.122     albertel 1588: sub start_div {
1.280     foxr     1589:     my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1.279     foxr     1590:     my $currentstring = &end_p();	# Close enclosing para.
1.325     albertel 1591:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1592: 	$currentstring .= $token->[4];
                   1593:     } 
1.280     foxr     1594:     if ($target eq 'tex') {
                   1595: 	# 4 possible alignments: left, right, center, and -missing-.
1.380     foxr     1596:         # If inside a table row, we must let the table logic
                   1597: 	# do the alignment, however.
                   1598: 	# 
1.280     foxr     1599: 
                   1600: 	my $endstring = '';
                   1601: 
                   1602: 	my $align = lc(&Apache::lonxml::get_param('align', $parstack,
                   1603: 						  $safeeval, undef, 1));
                   1604: 	if ($align eq 'center') {
                   1605: 	    $currentstring .= '\begin{center}';
                   1606: 	    $endstring      = '\end{center}';
1.309     albertel 1607: 	    if (&is_inside_of($tagstack, "table")) {
                   1608: 		$currentstring = &center_correction().$currentstring;
1.380     foxr     1609: 		$endstring    .= &center_end_correction(); 
1.309     albertel 1610: 	    }
1.280     foxr     1611: 	}
                   1612: 	elsif ($align eq 'right') {
                   1613: 	    $currentstring .= '\begin{flushright}';
                   1614: 	    $endstring     .= '\end{flushright}';
                   1615: 	} elsif ($align eq 'left') {
                   1616: 	    $currentstring .= '\begin{flushleft}';
                   1617: 	    $endstring     = '\end{flushleft}';
                   1618: 	} else {
                   1619: 	
                   1620: 	}
                   1621: 	$currentstring .= "\n";   # For human readability.
                   1622: 	$endstring       = "\n$endstring\n"; # For human readability
                   1623: 	push(@div_end_stack, $endstring);
                   1624:     }
1.122     albertel 1625:     return $currentstring;
                   1626: }
                   1627: 
                   1628: sub end_div {
                   1629:     my ($target,$token) = @_;
                   1630:     my $currentstring = '';
1.325     albertel 1631:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1632: 	$currentstring .= $token->[2];
1.280     foxr     1633:     }
                   1634:     if ($target eq 'tex') {
                   1635: 	my $endstring = pop @div_end_stack;
                   1636: 	$currentstring .= $endstring;
                   1637:     }
1.122     albertel 1638:     return $currentstring;
                   1639: }
1.280     foxr     1640: }
1.122     albertel 1641: 
1.181     sakharuk 1642: #-- <a> tag (end tag required)
1.122     albertel 1643: sub start_a {
1.149     sakharuk 1644:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1645:     my $currentstring = '';
1.325     albertel 1646:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 1647: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   1648: 					    undef,1);
                   1649: 	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1.400     raeburn  1650:         if ($href =~ /\S/) {
                   1651:             if ($href !~ m{^https?://}) {
                   1652:                 my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
                   1653:                 my $linkurl;
                   1654:                 if ($href =~ m{^/uploaded/}) {
                   1655:                     $linkurl = $href;
                   1656:                 } elsif ($href =~ m{^[^/]}) {
                   1657:                     my $path = $url;
                   1658:                     $path  =~ s{[^/]*$}{};
                   1659:                     $linkurl = $path.$href;
                   1660:                 }
                   1661:                 if ($linkurl =~ m{^/uploaded/}) {
                   1662:                     if (!&Apache::lonnet::allowed('bre',$linkurl)) {
                   1663:                         if (&Apache::lonnet::is_on_map($url)) {
                   1664:                             &Apache::lonxml::extlink($linkurl);
                   1665:                         }
                   1666:                     }
                   1667:                 }
                   1668:             }
                   1669:         }
1.122     albertel 1670:     }
                   1671:     return $currentstring;
                   1672: }
                   1673: 
                   1674: sub end_a {
1.168     albertel 1675:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1676:     my $currentstring = '';
1.325     albertel 1677:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1678: 	$currentstring .= $token->[2];
                   1679:     }
1.351     foxr     1680:     if ($target eq 'tex') {
1.352     albertel 1681: 	my $href =
                   1682: 	    &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
                   1683: 	my $name =
                   1684: 	    &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1.382     www      1685:         my $uriprint =
                   1686:             &Apache::lonxml::get_param('uriprint',$parstack,$safeeval,undef,1);
                   1687:         my $anchorprint =
                   1688:             &Apache::lonxml::get_param('anchorprint',$parstack,$safeeval,undef,1);
                   1689: 	if (($href =~ /\S/) && ($uriprint=~/^on|uriprint|yes|1$/i)) {
1.352     albertel 1690: 	    $href =~ s/([^\\])%/$1\\\%/g;
1.365     foxr     1691: 	    # Substitute special symbols... and allow line breaks at each /
                   1692: 	    #
                   1693: 	    $href = &Apache::lonxml::latex_special_symbols($href);
                   1694: 	    $href =~ s/\//\/\\-/g;              # Map / to /\- to allow hyphenation.
                   1695: 	    $currentstring .= ' ({\tt URI:'.$href.'})';
1.382     www      1696: 	} elsif (($name =~ /\S/) && ($anchorprint=~/^on|anchorprint|yes|1$/i)) {
1.352     albertel 1697: 	    $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1.351     foxr     1698: 	} else {
                   1699: 	    $currentstring.='';
                   1700: 	}	
                   1701:     }
1.122     albertel 1702:     return $currentstring;
                   1703: }
                   1704: 
1.181     sakharuk 1705: #-- <li> tag (end tag optional)
1.122     albertel 1706: sub start_li {
1.168     albertel 1707:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 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') {
1.237     sakharuk 1712: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1713: 	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1.238     albertel 1714: 	#FIXME need to support types i and I 
                   1715: 	if ($type=~/disc/) {
                   1716: 	    $currentstring .= ' \item[$\bullet$] ';
                   1717: 	} elsif ($type=~/circle/) {
                   1718: 	    $currentstring .= ' \item[$\circ$] ';
1.146     sakharuk 1719: 	} elsif ($type=~/square/) {
1.238     albertel 1720: 	    $currentstring .= ' \item[$\diamond$] ';
                   1721: 	} elsif ($type eq '1') {
                   1722: 	    $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1.237     sakharuk 1723: 	} elsif ($type eq 'A') {
1.238     albertel 1724: 	    $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1725: 	} elsif ($type eq 'a') {
1.238     albertel 1726: 	    $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1.237     sakharuk 1727: 	} elsif ($value ne '') {
                   1728: 	    $currentstring .= ' \item['.$value.'] ';
1.122     albertel 1729: 	} else {
1.146     sakharuk 1730: 	    $currentstring .= ' \item ';
1.122     albertel 1731: 	}  
1.238     albertel 1732: 	$Apache::londefdef::list_index++;
                   1733:     }
1.122     albertel 1734:     return $currentstring;
                   1735: }
                   1736: 
                   1737: sub end_li {
                   1738:     my ($target,$token) = @_;
1.279     foxr     1739:     my $currentstring = &end_p();	# In case there's a <p> in the <li>
1.325     albertel 1740:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1741: 	$currentstring .= $token->[2];     
1.122     albertel 1742:     } 
                   1743:     return $currentstring;
                   1744: }
                   1745: 
1.181     sakharuk 1746: #-- <u> tag (end tag required)
1.122     albertel 1747: sub start_u {
                   1748:     my ($target,$token) = @_;
                   1749:     my $currentstring = '';
1.325     albertel 1750:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1751: 	$currentstring .= $token->[4];
                   1752:     } elsif ($target eq 'tex') {
                   1753: 	&Apache::lonxml::startredirection();
                   1754:     } 
                   1755:     return $currentstring;
                   1756: }
                   1757: 
                   1758: sub end_u {
                   1759:     my ($target,$token) = @_;
                   1760:     my $currentstring = '';
1.325     albertel 1761:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1762: 	$currentstring .= $token->[2];
                   1763:     } elsif ($target eq 'tex') {
                   1764: 	$currentstring=&Apache::lonxml::endredirection();
                   1765: 	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
                   1766: 	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
                   1767: 	$currentstring=~s/(\S)\s*$/$1\}/;		
                   1768:     }
                   1769:     return $currentstring;
                   1770: }
                   1771: 
1.181     sakharuk 1772: #-- <ul> tag (end tag required)
1.122     albertel 1773: sub start_ul {
1.125     sakharuk 1774:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1775:     my $currentstring = &end_p();	# Close off enclosing list.
1.325     albertel 1776:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1777: 	$currentstring .= $token->[4];     
1.122     albertel 1778:     } elsif ($target eq 'tex') {
1.125     sakharuk 1779: 	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1.238     albertel 1780: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1781: 	if ($TeXtype eq 'disc') {
1.222     sakharuk 1782: 	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                   1783:                               '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1784:                               '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1785:                               '\renewcommand{\labelitemiv}{$\bullet$}';
1.125     sakharuk 1786: 	} elsif ($TeXtype eq 'circle') {
1.222     sakharuk 1787: 	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                   1788:                               '\renewcommand{\labelitemii}{$\circ$}'. 
                   1789:                               '\renewcommand{\labelitemiii}{$\circ$}'.
                   1790:                               '\renewcommand{\labelitemiv}{$\circ$}';
1.125     sakharuk 1791: 	} elsif ($TeXtype eq 'square') {
1.222     sakharuk 1792: 	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                   1793:                               '\renewcommand{\labelitemii}{$\diamond$}'. 
                   1794:                               '\renewcommand{\labelitemiii}{$\diamond$}'.
                   1795:                               '\renewcommand{\labelitemiv}{$\diamond$}';
1.125     sakharuk 1796: 	}
1.222     sakharuk 1797: 	$currentstring .= '\strut \begin{itemize}';  
1.122     albertel 1798:     } 
                   1799:     return $currentstring;
                   1800: }
                   1801: 
                   1802: sub end_ul {
                   1803:     my ($target,$token) = @_;
                   1804:     my $currentstring = '';
1.325     albertel 1805:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1806: 	$currentstring = $token->[2];     
                   1807:     } elsif ($target eq 'tex') {
1.222     sakharuk 1808: 	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                   1809:                                '\renewcommand{\labelitemii}{$\bullet$}'. 
                   1810:                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                   1811:                                '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
1.122     albertel 1812:     } 
                   1813:     return $currentstring;
                   1814: }
                   1815: 
1.181     sakharuk 1816: #-- <menu> tag (end tag required)
1.122     albertel 1817: sub start_menu {
                   1818:     my ($target,$token) = @_;
                   1819:     my $currentstring = '';
1.325     albertel 1820:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1821: 	$currentstring = $token->[4];     
                   1822:     } elsif ($target eq 'tex') {
                   1823: 	$currentstring = " \\begin{itemize} ";  
                   1824:     } 
                   1825:     return $currentstring;
                   1826: }
                   1827: 
                   1828: sub end_menu {
                   1829:     my ($target,$token) = @_;
                   1830:     my $currentstring = '';
1.325     albertel 1831:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1832: 	$currentstring = $token->[2];     
                   1833:     } elsif ($target eq 'tex') {
                   1834: 	$currentstring = " \\end{itemize}";  
                   1835:     } 
                   1836:     return $currentstring;
                   1837: }
                   1838: 
1.181     sakharuk 1839: #-- <dir> tag (end tag required)
1.122     albertel 1840: sub start_dir {
                   1841:     my ($target,$token) = @_;
1.279     foxr     1842:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.325     albertel 1843:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1844: 	$currentstring .= $token->[4];     
1.122     albertel 1845:     } elsif ($target eq 'tex') {
1.277     foxr     1846: 	$currentstring .= " \\begin{itemize} ";  
1.122     albertel 1847:     } 
                   1848:     return $currentstring;
                   1849: }
                   1850: 
                   1851: sub end_dir {
                   1852:     my ($target,$token) = @_;
                   1853:     my $currentstring = '';
1.325     albertel 1854:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1855: 	$currentstring = $token->[2];     
                   1856:     } elsif ($target eq 'tex') {
                   1857: 	$currentstring = " \\end{itemize}";  
                   1858:     } 
                   1859:     return $currentstring;
                   1860: }
                   1861: 
1.181     sakharuk 1862: #-- <ol> tag (end tag required)
1.122     albertel 1863: sub start_ol {
1.125     sakharuk 1864:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     1865:     my $currentstring = &end_p();	# In case there's a <p> prior to the list.
1.325     albertel 1866:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1867: 	$currentstring .= $token->[4];     
1.122     albertel 1868:     } elsif ($target eq 'tex') {
1.238     albertel 1869: 	$Apache::londefdef::list_index=0;
1.125     sakharuk 1870: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
                   1871: 	if ($type eq '1') {
1.222     sakharuk 1872: 	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1873:                               '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                   1874:                               '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1875:                               '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1.125     sakharuk 1876: 	} elsif ($type eq 'A') {
1.222     sakharuk 1877: 	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                   1878:                               '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                   1879:                               '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                   1880:                               '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1.125     sakharuk 1881: 	} elsif ($type eq 'a') {
1.222     sakharuk 1882: 	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                   1883:                               '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                   1884:                               '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                   1885:                               '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1.125     sakharuk 1886: 	} elsif ($type eq 'i') {
1.222     sakharuk 1887: 	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                   1888:                               '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                   1889:                               '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                   1890:                               '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1.125     sakharuk 1891: 	} elsif ($type eq 'I') {
1.222     sakharuk 1892: 	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                   1893:                               '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                   1894:                               '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                   1895:                               '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1.125     sakharuk 1896: 	}
1.222     sakharuk 1897: 	$currentstring .= '\strut \begin{enumerate}';  
1.122     albertel 1898:     } 
                   1899:     return $currentstring;
                   1900: }
                   1901: 
                   1902: sub end_ol {
                   1903:     my ($target,$token) = @_;
                   1904:     my $currentstring = '';
1.325     albertel 1905:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1906: 	$currentstring = $token->[2];     
                   1907:     } elsif ($target eq 'tex') {
1.222     sakharuk 1908: 	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                   1909:                                         '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                   1910:                                         '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                   1911:                                         '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
1.122     albertel 1912:     } 
                   1913:     return $currentstring;
                   1914: }
                   1915: 
1.181     sakharuk 1916: #-- <dl> tag (end tag required)
1.122     albertel 1917: sub start_dl {
                   1918:     my ($target,$token) = @_;
1.279     foxr     1919:     my $currentstring = &end_p();	# In case there's a <p> unclosed prior to the list.
1.325     albertel 1920:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     1921: 	$currentstring .= $token->[4];     
1.122     albertel 1922:     } elsif ($target eq 'tex') {
1.277     foxr     1923: 	$currentstring .= '\begin{description}';
1.243     albertel 1924: 	$Apache::londefdef::DL++;
                   1925: 	push(@Apache::londefdef::description,[]);
                   1926: 	$Apache::londefdef::DD[$Apache::londefdef::DL]=0;
                   1927: 	$Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1.244     albertel 1928: 	$Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1.122     albertel 1929:     } 
                   1930:     return $currentstring;
                   1931: }
                   1932: 
                   1933: sub end_dl {
1.174     sakharuk 1934:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1935:     my $currentstring = '';
1.325     albertel 1936:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1937: 	$currentstring = $token->[2];     
                   1938:     } elsif ($target eq 'tex') {
1.243     albertel 1939: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1940: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
                   1941: 	foreach my $element (@{$Apache::londefdef::description[-1]}) {
1.174     sakharuk 1942: 	    $currentstring.=' '.$element.' ';
                   1943: 	}
1.243     albertel 1944: 	pop(@Apache::londefdef::description);
1.174     sakharuk 1945: 	$currentstring.='\end{description}';  
1.243     albertel 1946: 	delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
                   1947: 	delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1.244     albertel 1948: 	delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1.243     albertel 1949: 	$Apache::londefdef::DL--;
1.122     albertel 1950:     } 
                   1951:     return $currentstring;
                   1952: }
                   1953: 
1.172     sakharuk 1954: #-- <dt> tag (end tag optional)
1.122     albertel 1955: sub start_dt {
1.172     sakharuk 1956:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   1957:     my $currentstring='';
1.325     albertel 1958:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1959: 	$currentstring = $token->[4];     
                   1960:     } elsif ($target eq 'tex') {
1.243     albertel 1961: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   1962: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1.174     sakharuk 1963: 	&Apache::lonxml::startredirection();
1.243     albertel 1964: 	$Apache::londefdef::DT[-1]++;
1.244     albertel 1965: 	$Apache::londefdef::seenDT[-1]=1;
1.122     albertel 1966:     } 
                   1967:     return $currentstring;
                   1968: }
                   1969: 
                   1970: sub end_dt {
1.172     sakharuk 1971:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1972:     my $currentstring = '';
1.325     albertel 1973:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1974: 	$currentstring = $token->[2];    
                   1975:     } elsif ($target eq 'tex') {
1.243     albertel 1976: 	if ($Apache::londefdef::DT[-1]) {
                   1977: 	    my $data=&item_cleanup();
1.244     albertel 1978: 	    push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1.243     albertel 1979: 	    $Apache::londefdef::DT[-1]--;
                   1980: 	}
1.122     albertel 1981:     } 
                   1982:     return $currentstring;
                   1983: }
                   1984: 
1.173     sakharuk 1985: sub item_cleanup {
1.174     sakharuk 1986:     my $item=&Apache::lonxml::endredirection();
1.173     sakharuk 1987:     $item=~s/\\begin{center}//g;
                   1988:     $item=~s/\\end{center}//g;
                   1989:     return $item;
                   1990: }
                   1991: 
1.181     sakharuk 1992: #-- <dd> tag (end tag optional)
1.122     albertel 1993: sub start_dd {
1.147     sakharuk 1994:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 1995:     my $currentstring = '';
1.325     albertel 1996:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 1997: 	$currentstring = $token->[4];     
1.147     sakharuk 1998:     } elsif ($target eq 'tex') {
1.243     albertel 1999: 	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
                   2000: 	if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1.244     albertel 2001: 	if (!$Apache::londefdef::seenDT[-1]) {
                   2002: 	    push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
                   2003: 	}
1.243     albertel 2004: 	push(@{$Apache::londefdef::description[-1]},'');
                   2005: 	$Apache::londefdef::description[-1]->[-1].=' \strut ';
                   2006: 	$Apache::londefdef::DD[-1]++;
1.174     sakharuk 2007: 	&Apache::lonxml::startredirection();
1.122     albertel 2008:     } 
                   2009:     return $currentstring;
                   2010: }
                   2011: 
                   2012: sub end_dd {
1.174     sakharuk 2013:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2014:     my $currentstring = '';
1.325     albertel 2015:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2016: 	$currentstring = $token->[2];    
1.174     sakharuk 2017:     }  elsif ($target eq 'tex') {
1.243     albertel 2018: 	$Apache::londefdef::description[-1]->[-1].=
                   2019: 	    &Apache::lonxml::endredirection().' \vskip 0mm ';
                   2020: 	$Apache::londefdef::DD[-1]--;
1.174     sakharuk 2021:     }
1.122     albertel 2022:     return $currentstring;
                   2023: }
                   2024: 
1.181     sakharuk 2025: #-- <table> tag (end tag required)
1.277     foxr     2026: #       <table> also ends any prior <p> that is not closed.
                   2027: #               but, unless I allow <p>'s to nest, that's the
                   2028: #               only way I could think of to allow <p> in 
                   2029: #               <tr> <th> bodies
                   2030: #
1.398     foxr     2031: #list of supported attributes: border,width,TeXwidth,TeXtheme
                   2032: #                              align
1.91      sakharuk 2033: sub start_table {
                   2034:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.277     foxr     2035:     my $textwidth = '';
1.279     foxr     2036:     my $currentstring = &end_p();
1.325     albertel 2037:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2038: 	$currentstring .= $token->[4];     
1.91      sakharuk 2039:     } elsif ($target eq 'tex') {
1.396     foxr     2040: 	&disable_para();	# Can't have paras in a table.
1.398     foxr     2041: 
                   2042: 
                   2043: 	#  New table code:
                   2044: 
                   2045: 	#  Get the parameters that we can do something about:
                   2046: 
                   2047: 	my $border = &Apache::lonxml::get_param('border', $parstack, $safeeval, undef, 0);
                   2048: 	my $width  = &Apache::lonxml::get_param('TeXwidth', $parstack, $safeeval, undef, 0);
                   2049: 	my $theme  = &Apache::lonxml::get_param('TeXtheme', $parstack, $safeeval, undef, 0);
                   2050: 	my $align  = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 0);
1.420     foxr     2051: 	my $cell_border = &Apache::lonxml::get_param('rules', $parstack, $safeeval, undef, 0);
1.398     foxr     2052: 
                   2053: 	# The only thing that needs any figuring out is the width.. and then only if it is
                   2054: 	# a percent. If not it's assumed to be some valid TeX measurement unit e.g. 3.0cm
                   2055: 	#
                   2056: 
                   2057: 	my $table = new Apache::lontable();
1.420     foxr     2058: 	if ((defined $border) && ($border > 0)) {
1.421     raeburn  2059: 	#    &Apache::lonnet::logthis("Turning on table borders: $border");
1.398     foxr     2060: 	    $table->table_border(1);
1.420     foxr     2061: 	    if ($cell_border ne 'none') {
                   2062: 		$table->cell_border(1); # html specs that border turns on both...unless rules='none'.
                   2063: 	    }
                   2064: 	}
                   2065: 	# Only all or nothing for cell borders for now:
                   2066: 
                   2067: 	if ((defined $cell_border) && ($cell_border ne 'none')) {
1.421     raeburn  2068: 	#    &Apache::lonnet::logthis("Turning on cell borders: $cell_border");
1.398     foxr     2069: 	    $table->cell_border(1);
                   2070: 	}
1.420     foxr     2071: 	if (defined $theme) {
1.398     foxr     2072: 	    $table->theme($theme);
                   2073: 	}
1.420     foxr     2074: 	if (defined $align) {
1.398     foxr     2075: 	    $table->alignment($align);
                   2076: 	}
                   2077: 
                   2078: 	# Missing width is most of page width
                   2079: 
1.420     foxr     2080: 	if (!(defined $width)) {
1.398     foxr     2081: 	    $width = '70%';
                   2082: 	}
1.420     foxr     2083: 
1.398     foxr     2084: 	# If a percentage, need to calculate what this means in terms of
                   2085: 	# page width:
                   2086: 	
                   2087: 	if ($width =~ /%$/) {
                   2088: 	    my $textwidth = &recalc($env{'form.textwidth'});  # Page width in mm.
                   2089: 	    $width =~ s/%//;
                   2090: 	    $width = $width * $textwidth / 100.0;
                   2091: 	    $width .= " mm";
                   2092: 	    $table->width($width);
                   2093: 	}
                   2094: 
                   2095: 	push(@Apache::londefdef::table, $table);
                   2096:         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
                   2097: 
                   2098: 	#--------------------------------------------------------
                   2099: 	#  Old table code here.
                   2100: 	#--------------------------------------------------------
                   2101: 
                   2102: 
                   2103: 	if (0) {
1.344     albertel 2104: 	push(@Apache::londefdef::table, {}); 
1.91      sakharuk 2105: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 2106:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 2107: 	if ($#Apache::londefdef::table==0) {
1.267     albertel 2108: 	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1.206     sakharuk 2109: 	    $textwidth=~/(\d+\.?\d*)/;
1.358     foxr     2110: 	    $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
1.206     sakharuk 2111: 	} else {
                   2112: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   2113: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   2114: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   2115: 	    } else {
                   2116:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 2117: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 2118: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   2119: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   2120: 		}
                   2121: 	    }
                   2122: 	}
1.294     foxr     2123: 
                   2124: 	# width either comes forced from the TeXwidth or the width parameters.
                   2125: 	# in either case it can be a percentage or absolute width.
1.311     albertel 2126: 	# in the width case we ignore absolute width 
1.126     sakharuk 2127: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.308     albertel 2128: 	if (!defined($TeXwidth)) {
1.311     albertel 2129: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
                   2130: 						       $safeeval,undef,1);
                   2131: 	    if ($htmlwidth =~ /%/) {
                   2132: 		$TeXwidth = $htmlwidth;
                   2133: 	    } else { 
                   2134: 		$TeXwidth = $textwidth;
                   2135: 	    }
1.364     foxr     2136: 	}
                   2137: 	# if the width is specified as a % it is converted to an absolute width.
                   2138: 	# otherwise.. just plugged right in the hash
                   2139: 
1.294     foxr     2140: 	if ($TeXwidth=~/%/) {
1.126     sakharuk 2141: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 2142:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 2143: 	} else {
1.206     sakharuk 2144: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.316     foxr     2145: 	}
                   2146:         #  In the end, however the table width cannot be wider than $textwidth...
                   2147: 	
                   2148: 	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
                   2149: 	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
                   2150: 	}
1.126     sakharuk 2151:         #table's border
1.206     sakharuk 2152: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 2153:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 2154: 	unless (defined $border) { $border = 0; }
                   2155: 	if ($border) { 
                   2156: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   2157: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2158: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   2159: 	} else {
                   2160: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   2161: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2162: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   2163: 	}
1.206     sakharuk 2164: 	if ($#Apache::londefdef::table==0) {
1.281     foxr     2165: 	    #    Note that \newline seems to destroy the alignment envs.
                   2166: 	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
                   2167: 	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 2168: 	}
                   2169: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   2170:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   2171:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 2172:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 2173:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   2174:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   2175:         $Apache::londefdef::table[-1]{'content'}=[];
                   2176:         $Apache::londefdef::table[-1]{'align'}=[];
1.340     foxr     2177:         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
1.398     foxr     2178:     }
1.294     foxr     2179: 
                   2180:     }
1.91      sakharuk 2181:     return $currentstring;
                   2182: }
1.122     albertel 2183:  
                   2184: sub end_table {
                   2185:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2186:     my $currentstring = '';
1.325     albertel 2187:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2188: 	$currentstring = $token->[2];     
                   2189:     } elsif ($target eq 'tex') {
1.398     foxr     2190: 
                   2191: 
                   2192: 	#  New table code:
                   2193: 
                   2194: 	my $table = pop(@Apache::londefdef::table);
                   2195: 	my $t     = $table->generate();
1.422   ! foxr     2196: 	&Apache::lonnet::logthis("Generating string");
1.398     foxr     2197: 	$currentstring = $t->generate_string();
1.422   ! foxr     2198: 	&Apache::lonnet::logthis("Generated: $currentstring");
1.398     foxr     2199: 	&enable_para();
                   2200: 	#--------------------------------------------------------------
                   2201: 	#  Old table code:
                   2202: 	#--------------------------------------------------------------
                   2203: 
                   2204: 	if (0) {
                   2205: 
1.372     foxr     2206: 	my $border =  &Apache::lonxml::get_param('border',$parstack,$safeeval);
1.122     albertel 2207: 	my $inmemory = '';
                   2208: 	my $output = '';
1.206     sakharuk 2209: 	my $WARNING='';
                   2210:         #width of columns from TeXwidth attributes
1.294     foxr     2211: 
1.384     foxr     2212: 	# Protect against unbalanced </table> tag.
                   2213: 
                   2214: 	if (scalar(@Apache::londefdef::table) > 0) {
                   2215: 
1.206     sakharuk 2216: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2217: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2218: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   2219: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   2220: 		}	
                   2221: 	    }
                   2222: 	}
                   2223:         #free space and number of empty columns
                   2224: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 2225: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 2226: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2227: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   2228: 		$empty_columns++;
                   2229: 	    } else {
                   2230: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   2231: 	    }
                   2232: 	}
1.358     foxr     2233: 
1.206     sakharuk 2234:         #boundaries for contents columns
                   2235: 	my @min_len=();#columns can not be narrower 
                   2236: 	my @max_len=();#maximum length of column
1.357     foxr     2237: 	my $avg_max;
                   2238: 	my $avg_min;
                   2239: 	my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
                   2240: 	for (my $jn=0;$jn<=$counter_cols; $jn++) {
1.206     sakharuk 2241: 		my ($localmin,$localmax)=(0,0);
                   2242: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2243: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   2244: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   2245: 		    }
                   2246: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   2247: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   2248: 		    }
                   2249: 		}
                   2250: 		push @min_len, $localmin;
                   2251: 		push @max_len, $localmax;
1.357     foxr     2252: 		$avg_max = $localmax + $avg_max;
                   2253: 		$avg_min = $localmin + $avg_min;
                   2254: 	}
                   2255: 	# Does not really matter what the average max/min are if there are no cols.
                   2256: 	# and this prevents div 0 in that case.
                   2257: 
                   2258: 	if ($counter_cols != 0) {
                   2259: 	    $avg_max = $avg_max/$counter_cols;
                   2260: 	    $avg_min = $avg_min/$counter_cols;
                   2261: 	}
                   2262: 
                   2263: 
                   2264: 	#  I don't think the below is needed.. but just in case:
                   2265: 
                   2266: 	if ($avg_min > $avg_max) {
                   2267: 	    my $temp = $avg_min;
                   2268: 	    $avg_min = $avg_max;
                   2269: 	    $avg_max = $temp;
1.122     albertel 2270: 	}
1.357     foxr     2271: 
                   2272: 
                   2273: 	for (my $jn=0;$jn<=$counter_cols;$jn++) {
1.206     sakharuk 2274: 	    my $localmin=0,;
                   2275: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2276: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   2277: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   2278: 		}
                   2279: 	    }
1.229     sakharuk 2280: 	    if ($max_len[$jn]<$localmin) {
                   2281: 		$max_len[$jn]=$localmin;
                   2282: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2283: 	    }#object size is bigger
                   2284: 	    if ($min_len[$jn]<$localmin) {
                   2285: 		$min_len[$jn]=$localmin;
                   2286: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2287: 	    }#object size is bigger
1.206     sakharuk 2288: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   2289: 		$min_len[$jn]=0;
                   2290: 		$max_len[$jn]=0;
                   2291: 	    }
1.357     foxr     2292: 	    #  Spans seem to be really bothered by max/min = 0.  So if we have one
                   2293: 	    #  make it an average joe max/min.
                   2294: 	    
                   2295: 	    if ($max_len[$jn] == 0) {
                   2296: 		$max_len[$jn] = $avg_max;
                   2297: 	    }
                   2298: 	    if ($min_len[$jn] == 0) {
                   2299: 		$min_len[$jn] = $avg_min;
                   2300: 	    }
                   2301: 
1.206     sakharuk 2302: 	}
                   2303:        #final adjustment of column width
                   2304: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   2305: 	my @adjust=();
                   2306:         #step 1. adjustment by maximum value
1.370     albertel 2307: 	my $space_needed=0;
1.206     sakharuk 2308: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
1.370     albertel 2309: 	    $space_needed=$space_needed+$max_len[$jn];
1.206     sakharuk 2310: 	}
1.370     albertel 2311: 	if ($space_needed<=$available_space) {
1.362     foxr     2312: 
1.206     sakharuk 2313: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2314: 		if ($fwidth[$jn]==0) {
                   2315: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 2316: 		}
1.51      sakharuk 2317: 	    }
1.206     sakharuk 2318: 	} else {
                   2319:         #step 2. adjustment by minimum value (estimation)
1.370     albertel 2320: 	    $space_needed=0;
1.206     sakharuk 2321: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
1.370     albertel 2322: 		$space_needed+=$min_len[$jn];
1.206     sakharuk 2323: 	    }
1.370     albertel 2324: 	    if ($space_needed>$available_space) {
1.206     sakharuk 2325: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   2326: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2327: 		    if ($fwidth[$jn]==0) {
                   2328: 			$fwidth[$jn]=$min_len[$jn];
                   2329: 		    }
                   2330: 		}
1.229     sakharuk 2331: 		#check if we have objects which can be scaled
                   2332: 		my $how_many_to_scale=0;
                   2333: 		my @to_scale=();
                   2334: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2335: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   2336: 			$how_many_to_scale++;
                   2337: 			push @to_scale, $jn;
                   2338: 		    }
                   2339: 		}
                   2340: 		if ($how_many_to_scale>0) {
1.370     albertel 2341: 		    my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
1.229     sakharuk 2342: 		    foreach my $jn (@to_scale) {
                   2343: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2344: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   2345: 			    if ($1 ne '') {
                   2346: 				my $current_length=&recalc($1);
                   2347: 				$current_length=~/(\d+\.?\d*)/;
                   2348: 				$current_length=$current_length-$space_to_adjust;
                   2349: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   2350: 			    }
                   2351: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   2352: 			    if ($1 ne '') {
                   2353: 				my $current_length=$1;
                   2354: 				$current_length=$current_length-$space_to_adjust;
                   2355: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   2356: 			    }				
                   2357: 			}
                   2358: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   2359: 		    }
                   2360: 		}
1.206     sakharuk 2361: 	    } else {
                   2362: 	      #step 3. adjustment over minimal + corrections
1.370     albertel 2363: 		my $enlarge_coef=$available_space/$space_needed;
1.206     sakharuk 2364: 		my $acsessive=0;
                   2365: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2366: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2367: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2368: 			$fwidth[$jn]=$max_len[$jn];
                   2369: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2370: 			$adjust[$jn]=0;
1.357     foxr     2371: 
1.206     sakharuk 2372: 		    }
                   2373: 		}
                   2374: 		if ($acsessive>0) {
                   2375: 		#we have an excess of space and can redistribute it
                   2376: 		    my $notempty_columns=0;
                   2377: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2378: 			if ($adjust[$jn]!=0) {
                   2379: 			    $notempty_columns++;
                   2380: 			}
                   2381: 		    }
                   2382: 		    my $per_column=$acsessive/$notempty_columns;
                   2383: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2384: 			if ($adjust[$jn]!=0) {
                   2385: 			    $adjust[$jn]+=$per_column;
                   2386: 			    $fwidth[$jn]=$adjust[$jn];
                   2387: 			}
1.223     sakharuk 2388: 		    }
                   2389: 		} else {
                   2390: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2391: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2392: 		    }
                   2393: 		}
1.203     sakharuk 2394: 	    }
                   2395: 	}
1.364     foxr     2396:         # use all available width or specified width as if not specified,
                   2397: 	# the specified width gets defaulted to the available width.
                   2398: 
                   2399: 	my $current=0; 
                   2400: 	for (my $i=0;$i<=$#fwidth;$i++) {  
                   2401: 	    $current+=$fwidth[$i];
                   2402: 	}
1.371     albertel 2403: 	if ($current == 0) {
                   2404:             $current = $Apache::londefdef::table[-1]{'width'};
                   2405:         }
1.364     foxr     2406: 	my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
                   2407: 	for (my $i=0;$i<=$#fwidth;$i++) {  
                   2408: 	    $fwidth[$i]*=$coef;
1.206     sakharuk 2409: 	}
                   2410:         #removing of empty columns if allowed
1.208     sakharuk 2411:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2412: 	if ($permission eq 'yes') {
                   2413: 	    my @cleaned_table=();
                   2414:             my @cleaned_header=();
                   2415: 	    my $colind=0;
                   2416: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2417: 		if ($fwidth[$jn]!=0) {
                   2418: 		    #we need to copy column
                   2419: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2420: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2421: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2422: 		    }
                   2423: 		    $colind++;
                   2424: 		}
1.122     albertel 2425: 	    }
1.206     sakharuk 2426: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2427: 	    @fwidth=@cleaned_header;
1.122     albertel 2428: 	}
1.359     foxr     2429: 
1.358     foxr     2430: 
1.206     sakharuk 2431: 	#construct header of the table
                   2432: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2433: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2434: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2435: 	}
                   2436: 	$header_of_table .= '}';
1.357     foxr     2437: 
1.126     sakharuk 2438: 	#fill the table
                   2439: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.306     foxr     2440: 	    my $have_rowspan = 0;
1.206     sakharuk 2441: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
1.320     foxr     2442: 
                   2443: 		#-----------------------------------------------------------
                   2444:                 #   I think this order of doing things will ensure that
                   2445: 		#   single rowspan, columspan and combined row/colspans will
                   2446:                 #   work correctly.  LaTeX is delicate here.
                   2447: 		#    RF.
1.356     foxr     2448: 		
1.320     foxr     2449: 		# Start a rowspan if necessary:
1.356     foxr     2450: 		
                   2451: 		my $primary_col_width = $fwidth[$jn]; # Width of primary column.
1.320     foxr     2452: 		my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
                   2453: 		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
1.304     foxr     2454: 		#
                   2455: 		#  Do the appropriate magic if this has a colspan
                   2456: 		# 
1.356     foxr     2457: 		
1.372     foxr     2458: 		my $border_char = "";
                   2459: 		if ($border) {
                   2460: 		    $border_char = "|";
                   2461: 		}
1.356     foxr     2462: 		my $spanwidth = 0;
1.304     foxr     2463: 		if ($colspan > 1) {
1.336     foxr     2464: 		    for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
                   2465: 			$spanwidth += $fwidth[$spancol];
                   2466: 		    }
1.304     foxr     2467: 		    $output .= '\multicolumn{'.
                   2468: 			$colspan
1.337     foxr     2469: 			."}";
                   2470: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2471: 			$output .= '{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2472: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2473: 			$output .= '{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2474: 		    }
                   2475: 		    else {
1.372     foxr     2476: 			$output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
1.337     foxr     2477: 		    }
1.356     foxr     2478: 		    
                   2479: 		} else {
                   2480: 		    $spanwidth = $primary_col_width; # If no span width will be just colwidth
1.304     foxr     2481: 		}
1.306     foxr     2482: 
1.337     foxr     2483: 		# Rowspan... if colspan is 1, and there's an alignment we'll need
                   2484: 		# to kick in a multicolumn in order to get the alignment spec.
                   2485: 		# this must precede the multirow or LaTex gets quite upset.
                   2486: 		# Naturally if colspan > 1 we've already done that above ^
                   2487: 		#
                   2488: 		my $multirow_aligned = 0;
1.306     foxr     2489: 		if ($rowspan > 1) {
1.337     foxr     2490: 		    if ($colspan == 1) {
                   2491: 			if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2492: 			    $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2493: 			    $multirow_aligned = 1;
                   2494: 			} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2495: 			    $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2496: 			    $multirow_aligned = 1;
                   2497: 			}
                   2498: 		    }
1.306     foxr     2499: 		    $have_rowspan++;
1.356     foxr     2500: 		    if ($multirow_aligned) {
                   2501: 			$output .= '\multirow{'.$rowspan.'}[0]{*}{';
                   2502: 		    } else {
                   2503: 			$output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
                   2504: 		    }
1.350     albertel 2505: 		    
                   2506: 		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
                   2507: 			s{^\s*\\par\s*}{};
                   2508: 		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
                   2509: 			s{\s*\\vskip\s*0pt\s*$}{};
1.356     foxr     2510: 			  
1.337     foxr     2511: 		    #
                   2512: 		    # If we did not throw in a multicolumn to align, then add 
                   2513: 		    # an extra {
                   2514: 		    # so we close correctly without having to keep additional state
                   2515: 		    # around
                   2516: 		    #
                   2517: 		    if (!$multirow_aligned) {
                   2518: 			$output .= '{';
                   2519: 		    }
1.306     foxr     2520: 		}
                   2521: 		if (($rowspan eq '^') || ($rowspan eq '_')) {
                   2522: 		    $have_rowspan++;
                   2523: 		}
1.356     foxr     2524: 		    #--------------------------------------------------------------
1.306     foxr     2525: 
1.337     foxr     2526: 
                   2527: 		# For right and center alignment of single cells.
                   2528: 		# we are going to use a multicolumn with a span of 1 to specify alignment.
                   2529: 		#
                   2530: 		if ($colspan == 1  && $rowspan == 1) {
                   2531: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2532: 			$output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2533: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2534: 			$output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2535: 		    }
1.206     sakharuk 2536: 		}
1.337     foxr     2537: 
1.206     sakharuk 2538: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
1.337     foxr     2539: 
                   2540: 		if (($colspan == 1 && $rowspan == 1)   &&
                   2541: 		    (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
                   2542: 		     ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
                   2543: 		    $output .= '}';
1.206     sakharuk 2544: 		}
1.337     foxr     2545: 
1.306     foxr     2546: 		# Close off any open multirow:
                   2547: 		
                   2548: 		if ($rowspan > 1) {
1.337     foxr     2549: 		    $output .= '}}';
1.306     foxr     2550: 		}
1.304     foxr     2551: 		#  Close off the colspan...
                   2552: 		#
                   2553: 		if ($colspan > 1)  {
                   2554: 		    $output .= '}';
                   2555: 		    $jn += $colspan-1; # Adjust for number of rows really left.
                   2556: 		}
1.206     sakharuk 2557:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2558: 	    }
1.306     foxr     2559: 	    #  If have_rowspan > 0, and borders are on, then 
                   2560: 	    #  we need to do more than put an \hline at the bottom of row.
                   2561: 	    #  we need to do the appropriate \cline to ensure that
                   2562: 	    #  the spanned rows don't have \hlines through them.
                   2563: 
                   2564: 	    if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
                   2565: 		$output .= ' \\\\ ';
                   2566: 		for (my $jn=0; $jn<=$#fwidth;$jn++) {
                   2567: 		    my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
1.320     foxr     2568: 		    if ($rowspan ne "^") {
                   2569: 			if (($rowspan <= 1) || ($rowspan eq '_')) {
                   2570: 			    my $column = $jn+1;
                   2571: 			    $output .= '\cline{'.$column.'-'.$column.'} ';
                   2572: 			}
1.306     foxr     2573: 		    }
                   2574: 		}
                   2575: 
                   2576: 	    } else {
                   2577: 		$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
                   2578: 	    }
1.122     albertel 2579: 	}
1.281     foxr     2580: 	# Note that \newline destroys alignment env's produced  by e.g. <div>
                   2581: 	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
                   2582: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
1.127     sakharuk 2583: 	if ($#Apache::londefdef::table > 0) {	    
                   2584: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
1.294     foxr     2585: 	    # Figure out max/and min width  by summing us and then
                   2586: 	    # apply that to the current column of the table we nest in
                   2587: 	    # if it's larger than the current width or the current width
                   2588: 	    # is undefined.
                   2589: 	    #
                   2590: 	    my $min_nested_width = 0;
                   2591: 	    my $max_nested_width = 0;
                   2592: 	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
                   2593: 		$min_nested_width +=  $min_len[$col];
                   2594: 		$max_nested_width +=  $max_len[$col];
1.300     foxr     2595: 		
1.294     foxr     2596: 	    }
                   2597: 	    # Fudge in an extra 5 mm for borders etc:
                   2598: 	    
                   2599: 	    $min_nested_width += 5;
                   2600: 	    $max_nested_width += 5;
                   2601: 
                   2602: 	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
                   2603: 	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
                   2604: 	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
                   2605: 		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
                   2606: 	    }
                   2607: 	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
                   2608: 		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
                   2609: 	    }
                   2610: 
1.127     sakharuk 2611: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2612: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2613: 	} else {
                   2614: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2615: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2616: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2617: 	}
1.396     foxr     2618: 	}
                   2619: 	&enable_para();
1.384     foxr     2620:     }
1.398     foxr     2621:     }
1.122     albertel 2622:     return $currentstring;
                   2623: }
                   2624: 
1.166     sakharuk 2625: #-- <tr> tag (end tag optional)
1.122     albertel 2626: sub start_tr {
                   2627:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2628:     my $currentstring = '';
1.325     albertel 2629:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2630: 	$currentstring = $token->[4];     
                   2631:     } elsif ($target eq 'tex') {
1.398     foxr     2632: 
                   2633: 	my $align = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 1);
                   2634: 	$Apache::londefdef::table[-1]->start_row();
                   2635: 	
                   2636: 	if ($align ne '') {
                   2637: 	    $Apache::londefdef::table[-1]->configure_row({default_halign => $align});
                   2638: 	}
                   2639: 
                   2640: 	#---------------------------------------------------------------
                   2641: 	# Old table code.
                   2642: 	#---------------------------------------------------------------
                   2643: 
                   2644: 	if (0) {
1.122     albertel 2645: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2646: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2647: 	if ($alignchar ne '') {
1.206     sakharuk 2648: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2649: 	} else {
                   2650: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2651: 	}
                   2652: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
1.300     foxr     2653: 	#
                   2654: 	#  Need to save the number of table columns to preserve the max # columns.
                   2655: 	#
                   2656: 	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
1.122     albertel 2657: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2658: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2659: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2660: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2661: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2662: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.398     foxr     2663:     }
1.122     albertel 2664:     } 
                   2665:     return $currentstring;
                   2666: }
                   2667:         
                   2668: sub end_tr {
1.160     sakharuk 2669:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2670:     my $currentstring = &end_p();	# Close any pending <p> in the row.
1.325     albertel 2671:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2672: 	$currentstring .= $token->[2];     
1.122     albertel 2673:     } elsif ($target eq 'tex') {
1.398     foxr     2674: 
                   2675: 	# In case the user is missing a </td> or </th> tag:
                   2676: 
                   2677: 	if ($Apache::londefdef::TD_redirection) {
                   2678: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2679: 	}
                   2680: 	$Apache::londefdef::table[-1]->end_row();
                   2681: 
                   2682: 	#-----------------------------------------------
                   2683: 	# Old table code
                   2684: 	#-----------------------------------------------
                   2685: 
                   2686: 	if (0) {
1.160     sakharuk 2687: 	if ($Apache::londefdef::TD_redirection) {
                   2688: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2689: 	}
1.300     foxr     2690: 	# Counter columns must be the maximum number of columns seen
                   2691: 	# in the table so far so:
                   2692: 	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
                   2693: 	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
                   2694: 	}
1.398     foxr     2695:     }
1.295     foxr     2696: 
1.294     foxr     2697: 	
1.122     albertel 2698:     }
                   2699:     return $currentstring;
                   2700: }
                   2701: 
1.166     sakharuk 2702: #-- <td> tag (end tag optional)
1.122     albertel 2703: sub start_td {
                   2704:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2705:     my $currentstring = '';
1.325     albertel 2706:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2707: 	$currentstring = $token->[4];     
                   2708:     } elsif ($target eq 'tex') {
1.160     sakharuk 2709: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2710: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2711:     } 
                   2712:     return $currentstring;
                   2713: }   
1.159     sakharuk 2714:     
                   2715: sub tag_check {
                   2716:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2717:     my @ar=@$parstack; 
                   2718:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2719: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2720: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2721: 	    last;
                   2722: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2723: 	    splice @ar, $i+1;
                   2724: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2725: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2726: 	    last;
1.159     sakharuk 2727: 	}
1.160     sakharuk 2728:     }
1.159     sakharuk 2729:     return '';
                   2730: }
1.398     foxr     2731: 
                   2732: #
                   2733: #  Factor out cell configuration hash generation:
                   2734: #
                   2735: 
                   2736: sub cell_config_hash {
                   2737:     my ($align, $rowspan, $colspan) = @_;
                   2738:     my %config;
                   2739:     if ($align ne '') {
                   2740: 	$config{'halign'} = $align;
                   2741:     }
                   2742:     if ($colspan ne "") {
                   2743: 	$config{'colspan'} = $colspan;
                   2744:     }
                   2745:     if ($rowspan ne '') {
                   2746: 	$config{'rowspan'} = $rowspan;
                   2747:     }
                   2748:     return \%config;
                   2749: }
1.159     sakharuk 2750:  
                   2751: sub start_td_tex {
                   2752:     my ($parstack,$parser,$safeeval) = @_;
1.398     foxr     2753: 
                   2754:     # At this stage, an empty cell is created with the
                   2755:     # appropriate rowspan/colspan and alignment
                   2756:     # attributes, but empty of text.  end_td_tex will
                   2757:     # fetch the contents from the recursive parse and
                   2758:     # fill the cell with them:
                   2759:     my $align   = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 1);
                   2760:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 1);
                   2761:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 1);
                   2762: 
                   2763:     my $config = &cell_config_hash($align, $rowspan, $colspan);
                   2764: 
                   2765:     my $table = $Apache::londefdef::table[-1];
                   2766:     $table->add_cell('', $config);
                   2767:     
                   2768: 
                   2769:     #------------------------------------------------
                   2770:     #  Old table code.
                   2771:     #------------------------------------------------
                   2772: 
                   2773:     if (0) {
                   2774: 
1.206     sakharuk 2775:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2776:     if ($alignchar eq '') {
                   2777: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2778:     }
1.206     sakharuk 2779:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2780:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2781:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2782:     if (defined $TeXwidth) {		
                   2783: 	my $current_length=&recalc($TeXwidth);
                   2784: 	$current_length=~/(\d+\.?\d*)/;
                   2785: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2786:     }
1.398     foxr     2787:     }
1.159     sakharuk 2788:     &Apache::lonxml::startredirection();
                   2789:     return '';
                   2790: }
                   2791: 
                   2792: sub end_td_tex {
1.398     foxr     2793: 
                   2794:     my $text = &Apache::lonxml::endredirection();
                   2795:     my $table = $Apache::londefdef::table[-1];
                   2796:     $table->append_cell_text($text);
                   2797: 
                   2798:     #-------------------------------------------------
                   2799:     # Old table code
                   2800:     #-------------------------------------------------
                   2801: 
                   2802:     if (0) {
1.159     sakharuk 2803:     my ($parstack,$parser,$safeeval) = @_;
1.304     foxr     2804:     my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
                   2805:     my $current_column = $Apache::londefdef::table[-1]{'counter_columns'}; 
1.303     foxr     2806:     my $data = &Apache::lonxml::endredirection();
                   2807: 
1.305     foxr     2808:     #  The rowspan array of the table indicates which cells are part of a span.
                   2809:     #  n indicates the start of a span set of n rows.
                   2810:     #  ^ indicates a cell that continues a span set.
1.306     foxr     2811:     #  _ indicates the cell is at the bottom of a span set.
1.305     foxr     2812:     #  If this and subsequent cells are part of a rowspan, we must
                   2813:     #  push along the row until we find one that is not.
                   2814: 
                   2815:     while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column]) 
1.306     foxr     2816: 	   && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
1.305     foxr     2817: 	# Part of a span.
                   2818: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
                   2819: 	$current_column++;
                   2820:     }
                   2821:     $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
                   2822:    
                   2823: 
1.320     foxr     2824:     # Get the column and row spans.
                   2825:     # Colspan can be done via \multicolumn if I can figure out the data structs.
                   2826: 
                   2827:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
                   2828:     if (!$colspan) {
                   2829: 	$colspan = 1;
                   2830:     }
1.305     foxr     2831: 
                   2832:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
                   2833:     if (!$rowspan) {
                   2834: 	$rowspan = 1;
                   2835:     }
                   2836: 
1.303     foxr     2837: 
1.305     foxr     2838: 
1.320     foxr     2839:     for (my $c = 0; $c < $colspan; $c++) {
                   2840: 	$Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
                   2841: 	for (my $i = 1; $i < $rowspan; $i++) {
                   2842: 	    $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
                   2843: 	    if ($i == ($rowspan-1)) {
                   2844: 		$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
                   2845: 	    }
1.306     foxr     2846: 	}
1.305     foxr     2847:     }
1.304     foxr     2848: 
1.159     sakharuk 2849:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2850:     if (defined $TeXwidth) {		
1.357     foxr     2851: 	for (my $c = 0; $c < $colspan; $c++) {
                   2852: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2853: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2854: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2855: 	}
1.159     sakharuk 2856:     } else {
1.206     sakharuk 2857: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2858: 	    my $garbage_data=$data;
                   2859: 	    my $fwidth=0;
                   2860:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2861: 		my $current_length=&recalc($1);
                   2862: 		$current_length=~/(\d+\.?\d*)/;
                   2863: 		if ($fwidth<$1) {$fwidth=$1;}
                   2864: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2865: 	    }
                   2866:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2867: 		my $current_length=$1;
                   2868: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2869: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2870: 	    }
1.357     foxr     2871: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2872: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2873: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2874: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2875: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2876: 	    }
1.231     sakharuk 2877: 	} 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)*/) {
                   2878: 	    my $garbage_data=$data;
                   2879: 	    my $fwidth=0;
                   2880:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2881: 		my $current_length=&recalc($1);
                   2882: 		$current_length=~/(\d+\.?\d*)/;
                   2883: 		if ($fwidth<$1) {$fwidth=$1;}
                   2884: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2885: 	    }
                   2886:             while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2887: 		my $current_length=&recalc($1);
                   2888: 		$current_length=~/(\d+\.?\d*)/;
                   2889: 		if ($fwidth<$1) {$fwidth=$1;}
                   2890: 		$garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2891: 	    }
1.357     foxr     2892: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2893: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2894: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2895: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2896: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2897: 	    }
1.231     sakharuk 2898: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2899: 	} else {  
1.166     sakharuk 2900: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2901: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2902: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2903: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2904: 	    if ($data=~/\\vskip/) {
                   2905:                 my $newdata=$data;
                   2906: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2907: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2908: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2909: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2910: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2911:                     my @words=split(/ /,$elementdata);
                   2912: 		    foreach my $word (@words) {
                   2913: 			my $lengthword=2.5*&LATEX_length($word);
                   2914: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2915: 		    }
1.166     sakharuk 2916: 		}
                   2917: 	    } else {
1.206     sakharuk 2918: 		$current_length=2.5*&LATEX_length($data);
                   2919:                     my @words=split(/ /,$data);
                   2920: 		    foreach my $word (@words) {
1.228     sakharuk 2921: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2922: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2923: 		    }
1.166     sakharuk 2924: 	    }
1.357     foxr     2925: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2926: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2927: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2928: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2929: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2930: 	    }
1.159     sakharuk 2931: 	}        
                   2932:     }
1.302     foxr     2933:     # Substitute all of the tables nested in this cell in their appropriate places.
                   2934: 
                   2935: 
                   2936:     my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
                   2937:     for (my $in=0; $in<=$nested_count; $in++) {    
1.301     foxr     2938: 	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
                   2939: 	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
                   2940: 	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2941: 	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
                   2942: 
                   2943:     }
                   2944:     # Should be be killing off the 'include' elements as they're used up?
1.305     foxr     2945: 
1.206     sakharuk 2946:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.305     foxr     2947: 
1.304     foxr     2948: 
                   2949: 
                   2950: 
                   2951:     #  the colspan array will indicate how many columns will be spanned by this
                   2952:     #  cell..this requires that counter_columns also be adjusted accordingly
                   2953:     #  so that the next bunch of text goes in the right cell.  Note that since
                   2954:     #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
                   2955:     #
                   2956: 
                   2957:     $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
                   2958:     for (my $i = 0; $i < ($colspan -1); $i++) {
                   2959: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
                   2960:     }
1.320     foxr     2961:     for (my $r = 0; $r < $rowspan; $r++) {
                   2962: 	$Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
                   2963: 	# Put empty text in spanned cols.
                   2964: 	
                   2965:     }
                   2966: 
1.398     foxr     2967:     }
1.304     foxr     2968: 
1.301     foxr     2969:     return '';
1.159     sakharuk 2970: }
                   2971: 
1.122     albertel 2972: sub end_td {
1.126     sakharuk 2973:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2974:     my $currentstring = '';
1.325     albertel 2975:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2976: 	$currentstring = $token->[2];     
                   2977:     } elsif ($target eq 'tex') {
1.160     sakharuk 2978:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2979: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2980:     }
                   2981:     return $currentstring;
                   2982: }
                   2983: 
1.166     sakharuk 2984: #-- <th> tag (end tag optional)
1.122     albertel 2985: sub start_th {
                   2986:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2987:     my $currentstring = '';
1.325     albertel 2988:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2989: 	$currentstring = $token->[4];     
                   2990:     } elsif ($target eq 'tex') {
1.230     sakharuk 2991: 	$Apache::londefdef::TD_redirection = 1;
                   2992: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2993:     } 
                   2994:     return $currentstring;
1.130     sakharuk 2995: }   
1.230     sakharuk 2996:     
                   2997: sub tagg_check {
                   2998:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2999:     my @ar=@$parstack; 
                   3000:     for (my $i=$#ar-1;$i>=0;$i--) {
                   3001: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   3002: 	    &start_th_tex($parstack,$parser,$safeeval);
                   3003: 	    last;
                   3004: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   3005: 	    splice @ar, $i+1;
                   3006: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   3007: 	    &start_th_tex($parstack,$parser,$safeeval);
                   3008: 	    last;
                   3009: 	}
                   3010:     }
                   3011:     return '';
                   3012: }
                   3013:  
                   3014: sub start_th_tex {
                   3015:     my ($parstack,$parser,$safeeval) = @_;
1.398     foxr     3016: 
                   3017:     my $alignment = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef,1);
                   3018:     my $rowspan  =  &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 1);
                   3019:     my $colspan  =  &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 1);
                   3020: 
                   3021:     my $config   = cell_config_hash($alignment, $rowspan, $colspan);
                   3022:     my $table    = $Apache::londefdef::table[-1];
                   3023:     $table->add_cell('\textbf{', $config);
                   3024: 
                   3025:     #-------------------------------------------------------------------------------------
                   3026:     #
                   3027:     #  Old table code.
                   3028:     #
                   3029:     #--------------------------------------------------------------------------------------
                   3030: 
                   3031:     if (0) {
                   3032: 
                   3033: 
1.230     sakharuk 3034:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   3035:     if ($alignchar eq '') {
                   3036: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   3037:     }
                   3038:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   3039:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   3040:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   3041:     if (defined $TeXwidth) {		
                   3042: 	my $current_length=&recalc($TeXwidth);
                   3043: 	$current_length=~/(\d+\.?\d*)/;
                   3044: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   3045:     }
1.398     foxr     3046:     }
                   3047: 
                   3048:     # Accept xml until the </th> tag.
                   3049: 
1.230     sakharuk 3050:     &Apache::lonxml::startredirection();
                   3051:     return '';
                   3052: }
                   3053: 
                   3054: sub end_th_tex {
                   3055:     my ($parstack,$parser,$safeeval) = @_;
1.398     foxr     3056: 
                   3057:     my $table = $Apache::londefdef::table[-1];
                   3058:     my $text  = &Apache::lonxml::endredirection();
                   3059:     $table->append_cell_text($text.'}');
                   3060: 
                   3061:     #-----------------------------------------------------------------------------
                   3062:     #  Old table code:
                   3063:     #-----------------------------------------------------------------------------
                   3064: 
                   3065:     if (0) {
1.230     sakharuk 3066:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   3067:     my $data=&Apache::lonxml::endredirection();
                   3068:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   3069:     if (defined $TeXwidth) {		
                   3070: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3071: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3072: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3073:     } else {
                   3074: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   3075: 	    my $garbage_data=$data;
                   3076: 	    my $fwidth=0;
                   3077:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   3078: 		my $current_length=&recalc($1);
                   3079: 		$current_length=~/(\d+\.?\d*)/;
                   3080: 		if ($fwidth<$1) {$fwidth=$1;}
                   3081: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   3082: 	    }
                   3083:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   3084: 		my $current_length=$1;
                   3085: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   3086: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   3087: 	    }
                   3088: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3089: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   3090: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3091: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3092: 	} else {  
                   3093: 	    $data=~s/^\s+(\S.*)/$1/; 
                   3094: 	    $data=~s/(.*\S)\s+$/$1/;
                   3095: 	    $data=~s/(\s)+/$1/;
                   3096: 	    my ($current_length,$min_length)=(0,0);
                   3097: 	    if ($data=~/\\vskip/) {
                   3098:                 my $newdata=$data;
                   3099: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   3100: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   3101: 		foreach my $elementdata (@newdata) {
                   3102: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   3103: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   3104:                     my @words=split(/ /,$elementdata);
                   3105: 		    foreach my $word (@words) {
                   3106: 			my $lengthword=2.5*&LATEX_length($word);
                   3107: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   3108: 		    }
                   3109: 		}
                   3110: 	    } else {
                   3111: 		$current_length=2.5*&LATEX_length($data);
                   3112:                     my @words=split(/ /,$data);
                   3113: 		    foreach my $word (@words) {
                   3114: 			my $lengthword=2*&LATEX_length($word);
                   3115: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   3116: 		    }
                   3117: 	    }
                   3118: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3119: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3120: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   3121: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   3122: 	}        
                   3123:     }
                   3124: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   3125: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   3126: 	}
                   3127:     #make data bold
                   3128:     $data='\textbf{'.$data.'}';
                   3129:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.398     foxr     3130:     }
1.230     sakharuk 3131:     return'';
                   3132: }
                   3133: 
1.122     albertel 3134: sub end_th {
1.130     sakharuk 3135:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3136:     my $currentstring = &end_p();	# Close any open <p> in the row.
1.325     albertel 3137:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3138: 	$currentstring .= $token->[2];     
1.122     albertel 3139:     } elsif ($target eq 'tex') {
1.230     sakharuk 3140:         $Apache::londefdef::TD_redirection =0;
                   3141: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 3142:     }
                   3143:     return $currentstring;
                   3144: }
1.230     sakharuk 3145:      
1.181     sakharuk 3146: #-- <img> tag (end tag forbidden)
1.249     foxr     3147: #
                   3148: #  Render the <IMG> tag.
                   3149: #     <IMG> has the following attributes (in addition to the 
                   3150: #     standard HTML ones:
                   3151: #      TeXwrap   - Governs how the tex target will try to wrap text around
                   3152: #                  horizontally aligned images.
                   3153: #      TeXwidth  - The width of the image when rendered for print (mm).
                   3154: #      TeXheight - The height of the image when rendered for print (mm)
                   3155: #         (Note there seems to also be support for this as a % of page size)
                   3156: #      
1.122     albertel 3157: sub start_img {
1.299     albertel 3158:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel 3159:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   3160: 					 undef,1);
1.325     albertel 3161:     if (! $src && 
                   3162: 	($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
                   3163: 	) { 
1.299     albertel 3164: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
1.189     albertel 3165: 	return '';
                   3166:     }
1.290     albertel 3167:     &Apache::lonxml::extlink($src);
1.122     albertel 3168:     my $currentstring = '';
                   3169:     my $scaling = .3;
1.249     foxr     3170: 
                   3171:    # Render unto browsers that which are the browser's...
                   3172: 
1.325     albertel 3173:     if ($target eq 'web' || $target eq 'webgrade') {
1.417     bisitz   3174:         my $enc = ('yes' eq 
                   3175:                    lc(&Apache::lonxml::get_param('encrypturl',$parstack,
                   3176:                       $safeeval)));
                   3177:         $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
                   3178:                          $enc);
1.249     foxr     3179: 
1.417     bisitz   3180:     # and render unto TeX that which is LaTeX
1.122     albertel 3181:     } elsif ($target eq 'tex') {
1.248     foxr     3182: 	#
                   3183: 	#  The alignment will require some superstructure to be put around
                   3184: 	#  the \includegraphics stuff.  At present we can only partially
                   3185: 	#  simulate the alignments offered by html.
                   3186: 	#
                   3187: 	#
                   3188: 	my $align = lc(&Apache::lonxml::get_param('align', 
                   3189: 						  $parstack,
                   3190: 						  $safeeval,
                   3191: 						  undef,1));
                   3192: 	if(!$align) {
1.287     foxr     3193: 		$align = "bottom";	# This is html's default so it's ours too.
1.248     foxr     3194: 	}
                   3195: 	#
                   3196: 	&Apache::lonxml::debug("Alignemnt = $align");
                   3197: 	#  LaTeX's image/text wrapping is really bad since it wants to
                   3198: 	#  make figures float.  
                   3199:         #   The user has the optional parameter (applicable only to l/r
                   3200: 	# alignment to use the picins/parpic directive to get wrapped text
                   3201: 	# this is also imperfect.. that's why we give them a choice...
                   3202: 	# so they can't yell at us for our choice.
                   3203: 	#
                   3204: 	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
                   3205: 							    $parstack,
                   3206: 							    $safeeval,
                   3207: 							    undef,0);
1.312     foxr     3208: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
1.248     foxr     3209: 	if(!$latex_rendering) {
1.312     foxr     3210: 		$latex_rendering = "texwrap";
                   3211: 	}
                   3212: 	# using texwrap inside a table does not work. So, if after all of this,
                   3213: 	# texwrap is on, we turn it off if we detect we're in a table:
                   3214: 	#
                   3215: 	if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
                   3216: 	    $latex_rendering = 'parpic';
1.248     foxr     3217: 	}
1.323     foxr     3218: 
1.312     foxr     3219: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
1.248     foxr     3220: 
1.390     foxr     3221: 	#if original bmp/gif/jpg/png file exist do following:
1.266     albertel 3222: 	my $origsrc=$src;
1.256     albertel 3223: 	my ($path,$file) = &get_eps_image($src);
1.341     foxr     3224: 	# &Apache::lonnet::logthis("Image source: $src result: $path $file");
1.122     albertel 3225: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.261     foxr     3226: 	&Apache::lonxml::debug("path = $path file = $file src = $src");
1.192     sakharuk 3227: 	if (-e $src) {
1.261     foxr     3228: 	    &Apache::lonxml::debug("$src exists");
1.256     albertel 3229: 	    my ($height_param,$width_param)=
1.266     albertel 3230: 		&image_size($origsrc,0.3,$parstack,$safeeval);
                   3231: 	    my $size;
                   3232: 	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
                   3233: 	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
1.341     foxr     3234: 	    # Default size if not able to extract that (e.g. eps image).
                   3235: 	    
                   3236: 	    # &Apache::lonnet::logthis("Size = $size");
                   3237: 	    
1.266     albertel 3238: 	    $size='['.$size;
                   3239: 	    $size=~s/,$/]/; 
1.344     albertel 3240: 	    $currentstring .= '\graphicspath{{'.$path.'}}'
                   3241: 		.'\includegraphics'.$size.'{'.$file.'} ';
1.354     foxr     3242: 	    my $closure;
                   3243: 	    ($currentstring, $closure) = &align_latex_image($align, 
                   3244: 							    $latex_rendering, 
                   3245: 							    $currentstring, 
                   3246: 							    $width_param, 
                   3247: 							    $height_param);
                   3248: 	    $currentstring .= $closure;
1.353     foxr     3249: 						
1.122     albertel 3250: 	} else {
1.261     foxr     3251: 	    &Apache::lonxml::debug("$src does not exist");
1.122     albertel 3252: 	    #original image file doesn't exist so check the alt attribute
                   3253: 	    my $alt = 
                   3254: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   3255: 	    unless ($alt) {
                   3256: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   3257: 	    }
                   3258: 
1.256     albertel 3259: 	    if ($alt) { $currentstring .= ' '.$alt.' '; }
1.59      sakharuk 3260: 	}
1.249     foxr     3261: 
                   3262: 	# And here's where the semi-quote breaks down: allow the user
                   3263:         # to edit the beast as well by rendering the problem for edit:
1.186     albertel 3264:     } elsif ($target eq 'edit') {
1.368     banghart 3265:         my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
1.186     albertel 3266: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   3267: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
1.368     banghart 3268: 	    &Apache::edit::browse('src',undef,'alt',$only).' '.
1.186     albertel 3269: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   3270: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   3271: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   3272: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   3273: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   3274: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 3275: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   3276: 						   ['','bottom','middle','top','left','right'],$token,5);
1.249     foxr     3277: 	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
1.348     albertel 3278: 						   ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
1.418     www      3279:         my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   3280:         my $enc=    &Apache::lonxml::get_param('encrypturl',$parstack,$safeeval);
                   3281:  
1.332     www      3282: 	$currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
1.322     albertel 3283: 						   ['no','yes'], $token, 2);
1.418     www      3284:         if (($alt=~/\S/) && (lc($enc) eq 'yes')) {
                   3285:            $currentstring.='<br /><span class="LC_warning">'.&mt('Warning: the description "[_1]" will be available, even for encrypted URL',$alt).'</span><br />';
                   3286:         }
1.186     albertel 3287: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.249     foxr     3288: 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
                   3289: 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
                   3290: 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
                   3291: 
1.381     www      3292:         if ($token->[2]{'src'}=~/\$/) {
1.418     www      3293:            $currentstring.=&mt('Variable image source');
                   3294:         } elsif ($token->[2]{'src'}=~/\S/) {
1.381     www      3295: 	   $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   3296: 	   if ($width) { $currentstring.=' width="'.$width.'" '; }
                   3297: 	   if ($height) { $currentstring.=' height="'.$height.'" '; }
                   3298: 	   $currentstring .= ' />';
1.418     www      3299:         } else {
                   3300:            $currentstring.=&mt("No image source specified");
1.381     www      3301:         }
1.186     albertel 3302:     } elsif ($target eq 'modified') {
1.210     albertel 3303: 	my ($osrc,$owidth,$oheight)=
                   3304: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   3305: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 3306: 					     $safeeval,'src','alt','align',
1.249     foxr     3307: 					     'TeXwidth','TeXheight', 'TeXwrap',
1.322     albertel 3308: 					     'width','height','encrypturl');
1.210     albertel 3309: 	my ($nsrc,$nwidth,$nheight)=
                   3310: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   3311: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   3312: 	&image_replication($loc);
                   3313: 	my ($iwidth,$iheight);
                   3314: 	if (-e $loc) {
                   3315: 	    my $image = Image::Magick->new;
                   3316: 	    $image->Read($loc);
                   3317: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   3318: 				   $image->Get('height'));
                   3319: 	}
                   3320: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   3321: 	    # changed image or no size specified,
                   3322:             # if they didn't explicitly change the 
                   3323:             # width or height use the ones from the image
                   3324: 	    if ($iwidth && $iheight) {
                   3325: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   3326: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   3327: 		}
                   3328: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   3329: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 3330: 		}
                   3331: 	    }
                   3332: 	}
1.210     albertel 3333: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   3334: 	# if we don't have a width or height
                   3335: 	if ($iwidth && $cwidth && !$cheight) {
                   3336: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   3337: 	}
                   3338: 	if ($iheight && $cheight && !$cwidth) {
                   3339: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   3340: 	}
                   3341: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 3342:     }
1.261     foxr     3343: 
1.122     albertel 3344:     return $currentstring;
                   3345: }
                   3346: 
                   3347: sub end_img {
                   3348:     my ($target,$token) = @_;
                   3349:     my $currentstring = '';
1.325     albertel 3350:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3351: 	$currentstring = $token->[2];
                   3352:     } elsif ($target eq 'tex') {
                   3353: 	$currentstring = '';
                   3354:     }
                   3355:     return $currentstring;
                   3356: }
                   3357: 
1.181     sakharuk 3358: #-- <applet> tag (end tag required)
1.122     albertel 3359: sub start_applet {
                   3360:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3361:     
                   3362:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
1.290     albertel 3363:     &Apache::lonxml::extlink($code);
1.122     albertel 3364:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   3365: 					   undef,1);
1.290     albertel 3366:     &Apache::lonxml::extlink($archive);
1.122     albertel 3367:     my $currentstring = '';
1.325     albertel 3368:     if ($target eq 'web' || $target eq 'webgrade') {
1.417     bisitz   3369:         $currentstring = &Apache::lonenc::encrypt_ref($token,
                   3370:                                                       {'code'=>$code,
                   3371:                                                        'archive'=>$archive}
                   3372:                                                      );
1.122     albertel 3373:     } elsif ($target eq 'tex') {
1.417     bisitz   3374:         # Turn off some stuff we can't be inside thank you LaTeX
1.361     foxr     3375: 
                   3376: 	my $restart_sub = 0;
                   3377: 	my $restart_sup = 0;
                   3378: 
                   3379: 	# Since <sub> and <sup> are simple tags it's ok to turn off/on
                   3380: 	# using the start_ stop_ functions.. those tags only care about
                   3381: 	# $target.
                   3382: 
                   3383: 	if (&is_inside_of($tagstack, "sub")) {
                   3384: 	    $restart_sub = 1;
                   3385: 	    $currentstring .= &end_sub($target, $token, $tagstack, 
                   3386: 				       $parstack, $parser, $safeeval);
                   3387: 	}
                   3388: 	if (&is_inside_of($tagstack, "sup")) {
                   3389: 	    $restart_sup = 1;
                   3390: 	    $currentstring .= &end_sup($target, $token, $tagstack,
                   3391: 				       $parstack, $parser, $safeeval);
                   3392: 	}
                   3393: 
                   3394: 	# Now process the applet; just replace it with its alt attribute.
                   3395: 
1.177     albertel 3396: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3397: 					       $safeeval,undef,1);
                   3398: 	unless ($alttag) {
                   3399: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   3400: 						undef,1);
                   3401: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3402: 					     $code);
1.175     sakharuk 3403: 	}
1.177     albertel 3404: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   3405: 	    '.}\end{center}';
1.361     foxr     3406: 
                   3407: 	# Turn stuff back on that we can't be inside of.
                   3408: 
                   3409: 	if ($restart_sub) {
                   3410: 	    $currentstring .= &start_sub($target, $token, $tagstack,
                   3411: 					$parstack, $parser, $safeeval);
                   3412: 	}
                   3413: 	if ($restart_sup) {
                   3414: 	    $currentstring .= &start_sup($target, $token, $tagstack,
                   3415: 					 $parstack, $parser, $safeeval);
                   3416: 	}
1.122     albertel 3417:     } 
                   3418:     return $currentstring;
                   3419: }
                   3420: 
                   3421: sub end_applet {
                   3422:     my ($target,$token) = @_;
                   3423:     my $currentstring = '';
1.325     albertel 3424:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3425: 	$currentstring = $token->[2];
                   3426:     } elsif ($target eq 'tex') {
                   3427:     } 
                   3428:     return $currentstring;
                   3429: }
                   3430: 
1.181     sakharuk 3431: #-- <embed> tag (end tag optional/required)
1.122     albertel 3432: sub start_embed {    
                   3433:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3434:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3435:     &Apache::lonxml::extlink($src);
1.122     albertel 3436:     my $currentstring = '';
1.325     albertel 3437:     if ($target eq 'web' || $target eq 'webgrade') {
1.417     bisitz   3438:     $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src}); 
1.122     albertel 3439:     } elsif ($target eq 'tex') {
                   3440:     } 
                   3441:     return $currentstring;
                   3442: }
                   3443: 
                   3444: sub end_embed {
                   3445:     my ($target,$token) = @_;
                   3446:     my $currentstring = '';
1.325     albertel 3447:     if ($target eq 'web' || $target eq 'webgrade') {
1.417     bisitz   3448:         $currentstring = $token->[2];
                   3449:     } elsif ($target eq 'tex') {
                   3450:         # ./.
                   3451:     }
1.122     albertel 3452:     return $currentstring;
                   3453: }
                   3454: 
1.181     sakharuk 3455: #-- <param> tag (end tag forbidden)
1.122     albertel 3456: sub start_param {
                   3457:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.290     albertel 3458:     if (&Apache::lonxml::get_param('name',$parstack,
                   3459: 				   $safeeval,undef,1)=~/^cabbase$/i) {
                   3460: 	my $value=&Apache::lonxml::get_param('value',$parstack,
                   3461: 					     $safeeval,undef,1);
                   3462: 	&Apache::lonxml::extlink($value);
                   3463:     } 
                   3464:   
                   3465:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3466:     &Apache::lonxml::extlink($src);
1.122     albertel 3467:     my $currentstring = '';
1.325     albertel 3468:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 3469: 	my %toconvert;
                   3470: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3471: 	if ($src) { $toconvert{'src'}= $src; }
                   3472: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
                   3473: 					    undef,1);
1.251     albertel 3474: 	if ($name=~/^cabbase$/i) {
                   3475: 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
                   3476: 							   $safeeval,undef,1);
                   3477: 	}
1.250     albertel 3478: 	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
1.122     albertel 3479:     } elsif ($target eq 'tex') {
                   3480:     } 
                   3481:     return $currentstring;
                   3482: }
                   3483: 
                   3484: sub end_param {
                   3485:     my ($target,$token) = @_;
                   3486:     my $currentstring = '';
1.325     albertel 3487:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3488: 	$currentstring = $token->[2];     
                   3489:     } elsif ($target eq 'tex') {
                   3490:     } 
                   3491:     return $currentstring;
                   3492: }
                   3493: 
                   3494: #-- <allow> tag
                   3495: sub start_allow {
                   3496:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3497:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3498:     &Apache::lonxml::extlink($src);
                   3499: 
1.241     albertel 3500:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 3501:     my $result;
                   3502:     if ($target eq 'edit') {
                   3503: 	$result .=&Apache::edit::tag_start($target,$token);
                   3504: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   3505: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   3506:     } elsif ($target eq 'modified') {
                   3507: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   3508: 						     $safeeval,'src');
                   3509: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   3510:     }
                   3511:     return $result;
                   3512: }
                   3513: 
                   3514: sub end_allow {
                   3515:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3516:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   3517:     return '';
                   3518: }
1.119     www      3519: 
1.181     sakharuk 3520: #-- Frames (end tag required)
                   3521: #-- <frameset>
1.122     albertel 3522: sub start_frameset {
                   3523:     my ($target,$token) = @_;
1.277     foxr     3524:     my $currentstring = '';	# Close any pending para.
1.325     albertel 3525:     if ($target eq 'web' || $target eq 'webgrade') { 
1.328     albertel 3526: 	$currentstring = 
                   3527: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
                   3528: 					   $Apache::londefdef::head,
                   3529: 					   {'add_entries'    => $token->[2],
1.404     bisitz   3530: #					    'no_title'       => 1,
1.328     albertel 3531: 					    'force_register' => 1,
                   3532: 					    'frameset'       => 1,});
                   3533: 
1.122     albertel 3534:     }
                   3535:     return $currentstring;
                   3536: }
                   3537: 
                   3538: sub end_frameset {
                   3539:     my ($target,$token) = @_;
                   3540:     my $currentstring = '';
1.325     albertel 3541:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3542: 	$currentstring = $token->[2];
                   3543:     }
                   3544:     return $currentstring;
                   3545: }
1.162     sakharuk 3546: 
1.181     sakharuk 3547: #-- <xmp> (end tag required)
1.162     sakharuk 3548: sub start_xmp {
                   3549:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3550:     my $currentstring = '';
1.325     albertel 3551:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3552: 	$currentstring .= $token->[4];
                   3553:     } elsif ($target eq 'tex') {
                   3554: 	$currentstring .= '\begin{verbatim}';
                   3555:     } 
                   3556:     return $currentstring;
                   3557: }
                   3558: 
                   3559: sub end_xmp {
                   3560:     my ($target,$token) = @_;
                   3561:     my $currentstring = '';
1.325     albertel 3562:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3563: 	$currentstring .= $token->[2];
                   3564:     } elsif ($target eq 'tex') {
                   3565: 	$currentstring .= '\end{verbatim}';
                   3566:     }
                   3567:     return $currentstring;
                   3568: }
                   3569: 
1.181     sakharuk 3570: #-- <pre> (end tag required)
1.122     albertel 3571: sub start_pre {
1.126     sakharuk 3572:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3573:     my $currentstring = &end_p();	# close off pending <p>
1.325     albertel 3574:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3575: 	$currentstring .= $token->[4];
                   3576:     } elsif ($target eq 'tex') {
1.136     sakharuk 3577: 	$currentstring .= '\begin{verbatim}';
1.319     albertel 3578: 	&Apache::lonxml::disable_LaTeX_substitutions();
1.122     albertel 3579:     } 
                   3580:     return $currentstring;
                   3581: }
                   3582: 
                   3583: sub end_pre {
                   3584:     my ($target,$token) = @_;
                   3585:     my $currentstring = '';
1.325     albertel 3586:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3587: 	$currentstring .= $token->[2];
                   3588:     } elsif ($target eq 'tex') {
1.136     sakharuk 3589: 	$currentstring .= '\end{verbatim}';
1.319     albertel 3590: 	&Apache::lonxml::enable_LaTeX_substitutions();
1.122     albertel 3591:     }
                   3592:     return $currentstring;
                   3593: }
                   3594: 
                   3595: #-- <insert>
                   3596: sub start_insert {
                   3597:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3598:     my $currentstring = '';
1.325     albertel 3599:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3600: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3601: 	$currentstring .= '<b>'.$display.'</b>';;
                   3602:     }
                   3603:     return $currentstring;
                   3604: }
                   3605: 
                   3606: sub end_insert {
                   3607:     my ($target,$token) = @_;
                   3608:     my $currentstring = '';
1.325     albertel 3609:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3610: 	$currentstring .= '';
                   3611:     }
                   3612:     return $currentstring;
                   3613: }
                   3614: 
                   3615: #-- <externallink>
                   3616: sub start_externallink {
                   3617:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3618:     my $currentstring = '';
1.325     albertel 3619:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3620: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3621: 	$currentstring .= '<b>'.$display.'</b>';;
                   3622:     }
                   3623:     return $currentstring;
                   3624: }
                   3625: 
                   3626: sub end_externallink {
                   3627:     my ($target,$token) = @_;
                   3628:     my $currentstring = '';
1.325     albertel 3629:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3630: 	$currentstring .= '';
                   3631:     }
                   3632:     return $currentstring;
                   3633: }
                   3634: 
                   3635: #-- <blankspace heigth="">
                   3636: sub start_blankspace {
                   3637:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3638:     my $currentstring = &end_p();	# closes off any unclosed <p>
1.122     albertel 3639:     if ($target eq 'tex') {
                   3640: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   3641: 	$currentstring .= '\vskip '.$howmuch.' ';
                   3642:     }
                   3643:     return $currentstring;
                   3644: }
                   3645: 
                   3646: sub end_blankspace {
                   3647:     my ($target,$token) = @_;
                   3648:     my $currentstring = '';
                   3649:     if ($target eq 'tex') {
                   3650: 	$currentstring .= '';
                   3651:     }
                   3652:     return $currentstring;
                   3653: }
                   3654: 
1.181     sakharuk 3655: #-- <abbr> tag (end tag required)
1.122     albertel 3656: sub start_abbr {
                   3657:     my ($target,$token) = @_;
                   3658:     my $currentstring = '';
1.325     albertel 3659:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3660: 	$currentstring = $token->[4];     
                   3661:     } 
                   3662:     return $currentstring;
                   3663: }
                   3664: 
                   3665: sub end_abbr {
                   3666:     my ($target,$token) = @_;
                   3667:     my $currentstring = '';
1.325     albertel 3668:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3669: 	$currentstring = $token->[2];    
                   3670:     } 
                   3671:     return $currentstring;
                   3672: }
                   3673: 
1.181     sakharuk 3674: #-- <acronym> tag (end tag required)
1.122     albertel 3675: sub start_acronym {
                   3676:     my ($target,$token) = @_;
                   3677:     my $currentstring = '';
1.325     albertel 3678:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3679: 	$currentstring = $token->[4];     
                   3680:     } 
                   3681:     return $currentstring;
                   3682: }
                   3683: 
                   3684: sub end_acronym {
                   3685:     my ($target,$token) = @_;
                   3686:     my $currentstring = '';
1.325     albertel 3687:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3688: 	$currentstring = $token->[2];    
                   3689:     } 
                   3690:     return $currentstring;
                   3691: }
                   3692: 
1.181     sakharuk 3693: #-- <area> tag (end tag forbidden)
1.122     albertel 3694: sub start_area {
                   3695:     my ($target,$token) = @_;
                   3696:     my $currentstring = '';
1.325     albertel 3697:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3698: 	$currentstring = $token->[4];     
                   3699:     } 
                   3700:     return $currentstring;
                   3701: }
                   3702: 
                   3703: sub end_area {
                   3704:     my ($target,$token) = @_;
                   3705:     my $currentstring = '';
1.325     albertel 3706:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3707: 	$currentstring = $token->[2];    
                   3708:     } 
                   3709:     return $currentstring;
                   3710: }
                   3711: 
1.181     sakharuk 3712: #-- <base> tag (end tag forbidden)
1.122     albertel 3713: sub start_base {
                   3714:     my ($target,$token) = @_;
                   3715:     my $currentstring = '';
1.325     albertel 3716:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3717: 	$currentstring = $token->[4];     
1.161     sakharuk 3718:     }
1.122     albertel 3719:     return $currentstring;
                   3720: }
                   3721: 
                   3722: sub end_base {
                   3723:     my ($target,$token) = @_;
                   3724:     my $currentstring = '';
1.325     albertel 3725:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3726: 	$currentstring = $token->[2];    
                   3727:     } 
                   3728:     return $currentstring;
                   3729: }
                   3730: 
1.181     sakharuk 3731: #-- <bdo> tag (end tag required)
1.122     albertel 3732: sub start_bdo {
                   3733:     my ($target,$token) = @_;
                   3734:     my $currentstring = '';
1.325     albertel 3735:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3736: 	$currentstring = $token->[4];     
                   3737:     } 
                   3738:     return $currentstring;
                   3739: }
                   3740: 
                   3741: sub end_bdo {
                   3742:     my ($target,$token) = @_;
                   3743:     my $currentstring = '';
1.325     albertel 3744:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3745: 	$currentstring = $token->[2];    
                   3746:     } 
                   3747:     return $currentstring;
                   3748: }
                   3749: 
1.181     sakharuk 3750: #-- <bgsound> tag (end tag optional)
1.122     albertel 3751: sub start_bgsound {
                   3752:     my ($target,$token) = @_;
                   3753:     my $currentstring = '';
1.325     albertel 3754:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3755: 	$currentstring = $token->[4];     
                   3756:     } 
                   3757:     return $currentstring;
                   3758: }
                   3759: 
                   3760: sub end_bgsound {
                   3761:     my ($target,$token) = @_;
                   3762:     my $currentstring = '';
1.325     albertel 3763:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3764: 	$currentstring = $token->[2];    
                   3765:     } 
                   3766:     return $currentstring;
                   3767: }
                   3768: 
1.181     sakharuk 3769: #-- <blink> tag (end tag required)
1.122     albertel 3770: sub start_blink {
                   3771:     my ($target,$token) = @_;
                   3772:     my $currentstring = '';
1.325     albertel 3773:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3774: 	$currentstring = $token->[4];     
                   3775:     } 
                   3776:     return $currentstring;
                   3777: }
                   3778: 
                   3779: sub end_blink {
                   3780:     my ($target,$token) = @_;
                   3781:     my $currentstring = '';
1.325     albertel 3782:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3783: 	$currentstring = $token->[2];    
                   3784:     } 
                   3785:     return $currentstring;
                   3786: }
                   3787: 
1.181     sakharuk 3788: #-- <blockquote> tag (end tag required)
1.122     albertel 3789: sub start_blockquote {
                   3790:     my ($target,$token) = @_;
1.279     foxr     3791:     my $currentstring = &end_p();	# Close any unclosed <p>
1.325     albertel 3792:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3793: 	$currentstring .= $token->[4];     
1.122     albertel 3794:     } 
1.339     foxr     3795:     if ($target eq 'tex') {
                   3796: 	$currentstring .= '\begin{quote}';
                   3797:     }
1.122     albertel 3798:     return $currentstring;
                   3799: }
                   3800: 
                   3801: sub end_blockquote {
                   3802:     my ($target,$token) = @_;
                   3803:     my $currentstring = '';
1.325     albertel 3804:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3805: 	$currentstring = $token->[2];    
                   3806:     } 
1.339     foxr     3807:     if ($target eq 'tex') {
                   3808: 	$currentstring = '\end{quote}';
                   3809:     }
1.122     albertel 3810:     return $currentstring;
                   3811: }
                   3812: 
1.181     sakharuk 3813: #-- <button> tag (end tag required)
1.122     albertel 3814: sub start_button {
                   3815:     my ($target,$token) = @_;
                   3816:     my $currentstring = '';
1.325     albertel 3817:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3818: 	$currentstring = $token->[4];     
                   3819:     } 
                   3820:     return $currentstring;
                   3821: }
                   3822: 
                   3823: sub end_button {
                   3824:     my ($target,$token) = @_;
                   3825:     my $currentstring = '';
1.325     albertel 3826:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3827: 	$currentstring = $token->[2];    
                   3828:     } 
                   3829:     return $currentstring;
                   3830: }
                   3831: 
1.181     sakharuk 3832: #-- <caption> tag (end tag required)
1.122     albertel 3833: sub start_caption {
                   3834:     my ($target,$token) = @_;
                   3835:     my $currentstring = '';
1.325     albertel 3836:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3837: 	$currentstring = $token->[4];     
                   3838:     } 
                   3839:     return $currentstring;
                   3840: }
                   3841: 
                   3842: sub end_caption {
                   3843:     my ($target,$token) = @_;
                   3844:     my $currentstring = '';
1.325     albertel 3845:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3846: 	$currentstring = $token->[2];    
                   3847:     } 
                   3848:     return $currentstring;
                   3849: }
                   3850: 
1.181     sakharuk 3851: #-- <col> tag (end tag forbdden)
1.122     albertel 3852: sub start_col {
                   3853:     my ($target,$token) = @_;
                   3854:     my $currentstring = '';
1.325     albertel 3855:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3856: 	$currentstring = $token->[4];     
                   3857:     } 
                   3858:     return $currentstring;
                   3859: }
                   3860: 
                   3861: sub end_col {
                   3862:     my ($target,$token) = @_;
                   3863:     my $currentstring = '';
1.325     albertel 3864:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3865: 	$currentstring = $token->[2];    
                   3866:     } 
                   3867:     return $currentstring;
                   3868: }
                   3869: 
1.181     sakharuk 3870: #-- <colgroup> tag (end tag optional)
1.122     albertel 3871: sub start_colgroup {
                   3872:     my ($target,$token) = @_;
                   3873:     my $currentstring = '';
1.325     albertel 3874:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3875: 	$currentstring = $token->[4];     
                   3876:     } 
                   3877:     return $currentstring;
                   3878: }
                   3879: 
                   3880: sub end_colgroup {
                   3881:     my ($target,$token) = @_;
                   3882:     my $currentstring = '';
1.325     albertel 3883:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3884: 	$currentstring = $token->[2];    
                   3885:     } 
                   3886:     return $currentstring;
                   3887: }
                   3888: 
1.416     faziophi 3889: 
1.181     sakharuk 3890: #-- <del> tag (end tag required)
1.122     albertel 3891: sub start_del {
                   3892:     my ($target,$token) = @_;
                   3893:     my $currentstring = '';
1.325     albertel 3894:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3895: 	$currentstring = $token->[4];     
1.416     faziophi 3896:     } elsif ($target eq 'tex') {
                   3897: 	&disable_para();
                   3898: 	$currentstring .= '\st{';  
1.122     albertel 3899:     } 
                   3900:     return $currentstring;
                   3901: }
                   3902: 
                   3903: sub end_del {
                   3904:     my ($target,$token) = @_;
                   3905:     my $currentstring = '';
1.325     albertel 3906:     if ($target eq 'web' || $target eq 'webgrade') {
1.416     faziophi 3907: 	$currentstring = $token->[2];     
                   3908:     } elsif ($target eq 'tex') {
                   3909: 	&enable_para();
                   3910: 	$currentstring = '}';
1.122     albertel 3911:     } 
                   3912:     return $currentstring;
                   3913: }
                   3914: 
1.181     sakharuk 3915: #-- <fieldset> tag (end tag required)
1.122     albertel 3916: sub start_fieldset {
                   3917:     my ($target,$token) = @_;
                   3918:     my $currentstring = '';
1.325     albertel 3919:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3920: 	$currentstring = $token->[4];     
                   3921:     } 
                   3922:     return $currentstring;
                   3923: }
                   3924: 
                   3925: sub end_fieldset {
                   3926:     my ($target,$token) = @_;
                   3927:     my $currentstring = '';
1.325     albertel 3928:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3929: 	$currentstring = $token->[2];    
                   3930:     } 
                   3931:     return $currentstring;
                   3932: }
                   3933: 
1.181     sakharuk 3934: #-- <frame> tag (end tag forbidden)
1.122     albertel 3935: sub start_frame {
                   3936:     my ($target,$token) = @_;
                   3937:     my $currentstring = '';
1.325     albertel 3938:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3939: 	$currentstring = $token->[4];     
                   3940:     } 
                   3941:     return $currentstring;
                   3942: }
                   3943: 
                   3944: sub end_frame {
                   3945:     my ($target,$token) = @_;
                   3946:     my $currentstring = '';
1.325     albertel 3947:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3948: 	$currentstring = $token->[2];    
                   3949:     } 
                   3950:     return $currentstring;
                   3951: }
                   3952: 
1.181     sakharuk 3953: #-- <iframe> tag (end tag required)
1.122     albertel 3954: sub start_iframe {
                   3955:     my ($target,$token) = @_;
                   3956:     my $currentstring = '';
1.325     albertel 3957:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3958: 	$currentstring = $token->[4];     
                   3959:     } 
                   3960:     return $currentstring;
                   3961: }
                   3962: 
                   3963: sub end_iframe {
                   3964:     my ($target,$token) = @_;
                   3965:     my $currentstring = '';
1.325     albertel 3966:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3967: 	$currentstring = $token->[2];    
                   3968:     } 
                   3969:     return $currentstring;
                   3970: }
                   3971: 
1.181     sakharuk 3972: #-- <ins> tag (end tag required)
1.122     albertel 3973: sub start_ins {
                   3974:     my ($target,$token) = @_;
                   3975:     my $currentstring = '';
1.325     albertel 3976:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3977: 	$currentstring = $token->[4];     
                   3978:     } 
                   3979:     return $currentstring;
                   3980: }
                   3981: 
                   3982: sub end_ins {
                   3983:     my ($target,$token) = @_;
                   3984:     my $currentstring = '';
1.325     albertel 3985:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3986: 	$currentstring = $token->[2];    
                   3987:     } 
                   3988:     return $currentstring;
                   3989: }
                   3990: 
1.181     sakharuk 3991: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3992: sub start_isindex {
                   3993:     my ($target,$token) = @_;
                   3994:     my $currentstring = '';
1.325     albertel 3995:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3996: 	$currentstring = $token->[4];     
                   3997:     } 
                   3998:     return $currentstring;
                   3999: }
                   4000: 
                   4001: sub end_isindex {
                   4002:     my ($target,$token) = @_;
                   4003:     my $currentstring = '';
1.325     albertel 4004:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4005: 	$currentstring = $token->[2];    
                   4006:     } 
                   4007:     return $currentstring;
                   4008: }
                   4009: 
1.181     sakharuk 4010: #-- <keygen> tag (end tag forbidden)
1.122     albertel 4011: sub start_keygen {
                   4012:     my ($target,$token) = @_;
                   4013:     my $currentstring = '';
1.325     albertel 4014:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4015: 	$currentstring = $token->[4];     
                   4016:     } 
                   4017:     return $currentstring;
                   4018: }
                   4019: 
                   4020: sub end_keygen {
                   4021:     my ($target,$token) = @_;
                   4022:     my $currentstring = '';
1.325     albertel 4023:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4024: 	$currentstring = $token->[2];    
                   4025:     } 
                   4026:     return $currentstring;
                   4027: }
                   4028: 
                   4029: #-- <label> tag
                   4030: sub start_label {
                   4031:     my ($target,$token) = @_;
                   4032:     my $currentstring = '';
1.325     albertel 4033:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4034: 	$currentstring = $token->[4];     
                   4035:     } 
                   4036:     return $currentstring;
                   4037: }
                   4038: 
                   4039: sub end_label {
                   4040:     my ($target,$token) = @_;
                   4041:     my $currentstring = '';
1.325     albertel 4042:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4043: 	$currentstring = $token->[2];    
                   4044:     } 
                   4045:     return $currentstring;
                   4046: }
                   4047: 
1.181     sakharuk 4048: #-- <layer> tag (end tag required)
1.122     albertel 4049: sub start_layer {
                   4050:     my ($target,$token) = @_;
                   4051:     my $currentstring = '';
1.325     albertel 4052:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4053: 	$currentstring = $token->[4];     
                   4054:     } 
                   4055:     return $currentstring;
                   4056: }
                   4057: 
                   4058: sub end_layer {
                   4059:     my ($target,$token) = @_;
                   4060:     my $currentstring = '';
1.325     albertel 4061:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4062: 	$currentstring = $token->[2];    
                   4063:     } 
                   4064:     return $currentstring;
                   4065: }
                   4066: 
1.181     sakharuk 4067: #-- <legend> tag (end tag required)
1.122     albertel 4068: sub start_legend {
                   4069:     my ($target,$token) = @_;
                   4070:     my $currentstring = '';
1.325     albertel 4071:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4072: 	$currentstring = $token->[4];     
                   4073:     } 
                   4074:     return $currentstring;
                   4075: }
                   4076: 
                   4077: sub end_legend {
                   4078:     my ($target,$token) = @_;
                   4079:     my $currentstring = '';
1.325     albertel 4080:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4081: 	$currentstring = $token->[2];    
                   4082:     } 
                   4083:     return $currentstring;
                   4084: }
                   4085: 
1.181     sakharuk 4086: #-- <link> tag (end tag forbidden)
1.122     albertel 4087: sub start_link {
1.292     albertel 4088:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 4089:     my $currentstring = '';
1.324     albertel 4090:     if ($target eq 'web' || $target eq 'webgrade') {
1.291     albertel 4091: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   4092: 					    undef,1);
                   4093: 	&Apache::lonxml::extlink($href);
1.122     albertel 4094: 	$currentstring = $token->[4];     
                   4095:     } 
                   4096:     return $currentstring;
                   4097: }
                   4098: 
                   4099: sub end_link {
                   4100:     my ($target,$token) = @_;
                   4101:     my $currentstring = '';
1.325     albertel 4102:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4103: 	$currentstring = $token->[2];    
                   4104:     } 
                   4105:     return $currentstring;
                   4106: }
                   4107: 
1.181     sakharuk 4108: #-- <marquee> tag (end tag optional)
1.122     albertel 4109: sub start_marquee {
                   4110:     my ($target,$token) = @_;
                   4111:     my $currentstring = '';
1.325     albertel 4112:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4113: 	$currentstring = $token->[4];     
                   4114:     } 
                   4115:     return $currentstring;
                   4116: }
                   4117: 
                   4118: sub end_marquee {
                   4119:     my ($target,$token) = @_;
                   4120:     my $currentstring = '';
1.325     albertel 4121:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4122: 	$currentstring = $token->[2];    
                   4123:     } 
                   4124:     return $currentstring;
                   4125: }
                   4126: 
1.179     sakharuk 4127: #-- <multicol> tag (end tag required)
                   4128: sub start_multicol {
1.122     albertel 4129:     my ($target,$token) = @_;
1.279     foxr     4130:     my $currentstring = &end_p();	# Close any pending <p>
1.325     albertel 4131:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     4132: 	$currentstring .= $token->[4];     
1.122     albertel 4133:     } 
                   4134:     return $currentstring;
                   4135: }
                   4136: 
1.179     sakharuk 4137: sub end_multicol {
1.122     albertel 4138:     my ($target,$token) = @_;
                   4139:     my $currentstring = '';
1.325     albertel 4140:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4141: 	$currentstring = $token->[2];    
                   4142:     } 
                   4143:     return $currentstring;
                   4144: }
                   4145: 
1.179     sakharuk 4146: #-- <nobr> tag (end tag required)
1.122     albertel 4147: sub start_nobr {
                   4148:     my ($target,$token) = @_;
                   4149:     my $currentstring = '';
1.325     albertel 4150:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4151: 	$currentstring = $token->[4];     
1.179     sakharuk 4152:     }  elsif ($target eq 'tex') {
                   4153: 	$currentstring='\mbox{';
                   4154:     }
1.122     albertel 4155:     return $currentstring;
                   4156: }
                   4157: 
                   4158: sub end_nobr {
                   4159:     my ($target,$token) = @_;
                   4160:     my $currentstring = '';
1.325     albertel 4161:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4162: 	$currentstring = $token->[2];    
1.179     sakharuk 4163:     }   elsif ($target eq 'tex') {
                   4164: 	$currentstring='}';
                   4165:     }
1.122     albertel 4166:     return $currentstring;
                   4167: }
                   4168: 
1.179     sakharuk 4169: #-- <noembed> tag (end tag required)
1.122     albertel 4170: sub start_noembed {
                   4171:     my ($target,$token) = @_;
                   4172:     my $currentstring = '';
1.325     albertel 4173:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4174: 	$currentstring = $token->[4];     
                   4175:     } 
                   4176:     return $currentstring;
                   4177: }
                   4178: 
                   4179: sub end_noembed {
                   4180:     my ($target,$token) = @_;
                   4181:     my $currentstring = '';
1.325     albertel 4182:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4183: 	$currentstring = $token->[2];    
                   4184:     } 
                   4185:     return $currentstring;
                   4186: }
                   4187: 
1.179     sakharuk 4188: #-- <noframes> tag (end tag required)
1.122     albertel 4189: sub start_noframes {
                   4190:     my ($target,$token) = @_;
                   4191:     my $currentstring = '';
1.325     albertel 4192:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4193: 	$currentstring = $token->[4];     
                   4194:     } 
                   4195:     return $currentstring;
                   4196: }
                   4197: 
                   4198: sub end_noframes {
                   4199:     my ($target,$token) = @_;
                   4200:     my $currentstring = '';
1.325     albertel 4201:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4202: 	$currentstring = $token->[2];    
                   4203:     } 
                   4204:     return $currentstring;
                   4205: }
                   4206: 
1.179     sakharuk 4207: #-- <nolayer> tag (end tag required)
1.122     albertel 4208: sub start_nolayer {
                   4209:     my ($target,$token) = @_;
                   4210:     my $currentstring = '';
1.325     albertel 4211:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4212: 	$currentstring = $token->[4];     
                   4213:     } 
                   4214:     return $currentstring;
                   4215: }
                   4216: 
                   4217: sub end_nolayer {
                   4218:     my ($target,$token) = @_;
                   4219:     my $currentstring = '';
1.325     albertel 4220:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4221: 	$currentstring = $token->[2];    
                   4222:     } 
                   4223:     return $currentstring;
                   4224: }
                   4225: 
1.179     sakharuk 4226: #-- <noscript> tag (end tag required)
1.122     albertel 4227: sub start_noscript {
                   4228:     my ($target,$token) = @_;
                   4229:     my $currentstring = '';
1.325     albertel 4230:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4231: 	$currentstring = $token->[4];     
                   4232:     } 
                   4233:     return $currentstring;
                   4234: }
                   4235: 
                   4236: sub end_noscript {
                   4237:     my ($target,$token) = @_;
                   4238:     my $currentstring = '';
1.325     albertel 4239:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4240: 	$currentstring = $token->[2];    
                   4241:     } 
                   4242:     return $currentstring;
                   4243: }
                   4244: 
1.179     sakharuk 4245: #-- <object> tag (end tag required)
1.122     albertel 4246: sub start_object {
                   4247:     my ($target,$token) = @_;
                   4248:     my $currentstring = '';
1.325     albertel 4249:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4250: 	$currentstring = $token->[4];     
                   4251:     } 
                   4252:     return $currentstring;
                   4253: }
                   4254: 
                   4255: sub end_object {
                   4256:     my ($target,$token) = @_;
                   4257:     my $currentstring = '';
1.325     albertel 4258:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4259: 	$currentstring = $token->[2];    
                   4260:     } 
                   4261:     return $currentstring;
                   4262: }
                   4263: 
1.179     sakharuk 4264: #-- <optgroup> tag (end tag required)
1.122     albertel 4265: sub start_optgroup {
                   4266:     my ($target,$token) = @_;
                   4267:     my $currentstring = '';
1.325     albertel 4268:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4269: 	$currentstring = $token->[4];     
                   4270:     } 
                   4271:     return $currentstring;
                   4272: }
                   4273: 
                   4274: sub end_optgroup {
                   4275:     my ($target,$token) = @_;
                   4276:     my $currentstring = '';
1.325     albertel 4277:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4278: 	$currentstring = $token->[2];    
                   4279:     } 
                   4280:     return $currentstring;
                   4281: }
                   4282: 
1.179     sakharuk 4283: #-- <samp> tag (end tag required)
1.122     albertel 4284: sub start_samp {
                   4285:     my ($target,$token) = @_;
                   4286:     my $currentstring = '';
1.325     albertel 4287:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4288: 	$currentstring = $token->[4];     
1.179     sakharuk 4289:     } elsif ($target eq 'tex') {
                   4290: 	$currentstring='\texttt{';
                   4291:     }
1.122     albertel 4292:     return $currentstring;
                   4293: }
                   4294: 
                   4295: sub end_samp {
                   4296:     my ($target,$token) = @_;
                   4297:     my $currentstring = '';
1.325     albertel 4298:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4299: 	$currentstring = $token->[2];    
1.179     sakharuk 4300:     } elsif ($target eq 'tex') {
                   4301: 	$currentstring='}';
                   4302:     }
1.122     albertel 4303:     return $currentstring;
                   4304: }
                   4305: 
                   4306: #-- <server> tag
                   4307: sub start_server {
                   4308:     my ($target,$token) = @_;
                   4309:     my $currentstring = '';
1.325     albertel 4310:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4311: 	$currentstring = $token->[4];     
                   4312:     } 
                   4313:     return $currentstring;
                   4314: }
                   4315: 
                   4316: sub end_server {
                   4317:     my ($target,$token) = @_;
                   4318:     my $currentstring = '';
1.325     albertel 4319:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4320: 	$currentstring = $token->[2];    
                   4321:     } 
                   4322:     return $currentstring;
                   4323: }
                   4324: 
1.179     sakharuk 4325: #-- <spacer> tag (end tag forbidden)
1.122     albertel 4326: sub start_spacer {
                   4327:     my ($target,$token) = @_;
1.279     foxr     4328:     my $currentstring = &end_p();	# Close off any open <p> tag.
1.325     albertel 4329:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     4330: 	$currentstring .= $token->[4];     
1.122     albertel 4331:     } 
                   4332:     return $currentstring;
                   4333: }
                   4334: 
                   4335: sub end_spacer {
                   4336:     my ($target,$token) = @_;
                   4337:     my $currentstring = '';
1.325     albertel 4338:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4339: 	$currentstring = $token->[2];    
                   4340:     } 
                   4341:     return $currentstring;
                   4342: }
                   4343: 
1.179     sakharuk 4344: #-- <span> tag (end tag required)
1.122     albertel 4345: sub start_span {
                   4346:     my ($target,$token) = @_;
                   4347:     my $currentstring = '';
1.325     albertel 4348:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4349: 	$currentstring = $token->[4];     
                   4350:     } 
                   4351:     return $currentstring;
                   4352: }
                   4353: 
                   4354: sub end_span {
                   4355:     my ($target,$token) = @_;
                   4356:     my $currentstring = '';
1.325     albertel 4357:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4358: 	$currentstring = $token->[2];    
                   4359:     } 
                   4360:     return $currentstring;
                   4361: }
                   4362: 
1.179     sakharuk 4363: #-- <tbody> tag (end tag optional)
1.122     albertel 4364: sub start_tbody {
                   4365:     my ($target,$token) = @_;
                   4366:     my $currentstring = '';
1.325     albertel 4367:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4368: 	$currentstring = $token->[4];     
                   4369:     } 
                   4370:     return $currentstring;
                   4371: }
                   4372: 
                   4373: sub end_tbody {
                   4374:     my ($target,$token) = @_;
                   4375:     my $currentstring = '';
1.325     albertel 4376:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4377: 	$currentstring = $token->[2];    
                   4378:     } 
                   4379:     return $currentstring;
                   4380: }
                   4381: 
1.166     sakharuk 4382: #-- <tfoot> tag (end tag optional)
1.122     albertel 4383: sub start_tfoot {
                   4384:     my ($target,$token) = @_;
                   4385:     my $currentstring = '';
1.325     albertel 4386:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4387: 	$currentstring = $token->[4];     
                   4388:     } 
                   4389:     return $currentstring;
                   4390: }
                   4391: 
                   4392: sub end_tfoot {
                   4393:     my ($target,$token) = @_;
                   4394:     my $currentstring = '';
1.325     albertel 4395:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4396: 	$currentstring = $token->[2];    
                   4397:     } 
                   4398:     return $currentstring;
                   4399: }
                   4400: 
1.166     sakharuk 4401: #-- <thead> tag (end tag optional)
1.122     albertel 4402: sub start_thead {
                   4403:     my ($target,$token) = @_;
                   4404:     my $currentstring = '';
1.325     albertel 4405:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4406: 	$currentstring = $token->[4];     
                   4407:     } 
                   4408:     return $currentstring;
                   4409: }
1.10      www      4410: 
1.122     albertel 4411: sub end_thead {
                   4412:     my ($target,$token) = @_;
                   4413:     my $currentstring = '';
1.325     albertel 4414:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4415: 	$currentstring = $token->[2];    
                   4416:     } 
                   4417:     return $currentstring;
                   4418: }
1.119     www      4419: 
1.122     albertel 4420: #-- <var> tag
                   4421: sub start_var {
1.44      sakharuk 4422:     my ($target,$token) = @_;
                   4423:     my $currentstring = '';
1.325     albertel 4424:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4425: 	$currentstring = $token->[4];     
1.163     sakharuk 4426:     } elsif ($target eq 'tex') {
                   4427: 	$currentstring = '\textit{'; 
                   4428:     }
1.44      sakharuk 4429:     return $currentstring;
                   4430: }
1.10      www      4431: 
1.122     albertel 4432: sub end_var {
                   4433:     my ($target,$token) = @_;
1.44      sakharuk 4434:     my $currentstring = '';
1.325     albertel 4435:     if ($target eq 'web' || $target eq 'webgrade') {
1.163     sakharuk 4436: 	$currentstring = $token->[2];
                   4437:     } elsif ($target eq 'tex') {
                   4438: 	$currentstring = '}'; 
1.44      sakharuk 4439:     } 
                   4440:     return $currentstring;
                   4441: }
1.119     www      4442: 
1.163     sakharuk 4443: #-- <wbr> tag (end tag forbidden)
1.122     albertel 4444: sub start_wbr {
                   4445:     my ($target,$token) = @_;
                   4446:     my $currentstring = '';
1.325     albertel 4447:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4448: 	$currentstring = $token->[4];     
                   4449:     } 
                   4450:     return $currentstring;
1.98      albertel 4451: }
                   4452: 
1.122     albertel 4453: sub end_wbr {
                   4454:     my ($target,$token) = @_;
                   4455:     my $currentstring = '';
1.325     albertel 4456:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4457: 	$currentstring = $token->[2];    
                   4458:     } 
                   4459:     return $currentstring;
1.98      albertel 4460: }
1.134     sakharuk 4461: 
                   4462: #-- <hideweboutput> tag
                   4463: sub start_hideweboutput {
                   4464:     my ($target,$token) = @_;
1.325     albertel 4465:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4466: 	&Apache::lonxml::startredirection();     
                   4467:     } 
                   4468:     return '';
                   4469: }
                   4470: 
                   4471: sub end_hideweboutput {
                   4472:     my ($target,$token) = @_;
                   4473:     my $currentstring = '';
1.325     albertel 4474:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4475: 	$currentstring = &Apache::lonxml::endredirection();    
                   4476:     } 
                   4477:     return '';
                   4478: }
                   4479: 
1.94      sakharuk 4480: 
                   4481: sub image_replication {
                   4482:     my $src = shift;
1.187     albertel 4483:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   4484:     #replicates eps or ps 
                   4485:     my $epssrc = my $pssrc = $src;
                   4486:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   4487:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   4488:     if (not -e $epssrc && not -e $pssrc) {
                   4489: 	my $result=&Apache::lonnet::repcopy($epssrc);
1.264     raeburn  4490: 	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 4491:     }
                   4492:     return '';
1.195     sakharuk 4493: }
1.397     jms      4494: 
                   4495: 
                   4496: 
1.275     foxr     4497: sub resize_image {
                   4498:     my ($height_param, $width_param, $scaling,
                   4499: 	$parstack, $safeeval, $depth, $cis) = @_;
                   4500: 
                   4501:     # First apply the scaling...
1.271     foxr     4502: 
1.275     foxr     4503:     $height_param = $height_param * $scaling;
                   4504:     $width_param  = $width_param  * $scaling;
1.261     foxr     4505: 
1.197     sakharuk 4506:     #do we have any specified LaTeX size of the picture?
1.261     foxr     4507:     my $toget='TeXwidth'; 
                   4508:     if ($cis) { 
                   4509: 	$toget=lc($toget); 
                   4510:     }
1.256     albertel 4511:     my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
                   4512: 					      $safeeval,$depth,$cis);
                   4513:     $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
                   4514:     my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
                   4515: 					       $safeeval,$depth,$cis);
1.197     sakharuk 4516:     #do we have any specified web size of the picture?
                   4517:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
1.256     albertel 4518: 					   $depth,1);
                   4519:     if ($TeXwidth) { 
1.252     matthew  4520: 	my $old_width_param=$width_param;
1.197     sakharuk 4521: 	if ($TeXwidth=~/(\d+)\s*\%/) {
1.267     albertel 4522: 	    $width_param = $1*$env{'form.textwidth'}/100;
1.197     sakharuk 4523: 	} else { 
                   4524: 	    $width_param = $TeXwidth;
                   4525: 	}
1.266     albertel 4526: 	if ($TeXheight) {
                   4527: 	    $height_param = $TeXheight;
                   4528: 	} elsif ($old_width_param) {
                   4529: 	    $height_param=$TeXwidth/$old_width_param*$height_param;
                   4530: 	}
1.256     albertel 4531:     } elsif ($TeXheight) {
1.248     foxr     4532: 	$height_param = $TeXheight;
1.266     albertel 4533: 	if ($height_param) {
                   4534: 	    $width_param  = $TeXheight/$height_param*$width_param;
                   4535: 	}
1.256     albertel 4536:     } elsif ($width) {
1.252     matthew  4537: 	my $old_width_param=$width_param;
1.256     albertel 4538: 	$width_param = $width*$scaling;
1.266     albertel 4539: 	if ($old_width_param) {
                   4540: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4541: 	}
1.252     matthew  4542:     }
1.267     albertel 4543:     if ($width_param > $env{'form.textwidth'}) {
1.252     matthew  4544:         my $old_width_param=$width_param;
1.267     albertel 4545: 	$width_param =0.95*$env{'form.textwidth'};
1.266     albertel 4546: 	if ($old_width_param) {
                   4547: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4548: 	}
1.197     sakharuk 4549:     }
1.275     foxr     4550: 
                   4551:     return ($height_param, $width_param);
                   4552: }
                   4553: 
                   4554: sub image_size {
                   4555:     my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
                   4556: 
                   4557:     #size of image from gif/jpg/jpeg/png 
                   4558:     my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   4559:     if (-e $ressrc) {
                   4560: 	$src = $ressrc;
                   4561:     }
                   4562:     my $image = Image::Magick->new;
                   4563:     my $current_figure = $image->Read($src);
                   4564:     my $width_param = $image->Get('width');
                   4565:     my $height_param = $image->Get('height');
                   4566:     &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
                   4567:     undef($image);
                   4568: 
                   4569:     ($height_param, $width_param) = &resize_image($height_param, $width_param,
                   4570: 						  $scaling, $parstack, $safeeval, 
                   4571: 						  $depth, $cis);
                   4572: 
1.248     foxr     4573:     return ($height_param, $width_param);
                   4574: }
                   4575: 
                   4576: sub image_width {
                   4577:     my ($height, $width) = &image_size(@_);
                   4578:     return $width;
                   4579: }
                   4580: #  Not yet 100% sure this is correct in all circumstances..
                   4581: #  due to my uncertainty about mods to image_size.
                   4582: #
                   4583: sub image_height {
                   4584:     my ($height, $width) = &image_size(@_);
                   4585:     return $height;
1.197     sakharuk 4586: }
                   4587: 
1.256     albertel 4588: sub get_eps_image {
                   4589:     my ($src)=@_;
1.261     foxr     4590:     my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
1.285     foxr     4591: 
                   4592:     # In order to prevent the substitution of the alt text, we need to
                   4593:     # be sure the orig_src file is on system now so:
                   4594: 
                   4595:     if (! -e $orig_src) {
                   4596: 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
                   4597:     }
1.275     foxr     4598:     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
1.390     foxr     4599:     my ($spath, $sname, $sext) = &fileparse($src, qr/\.(bmp|gif|png|jpg|jpeg)/i);
                   4600:     $src=~s/\.(bmp|gif|png|jpg|jpeg)$/\.eps/i;
1.256     albertel 4601:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.275     foxr     4602:     &Apache::lonxml::debug("Filelocation gives: $src");
1.256     albertel 4603:     if (! -e $src) {
1.261     foxr     4604: 	&Apache::lonxml::debug("$src does not exist");
1.264     raeburn  4605: 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
1.261     foxr     4606: 	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
1.256     albertel 4607: 	    #if replication failed try to find ps file
                   4608: 	    $src=~s/\.eps$/\.ps/;
1.261     foxr     4609: 	    &Apache::lonxml::debug("Now looking for $src");
1.270     foxr     4610: 	    #if no ps file try to replicate it.
                   4611: 	    my $didrepcopy = &Apache::lonnet::repcopy($src);
                   4612: 	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
                   4613: 	    if ( (not -e $src) ||
                   4614: 		($didrepcopy ne 'ok')) {
1.261     foxr     4615: 		&Apache::lonxml::debug("Failed to find or replicate $src");
                   4616: 
1.256     albertel 4617: 		#if replication failed try to produce eps file dynamically
                   4618: 		$src=~s/\.ps$/\.eps/;
                   4619: 		my $temp_file;
1.267     albertel 4620: 		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.256     albertel 4621: 		my $newsrc=$orig_src;
                   4622: 		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
1.275     foxr     4623: 		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
1.344     albertel 4624: 		print FILE ("$newsrc\n");
                   4625: 		close(FILE);
1.256     albertel 4626: 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4627: 		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.283     albertel 4628: 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
                   4629: 		    $src =~ s/\.eps$/$sext.eps/;
                   4630: 		}
1.341     foxr     4631: 
1.256     albertel 4632: 	    }
1.343     foxr     4633: 
1.256     albertel 4634: 	}
1.341     foxr     4635:     } else {
                   4636: 	# If the postscript file has spaces in its name,
                   4637: 	# LaTeX will gratuitiously vomit.  Therefore
                   4638: 	# queue such files for copy with " " replaced by "_".
                   4639: 	# printout.pm will know them by their .ps  or .eps extensions.
                   4640: 	my $newsrc = $orig_src;
                   4641: 	$newsrc    =~  s|(.*)/res/|/home/httpd/html/res/|;
                   4642: 	open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.343     foxr     4643: 	print FILE "$src\n";
1.341     foxr     4644: 	close FILE;
                   4645: 	$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4646: 	$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.256     albertel 4647:     }
                   4648:     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
1.344     albertel 4649:     $path =~ s/ /\_/g;
1.343     foxr     4650:     $file =~ s/ /\_/g;
1.261     foxr     4651:     &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
1.256     albertel 4652:     return ($path.'/',$file);
                   4653: }
                   4654: 
1.195     sakharuk 4655: sub eps_generation {
                   4656:     my ($src,$file,$width_param) = @_;	     
1.267     albertel 4657:     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
1.195     sakharuk 4658:     my $temp_file = Apache::File->new('>>'.$filename); 
                   4659:     print $temp_file "$src\n";
                   4660:     my $newsrc = $src;
1.390     foxr     4661:     $newsrc =~ s/(\.bmp|\.gif|\.jpg|\.jpeg)$/\.eps/i;
1.345     albertel 4662:     $newsrc=~s{/home/httpd/html/res}{};
                   4663:     $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
                   4664:     $newsrc=~s{/\./}{/};
                   4665:     $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
                   4666:     if ($newsrc=~m{/home/httpd/lonUsers/}) {
                   4667: 	$newsrc=~s{/home/httpd/lonUsers}{};
                   4668: 	$newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
1.213     sakharuk 4669:     }
1.345     albertel 4670:     if ($newsrc=~m{/userfiles/}) {
1.239     sakharuk 4671: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4672:     } else {
                   4673: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4674:     }
1.197     sakharuk 4675: }
                   4676: 
                   4677: sub file_path {     
                   4678:     my $src=shift;
                   4679:     my ($file,$path); 
                   4680:     if ($src =~ m!(.*)/([^/]*)$!) {
                   4681: 	$file = $2; 
                   4682: 	$path = $1.'/'; 
                   4683:     } 
                   4684:     return $file,$path;
1.126     sakharuk 4685: }
1.397     jms      4686: 
                   4687: 
1.126     sakharuk 4688: sub recalc {
                   4689:     my $argument = shift;
                   4690:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 4691:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 4692:     my $value=$1;
                   4693:     my $units=$2;
                   4694:     if ($units eq 'cm') {
                   4695: 	$value*=10;
                   4696:     } elsif ($units eq 'in') {
                   4697: 	$value*=25.4;
                   4698:     } elsif ($units eq 'pc') {
                   4699: 	$value*=(25.4*12/72.27);
                   4700:     } elsif ($units eq 'pt') {
                   4701: 	$value*=(25.4/72.27);
                   4702:     }
                   4703:     return $value.' mm';
1.94      sakharuk 4704: }
1.184     sakharuk 4705: 
                   4706: sub LATEX_length {
                   4707:     my $garbage=shift;
1.206     sakharuk 4708:     $garbage=~s/^\s+$//;
                   4709:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   4710:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   4711:     $garbage=~s/(\s)+/$1/;#only one space
                   4712:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   4713:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   4714:     $garbage=~s/([^\\])\$/$1/g;#$
                   4715:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   4716:    $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 4717:     $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;
                   4718:     $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;
                   4719:     $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 4720:     $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;
                   4721:     $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;
                   4722:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   4723:     #remove some other LaTeX command
                   4724:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   4725:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   4726:     $garbage=~s|\+|11|g;
1.184     sakharuk 4727:     my  $value=length($garbage);
                   4728:     return $value;
                   4729: }
                   4730: 
1.397     jms      4731: 
1.353     foxr     4732: sub align_latex_image {
                   4733:     my ($align, $latex_rendering, $image, $width, $height) = @_;
1.354     foxr     4734:     my $currentstring;        # The 1/2 wrapped image.
                   4735:     my $closure;              # The closure of the wrappage.
1.379     albertel 4736: 
                   4737:     # if it's none just return it back
                   4738:     if ($latex_rendering eq 'none') {
                   4739: 	return ($image,'');
                   4740:     }
                   4741: 
1.353     foxr     4742:     #    If there's an alignment specification we need to honor it here.
                   4743:     #    For the horizontal alignments, we will also honor the
                   4744:     #    value of the latex specfication.  The default is parbox,
                   4745:     #    and that's used for illegal values too.  
                   4746:     #    
                   4747:     #    Even though we set a default alignment value, the user
                   4748:     #    could have given us an illegal value.  In that case we
                   4749:     #    just use the default alignment of bottom..
1.415     foxr     4750:     $currentstring = '';
1.353     foxr     4751:     if      ($align eq "top")    {
1.354     foxr     4752: 	$currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
                   4753: 	$closure = '}';
1.353     foxr     4754:     } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
                   4755: 	my $offset = $height/2;
1.354     foxr     4756: 	$currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
                   4757: 	$closure       = '}';
1.353     foxr     4758:     } elsif ($align eq "left")   { 
                   4759: 	if ($latex_rendering eq "parpic") { 
1.354     foxr     4760: 	    $currentstring .= '\parpic[l]{'.$image;
                   4761: 	    $closure       = '}';
1.353     foxr     4762: 	} elsif ($latex_rendering eq "parbox") {
1.354     foxr     4763: 	    $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
                   4764: 		.$image;
                   4765: 	    $closure = '\end{minipage}';
1.353     foxr     4766: 	} elsif ($latex_rendering eq "wrapfigure"
                   4767: 		 || $latex_rendering ne 'none') {  # wrapfig render
1.354     foxr     4768: 	    $currentstring .= 
1.353     foxr     4769: 		'\begin{wrapfigure}{l}{'.$width.'mm}'
1.354     foxr     4770: 		.'\scalebox{1.0}{'.$image;
                   4771: 	    $closure = '}\end{wrapfigure}';
1.353     foxr     4772: 	}
                   4773:     } elsif ($align eq "right")  {   
                   4774: 	if ($latex_rendering eq "parpic") {
1.354     foxr     4775: 	    $currentstring .= '\parpic[r]{'.$image;
                   4776: 	    $closure = '}';
1.353     foxr     4777: 	} elsif ($latex_rendering eq "parbox") {
1.354     foxr     4778: 	    $currentstring .=  '\begin{minipage}[r]{'.$width.'mm}'
                   4779: 		.$image;
                   4780: 	    $closure = '\end{minipage}';
1.353     foxr     4781: 	} elsif ($latex_rendering eq "wrapfigure"
                   4782: 		 || $latex_rendering ne 'none') {  # wrapfig render
1.354     foxr     4783: 	    $currentstring .= 
1.353     foxr     4784: 		'\begin{wrapfigure}{r}{'.$width.'mm}'
1.354     foxr     4785: 		.'\scalebox{1.0}{'.$image;
                   4786: 	    $closure = '}\end{wrapfigure}';
1.353     foxr     4787: 	}
                   4788:     } else {		# Bottom is also default.
                   4789: 	# $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
1.354     foxr     4790: 	$currentstring .= "{$image";
                   4791: 	$closure       = '}';
1.353     foxr     4792:     }
1.354     foxr     4793:     return ($currentstring, $closure);
1.353     foxr     4794: }
1.184     sakharuk 4795: 
1.397     jms      4796: 
1.287     foxr     4797: sub is_inside_of {
                   4798:     my ($tagstack, $tag) = @_;
                   4799:     my @stack = @$tagstack;
                   4800:     for (my $i = ($#stack - 1); $i >= 0; $i--) {
                   4801: 	if ($stack[$i] eq $tag) {
                   4802: 	    return 1;
                   4803: 	}
                   4804:     }
                   4805:     return 0;
                   4806: }
1.184     sakharuk 4807: 
1.94      sakharuk 4808: 
1.399     foxr     4809: #
                   4810: #   This sub provides the typical LaTeX prefix matter for tex output:
                   4811: #
1.414     raeburn  4812: sub latex_header {
1.402     foxr     4813:     my ($mode) = @_;
1.399     foxr     4814:     my $currentstring = '';
                   4815: 
                   4816:     $currentstring .= 
1.402     foxr     4817: 	"\n% &Apache::lonxml::londefdef \n" .
1.399     foxr     4818: 	'\documentclass[letterpaper,twoside]{article}\raggedbottom';
                   4819:     if (($env{'form.latex_type'}=~'batchmode') ||
1.402     foxr     4820: 	(!$env{'request.role.adv'}) || 
                   4821: 	($mode eq 'batchmode')) {$currentstring .='\batchmode';} 
1.399     foxr     4822:     $currentstring .= '\newcommand{\keephidden}[1]{}'.
                   4823: 	'\renewcommand{\deg}{$^{\circ}$}'.
                   4824: 	'\usepackage{multirow}'.
                   4825: 	'\usepackage{longtable}'.
                   4826: 	'\usepackage{textcomp}'.
                   4827: 	'\usepackage{makeidx}'.
                   4828: 	'\usepackage[dvips]{graphicx}'.
                   4829: 	'\usepackage{wrapfig}'.
                   4830: 	'\usepackage{picins}'.
                   4831: 	'\usepackage[T1]{fontenc}'."\n".
                   4832: 	'\usepackage{lmodern}'."\n".
                   4833: 	'\usepackage[postscript]{ucs}'."\n".
                   4834: 	'\usepackage[utf8x]{inputenc}'."\n".
                   4835: 	'\usepackage{pifont}' ."\n".
                   4836: 	'\usepackage{latexsym}'."\n".
                   4837: 	'\usepackage{epsfig}'.
                   4838: 	"\\usepackage{xtab}\n".
                   4839: 	"\\usepackage{tabularx}\n".
                   4840: 	"\\usepackage{booktabs}\n".
                   4841: 	"\\usepackage{array}\n".
                   4842: 	"\\usepackage{colortbl}\n".
                   4843: 	"\\usepackage{xcolor}\n".
                   4844: 	'\usepackage{calc}'.
                   4845: 	'\usepackage{amsmath}'.
1.416     faziophi 4846:     '\usepackage{soul}',
1.399     foxr     4847: 	'\usepackage{amssymb}'.
                   4848: 	'\usepackage{amsfonts}'.
                   4849: 	'\usepackage{amsthm}'.
1.402     foxr     4850: 	'\usepackage{amscd}'
                   4851:         .'\usepackage{picins}\usepackage{calc}'."\n". # From lonprintout.pm
                   4852: 	'\usepackage[T1]{fontenc}'."\n".
                   4853: 	'\usepackage{lmodern}'."\n".
                   4854: 	'\usepackage[postscript]{ucs}'."\n".
                   4855: 	'\usepackage[utf8x]{inputenc}'."\n".
                   4856: 	'\usepackage{pifont}'  . "\n";
                   4857: 	
1.399     foxr     4858:     if($env{'form.pdfFormFields'} eq 'yes') {
                   4859: 	$currentstring .= '\usepackage{hyperref}'.
                   4860: 	    '\usepackage{eforms}'.
                   4861: 	    '\usepackage{tabularx}';
                   4862:     } 
                   4863:     
                   4864:         $currentstring .= '\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}}'.
                   4865:                           '\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}}';
1.402     foxr     4866:     $currentstring .= '\begin{document}';
1.399     foxr     4867:     
                   4868:     return $currentstring;
                   4869: 
                   4870: }
                   4871: 
1.397     jms      4872: =pod
                   4873: 
                   4874: =head1 NAME
                   4875: 
                   4876: Apache::londefdef.pm
                   4877: 
                   4878: =head1 SYNOPSIS
                   4879: 
                   4880: Tags Default Definition Module
                   4881: 
                   4882: This is part of the LearningOnline Network with CAPA project
                   4883: described at http://www.lon-capa.org.
                   4884: 
                   4885: 
                   4886: =head1 NOTABLE SUBROUTINES
                   4887: 
                   4888: =over
                   4889: 
                   4890: =item start_hideweboutput()
                   4891: 
                   4892: =item end_hideweboutput()
                   4893: 
                   4894: =item image_replication()
                   4895: 
                   4896: =item resize_image()
                   4897: 
                   4898: 	Get correct sizing parameter for an image given
                   4899: 	it's initial ht. and wid.  This allows sizing of
                   4900: 	images that are generated on-the-fly (e.g. gnuplot)
                   4901: 	as well as serving as a utility for image_size.
                   4902:  
                   4903: 	Parameter:
                   4904:         height_param
                   4905:         width_param    - Initial picture dimensions.
                   4906:         scaling        - A scale factor.
                   4907:         parstack,      - the current stack of tag attributes 
                   4908:                          from the xml parser
                   4909:         safeeval,      - pointer to the safespace
                   4910:         depth,         - from what level in the stack to look for attributes
                   4911:                          (assumes -1 if unspecified)
                   4912:         cis            - look for attrubutes case insensitively
                   4913:                          (assumes false)
                   4914: 
                   4915: 	Returns:
                   4916: 		height, width   - new dimensions.
                   4917: 
                   4918: =item image_size()
                   4919: 
                   4920: =item image_width()
                   4921: 
                   4922: =item image_height()
                   4923: 
                   4924: =item get_eps_image()
                   4925: 
                   4926: =item eps_generation()
                   4927: 
                   4928: =item file_path()
                   4929: 
                   4930: =item recalc()
                   4931: 
                   4932: 	Converts a measurement in to mm from any of 
                   4933: 	the other valid LaTeX units of measure.
                   4934: 	If the units of measure are missing from the 
                   4935: 	parameter, it is assumed to be in and returned
                   4936: 	with mm units of measure
                   4937: 
                   4938: =item LATEX_length()
                   4939: 
                   4940: =item align_latex_image()
                   4941: 
                   4942:   	Wrap image 'stuff' inside of the LaTeX required to implement 
                   4943:    	alignment:
                   4944:      	align_tex_image(align, latex_rendering, image)
                   4945:    	Where:
                   4946:      	align   - The HTML alignment specification.
                   4947:      	latex_rendering - rendering hint for latex.
                   4948:      	image   - The LaTeX needed to insert the image itsef.
                   4949:      	width,height - dimensions of the image.
                   4950:  	Returns:
                   4951:     	The 1/2 wrapped image and the stuff required to close the
                   4952:     	wrappage.  This allows e.g. randomlabel to insert more stuff
                   4953:     	into the closure.
                   4954: 
                   4955: 
                   4956: =item is_inside_of($tagstack, $tag)
                   4957:    	This sub returns true if the current state of Xml processing is inside of the tag.   
                   4958: 	Parameters:
                   4959:     	tagstack   - The tagstack from the parser.
                   4960:     	tag        - The tag (without the <>'s.).
                   4961: 	Sample usage:
                   4962:     	if (is_inside_of($tagstack "table")) {
                   4963:      	   I'm in a table....
                   4964:      	}
                   4965: 
                   4966: 
                   4967: 
                   4968: =back
                   4969: 
                   4970: =cut
                   4971: 
                   4972: 
1.1       sakharuk 4973: 1;
                   4974: __END__

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