Annotation of loncom/xml/londefdef.pm, revision 1.413

1.1       sakharuk    1: # The LearningOnline Network with CAPA
                      2: # Tags Default Definition Module 
                      3: #
1.413   ! droeschl    4: # $Id: londefdef.pm,v 1.412 2009/10/15 22:39:58 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);
                   2051: 
                   2052: 	# The only thing that needs any figuring out is the width.. and then only if it is
                   2053: 	# a percent. If not it's assumed to be some valid TeX measurement unit e.g. 3.0cm
                   2054: 	#
                   2055: 
                   2056: 	my $table = new Apache::lontable();
                   2057: 	if ($border ne '') {
                   2058: 	    $table->table_border(1);
                   2059: 	    $table->cell_border(1);
                   2060: 	}
                   2061: 	if ($theme ne '') {
                   2062: 	    $table->theme($theme);
                   2063: 	}
                   2064: 	if ($align ne '') {
                   2065: 	    $table->alignment($align);
                   2066: 	}
                   2067: 
                   2068: 	# Missing width is most of page width
                   2069: 
                   2070: 	if ($width eq "") {
                   2071: 	    $width = '70%';
                   2072: 	}
                   2073: 	
                   2074: 	# If a percentage, need to calculate what this means in terms of
                   2075: 	# page width:
                   2076: 	
                   2077: 	if ($width =~ /%$/) {
                   2078: 	    my $textwidth = &recalc($env{'form.textwidth'});  # Page width in mm.
                   2079: 	    $width =~ s/%//;
                   2080: 	    $width = $width * $textwidth / 100.0;
                   2081: 	    $width .= " mm";
                   2082: 	    $table->width($width);
                   2083: 	}
                   2084: 
                   2085: 	push(@Apache::londefdef::table, $table);
                   2086:         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
                   2087: 
                   2088: 	#--------------------------------------------------------
                   2089: 	#  Old table code here.
                   2090: 	#--------------------------------------------------------
                   2091: 
                   2092: 
                   2093: 	if (0) {
1.344     albertel 2094: 	push(@Apache::londefdef::table, {}); 
1.91      sakharuk 2095: 	$Apache::londefdef::table[-1]{'row_number'} = -1;
1.222     sakharuk 2096:         #maximum table's width (default coincides with text line length)
1.206     sakharuk 2097: 	if ($#Apache::londefdef::table==0) {
1.267     albertel 2098: 	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1.206     sakharuk 2099: 	    $textwidth=~/(\d+\.?\d*)/;
1.358     foxr     2100: 	    $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
1.206     sakharuk 2101: 	} else {
                   2102: 	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
                   2103: 		#the maximum width of nested table is determined by LATeX width of parent cell
                   2104: 		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
                   2105: 	    } else {
                   2106:               #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1.228     sakharuk 2107: 		$textwidth=$Apache::londefdef::table[-2]{'width'};
1.206     sakharuk 2108: 		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
                   2109: 		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
                   2110: 		}
                   2111: 	    }
                   2112: 	}
1.294     foxr     2113: 
                   2114: 	# width either comes forced from the TeXwidth or the width parameters.
                   2115: 	# in either case it can be a percentage or absolute width.
1.311     albertel 2116: 	# in the width case we ignore absolute width 
1.126     sakharuk 2117: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1.308     albertel 2118: 	if (!defined($TeXwidth)) {
1.311     albertel 2119: 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
                   2120: 						       $safeeval,undef,1);
                   2121: 	    if ($htmlwidth =~ /%/) {
                   2122: 		$TeXwidth = $htmlwidth;
                   2123: 	    } else { 
                   2124: 		$TeXwidth = $textwidth;
                   2125: 	    }
1.364     foxr     2126: 	}
                   2127: 	# if the width is specified as a % it is converted to an absolute width.
                   2128: 	# otherwise.. just plugged right in the hash
                   2129: 
1.294     foxr     2130: 	if ($TeXwidth=~/%/) {
1.126     sakharuk 2131: 	    $TeXwidth=~/(\d+)/;
1.206     sakharuk 2132:             $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1.126     sakharuk 2133: 	} else {
1.206     sakharuk 2134: 	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1.316     foxr     2135: 	}
                   2136:         #  In the end, however the table width cannot be wider than $textwidth...
                   2137: 	
                   2138: 	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
                   2139: 	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
                   2140: 	}
1.126     sakharuk 2141:         #table's border
1.206     sakharuk 2142: 	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
1.208     sakharuk 2143:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.91      sakharuk 2144: 	unless (defined $border) { $border = 0; }
                   2145: 	if ($border) { 
                   2146: 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
                   2147: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2148: 	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
                   2149: 	} else {
                   2150: 	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
                   2151: 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
                   2152: 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
                   2153: 	}
1.206     sakharuk 2154: 	if ($#Apache::londefdef::table==0) {
1.281     foxr     2155: 	    #    Note that \newline seems to destroy the alignment envs.
                   2156: 	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
                   2157: 	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1.206     sakharuk 2158: 	}
                   2159: 	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
                   2160:         $Apache::londefdef::table[-1]{'TeXlen'}=[];
                   2161:         $Apache::londefdef::table[-1]{'objectlen'}=[];
1.229     sakharuk 2162:         $Apache::londefdef::table[-1]{'objectsignal'}=[];
1.206     sakharuk 2163:         $Apache::londefdef::table[-1]{'maxlen'}=[];
                   2164:         $Apache::londefdef::table[-1]{'minlen'}=[];
                   2165:         $Apache::londefdef::table[-1]{'content'}=[];
                   2166:         $Apache::londefdef::table[-1]{'align'}=[];
1.340     foxr     2167:         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
1.398     foxr     2168:     }
1.294     foxr     2169: 
                   2170:     }
1.91      sakharuk 2171:     return $currentstring;
                   2172: }
1.122     albertel 2173:  
                   2174: sub end_table {
                   2175:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2176:     my $currentstring = '';
1.325     albertel 2177:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2178: 	$currentstring = $token->[2];     
                   2179:     } elsif ($target eq 'tex') {
1.398     foxr     2180: 
                   2181: 
                   2182: 	#  New table code:
                   2183: 
                   2184: 	my $table = pop(@Apache::londefdef::table);
                   2185: 	my $t     = $table->generate();
                   2186: 	$currentstring = $t->generate_string();
                   2187: 	&enable_para();
                   2188: 	#--------------------------------------------------------------
                   2189: 	#  Old table code:
                   2190: 	#--------------------------------------------------------------
                   2191: 
                   2192: 	if (0) {
                   2193: 
1.372     foxr     2194: 	my $border =  &Apache::lonxml::get_param('border',$parstack,$safeeval);
1.122     albertel 2195: 	my $inmemory = '';
                   2196: 	my $output = '';
1.206     sakharuk 2197: 	my $WARNING='';
                   2198:         #width of columns from TeXwidth attributes
1.294     foxr     2199: 
1.384     foxr     2200: 	# Protect against unbalanced </table> tag.
                   2201: 
                   2202: 	if (scalar(@Apache::londefdef::table) > 0) {
                   2203: 
1.206     sakharuk 2204: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2205: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2206: 		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
                   2207: 		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
                   2208: 		}	
                   2209: 	    }
                   2210: 	}
                   2211:         #free space and number of empty columns
                   2212: 	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1.228     sakharuk 2213: 	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
1.206     sakharuk 2214: 	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2215: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
                   2216: 		$empty_columns++;
                   2217: 	    } else {
                   2218: 		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
                   2219: 	    }
                   2220: 	}
1.358     foxr     2221: 
1.206     sakharuk 2222:         #boundaries for contents columns
                   2223: 	my @min_len=();#columns can not be narrower 
                   2224: 	my @max_len=();#maximum length of column
1.357     foxr     2225: 	my $avg_max;
                   2226: 	my $avg_min;
                   2227: 	my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
                   2228: 	for (my $jn=0;$jn<=$counter_cols; $jn++) {
1.206     sakharuk 2229: 		my ($localmin,$localmax)=(0,0);
                   2230: 		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2231: 		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
                   2232: 			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
                   2233: 		    }
                   2234: 		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
                   2235: 			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
                   2236: 		    }
                   2237: 		}
                   2238: 		push @min_len, $localmin;
                   2239: 		push @max_len, $localmax;
1.357     foxr     2240: 		$avg_max = $localmax + $avg_max;
                   2241: 		$avg_min = $localmin + $avg_min;
                   2242: 	}
                   2243: 	# Does not really matter what the average max/min are if there are no cols.
                   2244: 	# and this prevents div 0 in that case.
                   2245: 
                   2246: 	if ($counter_cols != 0) {
                   2247: 	    $avg_max = $avg_max/$counter_cols;
                   2248: 	    $avg_min = $avg_min/$counter_cols;
                   2249: 	}
                   2250: 
                   2251: 
                   2252: 	#  I don't think the below is needed.. but just in case:
                   2253: 
                   2254: 	if ($avg_min > $avg_max) {
                   2255: 	    my $temp = $avg_min;
                   2256: 	    $avg_min = $avg_max;
                   2257: 	    $avg_max = $temp;
1.122     albertel 2258: 	}
1.357     foxr     2259: 
                   2260: 
                   2261: 	for (my $jn=0;$jn<=$counter_cols;$jn++) {
1.206     sakharuk 2262: 	    my $localmin=0,;
                   2263: 	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2264: 		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
                   2265: 		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
                   2266: 		}
                   2267: 	    }
1.229     sakharuk 2268: 	    if ($max_len[$jn]<$localmin) {
                   2269: 		$max_len[$jn]=$localmin;
                   2270: 	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2271: 	    }#object size is bigger
                   2272: 	    if ($min_len[$jn]<$localmin) {
                   2273: 		$min_len[$jn]=$localmin;
                   2274: 		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
                   2275: 	    }#object size is bigger
1.206     sakharuk 2276: 	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
                   2277: 		$min_len[$jn]=0;
                   2278: 		$max_len[$jn]=0;
                   2279: 	    }
1.357     foxr     2280: 	    #  Spans seem to be really bothered by max/min = 0.  So if we have one
                   2281: 	    #  make it an average joe max/min.
                   2282: 	    
                   2283: 	    if ($max_len[$jn] == 0) {
                   2284: 		$max_len[$jn] = $avg_max;
                   2285: 	    }
                   2286: 	    if ($min_len[$jn] == 0) {
                   2287: 		$min_len[$jn] = $avg_min;
                   2288: 	    }
                   2289: 
1.206     sakharuk 2290: 	}
                   2291:        #final adjustment of column width
                   2292: 	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
                   2293: 	my @adjust=();
                   2294:         #step 1. adjustment by maximum value
1.370     albertel 2295: 	my $space_needed=0;
1.206     sakharuk 2296: 	for (my $jn=0;$jn<=$#max_len;$jn++) {
1.370     albertel 2297: 	    $space_needed=$space_needed+$max_len[$jn];
1.206     sakharuk 2298: 	}
1.370     albertel 2299: 	if ($space_needed<=$available_space) {
1.362     foxr     2300: 
1.206     sakharuk 2301: 	    for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2302: 		if ($fwidth[$jn]==0) {
                   2303: 		    $fwidth[$jn]=$max_len[$jn];
1.53      sakharuk 2304: 		}
1.51      sakharuk 2305: 	    }
1.206     sakharuk 2306: 	} else {
                   2307:         #step 2. adjustment by minimum value (estimation)
1.370     albertel 2308: 	    $space_needed=0;
1.206     sakharuk 2309: 	    for (my $jn=0;$jn<=$#min_len;$jn++) {
1.370     albertel 2310: 		$space_needed+=$min_len[$jn];
1.206     sakharuk 2311: 	    }
1.370     albertel 2312: 	    if ($space_needed>$available_space) {
1.206     sakharuk 2313: 		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
                   2314: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2315: 		    if ($fwidth[$jn]==0) {
                   2316: 			$fwidth[$jn]=$min_len[$jn];
                   2317: 		    }
                   2318: 		}
1.229     sakharuk 2319: 		#check if we have objects which can be scaled
                   2320: 		my $how_many_to_scale=0;
                   2321: 		my @to_scale=();
                   2322: 		for (my $jn=0;$jn<=$#max_len;$jn++) {
                   2323: 		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
                   2324: 			$how_many_to_scale++;
                   2325: 			push @to_scale, $jn;
                   2326: 		    }
                   2327: 		}
                   2328: 		if ($how_many_to_scale>0) {
1.370     albertel 2329: 		    my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
1.229     sakharuk 2330: 		    foreach my $jn (@to_scale) {
                   2331: 			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2332: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
                   2333: 			    if ($1 ne '') {
                   2334: 				my $current_length=&recalc($1);
                   2335: 				$current_length=~/(\d+\.?\d*)/;
                   2336: 				$current_length=$current_length-$space_to_adjust;
                   2337: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
                   2338: 			    }
                   2339: 			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
                   2340: 			    if ($1 ne '') {
                   2341: 				my $current_length=$1;
                   2342: 				$current_length=$current_length-$space_to_adjust;
                   2343: 				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
                   2344: 			    }				
                   2345: 			}
                   2346: 			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
                   2347: 		    }
                   2348: 		}
1.206     sakharuk 2349: 	    } else {
                   2350: 	      #step 3. adjustment over minimal + corrections
1.370     albertel 2351: 		my $enlarge_coef=$available_space/$space_needed;
1.206     sakharuk 2352: 		my $acsessive=0;
                   2353: 		for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2354: 		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
                   2355: 		    if ($adjust[$jn]>$max_len[$jn]) {
                   2356: 			$fwidth[$jn]=$max_len[$jn];
                   2357: 			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
                   2358: 			$adjust[$jn]=0;
1.357     foxr     2359: 
1.206     sakharuk 2360: 		    }
                   2361: 		}
                   2362: 		if ($acsessive>0) {
                   2363: 		#we have an excess of space and can redistribute it
                   2364: 		    my $notempty_columns=0;
                   2365: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2366: 			if ($adjust[$jn]!=0) {
                   2367: 			    $notempty_columns++;
                   2368: 			}
                   2369: 		    }
                   2370: 		    my $per_column=$acsessive/$notempty_columns;
                   2371: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2372: 			if ($adjust[$jn]!=0) {
                   2373: 			    $adjust[$jn]+=$per_column;
                   2374: 			    $fwidth[$jn]=$adjust[$jn];
                   2375: 			}
1.223     sakharuk 2376: 		    }
                   2377: 		} else {
                   2378: 		    for (my $jn=0;$jn<=$#min_len;$jn++) {
                   2379: 			$fwidth[$jn]=$adjust[$jn];
1.206     sakharuk 2380: 		    }
                   2381: 		}
1.203     sakharuk 2382: 	    }
                   2383: 	}
1.364     foxr     2384:         # use all available width or specified width as if not specified,
                   2385: 	# the specified width gets defaulted to the available width.
                   2386: 
                   2387: 	my $current=0; 
                   2388: 	for (my $i=0;$i<=$#fwidth;$i++) {  
                   2389: 	    $current+=$fwidth[$i];
                   2390: 	}
1.371     albertel 2391: 	if ($current == 0) {
                   2392:             $current = $Apache::londefdef::table[-1]{'width'};
                   2393:         }
1.364     foxr     2394: 	my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
                   2395: 	for (my $i=0;$i<=$#fwidth;$i++) {  
                   2396: 	    $fwidth[$i]*=$coef;
1.206     sakharuk 2397: 	}
                   2398:         #removing of empty columns if allowed
1.208     sakharuk 2399:         my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1.206     sakharuk 2400: 	if ($permission eq 'yes') {
                   2401: 	    my @cleaned_table=();
                   2402:             my @cleaned_header=();
                   2403: 	    my $colind=0;
                   2404: 	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
                   2405: 		if ($fwidth[$jn]!=0) {
                   2406: 		    #we need to copy column
                   2407: 		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
                   2408: 			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
                   2409: 			$cleaned_header[$colind]=$fwidth[$jn];
                   2410: 		    }
                   2411: 		    $colind++;
                   2412: 		}
1.122     albertel 2413: 	    }
1.206     sakharuk 2414: 	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
                   2415: 	    @fwidth=@cleaned_header;
1.122     albertel 2416: 	}
1.359     foxr     2417: 
1.358     foxr     2418: 
1.206     sakharuk 2419: 	#construct header of the table
                   2420: 	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
                   2421: 	for (my $in=0;$in<=$#fwidth;$in++) {
                   2422: 	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
                   2423: 	}
                   2424: 	$header_of_table .= '}';
1.357     foxr     2425: 
1.126     sakharuk 2426: 	#fill the table
                   2427: 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1.306     foxr     2428: 	    my $have_rowspan = 0;
1.206     sakharuk 2429: 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
1.320     foxr     2430: 
                   2431: 		#-----------------------------------------------------------
                   2432:                 #   I think this order of doing things will ensure that
                   2433: 		#   single rowspan, columspan and combined row/colspans will
                   2434:                 #   work correctly.  LaTeX is delicate here.
                   2435: 		#    RF.
1.356     foxr     2436: 		
1.320     foxr     2437: 		# Start a rowspan if necessary:
1.356     foxr     2438: 		
                   2439: 		my $primary_col_width = $fwidth[$jn]; # Width of primary column.
1.320     foxr     2440: 		my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
                   2441: 		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
1.304     foxr     2442: 		#
                   2443: 		#  Do the appropriate magic if this has a colspan
                   2444: 		# 
1.356     foxr     2445: 		
1.372     foxr     2446: 		my $border_char = "";
                   2447: 		if ($border) {
                   2448: 		    $border_char = "|";
                   2449: 		}
1.356     foxr     2450: 		my $spanwidth = 0;
1.304     foxr     2451: 		if ($colspan > 1) {
1.336     foxr     2452: 		    for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
                   2453: 			$spanwidth += $fwidth[$spancol];
                   2454: 		    }
1.304     foxr     2455: 		    $output .= '\multicolumn{'.
                   2456: 			$colspan
1.337     foxr     2457: 			."}";
                   2458: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2459: 			$output .= '{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2460: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2461: 			$output .= '{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2462: 		    }
                   2463: 		    else {
1.372     foxr     2464: 			$output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
1.337     foxr     2465: 		    }
1.356     foxr     2466: 		    
                   2467: 		} else {
                   2468: 		    $spanwidth = $primary_col_width; # If no span width will be just colwidth
1.304     foxr     2469: 		}
1.306     foxr     2470: 
1.337     foxr     2471: 		# Rowspan... if colspan is 1, and there's an alignment we'll need
                   2472: 		# to kick in a multicolumn in order to get the alignment spec.
                   2473: 		# this must precede the multirow or LaTex gets quite upset.
                   2474: 		# Naturally if colspan > 1 we've already done that above ^
                   2475: 		#
                   2476: 		my $multirow_aligned = 0;
1.306     foxr     2477: 		if ($rowspan > 1) {
1.337     foxr     2478: 		    if ($colspan == 1) {
                   2479: 			if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2480: 			    $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2481: 			    $multirow_aligned = 1;
                   2482: 			} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2483: 			    $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2484: 			    $multirow_aligned = 1;
                   2485: 			}
                   2486: 		    }
1.306     foxr     2487: 		    $have_rowspan++;
1.356     foxr     2488: 		    if ($multirow_aligned) {
                   2489: 			$output .= '\multirow{'.$rowspan.'}[0]{*}{';
                   2490: 		    } else {
                   2491: 			$output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
                   2492: 		    }
1.350     albertel 2493: 		    
                   2494: 		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
                   2495: 			s{^\s*\\par\s*}{};
                   2496: 		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
                   2497: 			s{\s*\\vskip\s*0pt\s*$}{};
1.356     foxr     2498: 			  
1.337     foxr     2499: 		    #
                   2500: 		    # If we did not throw in a multicolumn to align, then add 
                   2501: 		    # an extra {
                   2502: 		    # so we close correctly without having to keep additional state
                   2503: 		    # around
                   2504: 		    #
                   2505: 		    if (!$multirow_aligned) {
                   2506: 			$output .= '{';
                   2507: 		    }
1.306     foxr     2508: 		}
                   2509: 		if (($rowspan eq '^') || ($rowspan eq '_')) {
                   2510: 		    $have_rowspan++;
                   2511: 		}
1.356     foxr     2512: 		    #--------------------------------------------------------------
1.306     foxr     2513: 
1.337     foxr     2514: 
                   2515: 		# For right and center alignment of single cells.
                   2516: 		# we are going to use a multicolumn with a span of 1 to specify alignment.
                   2517: 		#
                   2518: 		if ($colspan == 1  && $rowspan == 1) {
                   2519: 		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
1.372     foxr     2520: 			$output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
1.337     foxr     2521: 		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
1.372     foxr     2522: 			$output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
1.337     foxr     2523: 		    }
1.206     sakharuk 2524: 		}
1.337     foxr     2525: 
1.206     sakharuk 2526: 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
1.337     foxr     2527: 
                   2528: 		if (($colspan == 1 && $rowspan == 1)   &&
                   2529: 		    (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
                   2530: 		     ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
                   2531: 		    $output .= '}';
1.206     sakharuk 2532: 		}
1.337     foxr     2533: 
1.306     foxr     2534: 		# Close off any open multirow:
                   2535: 		
                   2536: 		if ($rowspan > 1) {
1.337     foxr     2537: 		    $output .= '}}';
1.306     foxr     2538: 		}
1.304     foxr     2539: 		#  Close off the colspan...
                   2540: 		#
                   2541: 		if ($colspan > 1)  {
                   2542: 		    $output .= '}';
                   2543: 		    $jn += $colspan-1; # Adjust for number of rows really left.
                   2544: 		}
1.206     sakharuk 2545:                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
                   2546: 	    }
1.306     foxr     2547: 	    #  If have_rowspan > 0, and borders are on, then 
                   2548: 	    #  we need to do more than put an \hline at the bottom of row.
                   2549: 	    #  we need to do the appropriate \cline to ensure that
                   2550: 	    #  the spanned rows don't have \hlines through them.
                   2551: 
                   2552: 	    if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
                   2553: 		$output .= ' \\\\ ';
                   2554: 		for (my $jn=0; $jn<=$#fwidth;$jn++) {
                   2555: 		    my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
1.320     foxr     2556: 		    if ($rowspan ne "^") {
                   2557: 			if (($rowspan <= 1) || ($rowspan eq '_')) {
                   2558: 			    my $column = $jn+1;
                   2559: 			    $output .= '\cline{'.$column.'-'.$column.'} ';
                   2560: 			}
1.306     foxr     2561: 		    }
                   2562: 		}
                   2563: 
                   2564: 	    } else {
                   2565: 		$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
                   2566: 	    }
1.122     albertel 2567: 	}
1.281     foxr     2568: 	# Note that \newline destroys alignment env's produced  by e.g. <div>
                   2569: 	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
                   2570: 	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
1.127     sakharuk 2571: 	if ($#Apache::londefdef::table > 0) {	    
                   2572: 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
1.294     foxr     2573: 	    # Figure out max/and min width  by summing us and then
                   2574: 	    # apply that to the current column of the table we nest in
                   2575: 	    # if it's larger than the current width or the current width
                   2576: 	    # is undefined.
                   2577: 	    #
                   2578: 	    my $min_nested_width = 0;
                   2579: 	    my $max_nested_width = 0;
                   2580: 	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
                   2581: 		$min_nested_width +=  $min_len[$col];
                   2582: 		$max_nested_width +=  $max_len[$col];
1.300     foxr     2583: 		
1.294     foxr     2584: 	    }
                   2585: 	    # Fudge in an extra 5 mm for borders etc:
                   2586: 	    
                   2587: 	    $min_nested_width += 5;
                   2588: 	    $max_nested_width += 5;
                   2589: 
                   2590: 	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
                   2591: 	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
                   2592: 	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
                   2593: 		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
                   2594: 	    }
                   2595: 	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
                   2596: 		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
                   2597: 	    }
                   2598: 
1.127     sakharuk 2599: 	    pop @Apache::londefdef::table;
1.129     sakharuk 2600: 	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
1.127     sakharuk 2601: 	} else {
                   2602: 	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
                   2603: 	    pop @Apache::londefdef::table;
1.143     sakharuk 2604: 	    undef @Apache::londefdef::table;
1.127     sakharuk 2605: 	}
1.396     foxr     2606: 	}
                   2607: 	&enable_para();
1.384     foxr     2608:     }
1.398     foxr     2609:     }
1.122     albertel 2610:     return $currentstring;
                   2611: }
                   2612: 
1.166     sakharuk 2613: #-- <tr> tag (end tag optional)
1.122     albertel 2614: sub start_tr {
                   2615:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2616:     my $currentstring = '';
1.325     albertel 2617:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2618: 	$currentstring = $token->[4];     
                   2619:     } elsif ($target eq 'tex') {
1.398     foxr     2620: 
                   2621: 	my $align = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 1);
                   2622: 	$Apache::londefdef::table[-1]->start_row();
                   2623: 	
                   2624: 	if ($align ne '') {
                   2625: 	    $Apache::londefdef::table[-1]->configure_row({default_halign => $align});
                   2626: 	}
                   2627: 
                   2628: 	#---------------------------------------------------------------
                   2629: 	# Old table code.
                   2630: 	#---------------------------------------------------------------
                   2631: 
                   2632: 	if (0) {
1.122     albertel 2633: 	$Apache::londefdef::table[-1]{'row_number'}++;
1.206     sakharuk 2634: 	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1.122     albertel 2635: 	if ($alignchar ne '') {
1.206     sakharuk 2636: 	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
1.122     albertel 2637: 	} else {
                   2638: 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
                   2639: 	}
                   2640: 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
1.300     foxr     2641: 	#
                   2642: 	#  Need to save the number of table columns to preserve the max # columns.
                   2643: 	#
                   2644: 	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
1.122     albertel 2645: 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
1.206     sakharuk 2646: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
                   2647: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
                   2648: 	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
                   2649: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
                   2650: 	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
1.398     foxr     2651:     }
1.122     albertel 2652:     } 
                   2653:     return $currentstring;
                   2654: }
                   2655:         
                   2656: sub end_tr {
1.160     sakharuk 2657:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     2658:     my $currentstring = &end_p();	# Close any pending <p> in the row.
1.325     albertel 2659:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     2660: 	$currentstring .= $token->[2];     
1.122     albertel 2661:     } elsif ($target eq 'tex') {
1.398     foxr     2662: 
                   2663: 	# In case the user is missing a </td> or </th> tag:
                   2664: 
                   2665: 	if ($Apache::londefdef::TD_redirection) {
                   2666: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2667: 	}
                   2668: 	$Apache::londefdef::table[-1]->end_row();
                   2669: 
                   2670: 	#-----------------------------------------------
                   2671: 	# Old table code
                   2672: 	#-----------------------------------------------
                   2673: 
                   2674: 	if (0) {
1.160     sakharuk 2675: 	if ($Apache::londefdef::TD_redirection) {
                   2676: 	    &end_td_tex($parstack,$parser,$safeeval);    
                   2677: 	}
1.300     foxr     2678: 	# Counter columns must be the maximum number of columns seen
                   2679: 	# in the table so far so:
                   2680: 	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
                   2681: 	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
                   2682: 	}
1.398     foxr     2683:     }
1.295     foxr     2684: 
1.294     foxr     2685: 	
1.122     albertel 2686:     }
                   2687:     return $currentstring;
                   2688: }
                   2689: 
1.166     sakharuk 2690: #-- <td> tag (end tag optional)
1.122     albertel 2691: sub start_td {
                   2692:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2693:     my $currentstring = '';
1.325     albertel 2694:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2695: 	$currentstring = $token->[4];     
                   2696:     } elsif ($target eq 'tex') {
1.160     sakharuk 2697: 	$Apache::londefdef::TD_redirection = 1;
1.159     sakharuk 2698: 	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2699:     } 
                   2700:     return $currentstring;
                   2701: }   
1.159     sakharuk 2702:     
                   2703: sub tag_check {
                   2704:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
1.160     sakharuk 2705:     my @ar=@$parstack; 
                   2706:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2707: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2708: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2709: 	    last;
                   2710: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2711: 	    splice @ar, $i+1;
                   2712: 	    &end_td_tex(\@ar,$parser,$safeeval);
                   2713: 	    &start_td_tex($parstack,$parser,$safeeval);
                   2714: 	    last;
1.159     sakharuk 2715: 	}
1.160     sakharuk 2716:     }
1.159     sakharuk 2717:     return '';
                   2718: }
1.398     foxr     2719: 
                   2720: #
                   2721: #  Factor out cell configuration hash generation:
                   2722: #
                   2723: 
                   2724: sub cell_config_hash {
                   2725:     my ($align, $rowspan, $colspan) = @_;
                   2726:     my %config;
                   2727:     if ($align ne '') {
                   2728: 	$config{'halign'} = $align;
                   2729:     }
                   2730:     if ($colspan ne "") {
                   2731: 	$config{'colspan'} = $colspan;
                   2732:     }
                   2733:     if ($rowspan ne '') {
                   2734: 	$config{'rowspan'} = $rowspan;
                   2735:     }
                   2736:     return \%config;
                   2737: }
1.159     sakharuk 2738:  
                   2739: sub start_td_tex {
                   2740:     my ($parstack,$parser,$safeeval) = @_;
1.398     foxr     2741: 
                   2742:     # At this stage, an empty cell is created with the
                   2743:     # appropriate rowspan/colspan and alignment
                   2744:     # attributes, but empty of text.  end_td_tex will
                   2745:     # fetch the contents from the recursive parse and
                   2746:     # fill the cell with them:
                   2747:     my $align   = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 1);
                   2748:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 1);
                   2749:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 1);
                   2750: 
                   2751:     my $config = &cell_config_hash($align, $rowspan, $colspan);
                   2752: 
                   2753:     my $table = $Apache::londefdef::table[-1];
                   2754:     $table->add_cell('', $config);
                   2755:     
                   2756: 
                   2757:     #------------------------------------------------
                   2758:     #  Old table code.
                   2759:     #------------------------------------------------
                   2760: 
                   2761:     if (0) {
                   2762: 
1.206     sakharuk 2763:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   2764:     if ($alignchar eq '') {
                   2765: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
1.159     sakharuk 2766:     }
1.206     sakharuk 2767:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
1.159     sakharuk 2768:     $Apache::londefdef::table[-1]{'counter_columns'}++;
1.206     sakharuk 2769:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2770:     if (defined $TeXwidth) {		
                   2771: 	my $current_length=&recalc($TeXwidth);
                   2772: 	$current_length=~/(\d+\.?\d*)/;
                   2773: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   2774:     }
1.398     foxr     2775:     }
1.159     sakharuk 2776:     &Apache::lonxml::startredirection();
                   2777:     return '';
                   2778: }
                   2779: 
                   2780: sub end_td_tex {
1.398     foxr     2781: 
                   2782:     my $text = &Apache::lonxml::endredirection();
                   2783:     my $table = $Apache::londefdef::table[-1];
                   2784:     $table->append_cell_text($text);
                   2785: 
                   2786:     #-------------------------------------------------
                   2787:     # Old table code
                   2788:     #-------------------------------------------------
                   2789: 
                   2790:     if (0) {
1.159     sakharuk 2791:     my ($parstack,$parser,$safeeval) = @_;
1.304     foxr     2792:     my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
                   2793:     my $current_column = $Apache::londefdef::table[-1]{'counter_columns'}; 
1.303     foxr     2794:     my $data = &Apache::lonxml::endredirection();
                   2795: 
1.305     foxr     2796:     #  The rowspan array of the table indicates which cells are part of a span.
                   2797:     #  n indicates the start of a span set of n rows.
                   2798:     #  ^ indicates a cell that continues a span set.
1.306     foxr     2799:     #  _ indicates the cell is at the bottom of a span set.
1.305     foxr     2800:     #  If this and subsequent cells are part of a rowspan, we must
                   2801:     #  push along the row until we find one that is not.
                   2802: 
                   2803:     while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column]) 
1.306     foxr     2804: 	   && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
1.305     foxr     2805: 	# Part of a span.
                   2806: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
                   2807: 	$current_column++;
                   2808:     }
                   2809:     $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
                   2810:    
                   2811: 
1.320     foxr     2812:     # Get the column and row spans.
                   2813:     # Colspan can be done via \multicolumn if I can figure out the data structs.
                   2814: 
                   2815:     my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
                   2816:     if (!$colspan) {
                   2817: 	$colspan = 1;
                   2818:     }
1.305     foxr     2819: 
                   2820:     my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
                   2821:     if (!$rowspan) {
                   2822: 	$rowspan = 1;
                   2823:     }
                   2824: 
1.303     foxr     2825: 
1.305     foxr     2826: 
1.320     foxr     2827:     for (my $c = 0; $c < $colspan; $c++) {
                   2828: 	$Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
                   2829: 	for (my $i = 1; $i < $rowspan; $i++) {
                   2830: 	    $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
                   2831: 	    if ($i == ($rowspan-1)) {
                   2832: 		$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
                   2833: 	    }
1.306     foxr     2834: 	}
1.305     foxr     2835:     }
1.304     foxr     2836: 
1.159     sakharuk 2837:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   2838:     if (defined $TeXwidth) {		
1.357     foxr     2839: 	for (my $c = 0; $c < $colspan; $c++) {
                   2840: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2841: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2842: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2843: 	}
1.159     sakharuk 2844:     } else {
1.206     sakharuk 2845: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   2846: 	    my $garbage_data=$data;
                   2847: 	    my $fwidth=0;
                   2848:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2849: 		my $current_length=&recalc($1);
                   2850: 		$current_length=~/(\d+\.?\d*)/;
                   2851: 		if ($fwidth<$1) {$fwidth=$1;}
                   2852: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2853: 	    }
                   2854:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   2855: 		my $current_length=$1;
                   2856: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   2857: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   2858: 	    }
1.357     foxr     2859: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2860: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2861: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2862: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2863: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2864: 	    }
1.231     sakharuk 2865: 	} 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)*/) {
                   2866: 	    my $garbage_data=$data;
                   2867: 	    my $fwidth=0;
                   2868:             while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
                   2869: 		my $current_length=&recalc($1);
                   2870: 		$current_length=~/(\d+\.?\d*)/;
                   2871: 		if ($fwidth<$1) {$fwidth=$1;}
                   2872: 		$garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2873: 	    }
                   2874:             while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   2875: 		my $current_length=&recalc($1);
                   2876: 		$current_length=~/(\d+\.?\d*)/;
                   2877: 		if ($fwidth<$1) {$fwidth=$1;}
                   2878: 		$garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   2879: 	    }
1.357     foxr     2880: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2881: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2882: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   2883: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2884: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2885: 	    }
1.231     sakharuk 2886: 	    $data=~s/\\\\\s*$//; 
1.159     sakharuk 2887: 	} else {  
1.166     sakharuk 2888: 	    $data=~s/^\s+(\S.*)/$1/; 
1.159     sakharuk 2889: 	    $data=~s/(.*\S)\s+$/$1/;
1.166     sakharuk 2890: 	    $data=~s/(\s)+/$1/;
1.206     sakharuk 2891: 	    my ($current_length,$min_length)=(0,0);
1.166     sakharuk 2892: 	    if ($data=~/\\vskip/) {
                   2893:                 my $newdata=$data;
                   2894: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   2895: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   2896: 		foreach my $elementdata (@newdata) {
1.206     sakharuk 2897: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
1.166     sakharuk 2898: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
1.206     sakharuk 2899:                     my @words=split(/ /,$elementdata);
                   2900: 		    foreach my $word (@words) {
                   2901: 			my $lengthword=2.5*&LATEX_length($word);
                   2902: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2903: 		    }
1.166     sakharuk 2904: 		}
                   2905: 	    } else {
1.206     sakharuk 2906: 		$current_length=2.5*&LATEX_length($data);
                   2907:                     my @words=split(/ /,$data);
                   2908: 		    foreach my $word (@words) {
1.228     sakharuk 2909: 			my $lengthword=2*&LATEX_length($word);
1.206     sakharuk 2910: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   2911: 		    }
1.166     sakharuk 2912: 	    }
1.357     foxr     2913: 	    for (my $c = 0; $c < $colspan; $c++) {
                   2914: 		push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2915: 		push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   2916: 		push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   2917: 		push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   2918: 	    }
1.159     sakharuk 2919: 	}        
                   2920:     }
1.302     foxr     2921:     # Substitute all of the tables nested in this cell in their appropriate places.
                   2922: 
                   2923: 
                   2924:     my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
                   2925:     for (my $in=0; $in<=$nested_count; $in++) {    
1.301     foxr     2926: 	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
                   2927: 	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
                   2928: 	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   2929: 	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
                   2930: 
                   2931:     }
                   2932:     # Should be be killing off the 'include' elements as they're used up?
1.305     foxr     2933: 
1.206     sakharuk 2934:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.305     foxr     2935: 
1.304     foxr     2936: 
                   2937: 
                   2938: 
                   2939:     #  the colspan array will indicate how many columns will be spanned by this
                   2940:     #  cell..this requires that counter_columns also be adjusted accordingly
                   2941:     #  so that the next bunch of text goes in the right cell.  Note that since
                   2942:     #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
                   2943:     #
                   2944: 
                   2945:     $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
                   2946:     for (my $i = 0; $i < ($colspan -1); $i++) {
                   2947: 	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
                   2948:     }
1.320     foxr     2949:     for (my $r = 0; $r < $rowspan; $r++) {
                   2950: 	$Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
                   2951: 	# Put empty text in spanned cols.
                   2952: 	
                   2953:     }
                   2954: 
1.398     foxr     2955:     }
1.304     foxr     2956: 
1.301     foxr     2957:     return '';
1.159     sakharuk 2958: }
                   2959: 
1.122     albertel 2960: sub end_td {
1.126     sakharuk 2961:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 2962:     my $currentstring = '';
1.325     albertel 2963:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2964: 	$currentstring = $token->[2];     
                   2965:     } elsif ($target eq 'tex') {
1.160     sakharuk 2966:         $Apache::londefdef::TD_redirection =0;
1.159     sakharuk 2967: 	&end_td_tex($parstack,$parser,$safeeval);
1.122     albertel 2968:     }
                   2969:     return $currentstring;
                   2970: }
                   2971: 
1.166     sakharuk 2972: #-- <th> tag (end tag optional)
1.122     albertel 2973: sub start_th {
                   2974:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2975:     my $currentstring = '';
1.325     albertel 2976:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 2977: 	$currentstring = $token->[4];     
                   2978:     } elsif ($target eq 'tex') {
1.230     sakharuk 2979: 	$Apache::londefdef::TD_redirection = 1;
                   2980: 	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
1.122     albertel 2981:     } 
                   2982:     return $currentstring;
1.130     sakharuk 2983: }   
1.230     sakharuk 2984:     
                   2985: sub tagg_check {
                   2986:     my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
                   2987:     my @ar=@$parstack; 
                   2988:     for (my $i=$#ar-1;$i>=0;$i--) {
                   2989: 	if (lc($$tagstack[$i]) eq $good_tag) {
                   2990: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2991: 	    last;
                   2992: 	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
                   2993: 	    splice @ar, $i+1;
                   2994: 	    &end_th_tex(\@ar,$parser,$safeeval);
                   2995: 	    &start_th_tex($parstack,$parser,$safeeval);
                   2996: 	    last;
                   2997: 	}
                   2998:     }
                   2999:     return '';
                   3000: }
                   3001:  
                   3002: sub start_th_tex {
                   3003:     my ($parstack,$parser,$safeeval) = @_;
1.398     foxr     3004: 
                   3005:     my $alignment = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef,1);
                   3006:     my $rowspan  =  &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 1);
                   3007:     my $colspan  =  &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 1);
                   3008: 
                   3009:     my $config   = cell_config_hash($alignment, $rowspan, $colspan);
                   3010:     my $table    = $Apache::londefdef::table[-1];
                   3011:     $table->add_cell('\textbf{', $config);
                   3012: 
                   3013:     #-------------------------------------------------------------------------------------
                   3014:     #
                   3015:     #  Old table code.
                   3016:     #
                   3017:     #--------------------------------------------------------------------------------------
                   3018: 
                   3019:     if (0) {
                   3020: 
                   3021: 
1.230     sakharuk 3022:     my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
                   3023:     if ($alignchar eq '') {
                   3024: 	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
                   3025:     }
                   3026:     push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
                   3027:     $Apache::londefdef::table[-1]{'counter_columns'}++;
                   3028:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   3029:     if (defined $TeXwidth) {		
                   3030: 	my $current_length=&recalc($TeXwidth);
                   3031: 	$current_length=~/(\d+\.?\d*)/;
                   3032: 	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
                   3033:     }
1.398     foxr     3034:     }
                   3035: 
                   3036:     # Accept xml until the </th> tag.
                   3037: 
1.230     sakharuk 3038:     &Apache::lonxml::startredirection();
                   3039:     return '';
                   3040: }
                   3041: 
                   3042: sub end_th_tex {
                   3043:     my ($parstack,$parser,$safeeval) = @_;
1.398     foxr     3044: 
                   3045:     my $table = $Apache::londefdef::table[-1];
                   3046:     my $text  = &Apache::lonxml::endredirection();
                   3047:     $table->append_cell_text($text.'}');
                   3048: 
                   3049:     #-----------------------------------------------------------------------------
                   3050:     #  Old table code:
                   3051:     #-----------------------------------------------------------------------------
                   3052: 
                   3053:     if (0) {
1.230     sakharuk 3054:     my $current_row = $Apache::londefdef::table[-1]{'row_number'};
                   3055:     my $data=&Apache::lonxml::endredirection();
                   3056:     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
                   3057:     if (defined $TeXwidth) {		
                   3058: 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3059: 	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3060: 	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3061:     } else {
                   3062: 	if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
                   3063: 	    my $garbage_data=$data;
                   3064: 	    my $fwidth=0;
                   3065:             while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
                   3066: 		my $current_length=&recalc($1);
                   3067: 		$current_length=~/(\d+\.?\d*)/;
                   3068: 		if ($fwidth<$1) {$fwidth=$1;}
                   3069: 		$garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
                   3070: 	    }
                   3071:             while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
                   3072: 		my $current_length=$1;
                   3073: 		if ($fwidth<$current_length) {$fwidth=$current_length;}
                   3074: 		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
                   3075: 	    }
                   3076: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3077: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
                   3078: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3079: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3080: 	} else {  
                   3081: 	    $data=~s/^\s+(\S.*)/$1/; 
                   3082: 	    $data=~s/(.*\S)\s+$/$1/;
                   3083: 	    $data=~s/(\s)+/$1/;
                   3084: 	    my ($current_length,$min_length)=(0,0);
                   3085: 	    if ($data=~/\\vskip/) {
                   3086:                 my $newdata=$data;
                   3087: 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
                   3088: 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
                   3089: 		foreach my $elementdata (@newdata) {
                   3090: 		    my $lengthnewdata=2.5*&LATEX_length($elementdata);
                   3091: 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                   3092:                     my @words=split(/ /,$elementdata);
                   3093: 		    foreach my $word (@words) {
                   3094: 			my $lengthword=2.5*&LATEX_length($word);
                   3095: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   3096: 		    }
                   3097: 		}
                   3098: 	    } else {
                   3099: 		$current_length=2.5*&LATEX_length($data);
                   3100:                     my @words=split(/ /,$data);
                   3101: 		    foreach my $word (@words) {
                   3102: 			my $lengthword=2*&LATEX_length($word);
                   3103: 			if ($min_length<$lengthword) {$min_length=$lengthword;}
                   3104: 		    }
                   3105: 	    }
                   3106: 	    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3107: 	    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
                   3108: 	    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
                   3109: 	    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
                   3110: 	}        
                   3111:     }
                   3112: 	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
                   3113: 	    $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
                   3114: 	}
                   3115:     #make data bold
                   3116:     $data='\textbf{'.$data.'}';
                   3117:     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
1.398     foxr     3118:     }
1.230     sakharuk 3119:     return'';
                   3120: }
                   3121: 
1.122     albertel 3122: sub end_th {
1.130     sakharuk 3123:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3124:     my $currentstring = &end_p();	# Close any open <p> in the row.
1.325     albertel 3125:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3126: 	$currentstring .= $token->[2];     
1.122     albertel 3127:     } elsif ($target eq 'tex') {
1.230     sakharuk 3128:         $Apache::londefdef::TD_redirection =0;
                   3129: 	&end_th_tex($parstack,$parser,$safeeval);
1.122     albertel 3130:     }
                   3131:     return $currentstring;
                   3132: }
1.230     sakharuk 3133:      
1.181     sakharuk 3134: #-- <img> tag (end tag forbidden)
1.249     foxr     3135: #
                   3136: #  Render the <IMG> tag.
                   3137: #     <IMG> has the following attributes (in addition to the 
                   3138: #     standard HTML ones:
                   3139: #      TeXwrap   - Governs how the tex target will try to wrap text around
                   3140: #                  horizontally aligned images.
                   3141: #      TeXwidth  - The width of the image when rendered for print (mm).
                   3142: #      TeXheight - The height of the image when rendered for print (mm)
                   3143: #         (Note there seems to also be support for this as a % of page size)
                   3144: #      
1.122     albertel 3145: sub start_img {
1.299     albertel 3146:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
1.122     albertel 3147:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
                   3148: 					 undef,1);
1.325     albertel 3149:     if (! $src && 
                   3150: 	($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
                   3151: 	) { 
1.299     albertel 3152: 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
1.189     albertel 3153: 	return '';
                   3154:     }
1.290     albertel 3155:     &Apache::lonxml::extlink($src);
1.122     albertel 3156:     my $currentstring = '';
                   3157:     my $scaling = .3;
1.249     foxr     3158: 
                   3159:    # Render unto browsers that which are the browser's...
                   3160: 
1.325     albertel 3161:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3162: 	if ($env{'browser.imagesuppress'} ne 'on') {
1.322     albertel 3163: 	    my $enc = ('yes' eq 
                   3164: 		       lc(&Apache::lonxml::get_param('encrypturl',$parstack,
                   3165: 						     $safeeval)));
                   3166: 	    $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
                   3167: 							 $enc);
1.122     albertel 3168: 	} else {
1.322     albertel 3169: 	    my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
                   3170: 						    undef,1);
                   3171: 	    if (!$alttag) {
                   3172: 		$alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3173: 						   $src);
1.51      sakharuk 3174: 	    }
1.158     sakharuk 3175: 	    $currentstring.='[IMAGE: '.$alttag.']';
1.1       sakharuk 3176: 	}
1.249     foxr     3177: 
                   3178: 	# and render unto TeX that which is LaTeX
                   3179: 
1.122     albertel 3180:     } elsif ($target eq 'tex') {
1.248     foxr     3181: 	#
                   3182: 	#  The alignment will require some superstructure to be put around
                   3183: 	#  the \includegraphics stuff.  At present we can only partially
                   3184: 	#  simulate the alignments offered by html.
                   3185: 	#
                   3186: 	#
                   3187: 	my $align = lc(&Apache::lonxml::get_param('align', 
                   3188: 						  $parstack,
                   3189: 						  $safeeval,
                   3190: 						  undef,1));
                   3191: 	if(!$align) {
1.287     foxr     3192: 		$align = "bottom";	# This is html's default so it's ours too.
1.248     foxr     3193: 	}
                   3194: 	#
                   3195: 	&Apache::lonxml::debug("Alignemnt = $align");
                   3196: 	#  LaTeX's image/text wrapping is really bad since it wants to
                   3197: 	#  make figures float.  
                   3198:         #   The user has the optional parameter (applicable only to l/r
                   3199: 	# alignment to use the picins/parpic directive to get wrapped text
                   3200: 	# this is also imperfect.. that's why we give them a choice...
                   3201: 	# so they can't yell at us for our choice.
                   3202: 	#
                   3203: 	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
                   3204: 							    $parstack,
                   3205: 							    $safeeval,
                   3206: 							    undef,0);
1.312     foxr     3207: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
1.248     foxr     3208: 	if(!$latex_rendering) {
1.312     foxr     3209: 		$latex_rendering = "texwrap";
                   3210: 	}
                   3211: 	# using texwrap inside a table does not work. So, if after all of this,
                   3212: 	# texwrap is on, we turn it off if we detect we're in a table:
                   3213: 	#
                   3214: 	if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
                   3215: 	    $latex_rendering = 'parpic';
1.248     foxr     3216: 	}
1.323     foxr     3217: 
1.312     foxr     3218: 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
1.248     foxr     3219: 
1.390     foxr     3220: 	#if original bmp/gif/jpg/png file exist do following:
1.266     albertel 3221: 	my $origsrc=$src;
1.256     albertel 3222: 	my ($path,$file) = &get_eps_image($src);
1.341     foxr     3223: 	# &Apache::lonnet::logthis("Image source: $src result: $path $file");
1.122     albertel 3224: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.261     foxr     3225: 	&Apache::lonxml::debug("path = $path file = $file src = $src");
1.192     sakharuk 3226: 	if (-e $src) {
1.261     foxr     3227: 	    &Apache::lonxml::debug("$src exists");
1.256     albertel 3228: 	    my ($height_param,$width_param)=
1.266     albertel 3229: 		&image_size($origsrc,0.3,$parstack,$safeeval);
                   3230: 	    my $size;
                   3231: 	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
                   3232: 	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
1.341     foxr     3233: 	    # Default size if not able to extract that (e.g. eps image).
                   3234: 	    
                   3235: 	    # &Apache::lonnet::logthis("Size = $size");
                   3236: 	    
1.266     albertel 3237: 	    $size='['.$size;
                   3238: 	    $size=~s/,$/]/; 
1.344     albertel 3239: 	    $currentstring .= '\graphicspath{{'.$path.'}}'
                   3240: 		.'\includegraphics'.$size.'{'.$file.'} ';
1.354     foxr     3241: 	    my $closure;
                   3242: 	    ($currentstring, $closure) = &align_latex_image($align, 
                   3243: 							    $latex_rendering, 
                   3244: 							    $currentstring, 
                   3245: 							    $width_param, 
                   3246: 							    $height_param);
                   3247: 	    $currentstring .= $closure;
1.353     foxr     3248: 						
1.122     albertel 3249: 	} else {
1.261     foxr     3250: 	    &Apache::lonxml::debug("$src does not exist");
1.122     albertel 3251: 	    #original image file doesn't exist so check the alt attribute
                   3252: 	    my $alt = 
                   3253: 		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
                   3254: 	    unless ($alt) {
                   3255: 		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
                   3256: 	    }
                   3257: 
1.256     albertel 3258: 	    if ($alt) { $currentstring .= ' '.$alt.' '; }
1.59      sakharuk 3259: 	}
1.249     foxr     3260: 
                   3261: 	# And here's where the semi-quote breaks down: allow the user
                   3262:         # to edit the beast as well by rendering the problem for edit:
1.186     albertel 3263:     } elsif ($target eq 'edit') {
1.368     banghart 3264:         my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
1.186     albertel 3265: 	$currentstring .=&Apache::edit::tag_start($target,$token);
                   3266: 	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
1.368     banghart 3267: 	    &Apache::edit::browse('src',undef,'alt',$only).' '.
1.186     albertel 3268: 	    &Apache::edit::search('src',undef,'alt').'<br />';
                   3269: 	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
                   3270: 	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
                   3271: 	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
                   3272: 	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
                   3273: 	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
1.234     albertel 3274: 	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
                   3275: 						   ['','bottom','middle','top','left','right'],$token,5);
1.249     foxr     3276: 	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
1.348     albertel 3277: 						   ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
1.332     www      3278: 	$currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
1.322     albertel 3279: 						   ['no','yes'], $token, 2);
1.186     albertel 3280: 	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.249     foxr     3281: 	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
                   3282: 	my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
                   3283: 	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
                   3284: 	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
                   3285: 
1.381     www      3286:         if ($token->[2]{'src'}=~/\$/) {
                   3287:            $currentstring.='Variable image source';
                   3288:         } else {
                   3289: 	   $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
                   3290: 	   if ($width) { $currentstring.=' width="'.$width.'" '; }
                   3291: 	   if ($height) { $currentstring.=' height="'.$height.'" '; }
                   3292: 	   $currentstring .= ' />';
                   3293:         }
1.186     albertel 3294:     } elsif ($target eq 'modified') {
1.210     albertel 3295: 	my ($osrc,$owidth,$oheight)=
                   3296: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   3297: 	my $ctag=&Apache::edit::get_new_args($token,$parstack,
1.234     albertel 3298: 					     $safeeval,'src','alt','align',
1.249     foxr     3299: 					     'TeXwidth','TeXheight', 'TeXwrap',
1.322     albertel 3300: 					     'width','height','encrypturl');
1.210     albertel 3301: 	my ($nsrc,$nwidth,$nheight)=
                   3302: 	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
                   3303: 	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
                   3304: 	&image_replication($loc);
                   3305: 	my ($iwidth,$iheight);
                   3306: 	if (-e $loc) {
                   3307: 	    my $image = Image::Magick->new;
                   3308: 	    $image->Read($loc);
                   3309: 	    ($iwidth, $iheight) = ($image->Get('width'),
                   3310: 				   $image->Get('height'));
                   3311: 	}
                   3312: 	if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
                   3313: 	    # changed image or no size specified,
                   3314:             # if they didn't explicitly change the 
                   3315:             # width or height use the ones from the image
                   3316: 	    if ($iwidth && $iheight) {
                   3317: 		if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
                   3318: 		    $token->[2]{'width'} = $iwidth;$ctag=1;
                   3319: 		}
                   3320: 		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
                   3321: 		    $token->[2]{'height'}=$iheight;$ctag=1;
1.186     albertel 3322: 		}
                   3323: 	    }
                   3324: 	}
1.210     albertel 3325: 	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
                   3326: 	# if we don't have a width or height
                   3327: 	if ($iwidth && $cwidth && !$cheight) {
                   3328: 	    $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
                   3329: 	}
                   3330: 	if ($iheight && $cheight && !$cwidth) {
                   3331: 	    $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
                   3332: 	}
                   3333: 	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
1.122     albertel 3334:     }
1.261     foxr     3335: 
1.122     albertel 3336:     return $currentstring;
                   3337: }
                   3338: 
                   3339: sub end_img {
                   3340:     my ($target,$token) = @_;
                   3341:     my $currentstring = '';
1.325     albertel 3342:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3343: 	$currentstring = $token->[2];
                   3344:     } elsif ($target eq 'tex') {
                   3345: 	$currentstring = '';
                   3346:     }
                   3347:     return $currentstring;
                   3348: }
                   3349: 
1.181     sakharuk 3350: #-- <applet> tag (end tag required)
1.122     albertel 3351: sub start_applet {
                   3352:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3353:     
                   3354:     my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
1.290     albertel 3355:     &Apache::lonxml::extlink($code);
1.122     albertel 3356:     my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
                   3357: 					   undef,1);
1.290     albertel 3358:     &Apache::lonxml::extlink($archive);
1.122     albertel 3359:     my $currentstring = '';
1.325     albertel 3360:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3361: 	if ($env{'browser.appletsuppress'} ne 'on') {
1.250     albertel 3362: 	    $currentstring = &Apache::lonenc::encrypt_ref($token,
                   3363: 							  {'code'=>$code,
                   3364: 							   'archive'=>$archive}
                   3365: 							  );
1.122     albertel 3366: 	} else {
                   3367: 	    my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3368: 						   $safeeval,undef,1);
                   3369: 	    unless ($alttag) {
                   3370: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3371: 						 $code);
1.44      sakharuk 3372: 	    }
1.122     albertel 3373: 	    $currentstring='[APPLET: '.$alttag.']';
1.1       sakharuk 3374: 	}
1.122     albertel 3375:     } elsif ($target eq 'tex') {
1.361     foxr     3376: 	# Turn off some stuff we can't be inside thank you LaTeX
                   3377: 	
                   3378: 
                   3379: 	my $restart_sub = 0;
                   3380: 	my $restart_sup = 0;
                   3381: 
                   3382: 	# Since <sub> and <sup> are simple tags it's ok to turn off/on
                   3383: 	# using the start_ stop_ functions.. those tags only care about
                   3384: 	# $target.
                   3385: 
                   3386: 	if (&is_inside_of($tagstack, "sub")) {
                   3387: 	    $restart_sub = 1;
                   3388: 	    $currentstring .= &end_sub($target, $token, $tagstack, 
                   3389: 				       $parstack, $parser, $safeeval);
                   3390: 	}
                   3391: 	if (&is_inside_of($tagstack, "sup")) {
                   3392: 	    $restart_sup = 1;
                   3393: 	    $currentstring .= &end_sup($target, $token, $tagstack,
                   3394: 				       $parstack, $parser, $safeeval);
                   3395: 	}
                   3396: 
                   3397: 	# Now process the applet; just replace it with its alt attribute.
                   3398: 
1.177     albertel 3399: 	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
                   3400: 					       $safeeval,undef,1);
                   3401: 	unless ($alttag) {
                   3402: 	    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
                   3403: 						undef,1);
                   3404: 	    $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
                   3405: 					     $code);
1.175     sakharuk 3406: 	}
1.177     albertel 3407: 	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
                   3408: 	    '.}\end{center}';
1.361     foxr     3409: 
                   3410: 	# Turn stuff back on that we can't be inside of.
                   3411: 
                   3412: 	if ($restart_sub) {
                   3413: 	    $currentstring .= &start_sub($target, $token, $tagstack,
                   3414: 					$parstack, $parser, $safeeval);
                   3415: 	}
                   3416: 	if ($restart_sup) {
                   3417: 	    $currentstring .= &start_sup($target, $token, $tagstack,
                   3418: 					 $parstack, $parser, $safeeval);
                   3419: 	}
1.122     albertel 3420:     } 
                   3421:     return $currentstring;
                   3422: }
                   3423: 
                   3424: sub end_applet {
                   3425:     my ($target,$token) = @_;
                   3426:     my $currentstring = '';
1.325     albertel 3427:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3428: 	$currentstring = $token->[2];
                   3429:     } elsif ($target eq 'tex') {
                   3430:     } 
                   3431:     return $currentstring;
                   3432: }
                   3433: 
1.181     sakharuk 3434: #-- <embed> tag (end tag optional/required)
1.122     albertel 3435: sub start_embed {    
                   3436:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3437:     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3438:     &Apache::lonxml::extlink($src);
1.122     albertel 3439:     my $currentstring = '';
1.325     albertel 3440:     if ($target eq 'web' || $target eq 'webgrade') {
1.267     albertel 3441: 	if ($env{'browser.embedsuppress'} ne 'on') {
1.250     albertel 3442: 	    $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
1.122     albertel 3443: 	} else {
                   3444: 	    my $alttag=&Apache::lonxml::get_param
                   3445: 		('alt',$parstack,$safeeval,undef,1);
                   3446: 	    unless ($alttag) {
                   3447: 		$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
1.42      albertel 3448: 	    }
1.122     albertel 3449: 	    $currentstring='[EMBED: '.$alttag.']';
1.10      www      3450: 	}
1.122     albertel 3451:     } elsif ($target eq 'tex') {
                   3452:     } 
                   3453:     return $currentstring;
                   3454: }
                   3455: 
                   3456: sub end_embed {
                   3457:     my ($target,$token) = @_;
                   3458:     my $currentstring = '';
1.325     albertel 3459:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3460: 	$currentstring = $token->[2];     
1.175     sakharuk 3461:     } elsif ($target eq 'tex') {  
1.122     albertel 3462:     } 
                   3463:     return $currentstring;
                   3464: }
                   3465: 
1.181     sakharuk 3466: #-- <param> tag (end tag forbidden)
1.122     albertel 3467: sub start_param {
                   3468:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.290     albertel 3469:     if (&Apache::lonxml::get_param('name',$parstack,
                   3470: 				   $safeeval,undef,1)=~/^cabbase$/i) {
                   3471: 	my $value=&Apache::lonxml::get_param('value',$parstack,
                   3472: 					     $safeeval,undef,1);
                   3473: 	&Apache::lonxml::extlink($value);
                   3474:     } 
                   3475:   
                   3476:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3477:     &Apache::lonxml::extlink($src);
1.122     albertel 3478:     my $currentstring = '';
1.325     albertel 3479:     if ($target eq 'web' || $target eq 'webgrade') {
1.250     albertel 3480: 	my %toconvert;
                   3481: 	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
                   3482: 	if ($src) { $toconvert{'src'}= $src; }
                   3483: 	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
                   3484: 					    undef,1);
1.251     albertel 3485: 	if ($name=~/^cabbase$/i) {
                   3486: 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
                   3487: 							   $safeeval,undef,1);
                   3488: 	}
1.250     albertel 3489: 	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
1.122     albertel 3490:     } elsif ($target eq 'tex') {
                   3491:     } 
                   3492:     return $currentstring;
                   3493: }
                   3494: 
                   3495: sub end_param {
                   3496:     my ($target,$token) = @_;
                   3497:     my $currentstring = '';
1.325     albertel 3498:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3499: 	$currentstring = $token->[2];     
                   3500:     } elsif ($target eq 'tex') {
                   3501:     } 
                   3502:     return $currentstring;
                   3503: }
                   3504: 
                   3505: #-- <allow> tag
                   3506: sub start_allow {
                   3507:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3508:     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
1.290     albertel 3509:     &Apache::lonxml::extlink($src);
                   3510: 
1.241     albertel 3511:     if ($target eq 'tex') { &image_replication($src); }
1.122     albertel 3512:     my $result;
                   3513:     if ($target eq 'edit') {
                   3514: 	$result .=&Apache::edit::tag_start($target,$token);
                   3515: 	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
                   3516: 	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
                   3517:     } elsif ($target eq 'modified') {
                   3518: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   3519: 						     $safeeval,'src');
                   3520: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   3521:     }
                   3522:     return $result;
                   3523: }
                   3524: 
                   3525: sub end_allow {
                   3526:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3527:     if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
                   3528:     return '';
                   3529: }
1.119     www      3530: 
1.181     sakharuk 3531: #-- Frames (end tag required)
                   3532: #-- <frameset>
1.122     albertel 3533: sub start_frameset {
                   3534:     my ($target,$token) = @_;
1.277     foxr     3535:     my $currentstring = '';	# Close any pending para.
1.325     albertel 3536:     if ($target eq 'web' || $target eq 'webgrade') { 
1.328     albertel 3537: 	$currentstring = 
                   3538: 	    &Apache::loncommon::start_page($Apache::londefdef::title,
                   3539: 					   $Apache::londefdef::head,
                   3540: 					   {'add_entries'    => $token->[2],
1.404     bisitz   3541: #					    'no_title'       => 1,
1.328     albertel 3542: 					    'force_register' => 1,
                   3543: 					    'frameset'       => 1,});
                   3544: 
1.122     albertel 3545:     }
                   3546:     return $currentstring;
                   3547: }
                   3548: 
                   3549: sub end_frameset {
                   3550:     my ($target,$token) = @_;
                   3551:     my $currentstring = '';
1.325     albertel 3552:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3553: 	$currentstring = $token->[2];
                   3554:     }
                   3555:     return $currentstring;
                   3556: }
1.162     sakharuk 3557: 
1.181     sakharuk 3558: #-- <xmp> (end tag required)
1.162     sakharuk 3559: sub start_xmp {
                   3560:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3561:     my $currentstring = '';
1.325     albertel 3562:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3563: 	$currentstring .= $token->[4];
                   3564:     } elsif ($target eq 'tex') {
                   3565: 	$currentstring .= '\begin{verbatim}';
                   3566:     } 
                   3567:     return $currentstring;
                   3568: }
                   3569: 
                   3570: sub end_xmp {
                   3571:     my ($target,$token) = @_;
                   3572:     my $currentstring = '';
1.325     albertel 3573:     if ($target eq 'web' || $target eq 'webgrade') {
1.162     sakharuk 3574: 	$currentstring .= $token->[2];
                   3575:     } elsif ($target eq 'tex') {
                   3576: 	$currentstring .= '\end{verbatim}';
                   3577:     }
                   3578:     return $currentstring;
                   3579: }
                   3580: 
1.181     sakharuk 3581: #-- <pre> (end tag required)
1.122     albertel 3582: sub start_pre {
1.126     sakharuk 3583:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3584:     my $currentstring = &end_p();	# close off pending <p>
1.325     albertel 3585:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3586: 	$currentstring .= $token->[4];
                   3587:     } elsif ($target eq 'tex') {
1.136     sakharuk 3588: 	$currentstring .= '\begin{verbatim}';
1.319     albertel 3589: 	&Apache::lonxml::disable_LaTeX_substitutions();
1.122     albertel 3590:     } 
                   3591:     return $currentstring;
                   3592: }
                   3593: 
                   3594: sub end_pre {
                   3595:     my ($target,$token) = @_;
                   3596:     my $currentstring = '';
1.325     albertel 3597:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3598: 	$currentstring .= $token->[2];
                   3599:     } elsif ($target eq 'tex') {
1.136     sakharuk 3600: 	$currentstring .= '\end{verbatim}';
1.319     albertel 3601: 	&Apache::lonxml::enable_LaTeX_substitutions();
1.122     albertel 3602:     }
                   3603:     return $currentstring;
                   3604: }
                   3605: 
                   3606: #-- <insert>
                   3607: sub start_insert {
                   3608:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3609:     my $currentstring = '';
1.325     albertel 3610:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3611: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3612: 	$currentstring .= '<b>'.$display.'</b>';;
                   3613:     }
                   3614:     return $currentstring;
                   3615: }
                   3616: 
                   3617: sub end_insert {
                   3618:     my ($target,$token) = @_;
                   3619:     my $currentstring = '';
1.325     albertel 3620:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3621: 	$currentstring .= '';
                   3622:     }
                   3623:     return $currentstring;
                   3624: }
                   3625: 
                   3626: #-- <externallink>
                   3627: sub start_externallink {
                   3628:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
                   3629:     my $currentstring = '';
1.325     albertel 3630:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3631: 	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
                   3632: 	$currentstring .= '<b>'.$display.'</b>';;
                   3633:     }
                   3634:     return $currentstring;
                   3635: }
                   3636: 
                   3637: sub end_externallink {
                   3638:     my ($target,$token) = @_;
                   3639:     my $currentstring = '';
1.325     albertel 3640:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3641: 	$currentstring .= '';
                   3642:     }
                   3643:     return $currentstring;
                   3644: }
                   3645: 
                   3646: #-- <blankspace heigth="">
                   3647: sub start_blankspace {
                   3648:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.279     foxr     3649:     my $currentstring = &end_p();	# closes off any unclosed <p>
1.122     albertel 3650:     if ($target eq 'tex') {
                   3651: 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
                   3652: 	$currentstring .= '\vskip '.$howmuch.' ';
                   3653:     }
                   3654:     return $currentstring;
                   3655: }
                   3656: 
                   3657: sub end_blankspace {
                   3658:     my ($target,$token) = @_;
                   3659:     my $currentstring = '';
                   3660:     if ($target eq 'tex') {
                   3661: 	$currentstring .= '';
                   3662:     }
                   3663:     return $currentstring;
                   3664: }
                   3665: 
1.181     sakharuk 3666: #-- <abbr> tag (end tag required)
1.122     albertel 3667: sub start_abbr {
                   3668:     my ($target,$token) = @_;
                   3669:     my $currentstring = '';
1.325     albertel 3670:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3671: 	$currentstring = $token->[4];     
                   3672:     } 
                   3673:     return $currentstring;
                   3674: }
                   3675: 
                   3676: sub end_abbr {
                   3677:     my ($target,$token) = @_;
                   3678:     my $currentstring = '';
1.325     albertel 3679:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3680: 	$currentstring = $token->[2];    
                   3681:     } 
                   3682:     return $currentstring;
                   3683: }
                   3684: 
1.181     sakharuk 3685: #-- <acronym> tag (end tag required)
1.122     albertel 3686: sub start_acronym {
                   3687:     my ($target,$token) = @_;
                   3688:     my $currentstring = '';
1.325     albertel 3689:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3690: 	$currentstring = $token->[4];     
                   3691:     } 
                   3692:     return $currentstring;
                   3693: }
                   3694: 
                   3695: sub end_acronym {
                   3696:     my ($target,$token) = @_;
                   3697:     my $currentstring = '';
1.325     albertel 3698:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3699: 	$currentstring = $token->[2];    
                   3700:     } 
                   3701:     return $currentstring;
                   3702: }
                   3703: 
1.181     sakharuk 3704: #-- <area> tag (end tag forbidden)
1.122     albertel 3705: sub start_area {
                   3706:     my ($target,$token) = @_;
                   3707:     my $currentstring = '';
1.325     albertel 3708:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3709: 	$currentstring = $token->[4];     
                   3710:     } 
                   3711:     return $currentstring;
                   3712: }
                   3713: 
                   3714: sub end_area {
                   3715:     my ($target,$token) = @_;
                   3716:     my $currentstring = '';
1.325     albertel 3717:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3718: 	$currentstring = $token->[2];    
                   3719:     } 
                   3720:     return $currentstring;
                   3721: }
                   3722: 
1.181     sakharuk 3723: #-- <base> tag (end tag forbidden)
1.122     albertel 3724: sub start_base {
                   3725:     my ($target,$token) = @_;
                   3726:     my $currentstring = '';
1.325     albertel 3727:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3728: 	$currentstring = $token->[4];     
1.161     sakharuk 3729:     }
1.122     albertel 3730:     return $currentstring;
                   3731: }
                   3732: 
                   3733: sub end_base {
                   3734:     my ($target,$token) = @_;
                   3735:     my $currentstring = '';
1.325     albertel 3736:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3737: 	$currentstring = $token->[2];    
                   3738:     } 
                   3739:     return $currentstring;
                   3740: }
                   3741: 
1.181     sakharuk 3742: #-- <bdo> tag (end tag required)
1.122     albertel 3743: sub start_bdo {
                   3744:     my ($target,$token) = @_;
                   3745:     my $currentstring = '';
1.325     albertel 3746:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3747: 	$currentstring = $token->[4];     
                   3748:     } 
                   3749:     return $currentstring;
                   3750: }
                   3751: 
                   3752: sub end_bdo {
                   3753:     my ($target,$token) = @_;
                   3754:     my $currentstring = '';
1.325     albertel 3755:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3756: 	$currentstring = $token->[2];    
                   3757:     } 
                   3758:     return $currentstring;
                   3759: }
                   3760: 
1.181     sakharuk 3761: #-- <bgsound> tag (end tag optional)
1.122     albertel 3762: sub start_bgsound {
                   3763:     my ($target,$token) = @_;
                   3764:     my $currentstring = '';
1.325     albertel 3765:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3766: 	$currentstring = $token->[4];     
                   3767:     } 
                   3768:     return $currentstring;
                   3769: }
                   3770: 
                   3771: sub end_bgsound {
                   3772:     my ($target,$token) = @_;
                   3773:     my $currentstring = '';
1.325     albertel 3774:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3775: 	$currentstring = $token->[2];    
                   3776:     } 
                   3777:     return $currentstring;
                   3778: }
                   3779: 
1.181     sakharuk 3780: #-- <blink> tag (end tag required)
1.122     albertel 3781: sub start_blink {
                   3782:     my ($target,$token) = @_;
                   3783:     my $currentstring = '';
1.325     albertel 3784:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3785: 	$currentstring = $token->[4];     
                   3786:     } 
                   3787:     return $currentstring;
                   3788: }
                   3789: 
                   3790: sub end_blink {
                   3791:     my ($target,$token) = @_;
                   3792:     my $currentstring = '';
1.325     albertel 3793:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3794: 	$currentstring = $token->[2];    
                   3795:     } 
                   3796:     return $currentstring;
                   3797: }
                   3798: 
1.181     sakharuk 3799: #-- <blockquote> tag (end tag required)
1.122     albertel 3800: sub start_blockquote {
                   3801:     my ($target,$token) = @_;
1.279     foxr     3802:     my $currentstring = &end_p();	# Close any unclosed <p>
1.325     albertel 3803:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     3804: 	$currentstring .= $token->[4];     
1.122     albertel 3805:     } 
1.339     foxr     3806:     if ($target eq 'tex') {
                   3807: 	$currentstring .= '\begin{quote}';
                   3808:     }
1.122     albertel 3809:     return $currentstring;
                   3810: }
                   3811: 
                   3812: sub end_blockquote {
                   3813:     my ($target,$token) = @_;
                   3814:     my $currentstring = '';
1.325     albertel 3815:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3816: 	$currentstring = $token->[2];    
                   3817:     } 
1.339     foxr     3818:     if ($target eq 'tex') {
                   3819: 	$currentstring = '\end{quote}';
                   3820:     }
1.122     albertel 3821:     return $currentstring;
                   3822: }
                   3823: 
1.181     sakharuk 3824: #-- <button> tag (end tag required)
1.122     albertel 3825: sub start_button {
                   3826:     my ($target,$token) = @_;
                   3827:     my $currentstring = '';
1.325     albertel 3828:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3829: 	$currentstring = $token->[4];     
                   3830:     } 
                   3831:     return $currentstring;
                   3832: }
                   3833: 
                   3834: sub end_button {
                   3835:     my ($target,$token) = @_;
                   3836:     my $currentstring = '';
1.325     albertel 3837:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3838: 	$currentstring = $token->[2];    
                   3839:     } 
                   3840:     return $currentstring;
                   3841: }
                   3842: 
1.181     sakharuk 3843: #-- <caption> tag (end tag required)
1.122     albertel 3844: sub start_caption {
                   3845:     my ($target,$token) = @_;
                   3846:     my $currentstring = '';
1.325     albertel 3847:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3848: 	$currentstring = $token->[4];     
                   3849:     } 
                   3850:     return $currentstring;
                   3851: }
                   3852: 
                   3853: sub end_caption {
                   3854:     my ($target,$token) = @_;
                   3855:     my $currentstring = '';
1.325     albertel 3856:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3857: 	$currentstring = $token->[2];    
                   3858:     } 
                   3859:     return $currentstring;
                   3860: }
                   3861: 
1.181     sakharuk 3862: #-- <col> tag (end tag forbdden)
1.122     albertel 3863: sub start_col {
                   3864:     my ($target,$token) = @_;
                   3865:     my $currentstring = '';
1.325     albertel 3866:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3867: 	$currentstring = $token->[4];     
                   3868:     } 
                   3869:     return $currentstring;
                   3870: }
                   3871: 
                   3872: sub end_col {
                   3873:     my ($target,$token) = @_;
                   3874:     my $currentstring = '';
1.325     albertel 3875:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3876: 	$currentstring = $token->[2];    
                   3877:     } 
                   3878:     return $currentstring;
                   3879: }
                   3880: 
1.181     sakharuk 3881: #-- <colgroup> tag (end tag optional)
1.122     albertel 3882: sub start_colgroup {
                   3883:     my ($target,$token) = @_;
                   3884:     my $currentstring = '';
1.325     albertel 3885:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3886: 	$currentstring = $token->[4];     
                   3887:     } 
                   3888:     return $currentstring;
                   3889: }
                   3890: 
                   3891: sub end_colgroup {
                   3892:     my ($target,$token) = @_;
                   3893:     my $currentstring = '';
1.325     albertel 3894:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3895: 	$currentstring = $token->[2];    
                   3896:     } 
                   3897:     return $currentstring;
                   3898: }
                   3899: 
1.181     sakharuk 3900: #-- <del> tag (end tag required)
1.122     albertel 3901: sub start_del {
                   3902:     my ($target,$token) = @_;
                   3903:     my $currentstring = '';
1.325     albertel 3904:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3905: 	$currentstring = $token->[4];     
                   3906:     } 
                   3907:     return $currentstring;
                   3908: }
                   3909: 
                   3910: sub end_del {
                   3911:     my ($target,$token) = @_;
                   3912:     my $currentstring = '';
1.325     albertel 3913:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3914: 	$currentstring = $token->[2];    
                   3915:     } 
                   3916:     return $currentstring;
                   3917: }
                   3918: 
1.181     sakharuk 3919: #-- <fieldset> tag (end tag required)
1.122     albertel 3920: sub start_fieldset {
                   3921:     my ($target,$token) = @_;
                   3922:     my $currentstring = '';
1.325     albertel 3923:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3924: 	$currentstring = $token->[4];     
                   3925:     } 
                   3926:     return $currentstring;
                   3927: }
                   3928: 
                   3929: sub end_fieldset {
                   3930:     my ($target,$token) = @_;
                   3931:     my $currentstring = '';
1.325     albertel 3932:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3933: 	$currentstring = $token->[2];    
                   3934:     } 
                   3935:     return $currentstring;
                   3936: }
                   3937: 
1.181     sakharuk 3938: #-- <frame> tag (end tag forbidden)
1.122     albertel 3939: sub start_frame {
                   3940:     my ($target,$token) = @_;
                   3941:     my $currentstring = '';
1.325     albertel 3942:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3943: 	$currentstring = $token->[4];     
                   3944:     } 
                   3945:     return $currentstring;
                   3946: }
                   3947: 
                   3948: sub end_frame {
                   3949:     my ($target,$token) = @_;
                   3950:     my $currentstring = '';
1.325     albertel 3951:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3952: 	$currentstring = $token->[2];    
                   3953:     } 
                   3954:     return $currentstring;
                   3955: }
                   3956: 
1.181     sakharuk 3957: #-- <iframe> tag (end tag required)
1.122     albertel 3958: sub start_iframe {
                   3959:     my ($target,$token) = @_;
                   3960:     my $currentstring = '';
1.325     albertel 3961:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3962: 	$currentstring = $token->[4];     
                   3963:     } 
                   3964:     return $currentstring;
                   3965: }
                   3966: 
                   3967: sub end_iframe {
                   3968:     my ($target,$token) = @_;
                   3969:     my $currentstring = '';
1.325     albertel 3970:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3971: 	$currentstring = $token->[2];    
                   3972:     } 
                   3973:     return $currentstring;
                   3974: }
                   3975: 
1.181     sakharuk 3976: #-- <ins> tag (end tag required)
1.122     albertel 3977: sub start_ins {
                   3978:     my ($target,$token) = @_;
                   3979:     my $currentstring = '';
1.325     albertel 3980:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3981: 	$currentstring = $token->[4];     
                   3982:     } 
                   3983:     return $currentstring;
                   3984: }
                   3985: 
                   3986: sub end_ins {
                   3987:     my ($target,$token) = @_;
                   3988:     my $currentstring = '';
1.325     albertel 3989:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 3990: 	$currentstring = $token->[2];    
                   3991:     } 
                   3992:     return $currentstring;
                   3993: }
                   3994: 
1.181     sakharuk 3995: #-- <isindex> tag (end tag forbidden)
1.122     albertel 3996: sub start_isindex {
                   3997:     my ($target,$token) = @_;
                   3998:     my $currentstring = '';
1.325     albertel 3999:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4000: 	$currentstring = $token->[4];     
                   4001:     } 
                   4002:     return $currentstring;
                   4003: }
                   4004: 
                   4005: sub end_isindex {
                   4006:     my ($target,$token) = @_;
                   4007:     my $currentstring = '';
1.325     albertel 4008:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4009: 	$currentstring = $token->[2];    
                   4010:     } 
                   4011:     return $currentstring;
                   4012: }
                   4013: 
1.181     sakharuk 4014: #-- <keygen> tag (end tag forbidden)
1.122     albertel 4015: sub start_keygen {
                   4016:     my ($target,$token) = @_;
                   4017:     my $currentstring = '';
1.325     albertel 4018:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4019: 	$currentstring = $token->[4];     
                   4020:     } 
                   4021:     return $currentstring;
                   4022: }
                   4023: 
                   4024: sub end_keygen {
                   4025:     my ($target,$token) = @_;
                   4026:     my $currentstring = '';
1.325     albertel 4027:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4028: 	$currentstring = $token->[2];    
                   4029:     } 
                   4030:     return $currentstring;
                   4031: }
                   4032: 
                   4033: #-- <label> tag
                   4034: sub start_label {
                   4035:     my ($target,$token) = @_;
                   4036:     my $currentstring = '';
1.325     albertel 4037:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4038: 	$currentstring = $token->[4];     
                   4039:     } 
                   4040:     return $currentstring;
                   4041: }
                   4042: 
                   4043: sub end_label {
                   4044:     my ($target,$token) = @_;
                   4045:     my $currentstring = '';
1.325     albertel 4046:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4047: 	$currentstring = $token->[2];    
                   4048:     } 
                   4049:     return $currentstring;
                   4050: }
                   4051: 
1.181     sakharuk 4052: #-- <layer> tag (end tag required)
1.122     albertel 4053: sub start_layer {
                   4054:     my ($target,$token) = @_;
                   4055:     my $currentstring = '';
1.325     albertel 4056:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4057: 	$currentstring = $token->[4];     
                   4058:     } 
                   4059:     return $currentstring;
                   4060: }
                   4061: 
                   4062: sub end_layer {
                   4063:     my ($target,$token) = @_;
                   4064:     my $currentstring = '';
1.325     albertel 4065:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4066: 	$currentstring = $token->[2];    
                   4067:     } 
                   4068:     return $currentstring;
                   4069: }
                   4070: 
1.181     sakharuk 4071: #-- <legend> tag (end tag required)
1.122     albertel 4072: sub start_legend {
                   4073:     my ($target,$token) = @_;
                   4074:     my $currentstring = '';
1.325     albertel 4075:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4076: 	$currentstring = $token->[4];     
                   4077:     } 
                   4078:     return $currentstring;
                   4079: }
                   4080: 
                   4081: sub end_legend {
                   4082:     my ($target,$token) = @_;
                   4083:     my $currentstring = '';
1.325     albertel 4084:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4085: 	$currentstring = $token->[2];    
                   4086:     } 
                   4087:     return $currentstring;
                   4088: }
                   4089: 
1.181     sakharuk 4090: #-- <link> tag (end tag forbidden)
1.122     albertel 4091: sub start_link {
1.292     albertel 4092:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1.122     albertel 4093:     my $currentstring = '';
1.324     albertel 4094:     if ($target eq 'web' || $target eq 'webgrade') {
1.291     albertel 4095: 	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
                   4096: 					    undef,1);
                   4097: 	&Apache::lonxml::extlink($href);
1.122     albertel 4098: 	$currentstring = $token->[4];     
                   4099:     } 
                   4100:     return $currentstring;
                   4101: }
                   4102: 
                   4103: sub end_link {
                   4104:     my ($target,$token) = @_;
                   4105:     my $currentstring = '';
1.325     albertel 4106:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4107: 	$currentstring = $token->[2];    
                   4108:     } 
                   4109:     return $currentstring;
                   4110: }
                   4111: 
1.181     sakharuk 4112: #-- <marquee> tag (end tag optional)
1.122     albertel 4113: sub start_marquee {
                   4114:     my ($target,$token) = @_;
                   4115:     my $currentstring = '';
1.325     albertel 4116:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4117: 	$currentstring = $token->[4];     
                   4118:     } 
                   4119:     return $currentstring;
                   4120: }
                   4121: 
                   4122: sub end_marquee {
                   4123:     my ($target,$token) = @_;
                   4124:     my $currentstring = '';
1.325     albertel 4125:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4126: 	$currentstring = $token->[2];    
                   4127:     } 
                   4128:     return $currentstring;
                   4129: }
                   4130: 
1.179     sakharuk 4131: #-- <multicol> tag (end tag required)
                   4132: sub start_multicol {
1.122     albertel 4133:     my ($target,$token) = @_;
1.279     foxr     4134:     my $currentstring = &end_p();	# Close any pending <p>
1.325     albertel 4135:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     4136: 	$currentstring .= $token->[4];     
1.122     albertel 4137:     } 
                   4138:     return $currentstring;
                   4139: }
                   4140: 
1.179     sakharuk 4141: sub end_multicol {
1.122     albertel 4142:     my ($target,$token) = @_;
                   4143:     my $currentstring = '';
1.325     albertel 4144:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4145: 	$currentstring = $token->[2];    
                   4146:     } 
                   4147:     return $currentstring;
                   4148: }
                   4149: 
1.179     sakharuk 4150: #-- <nobr> tag (end tag required)
1.122     albertel 4151: sub start_nobr {
                   4152:     my ($target,$token) = @_;
                   4153:     my $currentstring = '';
1.325     albertel 4154:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4155: 	$currentstring = $token->[4];     
1.179     sakharuk 4156:     }  elsif ($target eq 'tex') {
                   4157: 	$currentstring='\mbox{';
                   4158:     }
1.122     albertel 4159:     return $currentstring;
                   4160: }
                   4161: 
                   4162: sub end_nobr {
                   4163:     my ($target,$token) = @_;
                   4164:     my $currentstring = '';
1.325     albertel 4165:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4166: 	$currentstring = $token->[2];    
1.179     sakharuk 4167:     }   elsif ($target eq 'tex') {
                   4168: 	$currentstring='}';
                   4169:     }
1.122     albertel 4170:     return $currentstring;
                   4171: }
                   4172: 
1.179     sakharuk 4173: #-- <noembed> tag (end tag required)
1.122     albertel 4174: sub start_noembed {
                   4175:     my ($target,$token) = @_;
                   4176:     my $currentstring = '';
1.325     albertel 4177:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4178: 	$currentstring = $token->[4];     
                   4179:     } 
                   4180:     return $currentstring;
                   4181: }
                   4182: 
                   4183: sub end_noembed {
                   4184:     my ($target,$token) = @_;
                   4185:     my $currentstring = '';
1.325     albertel 4186:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4187: 	$currentstring = $token->[2];    
                   4188:     } 
                   4189:     return $currentstring;
                   4190: }
                   4191: 
1.179     sakharuk 4192: #-- <noframes> tag (end tag required)
1.122     albertel 4193: sub start_noframes {
                   4194:     my ($target,$token) = @_;
                   4195:     my $currentstring = '';
1.325     albertel 4196:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4197: 	$currentstring = $token->[4];     
                   4198:     } 
                   4199:     return $currentstring;
                   4200: }
                   4201: 
                   4202: sub end_noframes {
                   4203:     my ($target,$token) = @_;
                   4204:     my $currentstring = '';
1.325     albertel 4205:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4206: 	$currentstring = $token->[2];    
                   4207:     } 
                   4208:     return $currentstring;
                   4209: }
                   4210: 
1.179     sakharuk 4211: #-- <nolayer> tag (end tag required)
1.122     albertel 4212: sub start_nolayer {
                   4213:     my ($target,$token) = @_;
                   4214:     my $currentstring = '';
1.325     albertel 4215:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4216: 	$currentstring = $token->[4];     
                   4217:     } 
                   4218:     return $currentstring;
                   4219: }
                   4220: 
                   4221: sub end_nolayer {
                   4222:     my ($target,$token) = @_;
                   4223:     my $currentstring = '';
1.325     albertel 4224:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4225: 	$currentstring = $token->[2];    
                   4226:     } 
                   4227:     return $currentstring;
                   4228: }
                   4229: 
1.179     sakharuk 4230: #-- <noscript> tag (end tag required)
1.122     albertel 4231: sub start_noscript {
                   4232:     my ($target,$token) = @_;
                   4233:     my $currentstring = '';
1.325     albertel 4234:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4235: 	$currentstring = $token->[4];     
                   4236:     } 
                   4237:     return $currentstring;
                   4238: }
                   4239: 
                   4240: sub end_noscript {
                   4241:     my ($target,$token) = @_;
                   4242:     my $currentstring = '';
1.325     albertel 4243:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4244: 	$currentstring = $token->[2];    
                   4245:     } 
                   4246:     return $currentstring;
                   4247: }
                   4248: 
1.179     sakharuk 4249: #-- <object> tag (end tag required)
1.122     albertel 4250: sub start_object {
                   4251:     my ($target,$token) = @_;
                   4252:     my $currentstring = '';
1.325     albertel 4253:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4254: 	$currentstring = $token->[4];     
                   4255:     } 
                   4256:     return $currentstring;
                   4257: }
                   4258: 
                   4259: sub end_object {
                   4260:     my ($target,$token) = @_;
                   4261:     my $currentstring = '';
1.325     albertel 4262:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4263: 	$currentstring = $token->[2];    
                   4264:     } 
                   4265:     return $currentstring;
                   4266: }
                   4267: 
1.179     sakharuk 4268: #-- <optgroup> tag (end tag required)
1.122     albertel 4269: sub start_optgroup {
                   4270:     my ($target,$token) = @_;
                   4271:     my $currentstring = '';
1.325     albertel 4272:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4273: 	$currentstring = $token->[4];     
                   4274:     } 
                   4275:     return $currentstring;
                   4276: }
                   4277: 
                   4278: sub end_optgroup {
                   4279:     my ($target,$token) = @_;
                   4280:     my $currentstring = '';
1.325     albertel 4281:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4282: 	$currentstring = $token->[2];    
                   4283:     } 
                   4284:     return $currentstring;
                   4285: }
                   4286: 
1.179     sakharuk 4287: #-- <samp> tag (end tag required)
1.122     albertel 4288: sub start_samp {
                   4289:     my ($target,$token) = @_;
                   4290:     my $currentstring = '';
1.325     albertel 4291:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4292: 	$currentstring = $token->[4];     
1.179     sakharuk 4293:     } elsif ($target eq 'tex') {
                   4294: 	$currentstring='\texttt{';
                   4295:     }
1.122     albertel 4296:     return $currentstring;
                   4297: }
                   4298: 
                   4299: sub end_samp {
                   4300:     my ($target,$token) = @_;
                   4301:     my $currentstring = '';
1.325     albertel 4302:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4303: 	$currentstring = $token->[2];    
1.179     sakharuk 4304:     } elsif ($target eq 'tex') {
                   4305: 	$currentstring='}';
                   4306:     }
1.122     albertel 4307:     return $currentstring;
                   4308: }
                   4309: 
                   4310: #-- <server> tag
                   4311: sub start_server {
                   4312:     my ($target,$token) = @_;
                   4313:     my $currentstring = '';
1.325     albertel 4314:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4315: 	$currentstring = $token->[4];     
                   4316:     } 
                   4317:     return $currentstring;
                   4318: }
                   4319: 
                   4320: sub end_server {
                   4321:     my ($target,$token) = @_;
                   4322:     my $currentstring = '';
1.325     albertel 4323:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4324: 	$currentstring = $token->[2];    
                   4325:     } 
                   4326:     return $currentstring;
                   4327: }
                   4328: 
1.179     sakharuk 4329: #-- <spacer> tag (end tag forbidden)
1.122     albertel 4330: sub start_spacer {
                   4331:     my ($target,$token) = @_;
1.279     foxr     4332:     my $currentstring = &end_p();	# Close off any open <p> tag.
1.325     albertel 4333:     if ($target eq 'web' || $target eq 'webgrade') {
1.277     foxr     4334: 	$currentstring .= $token->[4];     
1.122     albertel 4335:     } 
                   4336:     return $currentstring;
                   4337: }
                   4338: 
                   4339: sub end_spacer {
                   4340:     my ($target,$token) = @_;
                   4341:     my $currentstring = '';
1.325     albertel 4342:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4343: 	$currentstring = $token->[2];    
                   4344:     } 
                   4345:     return $currentstring;
                   4346: }
                   4347: 
1.179     sakharuk 4348: #-- <span> tag (end tag required)
1.122     albertel 4349: sub start_span {
                   4350:     my ($target,$token) = @_;
                   4351:     my $currentstring = '';
1.325     albertel 4352:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4353: 	$currentstring = $token->[4];     
                   4354:     } 
                   4355:     return $currentstring;
                   4356: }
                   4357: 
                   4358: sub end_span {
                   4359:     my ($target,$token) = @_;
                   4360:     my $currentstring = '';
1.325     albertel 4361:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4362: 	$currentstring = $token->[2];    
                   4363:     } 
                   4364:     return $currentstring;
                   4365: }
                   4366: 
1.179     sakharuk 4367: #-- <tbody> tag (end tag optional)
1.122     albertel 4368: sub start_tbody {
                   4369:     my ($target,$token) = @_;
                   4370:     my $currentstring = '';
1.325     albertel 4371:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4372: 	$currentstring = $token->[4];     
                   4373:     } 
                   4374:     return $currentstring;
                   4375: }
                   4376: 
                   4377: sub end_tbody {
                   4378:     my ($target,$token) = @_;
                   4379:     my $currentstring = '';
1.325     albertel 4380:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4381: 	$currentstring = $token->[2];    
                   4382:     } 
                   4383:     return $currentstring;
                   4384: }
                   4385: 
1.166     sakharuk 4386: #-- <tfoot> tag (end tag optional)
1.122     albertel 4387: sub start_tfoot {
                   4388:     my ($target,$token) = @_;
                   4389:     my $currentstring = '';
1.325     albertel 4390:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4391: 	$currentstring = $token->[4];     
                   4392:     } 
                   4393:     return $currentstring;
                   4394: }
                   4395: 
                   4396: sub end_tfoot {
                   4397:     my ($target,$token) = @_;
                   4398:     my $currentstring = '';
1.325     albertel 4399:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4400: 	$currentstring = $token->[2];    
                   4401:     } 
                   4402:     return $currentstring;
                   4403: }
                   4404: 
1.166     sakharuk 4405: #-- <thead> tag (end tag optional)
1.122     albertel 4406: sub start_thead {
                   4407:     my ($target,$token) = @_;
                   4408:     my $currentstring = '';
1.325     albertel 4409:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4410: 	$currentstring = $token->[4];     
                   4411:     } 
                   4412:     return $currentstring;
                   4413: }
1.10      www      4414: 
1.122     albertel 4415: sub end_thead {
                   4416:     my ($target,$token) = @_;
                   4417:     my $currentstring = '';
1.325     albertel 4418:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4419: 	$currentstring = $token->[2];    
                   4420:     } 
                   4421:     return $currentstring;
                   4422: }
1.119     www      4423: 
1.122     albertel 4424: #-- <var> tag
                   4425: sub start_var {
1.44      sakharuk 4426:     my ($target,$token) = @_;
                   4427:     my $currentstring = '';
1.325     albertel 4428:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4429: 	$currentstring = $token->[4];     
1.163     sakharuk 4430:     } elsif ($target eq 'tex') {
                   4431: 	$currentstring = '\textit{'; 
                   4432:     }
1.44      sakharuk 4433:     return $currentstring;
                   4434: }
1.10      www      4435: 
1.122     albertel 4436: sub end_var {
                   4437:     my ($target,$token) = @_;
1.44      sakharuk 4438:     my $currentstring = '';
1.325     albertel 4439:     if ($target eq 'web' || $target eq 'webgrade') {
1.163     sakharuk 4440: 	$currentstring = $token->[2];
                   4441:     } elsif ($target eq 'tex') {
                   4442: 	$currentstring = '}'; 
1.44      sakharuk 4443:     } 
                   4444:     return $currentstring;
                   4445: }
1.119     www      4446: 
1.163     sakharuk 4447: #-- <wbr> tag (end tag forbidden)
1.122     albertel 4448: sub start_wbr {
                   4449:     my ($target,$token) = @_;
                   4450:     my $currentstring = '';
1.325     albertel 4451:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4452: 	$currentstring = $token->[4];     
                   4453:     } 
                   4454:     return $currentstring;
1.98      albertel 4455: }
                   4456: 
1.122     albertel 4457: sub end_wbr {
                   4458:     my ($target,$token) = @_;
                   4459:     my $currentstring = '';
1.325     albertel 4460:     if ($target eq 'web' || $target eq 'webgrade') {
1.122     albertel 4461: 	$currentstring = $token->[2];    
                   4462:     } 
                   4463:     return $currentstring;
1.98      albertel 4464: }
1.134     sakharuk 4465: 
                   4466: #-- <hideweboutput> tag
                   4467: sub start_hideweboutput {
                   4468:     my ($target,$token) = @_;
1.325     albertel 4469:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4470: 	&Apache::lonxml::startredirection();     
                   4471:     } 
                   4472:     return '';
                   4473: }
                   4474: 
                   4475: sub end_hideweboutput {
                   4476:     my ($target,$token) = @_;
                   4477:     my $currentstring = '';
1.325     albertel 4478:     if ($target eq 'web' || $target eq 'webgrade') {
1.134     sakharuk 4479: 	$currentstring = &Apache::lonxml::endredirection();    
                   4480:     } 
                   4481:     return '';
                   4482: }
                   4483: 
1.94      sakharuk 4484: 
                   4485: sub image_replication {
                   4486:     my $src = shift;
1.187     albertel 4487:     if (not -e $src) { &Apache::lonnet::repcopy($src); }
                   4488:     #replicates eps or ps 
                   4489:     my $epssrc = my $pssrc = $src;
                   4490:     $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
                   4491:     $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
                   4492:     if (not -e $epssrc && not -e $pssrc) {
                   4493: 	my $result=&Apache::lonnet::repcopy($epssrc);
1.264     raeburn  4494: 	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
1.94      sakharuk 4495:     }
                   4496:     return '';
1.195     sakharuk 4497: }
1.397     jms      4498: 
                   4499: 
                   4500: 
1.275     foxr     4501: sub resize_image {
                   4502:     my ($height_param, $width_param, $scaling,
                   4503: 	$parstack, $safeeval, $depth, $cis) = @_;
                   4504: 
                   4505:     # First apply the scaling...
1.271     foxr     4506: 
1.275     foxr     4507:     $height_param = $height_param * $scaling;
                   4508:     $width_param  = $width_param  * $scaling;
1.261     foxr     4509: 
1.197     sakharuk 4510:     #do we have any specified LaTeX size of the picture?
1.261     foxr     4511:     my $toget='TeXwidth'; 
                   4512:     if ($cis) { 
                   4513: 	$toget=lc($toget); 
                   4514:     }
1.256     albertel 4515:     my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
                   4516: 					      $safeeval,$depth,$cis);
                   4517:     $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
                   4518:     my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
                   4519: 					       $safeeval,$depth,$cis);
1.197     sakharuk 4520:     #do we have any specified web size of the picture?
                   4521:     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
1.256     albertel 4522: 					   $depth,1);
                   4523:     if ($TeXwidth) { 
1.252     matthew  4524: 	my $old_width_param=$width_param;
1.197     sakharuk 4525: 	if ($TeXwidth=~/(\d+)\s*\%/) {
1.267     albertel 4526: 	    $width_param = $1*$env{'form.textwidth'}/100;
1.197     sakharuk 4527: 	} else { 
                   4528: 	    $width_param = $TeXwidth;
                   4529: 	}
1.266     albertel 4530: 	if ($TeXheight) {
                   4531: 	    $height_param = $TeXheight;
                   4532: 	} elsif ($old_width_param) {
                   4533: 	    $height_param=$TeXwidth/$old_width_param*$height_param;
                   4534: 	}
1.256     albertel 4535:     } elsif ($TeXheight) {
1.248     foxr     4536: 	$height_param = $TeXheight;
1.266     albertel 4537: 	if ($height_param) {
                   4538: 	    $width_param  = $TeXheight/$height_param*$width_param;
                   4539: 	}
1.256     albertel 4540:     } elsif ($width) {
1.252     matthew  4541: 	my $old_width_param=$width_param;
1.256     albertel 4542: 	$width_param = $width*$scaling;
1.266     albertel 4543: 	if ($old_width_param) {
                   4544: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4545: 	}
1.252     matthew  4546:     }
1.267     albertel 4547:     if ($width_param > $env{'form.textwidth'}) {
1.252     matthew  4548:         my $old_width_param=$width_param;
1.267     albertel 4549: 	$width_param =0.95*$env{'form.textwidth'};
1.266     albertel 4550: 	if ($old_width_param) {
                   4551: 	    $height_param=$width_param/$old_width_param*$height_param;
                   4552: 	}
1.197     sakharuk 4553:     }
1.275     foxr     4554: 
                   4555:     return ($height_param, $width_param);
                   4556: }
                   4557: 
                   4558: sub image_size {
                   4559:     my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
                   4560: 
                   4561:     #size of image from gif/jpg/jpeg/png 
                   4562:     my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                   4563:     if (-e $ressrc) {
                   4564: 	$src = $ressrc;
                   4565:     }
                   4566:     my $image = Image::Magick->new;
                   4567:     my $current_figure = $image->Read($src);
                   4568:     my $width_param = $image->Get('width');
                   4569:     my $height_param = $image->Get('height');
                   4570:     &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
                   4571:     undef($image);
                   4572: 
                   4573:     ($height_param, $width_param) = &resize_image($height_param, $width_param,
                   4574: 						  $scaling, $parstack, $safeeval, 
                   4575: 						  $depth, $cis);
                   4576: 
1.248     foxr     4577:     return ($height_param, $width_param);
                   4578: }
                   4579: 
                   4580: sub image_width {
                   4581:     my ($height, $width) = &image_size(@_);
                   4582:     return $width;
                   4583: }
                   4584: #  Not yet 100% sure this is correct in all circumstances..
                   4585: #  due to my uncertainty about mods to image_size.
                   4586: #
                   4587: sub image_height {
                   4588:     my ($height, $width) = &image_size(@_);
                   4589:     return $height;
1.197     sakharuk 4590: }
                   4591: 
1.256     albertel 4592: sub get_eps_image {
                   4593:     my ($src)=@_;
1.261     foxr     4594:     my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
1.285     foxr     4595: 
                   4596:     # In order to prevent the substitution of the alt text, we need to
                   4597:     # be sure the orig_src file is on system now so:
                   4598: 
                   4599:     if (! -e $orig_src) {
                   4600: 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
                   4601:     }
1.275     foxr     4602:     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
1.390     foxr     4603:     my ($spath, $sname, $sext) = &fileparse($src, qr/\.(bmp|gif|png|jpg|jpeg)/i);
                   4604:     $src=~s/\.(bmp|gif|png|jpg|jpeg)$/\.eps/i;
1.256     albertel 4605:     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
1.275     foxr     4606:     &Apache::lonxml::debug("Filelocation gives: $src");
1.256     albertel 4607:     if (! -e $src) {
1.261     foxr     4608: 	&Apache::lonxml::debug("$src does not exist");
1.264     raeburn  4609: 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
1.261     foxr     4610: 	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
1.256     albertel 4611: 	    #if replication failed try to find ps file
                   4612: 	    $src=~s/\.eps$/\.ps/;
1.261     foxr     4613: 	    &Apache::lonxml::debug("Now looking for $src");
1.270     foxr     4614: 	    #if no ps file try to replicate it.
                   4615: 	    my $didrepcopy = &Apache::lonnet::repcopy($src);
                   4616: 	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
                   4617: 	    if ( (not -e $src) ||
                   4618: 		($didrepcopy ne 'ok')) {
1.261     foxr     4619: 		&Apache::lonxml::debug("Failed to find or replicate $src");
                   4620: 
1.256     albertel 4621: 		#if replication failed try to produce eps file dynamically
                   4622: 		$src=~s/\.ps$/\.eps/;
                   4623: 		my $temp_file;
1.267     albertel 4624: 		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.256     albertel 4625: 		my $newsrc=$orig_src;
                   4626: 		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
1.275     foxr     4627: 		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
1.344     albertel 4628: 		print FILE ("$newsrc\n");
                   4629: 		close(FILE);
1.256     albertel 4630: 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4631: 		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.283     albertel 4632: 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
                   4633: 		    $src =~ s/\.eps$/$sext.eps/;
                   4634: 		}
1.341     foxr     4635: 
1.256     albertel 4636: 	    }
1.343     foxr     4637: 
1.256     albertel 4638: 	}
1.341     foxr     4639:     } else {
                   4640: 	# If the postscript file has spaces in its name,
                   4641: 	# LaTeX will gratuitiously vomit.  Therefore
                   4642: 	# queue such files for copy with " " replaced by "_".
                   4643: 	# printout.pm will know them by their .ps  or .eps extensions.
                   4644: 	my $newsrc = $orig_src;
                   4645: 	$newsrc    =~  s|(.*)/res/|/home/httpd/html/res/|;
                   4646: 	open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
1.343     foxr     4647: 	print FILE "$src\n";
1.341     foxr     4648: 	close FILE;
                   4649: 	$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
                   4650: 	$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
1.256     albertel 4651:     }
                   4652:     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
1.344     albertel 4653:     $path =~ s/ /\_/g;
1.343     foxr     4654:     $file =~ s/ /\_/g;
1.261     foxr     4655:     &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
1.256     albertel 4656:     return ($path.'/',$file);
                   4657: }
                   4658: 
1.195     sakharuk 4659: sub eps_generation {
                   4660:     my ($src,$file,$width_param) = @_;	     
1.267     albertel 4661:     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
1.195     sakharuk 4662:     my $temp_file = Apache::File->new('>>'.$filename); 
                   4663:     print $temp_file "$src\n";
                   4664:     my $newsrc = $src;
1.390     foxr     4665:     $newsrc =~ s/(\.bmp|\.gif|\.jpg|\.jpeg)$/\.eps/i;
1.345     albertel 4666:     $newsrc=~s{/home/httpd/html/res}{};
                   4667:     $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
                   4668:     $newsrc=~s{/\./}{/};
                   4669:     $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
                   4670:     if ($newsrc=~m{/home/httpd/lonUsers/}) {
                   4671: 	$newsrc=~s{/home/httpd/lonUsers}{};
                   4672: 	$newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
1.213     sakharuk 4673:     }
1.345     albertel 4674:     if ($newsrc=~m{/userfiles/}) {
1.239     sakharuk 4675: 	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4676:     } else {
                   4677: 	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
                   4678:     }
1.197     sakharuk 4679: }
                   4680: 
                   4681: sub file_path {     
                   4682:     my $src=shift;
                   4683:     my ($file,$path); 
                   4684:     if ($src =~ m!(.*)/([^/]*)$!) {
                   4685: 	$file = $2; 
                   4686: 	$path = $1.'/'; 
                   4687:     } 
                   4688:     return $file,$path;
1.126     sakharuk 4689: }
1.397     jms      4690: 
                   4691: 
1.126     sakharuk 4692: sub recalc {
                   4693:     my $argument = shift;
                   4694:     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
1.132     sakharuk 4695:     $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
1.126     sakharuk 4696:     my $value=$1;
                   4697:     my $units=$2;
                   4698:     if ($units eq 'cm') {
                   4699: 	$value*=10;
                   4700:     } elsif ($units eq 'in') {
                   4701: 	$value*=25.4;
                   4702:     } elsif ($units eq 'pc') {
                   4703: 	$value*=(25.4*12/72.27);
                   4704:     } elsif ($units eq 'pt') {
                   4705: 	$value*=(25.4/72.27);
                   4706:     }
                   4707:     return $value.' mm';
1.94      sakharuk 4708: }
1.184     sakharuk 4709: 
                   4710: sub LATEX_length {
                   4711:     my $garbage=shift;
1.206     sakharuk 4712:     $garbage=~s/^\s+$//;
                   4713:     $garbage=~s/^\s+(\S.*)/$1/;#space before 
                   4714:     $garbage=~s/(.*\S)\s+$/$1/;#space after 
                   4715:     $garbage=~s/(\s)+/$1/;#only one space
                   4716:     $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
                   4717:     $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
                   4718:     $garbage=~s/([^\\])\$/$1/g;#$
                   4719:     $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
                   4720:    $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 4721:     $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;
                   4722:     $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;
                   4723:     $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 4724:     $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;
                   4725:     $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;
                   4726:     $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
                   4727:     #remove some other LaTeX command
                   4728:     $garbage=~s|\\(\w+)\\|\\|g;	 
                   4729:     $garbage=~s|\\(\w+)(\s*)|$2|g;	 	 
                   4730:     $garbage=~s|\+|11|g;
1.184     sakharuk 4731:     my  $value=length($garbage);
                   4732:     return $value;
                   4733: }
                   4734: 
1.397     jms      4735: 
1.353     foxr     4736: sub align_latex_image {
                   4737:     my ($align, $latex_rendering, $image, $width, $height) = @_;
1.354     foxr     4738:     my $currentstring;        # The 1/2 wrapped image.
                   4739:     my $closure;              # The closure of the wrappage.
1.379     albertel 4740: 
                   4741:     # if it's none just return it back
                   4742:     if ($latex_rendering eq 'none') {
                   4743: 	return ($image,'');
                   4744:     }
                   4745: 
1.353     foxr     4746:     #    If there's an alignment specification we need to honor it here.
                   4747:     #    For the horizontal alignments, we will also honor the
                   4748:     #    value of the latex specfication.  The default is parbox,
                   4749:     #    and that's used for illegal values too.  
                   4750:     #    
                   4751:     #    Even though we set a default alignment value, the user
                   4752:     #    could have given us an illegal value.  In that case we
                   4753:     #    just use the default alignment of bottom..
1.354     foxr     4754:     $currentstring = "\n% figurewrapping \n";
1.353     foxr     4755:     if      ($align eq "top")    {
1.354     foxr     4756: 	$currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
                   4757: 	$closure = '}';
1.353     foxr     4758:     } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
                   4759: 	my $offset = $height/2;
1.354     foxr     4760: 	$currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
                   4761: 	$closure       = '}';
1.353     foxr     4762:     } elsif ($align eq "left")   { 
                   4763: 	if ($latex_rendering eq "parpic") { 
1.354     foxr     4764: 	    $currentstring .= '\parpic[l]{'.$image;
                   4765: 	    $closure       = '}';
1.353     foxr     4766: 	} elsif ($latex_rendering eq "parbox") {
1.354     foxr     4767: 	    $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
                   4768: 		.$image;
                   4769: 	    $closure = '\end{minipage}';
1.353     foxr     4770: 	} elsif ($latex_rendering eq "wrapfigure"
                   4771: 		 || $latex_rendering ne 'none') {  # wrapfig render
1.354     foxr     4772: 	    $currentstring .= 
1.353     foxr     4773: 		'\begin{wrapfigure}{l}{'.$width.'mm}'
1.354     foxr     4774: 		.'\scalebox{1.0}{'.$image;
                   4775: 	    $closure = '}\end{wrapfigure}';
1.353     foxr     4776: 	}
                   4777:     } elsif ($align eq "right")  {   
                   4778: 	if ($latex_rendering eq "parpic") {
1.354     foxr     4779: 	    $currentstring .= '\parpic[r]{'.$image;
                   4780: 	    $closure = '}';
1.353     foxr     4781: 	} elsif ($latex_rendering eq "parbox") {
1.354     foxr     4782: 	    $currentstring .=  '\begin{minipage}[r]{'.$width.'mm}'
                   4783: 		.$image;
                   4784: 	    $closure = '\end{minipage}';
1.353     foxr     4785: 	} elsif ($latex_rendering eq "wrapfigure"
                   4786: 		 || $latex_rendering ne 'none') {  # wrapfig render
1.354     foxr     4787: 	    $currentstring .= 
1.353     foxr     4788: 		'\begin{wrapfigure}{r}{'.$width.'mm}'
1.354     foxr     4789: 		.'\scalebox{1.0}{'.$image;
                   4790: 	    $closure = '}\end{wrapfigure}';
1.353     foxr     4791: 	}
                   4792:     } else {		# Bottom is also default.
                   4793: 	# $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
1.354     foxr     4794: 	$currentstring .= "{$image";
                   4795: 	$closure       = '}';
1.353     foxr     4796:     }
1.354     foxr     4797:     $currentstring .= "\n% end wrappage\n";
                   4798:     $closure        = "\n% Begin closure\n".$closure."\n% End closure\n";
                   4799:     return ($currentstring, $closure);
1.353     foxr     4800: }
1.184     sakharuk 4801: 
1.397     jms      4802: 
1.287     foxr     4803: sub is_inside_of {
                   4804:     my ($tagstack, $tag) = @_;
                   4805:     my @stack = @$tagstack;
                   4806:     for (my $i = ($#stack - 1); $i >= 0; $i--) {
                   4807: 	if ($stack[$i] eq $tag) {
                   4808: 	    return 1;
                   4809: 	}
                   4810:     }
                   4811:     return 0;
                   4812: }
1.184     sakharuk 4813: 
1.94      sakharuk 4814: 
1.399     foxr     4815: #
                   4816: #   This sub provides the typical LaTeX prefix matter for tex output:
                   4817: #
                   4818: sub latex_header
                   4819: {
1.402     foxr     4820:     my ($mode) = @_;
1.399     foxr     4821:     my $currentstring = '';
                   4822: 
                   4823:     $currentstring .= 
1.402     foxr     4824: 	"\n% &Apache::lonxml::londefdef \n" .
1.399     foxr     4825: 	'\documentclass[letterpaper,twoside]{article}\raggedbottom';
                   4826:     if (($env{'form.latex_type'}=~'batchmode') ||
1.402     foxr     4827: 	(!$env{'request.role.adv'}) || 
                   4828: 	($mode eq 'batchmode')) {$currentstring .='\batchmode';} 
1.399     foxr     4829:     $currentstring .= '\newcommand{\keephidden}[1]{}'.
                   4830: 	'\renewcommand{\deg}{$^{\circ}$}'.
                   4831: 	'\usepackage{multirow}'.
                   4832: 	'\usepackage{longtable}'.
                   4833: 	'\usepackage{textcomp}'.
                   4834: 	'\usepackage{makeidx}'.
                   4835: 	'\usepackage[dvips]{graphicx}'.
                   4836: 	'\usepackage{wrapfig}'.
                   4837: 	'\usepackage{picins}'.
                   4838: 	'\usepackage[T1]{fontenc}'."\n".
                   4839: 	'\usepackage{lmodern}'."\n".
                   4840: 	'\usepackage[postscript]{ucs}'."\n".
                   4841: 	'\usepackage[utf8x]{inputenc}'."\n".
                   4842: 	'\usepackage{pifont}' ."\n".
                   4843: 	'\usepackage{latexsym}'."\n".
                   4844: 	'\usepackage{epsfig}'.
                   4845: 	"\\usepackage{xtab}\n".
                   4846: 	"\\usepackage{tabularx}\n".
                   4847: 	"\\usepackage{booktabs}\n".
                   4848: 	"\\usepackage{array}\n".
                   4849: 	"\\usepackage{colortbl}\n".
                   4850: 	"\\usepackage{xcolor}\n".
                   4851: 	'\usepackage{calc}'.
                   4852: 	'\usepackage{amsmath}'.
                   4853: 	'\usepackage{amssymb}'.
                   4854: 	'\usepackage{amsfonts}'.
                   4855: 	'\usepackage{amsthm}'.
1.402     foxr     4856: 	'\usepackage{amscd}'
                   4857:         .'\usepackage{picins}\usepackage{calc}'."\n". # From lonprintout.pm
                   4858: 	'\usepackage[T1]{fontenc}'."\n".
                   4859: 	'\usepackage{lmodern}'."\n".
                   4860: 	'\usepackage[postscript]{ucs}'."\n".
                   4861: 	'\usepackage[utf8x]{inputenc}'."\n".
                   4862: 	'\usepackage{pifont}'  . "\n";
                   4863: 	
1.399     foxr     4864:     if($env{'form.pdfFormFields'} eq 'yes') {
                   4865: 	$currentstring .= '\usepackage{hyperref}'.
                   4866: 	    '\usepackage{eforms}'.
                   4867: 	    '\usepackage{tabularx}';
                   4868:     } 
                   4869:     
                   4870:         $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}}'.
                   4871:                           '\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     4872:     $currentstring .= '\begin{document}';
1.399     foxr     4873:     
                   4874:     return $currentstring;
                   4875: 
                   4876: }
                   4877: 
1.397     jms      4878: =pod
                   4879: 
                   4880: =head1 NAME
                   4881: 
                   4882: Apache::londefdef.pm
                   4883: 
                   4884: =head1 SYNOPSIS
                   4885: 
                   4886: Tags Default Definition Module
                   4887: 
                   4888: This is part of the LearningOnline Network with CAPA project
                   4889: described at http://www.lon-capa.org.
                   4890: 
                   4891: 
                   4892: =head1 NOTABLE SUBROUTINES
                   4893: 
                   4894: =over
                   4895: 
                   4896: =item start_hideweboutput()
                   4897: 
                   4898: =item end_hideweboutput()
                   4899: 
                   4900: =item image_replication()
                   4901: 
                   4902: =item resize_image()
                   4903: 
                   4904: 	Get correct sizing parameter for an image given
                   4905: 	it's initial ht. and wid.  This allows sizing of
                   4906: 	images that are generated on-the-fly (e.g. gnuplot)
                   4907: 	as well as serving as a utility for image_size.
                   4908:  
                   4909: 	Parameter:
                   4910:         height_param
                   4911:         width_param    - Initial picture dimensions.
                   4912:         scaling        - A scale factor.
                   4913:         parstack,      - the current stack of tag attributes 
                   4914:                          from the xml parser
                   4915:         safeeval,      - pointer to the safespace
                   4916:         depth,         - from what level in the stack to look for attributes
                   4917:                          (assumes -1 if unspecified)
                   4918:         cis            - look for attrubutes case insensitively
                   4919:                          (assumes false)
                   4920: 
                   4921: 	Returns:
                   4922: 		height, width   - new dimensions.
                   4923: 
                   4924: =item image_size()
                   4925: 
                   4926: =item image_width()
                   4927: 
                   4928: =item image_height()
                   4929: 
                   4930: =item get_eps_image()
                   4931: 
                   4932: =item eps_generation()
                   4933: 
                   4934: =item file_path()
                   4935: 
                   4936: =item recalc()
                   4937: 
                   4938: 	Converts a measurement in to mm from any of 
                   4939: 	the other valid LaTeX units of measure.
                   4940: 	If the units of measure are missing from the 
                   4941: 	parameter, it is assumed to be in and returned
                   4942: 	with mm units of measure
                   4943: 
                   4944: =item LATEX_length()
                   4945: 
                   4946: =item align_latex_image()
                   4947: 
                   4948:   	Wrap image 'stuff' inside of the LaTeX required to implement 
                   4949:    	alignment:
                   4950:      	align_tex_image(align, latex_rendering, image)
                   4951:    	Where:
                   4952:      	align   - The HTML alignment specification.
                   4953:      	latex_rendering - rendering hint for latex.
                   4954:      	image   - The LaTeX needed to insert the image itsef.
                   4955:      	width,height - dimensions of the image.
                   4956:  	Returns:
                   4957:     	The 1/2 wrapped image and the stuff required to close the
                   4958:     	wrappage.  This allows e.g. randomlabel to insert more stuff
                   4959:     	into the closure.
                   4960: 
                   4961: 
                   4962: =item is_inside_of($tagstack, $tag)
                   4963:    	This sub returns true if the current state of Xml processing is inside of the tag.   
                   4964: 	Parameters:
                   4965:     	tagstack   - The tagstack from the parser.
                   4966:     	tag        - The tag (without the <>'s.).
                   4967: 	Sample usage:
                   4968:     	if (is_inside_of($tagstack "table")) {
                   4969:      	   I'm in a table....
                   4970:      	}
                   4971: 
                   4972: 
                   4973: 
                   4974: =back
                   4975: 
                   4976: =cut
                   4977: 
                   4978: 
1.1       sakharuk 4979: 1;
                   4980: __END__

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