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Diff for /loncom/xml/londefdef.pm between versions 1.158 and 1.278

version 1.158, 2003/08/01 13:35:20	version 1.278, 2005/07/10 21:43:35
Line 36	Line 36
# The C source of the Code may not be distributed by the Licensee	# The C source of the Code may not be distributed by the Licensee
# to any other parties under any circumstances.	# to any other parties under any circumstances.
#	#
#
# last modified 06/26/00 by Alexander Sakharuk
# 11/6,11/30,02/01/01,5/4 Gerd Kortemeyer
# 01/18 Alex Sakharuk

package Apache::londefdef;	package Apache::londefdef;

use Apache::lonnet();	use Apache::lonnet;
use strict;	use strict;
use Apache::lonxml;	use Apache::lonxml;
use Apache::File();	use Apache::File();
use Image::Magick;	use Image::Magick;
use Apache::lonmenu();	use Apache::lonmenu();
use Apache::lonmeta();	use Apache::lonmeta();
	use Apache::Constants qw(:common);


BEGIN {	BEGIN {

Line 57 BEGIN {	Line 55 BEGIN {

}	}

	sub initialize_londefdef {
	$Apache::londefdef::TD_redirection=0;
	@Apache::londefdef::table = ();
	$Apache::londefdef::select=0;
	undef(@Apache::londefdef::description);
	@Apache::londefdef::DD=(0);
	@Apache::londefdef::DT=(0);
	@Apache::londefdef::seenDT=(0);
	$Apache::londefdef::list_index=0;
	}

#======================= TAG SUBROUTINES =====================	#======================= TAG SUBROUTINES =====================
#-- <output>	#-- <output>
sub start_output {	sub start_output {
Line 71 sub end_output {	Line 80 sub end_output {
}	}
#-- <m> tag	#-- <m> tag
sub start_m {	sub start_m {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
$Apache::lonxml::prevent_entity_encode++;	if ($target eq 'web' \|\| $target eq 'analyze') {
my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
$inside ='\\documentstyle{article}'.$inside;
&Apache::lonxml::debug("M is starting with:$inside:");	&Apache::lonxml::debug("M is starting with:$inside:");
my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
if ($eval eq 'on') {	if ($eval eq 'on') {
$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);	$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
#&Apache::lonxml::debug("M is evaulated to:$inside:");	#&Apache::lonxml::debug("M is evaulated to:$inside:");
}	}
$currentstring = &Apache::lontexconvert::converted(\$inside);	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
if ($Apache::lontexconvert::errorstring) {	if ($Apache::lontexconvert::errorstring) {
&Apache::lonxml::warning("tth error: ".	&Apache::lonxml::warning("tth error: ".
$Apache::lontexconvert::errorstring);	$Apache::lontexconvert::errorstring);
$Apache::lontexconvert::errorstring='';	$Apache::lontexconvert::errorstring='';
}	}
#&Apache::lonxml::debug("M is ends with:$currentstring:");	#&Apache::lonxml::debug("M is ends with:$currentstring:");
	$Apache::lonxml::post_evaluate=0;
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);	$currentstring = $inside;
	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
	if ($eval eq 'on') {
	$currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
	}
if ($currentstring=~/^(\s\\\\\s)*$/) {$currentstring = ' \vskip 0 mm ';}	if ($currentstring=~/^(\s\\\\\s)*$/) {$currentstring = ' \vskip 0 mm ';}
} else {	# detect simple math mode entry exits, and convert them
my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);	# to use \ensuremath
	if ($currentstring=~/^\s\$[^\$].[^\$]\$\s*$/) {
	$currentstring=~s/^\$//;
	$currentstring=~s/\$$//;
	$currentstring='\ensuremath{'.$currentstring.'}';
	}
	$Apache::lonxml::post_evaluate=0;
}	}
return $currentstring;	return $currentstring;
}	}
Line 102 sub start_m {	Line 121 sub start_m {
sub end_m {	sub end_m {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'tex') {
$Apache::lonxml::prevent_entity_encode--;
} elsif ($target eq 'tex') {
$currentstring = "";	$currentstring = "";
} elsif ($target eq 'meta') {
}	}
return $currentstring;	return $currentstring;
}	}
Line 117 sub start_tthoption {	Line 133 sub start_tthoption {
if ($target eq 'web') {	if ($target eq 'web') {
my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser);	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser);
$inside=~s/^\s*//;	$inside=~s/^\s*//;
if ($ENV{'browser.mathml'}) {	if ($env{'browser.mathml'}) {
&tth::ttmoptions($inside);	&tth::ttmoptions($inside);
} else {	} else {
&tth::tthoptions($inside);	&tth::tthoptions($inside);
Line 132 sub end_tthoption {	Line 148 sub end_tthoption {
return $result;	return $result;
}	}

#-- <html> tag	#-- <html> tag (end tag optional)
sub start_html {	sub start_html {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($ENV{'browser.mathml'}) {	my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
&tth::ttminit();	&Apache::lontexconvert::init_tth();
if ($ENV{'browser.unicode'}) {	if ($target eq 'web' \|\| $target eq 'edit' \|\| $target eq 'webgrade' ) {
&tth::ttmoptions('-L -u1');	$currentstring = &Apache::lonxml::xmlbegin();
} else {
&tth::ttmoptions('-L -u0');
}
} else {
&tth::tthinit();
if ($ENV{'browser.unicode'}) {
&tth::tthoptions('-L -u1');
} else {
&tth::tthoptions('-L -u0');
}
}
if ($target eq 'web') {
$currentstring = &Apache::lonxml::xmlbegin().
&Apache::lonxml::fontsettings();
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
@Apache::londefdef::table = ();
$currentstring .= '\documentclass[letterpaper]{article}';	$currentstring .= '\documentclass[letterpaper]{article}';
if ($ENV{'form.latex_type'}=~'batchmode') {$currentstring .='\batchmode';}	if (($env{'form.latex_type'}=~'batchmode') \|\|
$currentstring .= '\newcommand{\keephidden}[1]{}	(!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
\renewcommand{\deg}{$^{\circ}$}	$currentstring .= '\newcommand{\keephidden}[1]{}'.
\usepackage{longtable}	'\renewcommand{\deg}{$^{\circ}$}'.
\usepackage{textcomp}	'\usepackage{longtable}'.
\usepackage[dvips]{graphicx}	'\usepackage{textcomp}'.
\usepackage{epsfig}\usepackage{calc}	'\usepackage{makeidx}'.
\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}}';	'\usepackage[dvips]{graphicx}'.
	'\usepackage{picins}'.
	'\usepackage{epsfig}'.
	'\usepackage{calc}'.
	'\usepackage{amsmath}'.
	'\usepackage{amssymb}'.
	'\usepackage{amsfonts}'.
	'\usepackage{amsthm}'.
	'\usepackage{amscd}'.
	'\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}}'.
	'\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}}';
}	}
return $currentstring;	return $currentstring;
}	}

sub end_html {	sub end_html {
my ($target,$token) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = &Apache::lonxml::xmlend();	$currentstring = '</html>';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <head> tag	#-- <head> tag (end tag optional)
sub start_head {	sub start_head {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4].&Apache::lonxml::fontsettings();
}	}
return $currentstring;	return $currentstring;
}	}
Line 191 sub start_head {	Line 202 sub start_head {
sub end_head {	sub end_head {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web' && $env{'request.state'} eq 'published') {
$currentstring = &Apache::lonmenu::registerurl(undef,$target).	$currentstring = &Apache::lonmenu::registerurl(undef,$target).
$token->[2];	$token->[2];
}	}
return $currentstring;	return $currentstring;
}	}

#-- <map> tag	#-- <map> tag (end tag required)
sub start_map {	sub start_map {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 217 sub end_map {	Line 228 sub end_map {
return $currentstring;	return $currentstring;
}	}

#-- <select> tag	#-- <select> tag (end tag required)
sub start_select {	sub start_select {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
}	} elsif ($target eq 'tex') {
	$Apache::londefdef::select=0;
	}
return $currentstring;	return $currentstring;
}	}

Line 236 sub end_select {	Line 249 sub end_select {
return $currentstring;	return $currentstring;
}	}

#-- <option> tag	#-- <option> tag (end tag optional)
sub start_option {	sub start_option {
my ($target,$token) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
}	} elsif ($target eq 'tex') {
	$Apache::londefdef::select++;
	if ($Apache::londefdef::select == 1) {
	$currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
	} else {
	$currentstring='\keephidden{';
	}
	}
return $currentstring;	return $currentstring;
}	}

Line 251 sub end_option {	Line 271 sub end_option {
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
}	} elsif ($target eq 'tex') {
	$currentstring='}';
	}
return $currentstring;	return $currentstring;
}	}

#-- <input> tag	#-- <input> tag (end tag forbidden)
sub start_input {	sub start_input {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 274 sub end_input {	Line 296 sub end_input {
return $currentstring;	return $currentstring;
}	}

#-- <textarea> tag	#-- <textarea> tag (end tag required)
sub start_textarea {	sub start_textarea {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 293 sub end_textarea {	Line 315 sub end_textarea {
return $currentstring;	return $currentstring;
}	}

#-- <form> tag	#-- <form> tag (end tag required)
sub start_form {	sub start_form {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 312 sub end_form {	Line 334 sub end_form {
return $currentstring;	return $currentstring;
}	}

#-- <title> tag	#-- <title> tag (end tag required)
sub start_title {	sub start_title {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= '\keephidden{'	$currentstring .= '\keephidden{Title of the document: '
}	}
if ($target eq 'meta') {	if ($target eq 'meta') {
$currentstring='<title>';	$currentstring='<title>';
&start_output();	&start_output($target);
}	}
return $currentstring;	return $currentstring;
}	}
Line 337 sub end_title {	Line 359 sub end_title {
$currentstring .= '}';	$currentstring .= '}';
}	}
if ($target eq 'meta') {	if ($target eq 'meta') {
&end_output();	&end_output($target);
$currentstring='</title>';	$currentstring='</title>';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <meta> tag	#-- <meta> tag (end tag forbidden)
sub start_meta {	sub start_meta {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
Line 378 sub start_meta {	Line 400 sub start_meta {
my $display=&Apache::lonxml::get_param	my $display=&Apache::lonxml::get_param
('display',$parstack,$safeeval,undef,1);	('display',$parstack,$safeeval,undef,1);
if ($display) {	if ($display) {
$display=&HTML::Entities::encode($display);	$display=&HTML::Entities::encode($display,'<>&"');
$currentstring.='<'.$name.'.display>'.$display.	$currentstring.='<'.$name.'.display>'.$display.
'</'.$name.'.display>';	'</'.$name.'.display>';
}	}
Line 394 sub start_meta {	Line 416 sub start_meta {
}	}

sub end_meta {	sub end_meta {
my ($target,$token,$tagstack,$parstack,$parser) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
my $args='';	my $args='';
Line 403 sub end_meta {	Line 425 sub end_meta {
$currentstring = $token->[4];	$currentstring = $token->[4];
}	}
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring=&Apache::lonxml::endredirection();	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
$currentstring='';	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
	if ((not defined $content) && (not defined $name)) {
	&Apache::lonxml::endredirection();
	}
}	}
return $currentstring;	return $currentstring;
}	}
Line 454 sub end_accessrule {	Line 479 sub end_accessrule {
return $currentstring;	return $currentstring;
}	}

#-- <body> tag	#-- <body> tag (end tag required)
sub start_body {	sub start_body {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';

if ($target eq 'web') {	if ($target eq 'web') {
if (!$Apache::lonxml::registered) {	if ($Apache::lonhomework::parsing_a_problem) {
	&Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
	return '';
	}
	if (!$Apache::lonxml::registered &&
	$env{'request.state'} eq 'published') {
$currentstring.='<head>'.	$currentstring.='<head>'.
&Apache::lonmenu::registerurl(undef,$target).'</head>';	&Apache::lonmenu::registerurl(undef,$target).'</head>';
}	}
# Accessibility	# Accessibility
if ($ENV{'browser.imagesuppress'} eq 'on') {	if ($env{'browser.imagesuppress'} eq 'on') {
delete($token->[2]->{'background'});	delete($token->[2]->{'background'});
}	}
if ($ENV{'browser.fontenhance'} eq 'on') {	if ($env{'browser.fontenhance'} eq 'on') {
my $style='';	my $style='';
foreach my $key (keys(%{$token->[2]})) {	foreach my $key (keys(%{$token->[2]})) {
if ($key =~ /^style$/i) {	if ($key =~ /^style$/i) {
Line 477 sub start_body {	Line 508 sub start_body {
}	}
$token->[2]->{'style'}=$style.'; font-size: x-large;';	$token->[2]->{'style'}=$style.'; font-size: x-large;';
}	}
if ($ENV{'browser.blackwhite'} eq 'on') {	if ($env{'browser.blackwhite'} eq 'on') {
delete($token->[2]->{'font'});	delete($token->[2]->{'font'});
delete($token->[2]->{'link'});	delete($token->[2]->{'link'});
delete($token->[2]->{'alink'});	delete($token->[2]->{'alink'});
Line 509 sub start_body {	Line 540 sub start_body {
$currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';	$currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
}	}
$currentstring.='>';	$currentstring.='>';
if ($ENV{'request.state'} ne 'published') {	if ($env{'request.state'} ne 'published') {
	if ($env{'environment.remote'} eq 'off') {
	$currentstring.=
	&Apache::lonmenu::constspaceform().
	&Apache::lonmenu::menubuttons(1,'web',1);
	}
$currentstring.=(<<EDITBUTTON);	$currentstring.=(<<EDITBUTTON);
<form method="post">	<form method="post">
<input type="submit" name="editmode" value="Edit" />	<input type="submit" name="editmode" accesskey="e" value="Edit" />
</form>	</form>
EDITBUTTON	EDITBUTTON
} else {	} else {
$currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);	$currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
}	}
	$currentstring.=&Apache::lonxml::message_location();
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '\begin{document}';	$currentstring = '\begin{document}';
}	}
Line 525 EDITBUTTON	Line 562 EDITBUTTON
}	}

sub end_body {	sub end_body {
my ($target,$token) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off unclosed <p>
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring .= &Apache::lonxml::xmlend($target,$parser);
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '\end{document}';	$currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <center> tag	#-- <center> tag (end tag required)
sub start_center {	sub start_center {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off any prior para.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '\begin{center}';	$currentstring .= '\begin{center}';
}	}
return $currentstring;	return $currentstring;
}	}
Line 558 sub end_center {	Line 595 sub end_center {
return $currentstring;	return $currentstring;
}	}

#-- <b> tag	#-- <b> tag (end tag required)
sub start_b {	sub start_b {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 581 sub end_b {	Line 618 sub end_b {
return $currentstring;	return $currentstring;
}	}

#-- <strong> tag	#-- <strong> tag (end tag required)
sub start_strong {	sub start_strong {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 596 sub start_strong {	Line 633 sub start_strong {
sub end_strong {	sub end_strong {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {

$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '}';	$currentstring = '}';
Line 605 sub end_strong {	Line 641 sub end_strong {
return $currentstring;	return $currentstring;
}	}

#-- <h1> tag	#-- <h1> tag (end tag required)
sub start_h1 {	sub start_h1 {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off any prior para.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $pre;	my $pre;
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$pre='\begin{center}';	$pre='\begin{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$pre='\rlap{';	$pre='\rlap{';
Line 623 sub start_h1 {	Line 659 sub start_h1 {
}	}
my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
if (not defined $TeXsize) {$TeXsize="large";}	if (not defined $TeXsize) {$TeXsize="large";}
$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{';	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
} elsif ($target eq 'meta') {	} elsif ($target eq 'meta') {
$currentstring='<subject>';	$currentstring.='<subject>';
&start_output();	&start_output($target);
}	}
return $currentstring;	return $currentstring;
}	}
Line 637 sub end_h1 {	Line 673 sub end_h1 {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $post;	my $post='\vskip 0 mm ';
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$post='\end{center}';	$post='\end{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$post='} \hfill'.'\vskip 0 mm ';	$post='} \hfill'.'\vskip 0 mm ';
Line 648 sub end_h1 {	Line 684 sub end_h1 {
}	}
$currentstring .= '}}'.$post;	$currentstring .= '}}'.$post;
} elsif ($target eq 'meta') {	} elsif ($target eq 'meta') {
&end_output();	&end_output($target);
$currentstring='</subject>';	$currentstring='</subject>';
}	}
return $currentstring;	return $currentstring;
Line 657 sub end_h1 {	Line 693 sub end_h1 {
#-- <h2> tag	#-- <h2> tag
sub start_h2 {	sub start_h2 {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off any prior para.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $pre;	my $pre;
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$pre='\begin{center}';	$pre='\begin{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$pre='\rlap{';	$pre='\rlap{';
Line 672 sub start_h2 {	Line 708 sub start_h2 {
}	}
my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
if (not defined $TeXsize) {$TeXsize="large";}	if (not defined $TeXsize) {$TeXsize="large";}
$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{';	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 683 sub end_h2 {	Line 719 sub end_h2 {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $post;	my $post='\vskip 0 mm ';
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$post='\end{center}';	$post='\end{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$post='} \hfill'.'\vskip 0 mm ';	$post='} \hfill'.'\vskip 0 mm ';
Line 700 sub end_h2 {	Line 736 sub end_h2 {
#-- <h3> tag	#-- <h3> tag
sub start_h3 {	sub start_h3 {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off any prior para.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $pre;	my $pre;
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$pre='\begin{center}';	$pre='\begin{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$pre='\rlap{';	$pre='\rlap{';
Line 715 sub start_h3 {	Line 751 sub start_h3 {
}	}
my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
if (not defined $TeXsize) {$TeXsize="large";}	if (not defined $TeXsize) {$TeXsize="large";}
$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{';	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 726 sub end_h3 {	Line 762 sub end_h3 {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $post;	my $post='\vskip 0 mm ';
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$post='\end{center}';	$post='\end{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$post='} \hfill'.'\vskip 0 mm ';	$post='} \hfill'.'\vskip 0 mm ';
Line 743 sub end_h3 {	Line 779 sub end_h3 {
#-- <h4> tag	#-- <h4> tag
sub start_h4 {	sub start_h4 {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off any prior para.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $pre;	my $pre;
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$pre='\begin{center}';	$pre='\begin{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$pre='\rlap{';	$pre='\rlap{';
Line 758 sub start_h4 {	Line 794 sub start_h4 {
}	}
my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
if (not defined $TeXsize) {$TeXsize="large";}	if (not defined $TeXsize) {$TeXsize="large";}
$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{';	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 769 sub end_h4 {	Line 805 sub end_h4 {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $post;	my $post='\vskip 0 mm ';
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$post='\end{center}';	$post='\end{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$post='} \hfill'.'\vskip 0 mm ';	$post='} \hfill'.'\vskip 0 mm ';
Line 786 sub end_h4 {	Line 822 sub end_h4 {
#-- <h5> tag	#-- <h5> tag
sub start_h5 {	sub start_h5 {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off any prior paras.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $pre;	my $pre;
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$pre='\begin{center}';	$pre='\begin{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$pre='\rlap{';	$pre='\rlap{';
Line 801 sub start_h5 {	Line 837 sub start_h5 {
}	}
my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
if (not defined $TeXsize) {$TeXsize="large";}	if (not defined $TeXsize) {$TeXsize="large";}
$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{';	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 812 sub end_h5 {	Line 848 sub end_h5 {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $post;	my $post='\vskip 0 mm ';
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$post='\end{center}';	$post='\end{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$post='} \hfill'.'\vskip 0 mm ';	$post='} \hfill'.'\vskip 0 mm ';
Line 829 sub end_h5 {	Line 865 sub end_h5 {
#-- <h6> tag	#-- <h6> tag
sub start_h6 {	sub start_h6 {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off any prior paras.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $pre;	my $pre;
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$pre='\begin{center}';	$pre='\begin{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$pre='\rlap{';	$pre='\rlap{';
Line 844 sub start_h6 {	Line 880 sub start_h6 {
}	}
my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
if (not defined $TeXsize) {$TeXsize="large";}	if (not defined $TeXsize) {$TeXsize="large";}
$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{';	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 855 sub end_h6 {	Line 891 sub end_h6 {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $post;	my $post='\vskip 0 mm ';
my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if (($align eq 'center') \|\| (not defined $align)) {	if ($align eq 'center') {
$post='\end{center}';	$post='\end{center}';
} elsif ($align eq 'left') {	} elsif ($align eq 'left') {
$post='} \hfill'.'\vskip 0 mm ';	$post='} \hfill'.'\vskip 0 mm ';
Line 869 sub end_h6 {	Line 905 sub end_h6 {
return $currentstring;	return $currentstring;
}	}

#--- <cite> tag	#--- <cite> tag (end tag required)
sub start_cite {	sub start_cite {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "\\textit{";	$currentstring .= '\textit{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 887 sub end_cite {	Line 923 sub end_cite {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "}";	$currentstring .= '}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <i> tag	#-- <i> tag (end tag required)
sub start_i {	sub start_i {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 915 sub end_i {	Line 951 sub end_i {
return $currentstring;	return $currentstring;
}	}

#-- <address> tag	#-- <address> tag (end tag required)
sub start_address {	sub start_address {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "\\textit{";	$currentstring .= '\textit{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 933 sub end_address {	Line 969 sub end_address {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "}";	$currentstring .= '}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <dfn> tag	#-- <dfn> tag (end tag required)
sub start_dfn {	sub start_dfn {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "\\textit{";	$currentstring .= '\textit{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 956 sub end_dfn {	Line 992 sub end_dfn {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "}";	$currentstring .= '}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <tt> tag	#-- <tt> tag (end tag required)
sub start_tt {	sub start_tt {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 984 sub end_tt {	Line 1020 sub end_tt {
return $currentstring;	return $currentstring;
}	}

#-- <kbd> tag	#-- <kbd> tag (end tag required)
sub start_kbd {	sub start_kbd {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "\\texttt";	$currentstring .= '\texttt{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 1002 sub end_kbd {	Line 1038 sub end_kbd {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "}";	$currentstring .= '}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <code> tag	#-- <code> tag (end tag required)
sub start_code {	sub start_code {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1030 sub end_code {	Line 1066 sub end_code {
return $currentstring;	return $currentstring;
}	}

#-- <em> tag	#-- <em> tag (end tag required)
sub start_em {	sub start_em {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1053 sub end_em {	Line 1089 sub end_em {
return $currentstring;	return $currentstring;
}	}

#-- <q> tag	#-- <q> tag (end tag required)
sub start_q {	sub start_q {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "\\emph{";	$currentstring .= '\emph{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 1071 sub end_q {	Line 1107 sub end_q {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "}";	$currentstring .= '}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <p> tag	# <p> is a bit strange since it does not require a closing </p>
	# However in latex, we must often output closing stuff to end
	# environments and {}'s etc. Therefore we do all the work
	# of figuring out the ending strings in the start tag processing,
	# and provide a mechanism to output the stop text external
	# to tag processing.
	#
	{

	my $closing_string = ''; # String required to close <p>

	#-- <p> tag (end tag optional)
	#optional attribute - align="center\|left\|right"
sub start_p {	sub start_p {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # close off prior para if in progress.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
	$closing_string = '</p>'; # Not sure this is correct.
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $signal=1;	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
foreach my $tag (@$tagstack) {if (lc($tag) eq 'b') {$signal=0;}}	if ($align eq 'center') {
if ($signal) {$currentstring .= '\par ';}	$currentstring .='\begin{center}\par';
}	$closing_string = '\end{center}';
return $currentstring;	} elsif ($align eq 'right') {
}	$currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
	$closing_string= '}}';
	} elsif ($align eq 'left') {
	$currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
	$closing_string = '}\hfill}';
	} else {
	$currentstring.='\par ';
	$closing_string = '\strut\\\\\strut';
	}
	my $signal=1;#<p> does not work inside <b>...</b>
	foreach my $tag (@$tagstack) {
	if (lc($tag) eq 'b') {
	$signal=0;
	}
	}
	if (!$signal) {
	$currentstring = &end_p; # Just close the prior? Not sure this is correct
	$closing_string = ''; # Probably correct?
	}

sub end_p {
my ($target,$token) = @_;
my $currentstring = '';
if ($target eq 'web') {
$currentstring .= $token->[2];
}	}
return $currentstring;	return $currentstring;
}	}
	#
	# End paragraph processing just requires that we output the
	# closing string that was saved and blank it.
	sub end_p {
	my $current_string = $closing_string;
	$closing_string = ''; # Not in a para anymore.
	return $current_string;

#-- <br> tag	}
	}
	#-- <br> tag (end tag forbidden)
sub start_br {	sub start_br {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
if ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {	my @tempo=@$tagstack;
$currentstring .= '\vskip 0.2 mm ';	my $signal=0;
	for (my $i=$#tempo;$i>=0;$i--) {
	if (($tempo[$i] eq 'b') \|\| ($tempo[$i] eq 'strong') \|\|
	($tempo[$i] eq 'ol') \|\| ($tempo[$i] eq 'ul') \|\|
	($tempo[$i] eq 'td') \|\| ($tempo[$i] eq 'th')) {
	$signal=1;
	last;
	}
	}
	if ($signal) {
	$currentstring .= ' \vskip 0 mm ';
	} elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
	$currentstring .= '\strut \\\\ \strut ';
}	}
}	}
return $currentstring;	return $currentstring;
Line 1122 sub end_br {	Line 1205 sub end_br {
return $currentstring;	return $currentstring;
}	}

#-- <big> tag	#-- <big> tag (end tag required)
sub start_big {	sub start_big {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1145 sub end_big {	Line 1228 sub end_big {
return $currentstring;	return $currentstring;
}	}

#-- <small> tag	#-- <small> tag (end tag required)
sub start_small {	sub start_small {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1168 sub end_small {	Line 1251 sub end_small {
return $currentstring;	return $currentstring;
}	}

#-- <basefont> tag	#-- <basefont> tag (end tag forbidden)
sub start_basefont {	sub start_basefont {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $currentstring = '';	my $currentstring = '';
Line 1197 sub end_basefont {	Line 1280 sub end_basefont {
return $currentstring;	return $currentstring;
}	}

#-- <font> tag	#-- <font> tag (end tag required)
sub start_font {	sub start_font {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
if ($face=~/symbol/i) {	if ($face!~/symbol/i) {
$Apache::lonxml::prevent_entity_encode++;	if (($env{'browser.fontenhance'} eq 'on') \|\|
} else {	($env{'browser.blackwhite'} eq 'on')) { return ''; }
if (($ENV{'browser.fontenhance'} eq 'on') \|\|
($ENV{'browser.blackwhite'} eq 'on')) { return ''; }
}	}
$currentstring = $token->[4];	$currentstring = $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
Line 1223 sub end_font {	Line 1304 sub end_font {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
if ($face=~/symbol/i) {$Apache::lonxml::prevent_entity_encode--;}
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
Line 1235 sub end_font {	Line 1314 sub end_font {
return $currentstring;	return $currentstring;
}	}

#-- <strike> tag	#-- <strike> tag (end tag required)
sub start_strike {	sub start_strike {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1261 sub end_strike {	Line 1340 sub end_strike {
return $currentstring;	return $currentstring;
}	}

#-- <s> tag	#-- <s> tag (end tag required)
sub start_s {	sub start_s {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1287 sub end_s {	Line 1366 sub end_s {
return $currentstring;	return $currentstring;
}	}

#-- <sub> tag	#-- <sub> tag (end tag required)
sub start_sub {	sub start_sub {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "\$_{ ";	$currentstring .= '\ensuremath{_{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 1305 sub end_sub {	Line 1384 sub end_sub {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= " }\$";	$currentstring .= '}}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <sup> tag	#-- <sup> tag (end tag required)
sub start_sup {	sub start_sup {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= "\$^{ ";	$currentstring .= '\ensuremath{^{';
}	}
return $currentstring;	return $currentstring;
}	}
Line 1328 sub end_sup {	Line 1407 sub end_sup {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring .= " }\$";	$currentstring .= '}}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <hr> tag	#-- <hr> tag (end tag forbidden)
sub start_hr {	sub start_hr {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # End enclosing para.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
Line 1373 sub end_hr {	Line 1452 sub end_hr {
return $currentstring;	return $currentstring;
}	}

#-- <div> tag	#-- <div> tag (end tag required)
sub start_div {	sub start_div {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close enclosing para.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	$currentstring .= $token->[4];
}	}
Line 1392 sub end_div {	Line 1471 sub end_div {
return $currentstring;	return $currentstring;
}	}

#-- <a> tag	#-- <a> tag (end tag required)
sub start_a {	sub start_a {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[4];	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
	undef,1);
	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);	my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
$a=~s/([^\\])%/$1\\\%/g;	my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
$currentstring .= '\ref{'.$a.'}';	if ($a=~/\S/) {
	$a=~s/([^\\])%/$1\\\%/g;
	$currentstring .= '\ref{URI: '.$a.'}';
	} elsif ($b=~/\S/) {
	$currentstring .= '\ref{Anchor: '.$b.'}';
	} else {
	$currentstring.='';
	}
}	}
return $currentstring;	return $currentstring;
}	}

sub end_a {	sub end_a {
my ($target,$token,$tagstack,$parstack,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring .= $token->[2];	$currentstring .= $token->[2];
Line 1415 sub end_a {	Line 1503 sub end_a {
return $currentstring;	return $currentstring;
}	}

#-- <li> tag	#-- <li> tag (end tag optional)
sub start_li {	sub start_li {
my ($target,$token,$tagstack,$parstack,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,1);	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
if ($type=~/circle/) {	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
$currentstring .= ' \item[o] ';	#FIXME need to support types i and I
	if ($type=~/disc/) {
	$currentstring .= ' \item[$\bullet$] ';
	} elsif ($type=~/circle/) {
	$currentstring .= ' \item[$\circ$] ';
} elsif ($type=~/square/) {	} elsif ($type=~/square/) {
$currentstring .= ' \item[$\Box$] ';	$currentstring .= ' \item[$\diamond$] ';
} elsif ($type ne '') {	} elsif ($type eq '1') {
$currentstring .= ' \item['.$type.'] ';	$currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
	} elsif ($type eq 'A') {
	$currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
	} elsif ($type eq 'a') {
	$currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
	} elsif ($value ne '') {
	$currentstring .= ' \item['.$value.'] ';
} else {	} else {
$currentstring .= ' \item ';	$currentstring .= ' \item ';
}	}
}	$Apache::londefdef::list_index++;
	}
return $currentstring;	return $currentstring;
}	}

sub end_li {	sub end_li {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = &end_p; # In case there's a <p> in the <li>
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring .= $token->[2];
}	}
return $currentstring;	return $currentstring;
}	}

#-- <u> tag	#-- <u> tag (end tag required)
sub start_u {	sub start_u {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1471 sub end_u {	Line 1570 sub end_u {
return $currentstring;	return $currentstring;
}	}

#-- <ul> tag	#-- <ul> tag (end tag required)
sub start_ul {	sub start_ul {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off enclosing list.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
	$Apache::londefdef::list_index=0;
if ($TeXtype eq 'disc') {	if ($TeXtype eq 'disc') {
$currentstring .= ' \renewcommand{\labelitemi}{$\bullet$}	$currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
\renewcommand{\labelitemii}{$\bullet$}	'\renewcommand{\labelitemii}{$\bullet$}'.
\renewcommand{\labelitemiii}{$\bullet$}	'\renewcommand{\labelitemiii}{$\bullet$}'.
\renewcommand{\labelitemiv}{$\bullet$}';	'\renewcommand{\labelitemiv}{$\bullet$}';
} elsif ($TeXtype eq 'circle') {	} elsif ($TeXtype eq 'circle') {
$currentstring .= ' \renewcommand{\labelitemi}{$\circ$}	$currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
\renewcommand{\labelitemii}{$\circ$}	'\renewcommand{\labelitemii}{$\circ$}'.
\renewcommand{\labelitemiii}{$\circ$}	'\renewcommand{\labelitemiii}{$\circ$}'.
\renewcommand{\labelitemiv}{$\circ$}';	'\renewcommand{\labelitemiv}{$\circ$}';
} elsif ($TeXtype eq 'square') {	} elsif ($TeXtype eq 'square') {
$currentstring .= ' \renewcommand{\labelitemi}{$\diamond$}	$currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
\renewcommand{\labelitemii}{$\diamond$}	'\renewcommand{\labelitemii}{$\diamond$}'.
\renewcommand{\labelitemiii}{$\diamond$}	'\renewcommand{\labelitemiii}{$\diamond$}'.
\renewcommand{\labelitemiv}{$\diamond$}';	'\renewcommand{\labelitemiv}{$\diamond$}';
}	}
$currentstring .= '\begin{itemize}';	$currentstring .= '\strut \begin{itemize}';
}	}
return $currentstring;	return $currentstring;
}	}
Line 1506 sub end_ul {	Line 1606 sub end_ul {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
\renewcommand{\labelitemii}{$\bullet$}	'\renewcommand{\labelitemii}{$\bullet$}'.
\renewcommand{\labelitemiii}{$\bullet$}	'\renewcommand{\labelitemiii}{$\bullet$}'.
\renewcommand{\labelitemiv}{$\bullet$}';	'\renewcommand{\labelitemiv}{$\bullet$}\strut ';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <menu> tag	#-- <menu> tag (end tag required)
sub start_menu {	sub start_menu {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1537 sub end_menu {	Line 1637 sub end_menu {
return $currentstring;	return $currentstring;
}	}

#-- <dir> tag	#-- <dir> tag (end tag required)
sub start_dir {	sub start_dir {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = &end_p; # In case there's a <p> prior to the list.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = " \\begin{itemize} ";	$currentstring .= " \\begin{itemize} ";
}	}
return $currentstring;	return $currentstring;
}	}
Line 1560 sub end_dir {	Line 1660 sub end_dir {
return $currentstring;	return $currentstring;
}	}

#-- <ol> tag	#-- <ol> tag (end tag required)
sub start_ol {	sub start_ol {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # In case there's a <p> prior to the list.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
	$Apache::londefdef::list_index=0;
my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
if ($type eq '1') {	if ($type eq '1') {
$currentstring .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}	$currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
\renewcommand{\labelenumii}{\arabic{enumii}.}	'\renewcommand{\labelenumii}{\arabic{enumii}.}'.
\renewcommand{\labelenumiii}{\arabic{enumiii}.}	'\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
\renewcommand{\labelenumiv}{\arabic{enumiv}.}';	'\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
} elsif ($type eq 'A') {	} elsif ($type eq 'A') {
$currentstring .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}	$currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
\renewcommand{\labelenumii}{\Alph{enumii}.}	'\renewcommand{\labelenumii}{\Alph{enumii}.}'.
\renewcommand{\labelenumiii}{\Alph{enumiii}.}	'\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
\renewcommand{\labelenumiv}{\Alph{enumiv}.}';	'\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
} elsif ($type eq 'a') {	} elsif ($type eq 'a') {
$currentstring .= ' \renewcommand{\labelenumi}{\alph{enumi}.}	$currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
\renewcommand{\labelenumii}{\alph{enumii}.}	'\renewcommand{\labelenumii}{\alph{enumii}.}'.
\renewcommand{\labelenumiii}{\alph{enumiii}.}	'\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
\renewcommand{\labelenumiv}{\alph{enumiv}.} ';	'\renewcommand{\labelenumiv}{\alph{enumiv}.}';
} elsif ($type eq 'i') {	} elsif ($type eq 'i') {
$currentstring .= ' \renewcommand{\labelenumi}{\roman{enumi}.}	$currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
\renewcommand{\labelenumii}{\roman{enumii}.}	'\renewcommand{\labelenumii}{\roman{enumii}.}'.
\renewcommand{\labelenumiii}{\roman{enumiii}.}	'\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
\renewcommand{\labelenumiv}{\roman{enumiv}.} ';	'\renewcommand{\labelenumiv}{\roman{enumiv}.}';
} elsif ($type eq 'I') {	} elsif ($type eq 'I') {
$currentstring .= ' \renewcommand{\labelenumi}{\Roman{enumi}.}	$currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
\renewcommand{\labelenumii}{\Roman{enumii}.}	'\renewcommand{\labelenumii}{\Roman{enumii}.}'.
\renewcommand{\labelenumiii}{\Roman{enumiii}.}	'\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
\renewcommand{\labelenumiv}{\Roman{enumiv}.} ';	'\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
}	}
$currentstring .= '\begin{enumerate}';	$currentstring .= '\strut \begin{enumerate}';
}	}
return $currentstring;	return $currentstring;
}	}
Line 1605 sub end_ol {	Line 1706 sub end_ol {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '\end{enumerate} \renewcommand{\labelenumi}{\arabic{enumi}.}	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
\renewcommand{\labelenumii}{\arabic{enumii}.}	'\renewcommand{\labelenumii}{\arabic{enumii}.}'.
\renewcommand{\labelenumiii}{\arabic{enumiii}.}	'\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
\renewcommand{\labelenumiv}{\arabic{enumiv}.}';	'\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <dl> tag	#-- <dl> tag (end tag required)
sub start_dl {	sub start_dl {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = &end_p; # In case there's a <p> unclosed prior to the list.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '\begin{description}';	$currentstring .= '\begin{description}';
	$Apache::londefdef::DL++;
	push(@Apache::londefdef::description,[]);
	$Apache::londefdef::DD[$Apache::londefdef::DL]=0;
	$Apache::londefdef::DT[$Apache::londefdef::DL]=0;
	$Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
}	}
return $currentstring;	return $currentstring;
}	}

sub end_dl {	sub end_dl {
my ($target,$token) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '\end{description}';	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
	foreach my $element (@{$Apache::londefdef::description[-1]}) {
	$currentstring.=' '.$element.' ';
	}
	pop(@Apache::londefdef::description);
	$currentstring.='\end{description}';
	delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
	delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
	delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
	$Apache::londefdef::DL--;
}	}
return $currentstring;	return $currentstring;
}	}

#-- <dt> tag	#-- <dt> tag (end tag optional)
sub start_dt {	sub start_dt {
my ($target,$token) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring='';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = '\item[';	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
	if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
	&Apache::lonxml::startredirection();
	$Apache::londefdef::DT[-1]++;
	$Apache::londefdef::seenDT[-1]=1;
}	}
return $currentstring;	return $currentstring;
}	}

sub end_dt {	sub end_dt {
my ($target,$token) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = ']';	if ($Apache::londefdef::DT[-1]) {
	my $data=&item_cleanup();
	push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
	$Apache::londefdef::DT[-1]--;
	}
}	}
return $currentstring;	return $currentstring;
}	}

#-- <dd> tag	sub item_cleanup {
	my $item=&Apache::lonxml::endredirection();
	$item=~s/\\begin{center}//g;
	$item=~s/\\end{center}//g;
	return $item;
	}

	#-- <dd> tag (end tag optional)
sub start_dd {	sub start_dd {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
if ($$tagstack[-2] eq 'dl') {	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
$currentstring = ' \item [] ';	if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
} elsif ($$tagstack[-2] eq 'dt') {	if (!$Apache::londefdef::seenDT[-1]) {
$currentstring = ']';	push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
}	}
	push(@{$Apache::londefdef::description[-1]},'');
	$Apache::londefdef::description[-1]->[-1].=' \strut ';
	$Apache::londefdef::DD[-1]++;
	&Apache::lonxml::startredirection();
}	}
return $currentstring;	return $currentstring;
}	}

sub end_dd {	sub end_dd {
my ($target,$token) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
}	} elsif ($target eq 'tex') {
	$Apache::londefdef::description[-1]->[-1].=
	&Apache::lonxml::endredirection().' \vskip 0mm ';
	$Apache::londefdef::DD[-1]--;
	}
return $currentstring;	return $currentstring;
}	}

#-- <table> tag	#-- <table> tag (end tag required)
	# <table> also ends any prior <p> that is not closed.
	# but, unless I allow <p>'s to nest, that's the
	# only way I could think of to allow <p> in
	# <tr> <th> bodies
	#
	#list of supported attributes: border,width,TeXwidth
sub start_table {	sub start_table {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $textwidth='';	my $textwidth = '';
if (not defined @Apache::londefdef::table) {	my $currentstring = &end_p;
$textwidth=&recalc($ENV{'form.textwidth'});
$textwidth=~/(\d+\.?\d*)/;
$textwidth=0.95*$1;
} else {
$textwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
}
my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $aa = {};	my $aa = {};
push @Apache::londefdef::table, $aa;	push @Apache::londefdef::table, $aa;
$Apache::londefdef::table[-1]{'row_number'} = -1;	$Apache::londefdef::table[-1]{'row_number'} = -1;
#table's width	#maximum table's width (default coincides with text line length)
	if ($#Apache::londefdef::table==0) {
	$textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
	$textwidth=~/(\d+\.?\d*)/;
	$textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
	} else {
	if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
	#the maximum width of nested table is determined by LATeX width of parent cell
	$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
	} else {
	#try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
	$textwidth=$Apache::londefdef::table[-2]{'width'};
	for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
	$textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
	}
	}
	}
my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
if (not defined $TeXwidth) {	if (not defined $TeXwidth) {
my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);	my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);
if ($htmlwidth=~/%/) {	if ($htmlwidth=~/%/) {
	$Apache::londefdef::table[-1]{'percent'}=1;
$htmlwidth=~/(\d+)/;	$htmlwidth=~/(\d+)/;
my $value=$1*$textwidth/100;	$Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;;
$Apache::londefdef::table[-1]{'width'}=$value;
} else {	} else {
$Apache::londefdef::table[-1]{'width'}=$textwidth;	$Apache::londefdef::table[-1]{'width'}=$textwidth;
}	}
} elsif ($TeXwidth=~/%/) {	} elsif ($TeXwidth=~/%/) {
	$Apache::londefdef::table[-1]{'percent'}=1;
$TeXwidth=~/(\d+)/;	$TeXwidth=~/(\d+)/;
my $value=$1*$textwidth/100;	$Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
$Apache::londefdef::table[-1]{'width'}=$value;
} else {	} else {
$Apache::londefdef::table[-1]{'width'}=$textwidth;	$Apache::londefdef::table[-1]{'forcetablewidth'}=1;
	$Apache::londefdef::table[-1]{'width'}=$TeXwidth;
}	}
#table's border	#table's border
my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval,undef,1);	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
	my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
unless (defined $border) { $border = 0; }	unless (defined $border) { $border = 0; }
if ($border) {	if ($border) {
$Apache::londefdef::table[-1]{'hinc'} = '\hline ';	$Apache::londefdef::table[-1]{'hinc'} = '\hline ';
Line 1732 sub start_table {	Line 1888 sub start_table {
$Apache::londefdef::table[-1]{'vinc'} = '&';	$Apache::londefdef::table[-1]{'vinc'} = '&';
$Apache::londefdef::table[-1]{'vvinc'} = '';	$Apache::londefdef::table[-1]{'vvinc'} = '';
}	}
$Apache::londefdef::table[-1]{'output'} = ' \noindent \begin{tabular} ';	if ($#Apache::londefdef::table==0) {
$currentstring = '\keephidden{NEW TABLE ENTRY}';	$Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
}	}
	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
	$Apache::londefdef::table[-1]{'TeXlen'}=[];
	$Apache::londefdef::table[-1]{'objectlen'}=[];
	$Apache::londefdef::table[-1]{'objectsignal'}=[];
	$Apache::londefdef::table[-1]{'maxlen'}=[];
	$Apache::londefdef::table[-1]{'minlen'}=[];
	$Apache::londefdef::table[-1]{'content'}=[];
	$Apache::londefdef::table[-1]{'align'}=[];
	$currentstring.='\keephidden{NEW TABLE ENTRY}';
	}
return $currentstring;	return $currentstring;
}	}

Line 1746 sub end_table {	Line 1912 sub end_table {
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $inmemory = '';	my $inmemory = '';
my $output = '';	my $output = '';
#construct header of the table	my $WARNING='';
my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};	#width of columns from TeXwidth attributes
for (my $in=0;$in<=$Apache::londefdef::table[-1]{'counter_columns'};$in++) {	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
$header_of_table .= $Apache::londefdef::table[-1]{'columns'}[$in].$Apache::londefdef::table[-1]{'vvinc'};	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
	if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
	$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
	}
	}
}	}
$header_of_table .= '}';	#free space and number of empty columns
#define the length of the table cells	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
#always starts with TeXwidth (if defined everything else is ignored)	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
my @length_row_final = split(/,/,$Apache::londefdef::table[-1]{'TeXlengthrow'}[0]);	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
for (my $in=1;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {	if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
my @length_row = split(/,/,$Apache::londefdef::table[-1]{'TeXlengthrow'}[$in]);	$empty_columns++;
for (my $jn=0;$jn<=$#length_row;$jn++) {	} else {
if ($length_row_final[$jn]<$length_row[$jn]) {$length_row_final[$jn]=$length_row[$jn];}	$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
}	}
}	}
#continues trying estimate the width of raw data	#boundaries for contents columns
my @length_raw_row = split(/,/,$Apache::londefdef::table[-1]{'lengthrow'}[0]);	my @min_len=();#columns can not be narrower
for (my $in=1;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {	my @max_len=();#maximum length of column
my @length_row = split(/,/,$Apache::londefdef::table[-1]{'lengthrow'}[$in]);	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
for (my $jn=0;$jn<=$#length_row;$jn++) {	my ($localmin,$localmax)=(0,0);
if ($length_raw_row[$jn]<$length_row[$jn]) {$length_raw_row[$jn]=$length_row[$jn];}	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
}	if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
}	$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
#comparing of TeXwidth and raw data width	}
my $available_length=$Apache::londefdef::table[-1]{'width'};	if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
my $needed=0;	$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
for (my $jn=0;$jn<=$#length_row_final;$jn++) {	}
if ($length_row_final[$jn]!=0) {	}
$available_length=$available_length-$length_row_final[$jn];	push @min_len, $localmin;
$needed++;	push @max_len, $localmax;
}	}
}	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
$needed=$#length_row_final-$needed+1;	my $localmin=0,;
for (my $jn=0;$jn<=$#length_row_final;$jn++) {	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
if ($length_row_final[$jn]==0) {	if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
if ($length_raw_row[$jn]<$available_length/3) {	$localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
$length_row_final[$jn]=$length_raw_row[$jn];	}
$available_length=$available_length-$length_raw_row[$jn];	}
$needed--;	if ($max_len[$jn]<$localmin) {
	$max_len[$jn]=$localmin;
	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
	}#object size is bigger
	if ($min_len[$jn]<$localmin) {
	$min_len[$jn]=$localmin;
	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
	}#object size is bigger
	if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
	$min_len[$jn]=0;
	$max_len[$jn]=0;
	}
	}
	#final adjustment of column width
	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
	my @adjust=();
	#step 1. adjustment by maximum value
	my $space_neeeded=0;
	for (my $jn=0;$jn<=$#max_len;$jn++) {
	$space_neeeded=$space_neeeded+$max_len[$jn];
	}
	if ($space_neeeded<=$available_space) {
	for (my $jn=0;$jn<=$#max_len;$jn++) {
	if ($fwidth[$jn]==0) {
	$fwidth[$jn]=$max_len[$jn];
	}
	}
	} else {
	#step 2. adjustment by minimum value (estimation)
	$space_neeeded=0;
	for (my $jn=0;$jn<=$#min_len;$jn++) {
	$space_neeeded+=$min_len[$jn];
	}
	if ($space_neeeded>$available_space) {
	$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
	for (my $jn=0;$jn<=$#max_len;$jn++) {
	if ($fwidth[$jn]==0) {
	$fwidth[$jn]=$min_len[$jn];
	}
	}
	#check if we have objects which can be scaled
	my $how_many_to_scale=0;
	my @to_scale=();
	for (my $jn=0;$jn<=$#max_len;$jn++) {
	if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
	$how_many_to_scale++;
	push @to_scale, $jn;
	}
	}
	if ($how_many_to_scale>0) {
	my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
	foreach my $jn (@to_scale) {
	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
	$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)/;
	if ($1 ne '') {
	my $current_length=&recalc($1);
	$current_length=~/(\d+\.?\d*)/;
	$current_length=$current_length-$space_to_adjust;
	$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)/width=$current_length mm/;
	}
	$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d)\smm\]/;
	if ($1 ne '') {
	my $current_length=$1;
	$current_length=$current_length-$space_to_adjust;
	$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d)\smm\]/\[$current_length mm\]/;
	}
	}
	$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
	}
	}
	} else {
	#step 3. adjustment over minimal + corrections
	my $enlarge_coef=$available_space/$space_neeeded;
	my $acsessive=0;
	for (my $jn=0;$jn<=$#min_len;$jn++) {
	$adjust[$jn]=$min_len[$jn]*$enlarge_coef;
	if ($adjust[$jn]>$max_len[$jn]) {
	$fwidth[$jn]=$max_len[$jn];
	$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
	$adjust[$jn]=0;
	}
	}
	if ($acsessive>0) {
	#we have an excess of space and can redistribute it
	my $notempty_columns=0;
	for (my $jn=0;$jn<=$#min_len;$jn++) {
	if ($adjust[$jn]!=0) {
	$notempty_columns++;
	}
	}
	my $per_column=$acsessive/$notempty_columns;
	for (my $jn=0;$jn<=$#min_len;$jn++) {
	if ($adjust[$jn]!=0) {
	$adjust[$jn]+=$per_column;
	$fwidth[$jn]=$adjust[$jn];
	}
	}
	} else {
	for (my $jn=0;$jn<=$#min_len;$jn++) {
	$fwidth[$jn]=$adjust[$jn];
	}
}	}
}	}
}	}
for (my $jn=0;$jn<=$#length_row_final;$jn++) {	#use all available width if it is defined in % or as TeXwidth
if ($length_row_final[$jn]==0) {	if (($Apache::londefdef::table[-1]{'percent'}==1) \|\| ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
$length_row_final[$jn]=0.9*$available_length/$needed;	my $current=0;
	for (my $i=0;$i<=$#fwidth;$i++) {
	$current+=$fwidth[$i];
	}
	my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
	for (my $i=0;$i<=$#fwidth;$i++) {
	$fwidth[$i]*=$coef;
	}
	}
	#removing of empty columns if allowed
	my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
	if ($permission eq 'yes') {
	my @cleaned_table=();
	my @cleaned_header=();
	my $colind=0;
	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
	if ($fwidth[$jn]!=0) {
	#we need to copy column
	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
	$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
	$cleaned_header[$colind]=$fwidth[$jn];
	}
	$colind++;
	}
}	}
	$Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
	@fwidth=@cleaned_header;
}	}
	#construct header of the table
	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
	for (my $in=0;$in<=$#fwidth;$in++) {
	$header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
	}
	$header_of_table .= '}';
#fill the table	#fill the table
for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
for (my $jn=0;$jn<=$#length_row_final;$jn++) {	for (my $jn=0;$jn<=$#fwidth;$jn++) {
my $substituted=$length_row_final[$jn];	if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
$Apache::londefdef::table[-1]{'rowdata'}[$in]=~s/TOBECHANGEDONNUMBER/$substituted mm/;	$output.='\vspace*{-6 mm}\begin{center}';
}	} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
$output .= $Apache::londefdef::table[-1]{'rowdata'}[$in];	$output.=' \hfill \llap{'
chop $output;	}
$output .= ' \\\\ ';	$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
	if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
	$output.='\end{center}\vspace*{-6 mm}';
	} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
	$output.='} ';
	}
	if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
	}
	$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
}	}
$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$output.$Apache::londefdef::table[-1]{'hinc'}.'\end{tabular}\vskip 0 mm ';	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
if ($#Apache::londefdef::table > 0) {	if ($#Apache::londefdef::table > 0) {
my $inmemory = $Apache::londefdef::table[-1]{'output'};	my $inmemory = $Apache::londefdef::table[-1]{'output'};
pop @Apache::londefdef::table;	pop @Apache::londefdef::table;
Line 1817 sub end_table {	Line 2126 sub end_table {
return $currentstring;	return $currentstring;
}	}

#-- <tr> tag	#-- <tr> tag (end tag optional)
sub start_tr {	sub start_tr {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
Line 1825 sub start_tr {	Line 2134 sub start_tr {
$currentstring = $token->[4];	$currentstring = $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$Apache::londefdef::table[-1]{'row_number'}++;	$Apache::londefdef::table[-1]{'row_number'}++;
my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
if ($alignchar ne '') {	if ($alignchar ne '') {
push @ {$Apache::londefdef::table[-1]{'rows'} }, $alignchar;	push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
} else {	} else {
push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';	push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
}	}
push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
$Apache::londefdef::table[-1]{'counter_columns'} = -1;	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
$Apache::londefdef::table[-1]{'TeXlength'} = '';	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
$Apache::londefdef::table[-1]{'length'} = '';	push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
	push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
	push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
	push @ {$Apache::londefdef::table[-1]{'content'}}, [];
}	}
return $currentstring;	return $currentstring;
}	}

sub end_tr {	sub end_tr {
my ($target,$token) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close any pending <p> in the row.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
push @{ $Apache::londefdef::table[-1]{'TeXlengthrow'} },$Apache::londefdef::table[-1]{'TeXlength'};	if ($Apache::londefdef::TD_redirection) {
push @{ $Apache::londefdef::table[-1]{'lengthrow'} },$Apache::londefdef::table[-1]{'length'};	&end_td_tex($parstack,$parser,$safeeval);
	}
}	}
return $currentstring;	return $currentstring;
}	}

#-- <td> tag	#-- <td> tag (end tag optional)
sub start_td {	sub start_td {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);	$Apache::londefdef::TD_redirection = 1;
if ($what_to_push eq '') {	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
$what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;
}
push @{ $Apache::londefdef::table[-1]{'columns'} }, $what_to_push;
$Apache::londefdef::table[-1]{'counter_columns'}++;
&Apache::lonxml::startredirection();
}	}
return $currentstring;	return $currentstring;
}	}

	sub tag_check {
	my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
	my @ar=@$parstack;
	for (my $i=$#ar-1;$i>=0;$i--) {
	if (lc($$tagstack[$i]) eq $good_tag) {
	&start_td_tex($parstack,$parser,$safeeval);
	last;
	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
	splice @ar, $i+1;
	&end_td_tex(\@ar,$parser,$safeeval);
	&start_td_tex($parstack,$parser,$safeeval);
	last;
	}
	}
	return '';
	}

	sub start_td_tex {
	my ($parstack,$parser,$safeeval) = @_;
	my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
	if ($alignchar eq '') {
	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
	}
	push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
	$Apache::londefdef::table[-1]{'counter_columns'}++;
	my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
	if (defined $TeXwidth) {
	my $current_length=&recalc($TeXwidth);
	$current_length=~/(\d+\.?\d*)/;
	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
	}
	&Apache::lonxml::startredirection();
	return '';
	}

	sub end_td_tex {
	my ($parstack,$parser,$safeeval) = @_;
	my $current_row = $Apache::londefdef::table[-1]{'row_number'};
	my $data=&Apache::lonxml::endredirection();
	my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
	if (defined $TeXwidth) {
	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	} else {
	if (($data=~m/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt))/) or ($data=~m/\[(\d+\.?\d)\s*mm\]/)) {
	my $garbage_data=$data;
	my $fwidth=0;
	while ($garbage_data=~m/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)/) {
	my $current_length=&recalc($1);
	$current_length=~/(\d+\.?\d*)/;
	if ($fwidth<$1) {$fwidth=$1;}
	$garbage_data=~s/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)//;
	}
	while ($garbage_data=~m/\[(\d+\.?\d)\smm\]/) {
	my $current_length=$1;
	if ($fwidth<$current_length) {$fwidth=$current_length;}
	$garbage_data=~s/\[(\d+\.?\d)\smm\]//;
	}
	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	} elsif ($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)/) {
	my $garbage_data=$data;
	my $fwidth=0;
	while ($garbage_data=~/\\parbox\{\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt))\s*\}/) {
	my $current_length=&recalc($1);
	$current_length=~/(\d+\.?\d*)/;
	if ($fwidth<$1) {$fwidth=$1;}
	$garbage_data=~s/\\parbox\{\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt))//;
	}
	while ($garbage_data=~/\\epsfxsize\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)/) {
	my $current_length=&recalc($1);
	$current_length=~/(\d+\.?\d*)/;
	if ($fwidth<$1) {$fwidth=$1;}
	$garbage_data=~s/\\epsfxsize\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)//;
	}
	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	$data=~s/\\\\\s*$//;
	} else {
	$data=~s/^\s+(\S.*)/$1/;
	$data=~s/(.*\S)\s+$/$1/;
	$data=~s/(\s)+/$1/;
	my ($current_length,$min_length)=(0,0);
	if ($data=~/\\vskip/) {
	my $newdata=$data;
	$newdata=~s/\\vskip \d\.?\d\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
	my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
	foreach my $elementdata (@newdata) {
	my $lengthnewdata=2.5*&LATEX_length($elementdata);
	if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
	my @words=split(/ /,$elementdata);
	foreach my $word (@words) {
	my $lengthword=2.5*&LATEX_length($word);
	if ($min_length<$lengthword) {$min_length=$lengthword;}
	}
	}
	} else {
	$current_length=2.5*&LATEX_length($data);
	my @words=split(/ /,$data);
	foreach my $word (@words) {
	my $lengthword=2*&LATEX_length($word);
	if ($min_length<$lengthword) {$min_length=$lengthword;}
	}
	}
	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
	}
	}
	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
	$data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
	}
	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
	return'';
	}

sub end_td {	sub end_td {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $current_row = $Apache::londefdef::table[-1]{'row_number'};	$Apache::londefdef::TD_redirection =0;
my $data=&Apache::lonxml::endredirection();	&end_td_tex($parstack,$parser,$safeeval);
my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
if (defined $TeXwidth) {
my $current_length=&recalc($TeXwidth);
$current_length=~/(\d+)/;
$Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';
$Apache::londefdef::table[-1]{'length'} .= '0,';
} else {
if ($data=~m/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)/) {
my $current_length=&recalc($1);
$current_length=~/(\d+\.?\d*)/;
$Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';
$Apache::londefdef::table[-1]{'length'} .= '0,';
} else {
$data=~s/^\s+(\S.*)/$1/;
$data=~s/(.*\S)\s+$/$1/;
my $current_length=2*length($data);
$Apache::londefdef::table[-1]{'length'} .= $current_length.',';
$Apache::londefdef::table[-1]{'TeXlength'} .= '0,';
}
}
for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
$data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
}
@{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{TOBECHANGEDONNUMBER}{'.$data.'} '.$Apache::londefdef::table[-1]{'vinc'};
}	}
return $currentstring;	return $currentstring;
}	}

#-- <th> tag	#-- <th> tag (end tag optional)
sub start_th {	sub start_th {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);	$Apache::londefdef::TD_redirection = 1;
if ($what_to_push eq '') {	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
$what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;
}
push @{ $Apache::londefdef::table[-1]{'columns'} }, $what_to_push;
$Apache::londefdef::table[-1]{'counter_columns'}++;
&Apache::lonxml::startredirection();
}	}
return $currentstring;	return $currentstring;
}	}

	sub tagg_check {
	my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
	my @ar=@$parstack;
	for (my $i=$#ar-1;$i>=0;$i--) {
	if (lc($$tagstack[$i]) eq $good_tag) {
	&start_th_tex($parstack,$parser,$safeeval);
	last;
	} elsif (lc($$tagstack[$i]) eq $bad_tag) {
	splice @ar, $i+1;
	&end_th_tex(\@ar,$parser,$safeeval);
	&start_th_tex($parstack,$parser,$safeeval);
	last;
	}
	}
	return '';
	}

	sub start_th_tex {
	my ($parstack,$parser,$safeeval) = @_;
	my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
	if ($alignchar eq '') {
	$alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
	}
	push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
	$Apache::londefdef::table[-1]{'counter_columns'}++;
	my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
	if (defined $TeXwidth) {
	my $current_length=&recalc($TeXwidth);
	$current_length=~/(\d+\.?\d*)/;
	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
	}
	&Apache::lonxml::startredirection();
	return '';
	}

	sub end_th_tex {
	my ($parstack,$parser,$safeeval) = @_;
	my $current_row = $Apache::londefdef::table[-1]{'row_number'};
	my $data=&Apache::lonxml::endredirection();
	my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
	if (defined $TeXwidth) {
	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	} else {
	if (($data=~m/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt))/) or ($data=~m/\[(\d+\.?\d)\s*mm\]/)) {
	my $garbage_data=$data;
	my $fwidth=0;
	while ($garbage_data=~m/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)/) {
	my $current_length=&recalc($1);
	$current_length=~/(\d+\.?\d*)/;
	if ($fwidth<$1) {$fwidth=$1;}
	$garbage_data=~s/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)//;
	}
	while ($garbage_data=~m/\[(\d+\.?\d)\smm\]/) {
	my $current_length=$1;
	if ($fwidth<$current_length) {$fwidth=$current_length;}
	$garbage_data=~s/\[(\d+\.?\d)\smm\]//;
	}
	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	} else {
	$data=~s/^\s+(\S.*)/$1/;
	$data=~s/(.*\S)\s+$/$1/;
	$data=~s/(\s)+/$1/;
	my ($current_length,$min_length)=(0,0);
	if ($data=~/\\vskip/) {
	my $newdata=$data;
	$newdata=~s/\\vskip \d\.?\d\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
	my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
	foreach my $elementdata (@newdata) {
	my $lengthnewdata=2.5*&LATEX_length($elementdata);
	if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
	my @words=split(/ /,$elementdata);
	foreach my $word (@words) {
	my $lengthword=2.5*&LATEX_length($word);
	if ($min_length<$lengthword) {$min_length=$lengthword;}
	}
	}
	} else {
	$current_length=2.5*&LATEX_length($data);
	my @words=split(/ /,$data);
	foreach my $word (@words) {
	my $lengthword=2*&LATEX_length($word);
	if ($min_length<$lengthword) {$min_length=$lengthword;}
	}
	}
	push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
	push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
	push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
	}
	}
	for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
	$data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
	}
	#make data bold
	$data='\textbf{'.$data.'}';
	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
	return'';
	}

sub end_th {	sub end_th {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close any open <p> in the row.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring .= $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
my $current_row = $Apache::londefdef::table[-1]{'row_number'};	$Apache::londefdef::TD_redirection =0;
my $data=&Apache::lonxml::endredirection();	&end_th_tex($parstack,$parser,$safeeval);
my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
if (defined $TeXwidth) {
my $current_length=&recalc($TeXwidth);
$current_length=~/(\d+)/;
$Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';
$Apache::londefdef::table[-1]{'length'} .= '0,';
} else {
if ($data=~m/width\s=\s(\d+\.?\d\s(mm\|cm\|in\|pc\|pt)*)/) {
my $current_length=&recalc($1);
$current_length=~/(\d+)/;
$Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';
$Apache::londefdef::table[-1]{'length'} .= '0,';
} else {
$data=~/^\s(\S.)/;
$data=$1;
$data=~/(.\S)\s$/;
$data=$1;
my $current_length=2*length($data);
$Apache::londefdef::table[-1]{'length'} .= $current_length.',';
$Apache::londefdef::table[-1]{'TeXlength'} .= '0,';
}
}
for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
$data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
}
$data='\textbf{'.$data.'}';
@{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{TOBECHANGEDONNUMBER}{'.$data.'} '.$Apache::londefdef::table[-1]{'vinc'};
}	}
return $currentstring;	return $currentstring;
}	}
#-- <img> tag
	#-- <img> tag (end tag forbidden)
	#
	# Render the <IMG> tag.
	# <IMG> has the following attributes (in addition to the
	# standard HTML ones:
	# TeXwrap - Governs how the tex target will try to wrap text around
	# horizontally aligned images.
	# TeXwidth - The width of the image when rendered for print (mm).
	# TeXheight - The height of the image when rendered for print (mm)
	# (Note there seems to also be support for this as a % of page size)
	#
sub start_img {	sub start_img {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,	my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
undef,1);	undef,1);
	if (not $src and ($target eq 'web' or $target eq 'tex')) {
	my $inside = &Apache::lonxml::get_all_text("/img",$parser);
	return '';
	}
$Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;	$Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;
my $currentstring = '';	my $currentstring = '';
my $width_param = '';
my $height_param = '';
my $scaling = .3;	my $scaling = .3;

	# Render unto browsers that which are the browser's...

if ($target eq 'web') {	if ($target eq 'web') {
if ($ENV{'browser.imagesuppress'} ne 'on') {	if ($env{'browser.imagesuppress'} ne 'on') {
$currentstring.= $token->[4];	$currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
} else {	} else {
my $alttag= &Apache::lonxml::get_param	my $alttag= &Apache::lonxml::get_param
('alt',$parstack,$safeeval,undef,1);	('alt',$parstack,$safeeval,undef,1);
Line 1983 sub start_img {	Line 2477 sub start_img {
}	}
$currentstring.='[IMAGE: '.$alttag.']';	$currentstring.='[IMAGE: '.$alttag.']';
}	}

	# and render unto TeX that which is LaTeX

} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);	#
&image_replication($src);	# The alignment will require some superstructure to be put around
	# the \includegraphics stuff. At present we can only partially
	# simulate the alignments offered by html.
	#
	#
	my $align = lc(&Apache::lonxml::get_param('align',
	$parstack,
	$safeeval,
	undef,1));
	if(!$align) {
	$align = "bottom"; # This is html's default so it's ours too.
	}
	#
	&Apache::lonxml::debug("Alignemnt = $align");
	# LaTeX's image/text wrapping is really bad since it wants to
	# make figures float.
	# The user has the optional parameter (applicable only to l/r
	# alignment to use the picins/parpic directive to get wrapped text
	# this is also imperfect.. that's why we give them a choice...
	# so they can't yell at us for our choice.
	#
	my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
	$parstack,
	$safeeval,
	undef,0);
	&Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
	if(!$latex_rendering) {
	$latex_rendering = "parbox";
	}
	&Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");

#if original gif/jpg/png file exist do following:	#if original gif/jpg/png file exist do following:
if (-e $src) {	my $origsrc=$src;
#defines the default size of image	my ($path,$file) = &get_eps_image($src);
my $image = Image::Magick->new;	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
my $current_figure = $image->Read($src);	&Apache::lonxml::debug("path = $path file = $file src = $src");
$width_param = $image->Get('width') * $scaling;;	if (-e $src) {
$height_param = $image->Get('height') * $scaling;;	&Apache::lonxml::debug("$src exists");
undef $image;	my ($height_param,$width_param)=
#do we have any specified size of the picture?	&image_size($origsrc,0.3,$parstack,$safeeval);
my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);	my $destpath = $path;
my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);	$destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,	my $destfile = $file;
undef,1);	$destfile =~ s/ /\_/g;
if ($TeXwidth ne '') {	my $size;
if ($TeXwidth=~/(\d+)\s*\%/) {	if ($width_param) { $size.='width='.$width_param.' mm,'; }
$width_param = $1*$ENV{'form.textwidth'}/100;	if ($height_param) { $size.='height='.$height_param.' mm]'; }
} else {	$size='['.$size;
$width_param = $TeXwidth;	$size=~s/,$/]/;
	$currentstring .= '\graphicspath{{'.$destpath.'}}'
	.'\includegraphics'.$size.'{'.$destfile.'} ';

	# If there's an alignment specification we need to honor it here.
	# For the horizontal alignments, we will also honor the
	# value of the latex specfication. The default is parbox,
	# and that's used for illegal values too.
	#
	# Even though we set a default alignment value, the user
	# could have given us an illegal value. In that case we
	# just use the default alignment of bottom..
	if ($align eq "top") {
	$currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
	} elsif (($align eq "center") \|\| ($align eq "middle")) { # Being kind
	my $offset = $height_param/2;
	$currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
	} elsif ($align eq "left") {
	if ($latex_rendering eq "parpic") {
	$currentstring = '\parpic[l]{'.$currentstring.'}';
	} else { # parbox rendering
	$currentstring = "\\strut\\newline\n".
	'\parbox{'.$width_param.'mm}{'.$currentstring.'}';
}	}
} elsif ($TeXheight ne '') {	} elsif ($align eq "right") {
$width_param = $TeXheight/$height_param*$width_param;	if ($latex_rendering eq "parpic") {
} elsif ($width ne '') {	$currentstring = '\parpic[r]{'.$currentstring.'}';
$width_param = $width*$scaling;	} else { # parbox rendering.
}	$currentstring = '\parbox{'.$width_param.'mm}{\begin{flushright}'
if ($width_param > $ENV{'form.textwidth'}) {$width_param =0.95*$ENV{'form.textwidth'}}	.$currentstring.'\end{flushright}} \newline'."\n";
my $file;
my $path;
if ($src =~ m!(.)/([^/])$!) {
$file = $2;
$path = $1.'/';
}
my $newsrc = $src;
$newsrc =~ s/\.(gif\|jpg\|png)$/.eps/i;
$file=~s/\.(gif\|jpg\|png)$/.eps/i;
#where can we find the picture?
if (-e $newsrc) {
#eps counterpart for image exist
if ($path) {
$currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
}
} else {
#there is no eps counterpart for image - check for ps one
$newsrc =~ s/\.eps$/\.ps/;
if (-e $newsrc) {
#ps counterpart for image exist
$file =~ s/\.eps$/\.ps/;
if ($path) {
$currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
}
} else {
#there aren't eps or ps - so create eps
my $temp_file;
my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
$temp_file = Apache::File->new('>>'.$filename);
print $temp_file "$src\n";
$currentstring .= '\vskip 1 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
}	}
	} else { # Bottom is also default.
	# $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
}	}
} else {	} else {
	&Apache::lonxml::debug("$src does not exist");
#original image file doesn't exist so check the alt attribute	#original image file doesn't exist so check the alt attribute
my $alt =	my $alt =
&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);	&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
Line 2052 sub start_img {	Line 2573 sub start_img {
$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);	$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
}	}

if ($alt) {	if ($alt) { $currentstring .= ' '.$alt.' '; }
$currentstring .= ' '.$alt.' ';	}
} else {
#<allow> tag will care about replication	# And here's where the semi-quote breaks down: allow the user
	# to edit the beast as well by rendering the problem for edit:
	} elsif ($target eq 'edit') {
	$currentstring .=&Apache::edit::tag_start($target,$token);
	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
	&Apache::edit::browse('src',undef,'alt').' '.
	&Apache::edit::search('src',undef,'alt').'<br />';
	$currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
	$currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
	$currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
	$currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
	$currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
	$currentstring .=&Apache::edit::select_arg('Alignment:','align',
	['','bottom','middle','top','left','right'],$token,5);
	$currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
	['', 'parbox', 'parpic'], $token, 2);
	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
	my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
	my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
	my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);


	$currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
	if ($width) { $currentstring.=' width="'.$width.'" '; }
	if ($height) { $currentstring.=' height="'.$height.'" '; }
	$currentstring .= ' />';
	} elsif ($target eq 'modified') {
	my ($osrc,$owidth,$oheight)=
	($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
	my $ctag=&Apache::edit::get_new_args($token,$parstack,
	$safeeval,'src','alt','align',
	'TeXwidth','TeXheight', 'TeXwrap',
	'width','height');
	my ($nsrc,$nwidth,$nheight)=
	($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
	my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
	&image_replication($loc);
	my ($iwidth,$iheight);
	if (-e $loc) {
	my $image = Image::Magick->new;
	$image->Read($loc);
	($iwidth, $iheight) = ($image->Get('width'),
	$image->Get('height'));
	}
	if ($osrc ne $nsrc \|\| (!$nwidth && !$nheight)) {
	# changed image or no size specified,
	# if they didn't explicitly change the
	# width or height use the ones from the image
	if ($iwidth && $iheight) {
	if ($owidth == $nwidth \|\| (!$nwidth && !$nheight)) {
	$token->[2]{'width'} = $iwidth;$ctag=1;
	}
	if ($oheight == $nheight \|\| (!$nwidth && !$nheight)) {
	$token->[2]{'height'}=$iheight;$ctag=1;
	}
}	}
}	}
	my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
	# if we don't have a width or height
	if ($iwidth && $cwidth && !$cheight) {
	$token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
	}
	if ($iheight && $cheight && !$cwidth) {
	$token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
	}
	if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
}	}

return $currentstring;	return $currentstring;
}	}

Line 2073 sub end_img {	Line 2659 sub end_img {
return $currentstring;	return $currentstring;
}	}

#-- <applet> tag	#-- <applet> tag (end tag required)
sub start_applet {	sub start_applet {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;

Line 2086 sub start_applet {	Line 2672 sub start_applet {

my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
if ($ENV{'browser.appletsuppress'} ne 'on') {	if ($env{'browser.appletsuppress'} ne 'on') {
$currentstring = $token->[4];	$currentstring = &Apache::lonenc::encrypt_ref($token,
	{'code'=>$code,
	'archive'=>$archive}
	);
} else {	} else {
my $alttag= &Apache::lonxml::get_param('alt',$parstack,	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
$safeeval,undef,1);	$safeeval,undef,1);
Line 2098 sub start_applet {	Line 2687 sub start_applet {
$currentstring='[APPLET: '.$alttag.']';	$currentstring='[APPLET: '.$alttag.']';
}	}
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = " \\begin{figure} ";	my $alttag= &Apache::lonxml::get_param('alt',$parstack,
	$safeeval,undef,1);
	unless ($alttag) {
	my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
	undef,1);
	$alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
	$code);
	}
	$currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
	'.}\end{center}';
}	}
return $currentstring;	return $currentstring;
}	}
Line 2109 sub end_applet {	Line 2707 sub end_applet {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = " \\end{figure}";
}	}
return $currentstring;	return $currentstring;
}	}

#-- <embed> tag	#-- <embed> tag (end tag optional/required)
sub start_embed {	sub start_embed {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
$Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;	$Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
if ($ENV{'browser.embedsuppress'} ne 'on') {	if ($env{'browser.embedsuppress'} ne 'on') {
$currentstring = $token->[4];	$currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
} else {	} else {
my $alttag=&Apache::lonxml::get_param	my $alttag=&Apache::lonxml::get_param
('alt',$parstack,$safeeval,undef,1);	('alt',$parstack,$safeeval,undef,1);
Line 2132 sub start_embed {	Line 2729 sub start_embed {
$currentstring='[EMBED: '.$alttag.']';	$currentstring='[EMBED: '.$alttag.']';
}	}
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = " \\begin{figure} ";
}	}
return $currentstring;	return $currentstring;
}	}
Line 2142 sub end_embed {	Line 2738 sub end_embed {
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = " \\end{figure}";
}	}
return $currentstring;	return $currentstring;
}	}

#-- <param> tag	#-- <param> tag (end tag forbidden)
sub start_param {	sub start_param {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
if (&Apache::lonxml::get_param	if (&Apache::lonxml::get_param
Line 2160 sub start_param {	Line 2755 sub start_param {
&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);	&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	my %toconvert;
	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
	if ($src) { $toconvert{'src'}= $src; }
	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
	undef,1);
	if ($name=~/^cabbase$/i) {
	$toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
	$safeeval,undef,1);
	}
	$currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = " \\begin{figure} ";
}	}
return $currentstring;	return $currentstring;
}	}
Line 2173 sub end_param {	Line 2776 sub end_param {
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
} elsif ($target eq 'tex') {	} elsif ($target eq 'tex') {
$currentstring = " \\end{figure}";
}	}
return $currentstring;	return $currentstring;
}	}
Line 2185 sub start_allow {	Line 2787 sub start_allow {
$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
$Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=	$Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
&Apache::lonnet::clutter($src);	&Apache::lonnet::clutter($src);
&image_replication($src);	if ($target eq 'tex') { &image_replication($src); }
my $result;	my $result;
if ($target eq 'edit') {	if ($target eq 'edit') {
$result .=&Apache::edit::tag_start($target,$token);	$result .=&Apache::edit::tag_start($target,$token);
Line 2205 sub end_allow {	Line 2807 sub end_allow {
return '';	return '';
}	}

#-- Frames	#-- Frames (end tag required)
	#-- <frameset>
sub start_frameset {	sub start_frameset {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = ''; # Close any pending para.
if ($target eq 'web') {	if ($target eq 'web') {
if (!$Apache::lonxml::registered) {	if (!$Apache::lonxml::registered &&
	$env{'request.state'} eq 'published') {
$currentstring.='<head>'.	$currentstring.='<head>'.
&Apache::lonmenu::registerurl(undef,$target).'</head>';	&Apache::lonmenu::registerurl(undef,$target).'</head>';
}	}
Line 2250 sub end_frameset {	Line 2854 sub end_frameset {
return $currentstring;	return $currentstring;
}	}

#-- <pre>	#-- <xmp> (end tag required)
sub start_pre {	sub start_xmp {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
Line 2262 sub start_pre {	Line 2866 sub start_pre {
return $currentstring;	return $currentstring;
}	}

	sub end_xmp {
	my ($target,$token) = @_;
	my $currentstring = '';
	if ($target eq 'web') {
	$currentstring .= $token->[2];
	} elsif ($target eq 'tex') {
	$currentstring .= '\end{verbatim}';
	}
	return $currentstring;
	}

	#-- <pre> (end tag required)
	sub start_pre {
	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
	my $currentstring = &end_p; # close off pending <p>
	if ($target eq 'web') {
	$currentstring .= $token->[4];
	} elsif ($target eq 'tex') {
	$currentstring .= '\begin{verbatim}';
	}
	return $currentstring;
	}

sub end_pre {	sub end_pre {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2316 sub end_externallink {	Line 2943 sub end_externallink {
#-- <blankspace heigth="">	#-- <blankspace heigth="">
sub start_blankspace {	sub start_blankspace {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
my $currentstring = '';	my $currentstring = &end_p; # closes off any unclosed <p>
if ($target eq 'tex') {	if ($target eq 'tex') {
my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
$currentstring .= '\vskip '.$howmuch.' ';	$currentstring .= '\vskip '.$howmuch.' ';
Line 2333 sub end_blankspace {	Line 2960 sub end_blankspace {
return $currentstring;	return $currentstring;
}	}

#-- <abbr> tag	#-- <abbr> tag (end tag required)
sub start_abbr {	sub start_abbr {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2352 sub end_abbr {	Line 2979 sub end_abbr {
return $currentstring;	return $currentstring;
}	}

#-- <acronym> tag	#-- <acronym> tag (end tag required)
sub start_acronym {	sub start_acronym {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2371 sub end_acronym {	Line 2998 sub end_acronym {
return $currentstring;	return $currentstring;
}	}

#-- <area> tag	#-- <area> tag (end tag forbidden)
sub start_area {	sub start_area {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2390 sub end_area {	Line 3017 sub end_area {
return $currentstring;	return $currentstring;
}	}

#-- <base> tag	#-- <base> tag (end tag forbidden)
sub start_base {	sub start_base {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
}	}
return $currentstring;	return $currentstring;
}	}

Line 2409 sub end_base {	Line 3036 sub end_base {
return $currentstring;	return $currentstring;
}	}

#-- <bdo> tag	#-- <bdo> tag (end tag required)
sub start_bdo {	sub start_bdo {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2428 sub end_bdo {	Line 3055 sub end_bdo {
return $currentstring;	return $currentstring;
}	}

#-- <bgsound> tag	#-- <bgsound> tag (end tag optional)
sub start_bgsound {	sub start_bgsound {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2447 sub end_bgsound {	Line 3074 sub end_bgsound {
return $currentstring;	return $currentstring;
}	}

#-- <blink> tag	#-- <blink> tag (end tag required)
sub start_blink {	sub start_blink {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2466 sub end_blink {	Line 3093 sub end_blink {
return $currentstring;	return $currentstring;
}	}

#-- <blockquote> tag	#-- <blockquote> tag (end tag required)
sub start_blockquote {	sub start_blockquote {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close any unclosed <p>
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
}	}
return $currentstring;	return $currentstring;
}	}
Line 2485 sub end_blockquote {	Line 3112 sub end_blockquote {
return $currentstring;	return $currentstring;
}	}

#-- <button> tag	#-- <button> tag (end tag required)
sub start_button {	sub start_button {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2504 sub end_button {	Line 3131 sub end_button {
return $currentstring;	return $currentstring;
}	}

#-- <caption> tag	#-- <caption> tag (end tag required)
sub start_caption {	sub start_caption {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2523 sub end_caption {	Line 3150 sub end_caption {
return $currentstring;	return $currentstring;
}	}

#-- <col> tag	#-- <col> tag (end tag forbdden)
sub start_col {	sub start_col {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2542 sub end_col {	Line 3169 sub end_col {
return $currentstring;	return $currentstring;
}	}

#-- <colgroup> tag	#-- <colgroup> tag (end tag optional)
sub start_colgroup {	sub start_colgroup {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2561 sub end_colgroup {	Line 3188 sub end_colgroup {
return $currentstring;	return $currentstring;
}	}

#-- <del> tag	#-- <del> tag (end tag required)
sub start_del {	sub start_del {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2580 sub end_del {	Line 3207 sub end_del {
return $currentstring;	return $currentstring;
}	}

#-- <fieldset> tag	#-- <fieldset> tag (end tag required)
sub start_fieldset {	sub start_fieldset {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2599 sub end_fieldset {	Line 3226 sub end_fieldset {
return $currentstring;	return $currentstring;
}	}

#-- <frame> tag	#-- <frame> tag (end tag forbidden)
sub start_frame {	sub start_frame {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2618 sub end_frame {	Line 3245 sub end_frame {
return $currentstring;	return $currentstring;
}	}

#-- <iframe> tag	#-- <iframe> tag (end tag required)
sub start_iframe {	sub start_iframe {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2637 sub end_iframe {	Line 3264 sub end_iframe {
return $currentstring;	return $currentstring;
}	}

#-- <ins> tag	#-- <ins> tag (end tag required)
sub start_ins {	sub start_ins {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2656 sub end_ins {	Line 3283 sub end_ins {
return $currentstring;	return $currentstring;
}	}

#-- <isindex> tag	#-- <isindex> tag (end tag forbidden)
sub start_isindex {	sub start_isindex {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2675 sub end_isindex {	Line 3302 sub end_isindex {
return $currentstring;	return $currentstring;
}	}

#-- <keygen> tag	#-- <keygen> tag (end tag forbidden)
sub start_keygen {	sub start_keygen {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2713 sub end_label {	Line 3340 sub end_label {
return $currentstring;	return $currentstring;
}	}

#-- <layer> tag	#-- <layer> tag (end tag required)
sub start_layer {	sub start_layer {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2732 sub end_layer {	Line 3359 sub end_layer {
return $currentstring;	return $currentstring;
}	}

#-- <legend> tag	#-- <legend> tag (end tag required)
sub start_legend {	sub start_legend {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2751 sub end_legend {	Line 3378 sub end_legend {
return $currentstring;	return $currentstring;
}	}

#-- <link> tag	#-- <link> tag (end tag forbidden)
sub start_link {	sub start_link {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2770 sub end_link {	Line 3397 sub end_link {
return $currentstring;	return $currentstring;
}	}

#-- <marquee> tag	#-- <marquee> tag (end tag optional)
sub start_marquee {	sub start_marquee {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2789 sub end_marquee {	Line 3416 sub end_marquee {
return $currentstring;	return $currentstring;
}	}

#-- <malticol> tag	#-- <multicol> tag (end tag required)
sub start_malticol {	sub start_multicol {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close any pending <p>
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
}	}
return $currentstring;	return $currentstring;
}	}

sub end_malticol {	sub end_multicol {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
Line 2808 sub end_malticol {	Line 3435 sub end_malticol {
return $currentstring;	return $currentstring;
}	}

#-- <nobr> tag	#-- <nobr> tag (end tag required)
sub start_nobr {	sub start_nobr {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
}	} elsif ($target eq 'tex') {
	$currentstring='\mbox{';
	}
return $currentstring;	return $currentstring;
}	}

Line 2823 sub end_nobr {	Line 3452 sub end_nobr {
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
}	} elsif ($target eq 'tex') {
	$currentstring='}';
	}
return $currentstring;	return $currentstring;
}	}

#-- <noembed> tag	#-- <noembed> tag (end tag required)
sub start_noembed {	sub start_noembed {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2846 sub end_noembed {	Line 3477 sub end_noembed {
return $currentstring;	return $currentstring;
}	}

#-- <noframes> tag	#-- <noframes> tag (end tag required)
sub start_noframes {	sub start_noframes {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2865 sub end_noframes {	Line 3496 sub end_noframes {
return $currentstring;	return $currentstring;
}	}

#-- <nolayer> tag	#-- <nolayer> tag (end tag required)
sub start_nolayer {	sub start_nolayer {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2884 sub end_nolayer {	Line 3515 sub end_nolayer {
return $currentstring;	return $currentstring;
}	}

#-- <noscript> tag	#-- <noscript> tag (end tag required)
sub start_noscript {	sub start_noscript {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2903 sub end_noscript {	Line 3534 sub end_noscript {
return $currentstring;	return $currentstring;
}	}

#-- <object> tag	#-- <object> tag (end tag required)
sub start_object {	sub start_object {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2922 sub end_object {	Line 3553 sub end_object {
return $currentstring;	return $currentstring;
}	}

#-- <optgroup> tag	#-- <optgroup> tag (end tag required)
sub start_optgroup {	sub start_optgroup {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 2941 sub end_optgroup {	Line 3572 sub end_optgroup {
return $currentstring;	return $currentstring;
}	}

#-- <samp> tag	#-- <samp> tag (end tag required)
sub start_samp {	sub start_samp {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
}	} elsif ($target eq 'tex') {
	$currentstring='\texttt{';
	}
return $currentstring;	return $currentstring;
}	}

Line 2956 sub end_samp {	Line 3589 sub end_samp {
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
}	} elsif ($target eq 'tex') {
	$currentstring='}';
	}
return $currentstring;	return $currentstring;
}	}

Line 2979 sub end_server {	Line 3614 sub end_server {
return $currentstring;	return $currentstring;
}	}

#-- <spacer> tag	#-- <spacer> tag (end tag forbidden)
sub start_spacer {	sub start_spacer {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = &end_p; # Close off any open <p> tag.
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring .= $token->[4];
}	}
return $currentstring;	return $currentstring;
}	}
Line 2998 sub end_spacer {	Line 3633 sub end_spacer {
return $currentstring;	return $currentstring;
}	}

#-- <span> tag	#-- <span> tag (end tag required)
sub start_span {	sub start_span {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 3017 sub end_span {	Line 3652 sub end_span {
return $currentstring;	return $currentstring;
}	}

#-- <tbody> tag	#-- <tbody> tag (end tag optional)
sub start_tbody {	sub start_tbody {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 3036 sub end_tbody {	Line 3671 sub end_tbody {
return $currentstring;	return $currentstring;
}	}

#-- <tfoot> tag	#-- <tfoot> tag (end tag optional)
sub start_tfoot {	sub start_tfoot {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 3055 sub end_tfoot {	Line 3690 sub end_tfoot {
return $currentstring;	return $currentstring;
}	}

#-- <thead> tag	#-- <thead> tag (end tag optional)
sub start_thead {	sub start_thead {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 3080 sub start_var {	Line 3715 sub start_var {
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[4];	$currentstring = $token->[4];
}	} elsif ($target eq 'tex') {
	$currentstring = '\textit{';
	}
return $currentstring;	return $currentstring;
}	}

Line 3088 sub end_var {	Line 3725 sub end_var {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
if ($target eq 'web') {	if ($target eq 'web') {
$currentstring = $token->[2];	$currentstring = $token->[2];
	} elsif ($target eq 'tex') {
	$currentstring = '}';
}	}
return $currentstring;	return $currentstring;
}	}

#-- <wbr> tag	#-- <wbr> tag (end tag forbidden)
sub start_wbr {	sub start_wbr {
my ($target,$token) = @_;	my ($target,$token) = @_;
my $currentstring = '';	my $currentstring = '';
Line 3112 sub end_wbr {	Line 3751 sub end_wbr {
return $currentstring;	return $currentstring;
}	}


#-- <hideweboutput> tag	#-- <hideweboutput> tag
sub start_hideweboutput {	sub start_hideweboutput {
my ($target,$token) = @_;	my ($target,$token) = @_;
Line 3134 sub end_hideweboutput {	Line 3772 sub end_hideweboutput {

sub image_replication {	sub image_replication {
my $src = shift;	my $src = shift;
if (not -e $src) {	if (not -e $src) { &Apache::lonnet::repcopy($src); }
#replicates image itself	#replicates eps or ps
&Apache::lonnet::repcopy($src);	my $epssrc = my $pssrc = $src;
#replicates eps or ps	$epssrc =~ s/\.(gif\|jpg\|jpeg\|png)$/.eps/i;
my $newsrc = $src;	$pssrc =~ s/\.(gif\|jpg\|jpeg\|png)$/.ps/i;
$newsrc =~ s/\.(gif\|jpg\|jpeg\|png)$/.eps/i;	if (not -e $epssrc && not -e $pssrc) {
if (not -e $newsrc) {	my $result=&Apache::lonnet::repcopy($epssrc);
if (&Apache::lonnet::repcopy($newsrc) ne 'OK') {	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
$newsrc =~ s/\.eps$/\.ps/;	}
&Apache::lonnet::repcopy($newsrc);	return '';
	}
	#
	# Get correct sizing parameter for an image given
	# it's initial ht. and wid. This allows sizing of
	# images that are generated on-the-fly (e.g. gnuplot)
	# as well as serving as a utility for image_size.
	#
	# Parameter:
	# height_param
	# width_param - Initial picture dimensions.
	# scaling - A scale factor.
	# parstack, - the current stack of tag attributes
	# from the xml parser
	# safeeval, - pointer to the safespace
	# depth, - from what level in the stack to look for attributes
	# (assumes -1 if unspecified)
	# cis - look for attrubutes case insensitively
	# (assumes false)
	#
	# Returns:
	# height, width - new dimensions.
	#
	sub resize_image {
	my ($height_param, $width_param, $scaling,
	$parstack, $safeeval, $depth, $cis) = @_;

	# First apply the scaling...

	$height_param = $height_param * $scaling;
	$width_param = $width_param * $scaling;

	#do we have any specified LaTeX size of the picture?
	my $toget='TeXwidth';
	if ($cis) {
	$toget=lc($toget);
	}
	my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
	$safeeval,$depth,$cis);
	$toget='TeXheight'; if ($cis) { $toget=lc($toget); }
	my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
	$safeeval,$depth,$cis);
	#do we have any specified web size of the picture?
	my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
	$depth,1);
	if ($TeXwidth) {
	my $old_width_param=$width_param;
	if ($TeXwidth=~/(\d+)\s*\%/) {
	$width_param = $1*$env{'form.textwidth'}/100;
	} else {
	$width_param = $TeXwidth;
	}
	if ($TeXheight) {
	$height_param = $TeXheight;
	} elsif ($old_width_param) {
	$height_param=$TeXwidth/$old_width_param*$height_param;
	}
	} elsif ($TeXheight) {
	$height_param = $TeXheight;
	if ($height_param) {
	$width_param = $TeXheight/$height_param*$width_param;
	}
	} elsif ($width) {
	my $old_width_param=$width_param;
	$width_param = $width*$scaling;
	if ($old_width_param) {
	$height_param=$width_param/$old_width_param*$height_param;
	}
	}
	if ($width_param > $env{'form.textwidth'}) {
	my $old_width_param=$width_param;
	$width_param =0.95*$env{'form.textwidth'};
	if ($old_width_param) {
	$height_param=$width_param/$old_width_param*$height_param;
	}
	}

	return ($height_param, $width_param);
	}

	sub image_size {
	my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;

	#size of image from gif/jpg/jpeg/png
	my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
	if (-e $ressrc) {
	$src = $ressrc;
	}
	my $image = Image::Magick->new;
	my $current_figure = $image->Read($src);
	my $width_param = $image->Get('width');
	my $height_param = $image->Get('height');
	&Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
	undef($image);

	($height_param, $width_param) = &resize_image($height_param, $width_param,
	$scaling, $parstack, $safeeval,
	$depth, $cis);

	return ($height_param, $width_param);
	}

	sub image_width {
	my ($height, $width) = &image_size(@_);
	return $width;
	}
	# Not yet 100% sure this is correct in all circumstances..
	# due to my uncertainty about mods to image_size.
	#
	sub image_height {
	my ($height, $width) = &image_size(@_);
	return $height;
	}

	sub get_eps_image {
	my ($src)=@_;
	my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
	&Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
	$src=~s/\.(gif\|png\|jpg\|jpeg)$/\.eps/i;
	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
	&Apache::lonxml::debug("Filelocation gives: $src");
	if (! -e $src) {
	&Apache::lonxml::debug("$src does not exist");
	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
	&Apache::lonxml::debug("Repcopy of $src failed (1)");
	#if replication failed try to find ps file
	$src=~s/\.eps$/\.ps/;
	&Apache::lonxml::debug("Now looking for $src");
	#if no ps file try to replicate it.
	my $didrepcopy = &Apache::lonnet::repcopy($src);
	&Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
	if ( (not -e $src) \|\|
	($didrepcopy ne 'ok')) {
	&Apache::lonxml::debug("Failed to find or replicate $src");

	#if replication failed try to produce eps file dynamically
	$src=~s/\.ps$/\.eps/;
	my $temp_file;
	open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
	my $newsrc=$orig_src;
	$newsrc =~ s\|(.*)/res/\|/home/httpd/html/res/\|;
	&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
	print FILE "$newsrc\n";
	close FILE;
	$src=~s\|/home/httpd/html/res\|/home/httpd/prtspool\|;
	$src=~s\|/home/([^/]*)/public_html/\|/home/httpd/prtspool/$1/\|;
}	}
}	}
}	}
return '';	my ($path,$file)=($src=~m\|(.)/([^/])$\|);
	&Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
	return ($path.'/',$file);
	}

	sub eps_generation {
	my ($src,$file,$width_param) = @_;
	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
	my $temp_file = Apache::File->new('>>'.$filename);
	print $temp_file "$src\n";
	my $newsrc = $src;
	$newsrc =~ s/(\.gif\|\.jpg\|\.jpeg)$/\.eps/i;
	$newsrc=~s/\/home\/httpd\/html\/res//;
	$newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
	$newsrc=~s/\/\.\//\//;
	$newsrc=~s/\/([^\/]+)\.(ps\|eps)/\//;
	if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
	$newsrc=~s/\/home\/httpd\/lonUsers//;
	$newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
	}
	if ($newsrc=~/\/userfiles\//) {
	return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
	} else {
	return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
	}
	}

	sub file_path {
	my $src=shift;
	my ($file,$path);
	if ($src =~ m!(.)/([^/])$!) {
	$file = $2;
	$path = $1.'/';
	}
	return $file,$path;
}	}

sub recalc {	sub recalc {
Line 3168 sub recalc {	Line 3985 sub recalc {
return $value.' mm';	return $value.' mm';
}	}

	sub LATEX_length {
	my $garbage=shift;
	$garbage=~s/^\s+$//;
	$garbage=~s/^\s+(\S.*)/$1/;#space before
	$garbage=~s/(.*\S)\s+$/$1/;#space after
	$garbage=~s/(\s)+/$1/;#only one space
	$garbage=~s/(\\begin{([^\}]+)}\|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
	$garbage=~s/(\$\_\{\|\$\_\|\$\^{\|\$\^\|\}\$)//g;#remove $_{,$_,$^{,$^,}$
	$garbage=~s/([^\\])\$/$1/g;#$
	$garbage=~s/(\\ensuremath\{\_\{\|\\ensuremath\{\_\|\\ensuremath\{\^{\|\\ensuremath\{\^\|\})//g;#remove \ensuremath{...}
	$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;
	$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;
	$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;
	$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;
	$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;
	$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;
	$garbage=~s/(\\hat{([^}]+)}\|\\check{([^}]+)}\|\\dot{([^}]+)}\|\\breve{([^}]+)}\|\\acute{([^}]+)}\|\\ddot{([^}]+)}\|\\grave{([^}]+)}\|\\tilde{([^}]+)}\|\\mathring{([^}]+)}\|\\bar{([^}]+)}\|\\vec{([^}]+)})/$1/g;
	#remove some other LaTeX command
	$garbage=~s\|\\(\w+)\\\|\\\|g;
	$garbage=~s\|\\(\w+)(\s*)\|$2\|g;
	$garbage=~s\|\+\|11\|g;
	my $value=length($garbage);
	return $value;
	}




1;	1;
__END__	__END__

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Removed from v.1.158
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	Added in v.1.278