--- loncom/xml/londefdef.pm	2003/10/14 00:21:12	1.180
+++ loncom/xml/londefdef.pm	2003/10/24 21:11:46	1.186
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.180 2003/10/14 00:21:12 albertel Exp $
+# $Id: londefdef.pm,v 1.186 2003/10/24 21:11:46 albertel Exp $
 # 
 #
 # Copyright Michigan State University Board of Trustees
@@ -140,7 +140,7 @@ sub end_tthoption {
     return $result;
 }
 
-#-- <html> tag    
+#-- <html> tag (end tag optional)
 sub start_html {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -159,7 +159,7 @@ sub start_html {
 	    &tth::tthoptions('-L -u0');
 	}
     }
-    if ($target eq 'web') {
+    if ($target eq 'web' || $target eq 'edit') {
 	$currentstring = &Apache::lonxml::xmlbegin().
 	    &Apache::lonxml::fontsettings();     
     } elsif ($target eq 'tex') {
@@ -188,7 +188,7 @@ sub end_html {
     return $currentstring;
 }
 
-#-- <head> tag
+#-- <head> tag (end tag optional)
 sub start_head {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -208,7 +208,7 @@ sub end_head {
     return $currentstring;
 }
 
-#-- <map> tag
+#-- <map> tag (end tag required)
 sub start_map {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -227,13 +227,15 @@ sub end_map {
     return $currentstring;
 }
 
-#-- <select> tag
+#-- <select> tag (end tag required)
 sub start_select {
     my ($target,$token) = @_;
     my $currentstring = '';
     if ($target eq 'web') {
 	$currentstring = $token->[4];     
-    } 
+    }  elsif ($target eq 'tex') {
+	$Apache::londefdef::select=0;
+    }
     return $currentstring;
 }
 
@@ -246,13 +248,20 @@ sub end_select {
     return $currentstring;
 }
 
-#-- <option> tag
+#-- <option> tag (end tag optional)
 sub start_option {
-    my ($target,$token) = @_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
     if ($target eq 'web') {
 	$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;
 }
 
@@ -261,11 +270,13 @@ sub end_option {
     my $currentstring = '';
     if ($target eq 'web') {
 	$currentstring = $token->[2];    
-    } 
+    }  elsif ($target eq 'tex') {
+	$currentstring='}';
+    }
     return $currentstring;
 }
 
-#-- <input> tag
+#-- <input> tag (end tag forbidden)
 sub start_input {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -284,7 +295,7 @@ sub end_input {
     return $currentstring;
 }
 
-#-- <textarea> tag
+#-- <textarea> tag (end tag required)
 sub start_textarea {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -303,7 +314,7 @@ sub end_textarea {
     return $currentstring;
 }
 
-#-- <form> tag
+#-- <form> tag (end tag required)
 sub start_form {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -322,7 +333,7 @@ sub end_form {
     return $currentstring;
 }
 
-#-- <title> tag
+#-- <title> tag (end tag required)
 sub start_title {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -333,7 +344,7 @@ sub start_title {
     }
     if ($target eq 'meta') {
 	$currentstring='<title>';
-	&start_output();
+	&start_output($target);
     }
     return $currentstring;
 }
@@ -347,13 +358,13 @@ sub end_title {
 	$currentstring .= '}';
     }  
     if ($target eq 'meta') {
-	&end_output();
+	&end_output($target);
 	$currentstring='</title>';
     } 
     return $currentstring;
 }
 
-#-- <meta> tag
+#-- <meta> tag (end tag forbidden)
 sub start_meta {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -467,7 +478,7 @@ sub end_accessrule {
     return $currentstring;
 }
 
-#-- <body> tag
+#-- <body> tag (end tag required)
 sub start_body {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -553,7 +564,7 @@ sub end_body {
     return $currentstring;
 }
 
-#-- <center> tag
+#-- <center> tag (end tag required)
 sub start_center {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -576,7 +587,7 @@ sub end_center {
     return $currentstring;
 }
 
-#-- <b> tag
+#-- <b> tag (end tag required)
 sub start_b {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -599,7 +610,7 @@ sub end_b {
     return $currentstring;
 }
 
-#-- <strong> tag
+#-- <strong> tag (end tag required)
 sub start_strong {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -614,8 +625,7 @@ sub start_strong {
 sub end_strong {
     my ($target,$token) = @_;
     my $currentstring = '';
-    if ($target eq 'web') {
-	
+    if ($target eq 'web') {	
 	$currentstring = $token->[2];     
     } elsif ($target eq 'tex') {
 	$currentstring = '}';  
@@ -623,7 +633,7 @@ sub end_strong {
     return $currentstring;
 }
 
-#-- <h1> tag
+#-- <h1> tag (end tag required)
 sub start_h1 {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -644,7 +654,7 @@ sub start_h1 {
 	$currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; 
     } elsif ($target eq 'meta') {
 	$currentstring='<subject>';
-	&start_output();
+	&start_output($target);
     }
     return $currentstring;
 }
@@ -666,7 +676,7 @@ sub end_h1 {
 	}
 	$currentstring .= '}}'.$post;
     } elsif ($target eq 'meta') {
-	&end_output();
+	&end_output($target);
 	$currentstring='</subject>';
     } 
     return $currentstring;
@@ -887,7 +897,7 @@ sub end_h6 {
     return $currentstring;
 }
 
-#--- <cite> tag
+#--- <cite> tag (end tag required)
 sub start_cite {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -910,7 +920,7 @@ sub end_cite {
     return $currentstring;
 }
 
-#-- <i> tag
+#-- <i> tag (end tag required)
 sub start_i {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -933,7 +943,7 @@ sub end_i {
     return $currentstring;
 }
 
-#-- <address> tag
+#-- <address> tag (end tag required)
 sub start_address {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -956,7 +966,7 @@ sub end_address {
     return $currentstring;
 }
 
-#-- <dfn> tag
+#-- <dfn> tag (end tag required)
 sub start_dfn {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -979,7 +989,7 @@ sub end_dfn {
     return $currentstring;
 }
 
-#-- <tt> tag
+#-- <tt> tag (end tag required)
 sub start_tt {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1002,7 +1012,7 @@ sub end_tt {
     return $currentstring;
 }
 
-#-- <kbd> tag
+#-- <kbd> tag (end tag required)
 sub start_kbd {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1025,7 +1035,7 @@ sub end_kbd {
     return $currentstring;
 }
 
-#-- <code> tag
+#-- <code> tag (end tag required)
 sub start_code {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1048,7 +1058,7 @@ sub end_code {
     return $currentstring;
 }
 
-#-- <em> tag
+#-- <em> tag (end tag required)
 sub start_em {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1071,7 +1081,7 @@ sub end_em {
     return $currentstring;
 }
 
-#-- <q> tag
+#-- <q> tag (end tag required)
 sub start_q {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1094,7 +1104,7 @@ sub end_q {
     return $currentstring;
 }
 
-#-- <p> tag
+#-- <p> tag (end tag optional)
 sub start_p {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -1117,7 +1127,7 @@ sub end_p {
     return $currentstring;
 }
 
-#-- <br> tag
+#-- <br> tag (end tag forbidden)
 sub start_br {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $currentstring = '';
@@ -1140,7 +1150,7 @@ sub end_br {
     return $currentstring;
 }
 
-#-- <big> tag
+#-- <big> tag (end tag required)
 sub start_big {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1163,7 +1173,7 @@ sub end_big {
     return $currentstring;
 }
 
-#-- <small> tag
+#-- <small> tag (end tag required)
 sub start_small {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1186,7 +1196,7 @@ sub end_small {
     return $currentstring;
 }
 
-#-- <basefont> tag
+#-- <basefont> tag (end tag forbidden)
 sub start_basefont {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $currentstring = '';
@@ -1215,7 +1225,7 @@ sub end_basefont {
     return $currentstring;
 }
 
-#-- <font> tag
+#-- <font> tag (end tag required)
 sub start_font {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $currentstring = '';
@@ -1253,7 +1263,7 @@ sub end_font {
     return $currentstring;
 }
  
-#-- <strike> tag
+#-- <strike> tag (end tag required)
 sub start_strike {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1279,7 +1289,7 @@ sub end_strike {
     return $currentstring;
 }
 
-#-- <s> tag
+#-- <s> tag (end tag required)
 sub start_s {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1305,14 +1315,14 @@ sub end_s {
     return $currentstring;
 }
 
-#-- <sub> tag
+#-- <sub> tag (end tag required)
 sub start_sub {
     my ($target,$token) = @_;
     my $currentstring = '';
     if ($target eq 'web') {
 	$currentstring .= $token->[4];
     } elsif ($target eq 'tex') {
-	$currentstring .= "\$_{ ";
+	$currentstring .= "\$_{";
     } 
     return $currentstring;
 }
@@ -1323,19 +1333,19 @@ sub end_sub {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	$currentstring .= " }\$";
+	$currentstring .= "}\$";
     }
     return $currentstring;
 }
 
-#-- <sup> tag
+#-- <sup> tag (end tag required)
 sub start_sup {
     my ($target,$token) = @_;
     my $currentstring = '';
     if ($target eq 'web') {
 	$currentstring .= $token->[4];
     } elsif ($target eq 'tex') {
-	$currentstring .= "\$^{ ";
+	$currentstring .= "\$^{";
     } 
     return $currentstring;
 }
@@ -1346,12 +1356,12 @@ sub end_sup {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	$currentstring .= " }\$";
+	$currentstring .= "}\$";
     }
     return $currentstring;
 }
 
-#-- <hr> tag
+#-- <hr> tag (end tag forbidden)
 sub start_hr {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -1391,7 +1401,7 @@ sub end_hr {
     return $currentstring;
 }
 
-#-- <div> tag
+#-- <div> tag (end tag required)
 sub start_div {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1410,7 +1420,7 @@ sub end_div {
     return $currentstring;
 }
 
-#-- <a> tag
+#-- <a> tag (end tag required)
 sub start_a {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -1440,7 +1450,7 @@ sub end_a {
     return $currentstring;
 }
 
-#-- <li> tag
+#-- <li> tag (end tag optional)
 sub start_li {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -1470,7 +1480,7 @@ sub end_li {
     return $currentstring;
 }
 
-#-- <u> tag
+#-- <u> tag (end tag required)
 sub start_u {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1496,7 +1506,7 @@ sub end_u {
     return $currentstring;
 }
 
-#-- <ul> tag
+#-- <ul> tag (end tag required)
 sub start_ul {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -1539,7 +1549,7 @@ sub end_ul {
     return $currentstring;
 }
 
-#-- <menu> tag
+#-- <menu> tag (end tag required)
 sub start_menu {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1562,7 +1572,7 @@ sub end_menu {
     return $currentstring;
 }
 
-#-- <dir> tag
+#-- <dir> tag (end tag required)
 sub start_dir {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1585,7 +1595,7 @@ sub end_dir {
     return $currentstring;
 }
 
-#-- <ol> tag
+#-- <ol> tag (end tag required)
 sub start_ol {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -1638,7 +1648,7 @@ sub end_ol {
     return $currentstring;
 }
 
-#-- <dl> tag
+#-- <dl> tag (end tag required)
 sub start_dl {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -1716,7 +1726,7 @@ sub item_cleanup {
     return $item;
 }
 
-#-- <dd> tag
+#-- <dd> tag (end tag optional)
 sub start_dd {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -1746,7 +1756,7 @@ sub end_dd {
     return $currentstring;
 }
 
-#-- <table> tag
+#-- <table> tag (end tag required)
 sub start_table {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $textwidth='';
@@ -1984,14 +1994,11 @@ sub end_td_tex {
 		$newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
 		my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
 		foreach my $elementdata (@newdata) {
-		    $elementdata=~s/^\s+(\S.*)/$1/; 
-		    $elementdata=~s/(.*\S)\s+$/$1/;
-		    $elementdata=~s/(\s)+/$1/;
-		    my $lengthnewdata=1.8*length($elementdata);
+		    my $lengthnewdata=1.8*LATEX_length($elementdata);
 		    if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
 		}
 	    } else {
-		$current_length=1.8*length($data);
+		$current_length=1.8*LATEX_length($data);
 	    }
 	    $Apache::londefdef::table[-1]{'length'} .= $current_length.',';
 	    $Apache::londefdef::table[-1]{'TeXlength'} .= '0,';
@@ -2072,7 +2079,7 @@ sub end_th {
     }
     return $currentstring;
 }
-#-- <img> tag
+#-- <img> tag (end tag forbidden)
 sub start_img {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
@@ -2152,7 +2159,9 @@ sub start_img {
 		    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.'} ';
+		    $newsrc=~s/\/home\/httpd\/html\/res//;
+		    $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
+		    $currentstring .= '\vskip 1 mm \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
 		}
 	    }
 	} else {
@@ -2169,6 +2178,44 @@ sub start_img {
 		#<allow> tag will care about replication 
 	    }
 	}
+    } 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::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 $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						     $safeeval,'src','alt',
+						     'TeXwidth','TeXheight',
+						     'width','height');
+	if (!$token->[2]{'width'} && !$token->[2]{'height'}) {
+	    $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
+	    &image_replication($src);
+	    if (-e $src) {
+		my $image = Image::Magick->new;
+		my ($width, $height, $size, $format) = $image->Ping($src);
+		if ($width && $height) {
+		    $token->[2]{'width'} =$width;
+		    $token->[2]{'height'}=$height;
+		    $constructtag=1;
+		}
+	    }
+	}
+	if ($constructtag) {$currentstring=&Apache::edit::rebuild_tag($token);}
     }
     return $currentstring;
 }
@@ -2184,7 +2231,7 @@ sub end_img {
     return $currentstring;
 }
 
-#-- <applet> tag
+#-- <applet> tag (end tag required)
 sub start_applet {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     
@@ -2233,7 +2280,7 @@ sub end_applet {
     return $currentstring;
 }
 
-#-- <embed> tag
+#-- <embed> tag (end tag optional/required)
 sub start_embed {    
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
@@ -2265,7 +2312,7 @@ sub end_embed {
     return $currentstring;
 }
 
-#-- <param> tag
+#-- <param> tag (end tag forbidden)
 sub start_param {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     if (&Apache::lonxml::get_param
@@ -2320,7 +2367,8 @@ sub end_allow {
     return '';
 }
 
-#-- Frames
+#-- Frames (end tag required)
+#-- <frameset>
 sub start_frameset {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2366,7 +2414,7 @@ sub end_frameset {
     return $currentstring;
 }
 
-#-- <xmp>
+#-- <xmp> (end tag required)
 sub start_xmp {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -2389,7 +2437,7 @@ sub end_xmp {
     return $currentstring;
 }
 
-#-- <pre>
+#-- <pre> (end tag required)
 sub start_pre {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
@@ -2472,7 +2520,7 @@ sub end_blankspace {
     return $currentstring;
 }
 
-#-- <abbr> tag
+#-- <abbr> tag (end tag required)
 sub start_abbr {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2491,7 +2539,7 @@ sub end_abbr {
     return $currentstring;
 }
 
-#-- <acronym> tag
+#-- <acronym> tag (end tag required)
 sub start_acronym {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2510,7 +2558,7 @@ sub end_acronym {
     return $currentstring;
 }
 
-#-- <area> tag
+#-- <area> tag (end tag forbidden)
 sub start_area {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2529,7 +2577,7 @@ sub end_area {
     return $currentstring;
 }
 
-#-- <base> tag
+#-- <base> tag (end tag forbidden)
 sub start_base {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2548,7 +2596,7 @@ sub end_base {
     return $currentstring;
 }
 
-#-- <bdo> tag
+#-- <bdo> tag (end tag required)
 sub start_bdo {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2567,7 +2615,7 @@ sub end_bdo {
     return $currentstring;
 }
 
-#-- <bgsound> tag
+#-- <bgsound> tag (end tag optional)
 sub start_bgsound {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2586,7 +2634,7 @@ sub end_bgsound {
     return $currentstring;
 }
 
-#-- <blink> tag
+#-- <blink> tag (end tag required)
 sub start_blink {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2605,7 +2653,7 @@ sub end_blink {
     return $currentstring;
 }
 
-#-- <blockquote> tag
+#-- <blockquote> tag (end tag required)
 sub start_blockquote {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2624,7 +2672,7 @@ sub end_blockquote {
     return $currentstring;
 }
 
-#-- <button> tag
+#-- <button> tag (end tag required)
 sub start_button {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2643,7 +2691,7 @@ sub end_button {
     return $currentstring;
 }
 
-#-- <caption> tag
+#-- <caption> tag (end tag required)
 sub start_caption {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2662,7 +2710,7 @@ sub end_caption {
     return $currentstring;
 }
 
-#-- <col> tag
+#-- <col> tag (end tag forbdden)
 sub start_col {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2681,7 +2729,7 @@ sub end_col {
     return $currentstring;
 }
 
-#-- <colgroup> tag
+#-- <colgroup> tag (end tag optional)
 sub start_colgroup {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2700,7 +2748,7 @@ sub end_colgroup {
     return $currentstring;
 }
 
-#-- <del> tag
+#-- <del> tag (end tag required)
 sub start_del {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2719,7 +2767,7 @@ sub end_del {
     return $currentstring;
 }
 
-#-- <fieldset> tag
+#-- <fieldset> tag (end tag required)
 sub start_fieldset {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2738,7 +2786,7 @@ sub end_fieldset {
     return $currentstring;
 }
 
-#-- <frame> tag
+#-- <frame> tag (end tag forbidden)
 sub start_frame {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2757,7 +2805,7 @@ sub end_frame {
     return $currentstring;
 }
 
-#-- <iframe> tag
+#-- <iframe> tag (end tag required)
 sub start_iframe {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2776,7 +2824,7 @@ sub end_iframe {
     return $currentstring;
 }
 
-#-- <ins> tag
+#-- <ins> tag (end tag required)
 sub start_ins {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2795,7 +2843,7 @@ sub end_ins {
     return $currentstring;
 }
 
-#-- <isindex> tag
+#-- <isindex> tag (end tag forbidden)
 sub start_isindex {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2814,7 +2862,7 @@ sub end_isindex {
     return $currentstring;
 }
 
-#-- <keygen> tag
+#-- <keygen> tag (end tag forbidden)
 sub start_keygen {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2852,7 +2900,7 @@ sub end_label {
     return $currentstring;
 }
 
-#-- <layer> tag
+#-- <layer> tag (end tag required)
 sub start_layer {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2871,7 +2919,7 @@ sub end_layer {
     return $currentstring;
 }
 
-#-- <legend> tag
+#-- <legend> tag (end tag required)
 sub start_legend {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2890,7 +2938,7 @@ sub end_legend {
     return $currentstring;
 }
 
-#-- <link> tag
+#-- <link> tag (end tag forbidden)
 sub start_link {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -2909,7 +2957,7 @@ sub end_link {
     return $currentstring;
 }
 
-#-- <marquee> tag
+#-- <marquee> tag (end tag optional)
 sub start_marquee {
     my ($target,$token) = @_;
     my $currentstring = '';
@@ -3318,5 +3366,26 @@ sub recalc {
     return $value.' mm';
 }
 
+sub LATEX_length {
+    my $garbage=shift;
+    $garbage=~s/^\s+(\S.*)/$1/; 
+    $garbage=~s/(.*\S)\s+$/$1/;
+    $garbage=~s/(\s)+/$1/;
+    $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;
+    $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$|\$)//g;
+    $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)/1/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)/ /g;
+    $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g; 
+    my  $value=length($garbage);
+    return $value;
+}
+
+
+
+
 1;
 __END__
