--- loncom/xml/londefdef.pm	2003/10/24 21:11:46	1.186
+++ loncom/xml/londefdef.pm	2004/05/26 15:13:56	1.217
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.186 2003/10/24 21:11:46 albertel Exp $
+# $Id: londefdef.pm,v 1.217 2004/05/26 15:13:56 sakharuk Exp $
 # 
 #
 # Copyright Michigan State University Board of Trustees
@@ -50,8 +50,8 @@ use Apache::File();
 use Image::Magick;
 use Apache::lonmenu();
 use Apache::lonmeta();
+use Apache::Constants qw(:common);
 
-$Apache::londefdef::TD_redirection=0;
 
 BEGIN {
 
@@ -59,6 +59,15 @@ BEGIN {
 
 }
 
+sub initialize_londefdef {
+    $Apache::londefdef::TD_redirection=0;
+    @Apache::londefdef::table = ();
+    $Apache::londefdef::select=0;
+    @Apache::londefdef::description=();
+    $Apache::londefdef::DD_redirection=0;
+    $Apache::londefdef::DT_redirection=0;
+}
+
 #======================= TAG SUBROUTINES =====================
 #-- <output>
 sub start_output {
@@ -73,11 +82,10 @@ sub end_output {
 }
 #-- <m> tag
 sub start_m {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
     my $currentstring = '';
-    if ($target eq 'web') {
-	$Apache::lonxml::prevent_entity_encode++;
-	my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
+    my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
+    if ($target eq 'web' || $target eq 'analyze') {
 	$inside ='\\documentstyle{article}'.$inside;
 	&Apache::lonxml::debug("M is starting with:$inside:");
 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
@@ -94,15 +102,13 @@ sub start_m {
 	#&Apache::lonxml::debug("M is ends with:$currentstring:");
 	$Apache::lonxml::post_evaluate=0;
     } elsif ($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 ';}
 	$Apache::lonxml::post_evaluate=0;
-    } else {
-	my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
     }
     return $currentstring;
 }
@@ -110,11 +116,8 @@ sub start_m {
 sub end_m {
     my ($target,$token) = @_;
     my $currentstring = '';
-    if ($target eq 'web') {
-	$Apache::lonxml::prevent_entity_encode--;
-    } elsif ($target eq 'tex') {
+    if ($target eq 'tex') {
 	$currentstring = "";
-    } elsif ($target eq 'meta') {
     }
     return $currentstring;
 }
@@ -144,21 +147,8 @@ sub end_tthoption {
 sub start_html {
     my ($target,$token) = @_;
     my $currentstring = '';
-    if ($ENV{'browser.mathml'}) {
-	&tth::ttminit();
-	if ($ENV{'browser.unicode'}) {
-	    &tth::ttmoptions('-L -u1');
-	} else {
-	    &tth::ttmoptions('-L -u0');
-	}
-    } else {
-	&tth::tthinit();
-	if ($ENV{'browser.unicode'}) {
-	    &tth::tthoptions('-L -u1');
-	} else {
-	    &tth::tthoptions('-L -u0');
-	}
-    }
+    my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'};
+    &Apache::lontexconvert::init_tth();
     if ($target eq 'web' || $target eq 'edit') {
 	$currentstring = &Apache::lonxml::xmlbegin().
 	    &Apache::lonxml::fontsettings();     
@@ -166,15 +156,21 @@ sub start_html {
 	@Apache::londefdef::table = ();
 	$currentstring .= '\documentclass[letterpaper]{article}';
 	if ($ENV{'form.latex_type'}=~'batchmode') {$currentstring .='\batchmode';} 
-	$currentstring .= '\newcommand{\keephidden}[1]{}
-                           \renewcommand{\deg}{$^{\circ}$}
-                           \usepackage{longtable}
-                           \usepackage{textcomp}
-                           \usepackage{makeidx}
-                           \usepackage[dvips]{graphicx}
-                           \usepackage{epsfig}\usepackage{calc}
-\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}}';
+	$currentstring .= '\newcommand{\keephidden}[1]{}'.
+                          '\renewcommand{\deg}{$^{\circ}$}'.
+                          '\usepackage{longtable}'.
+                          '\usepackage{textcomp}'.
+                          '\usepackage{makeidx}'.
+                          '\usepackage[dvips]{graphicx}'.
+                          '\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;
 }
@@ -399,7 +395,7 @@ sub start_meta {
             my $display=&Apache::lonxml::get_param
 		('display',$parstack,$safeeval,undef,1);
             if ($display) {
-		$display=&HTML::Entities::encode($display);
+		$display=&HTML::Entities::encode($display,'<>&"');
 		$currentstring.='<'.$name.'.display>'.$display.
                                '</'.$name.'.display>';
             }
@@ -541,12 +537,13 @@ sub start_body {
 	if ($ENV{'request.state'} ne 'published') {
 	    $currentstring.=(<<EDITBUTTON);
 		<form method="post">
-		<input type="submit" name="editmode" value="Edit" />
+		<input type="submit" name="editmode" accesskey="e" value="Edit" />
 		</form>
 EDITBUTTON
 	} else {
 	    $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
 	}
+	$currentstring.=&Apache::lonxml::message_location();
     } elsif ($target eq 'tex') {
 	$currentstring = '\begin{document}';  
     } 
@@ -641,8 +638,8 @@ sub start_h1 {
 	$currentstring .= $token->[4];
     } elsif ($target eq 'tex') {
 	my $pre;
-	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
+	if ($align eq 'center') {
 	    $pre='\begin{center}';
 	} elsif ($align eq 'left') {
 	    $pre='\rlap{';
@@ -665,9 +662,9 @@ sub end_h1 {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	my $post;
+	my $post='\vskip 0 mm ';
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $post='\end{center}';
 	} elsif ($align eq 'left') {
 	    $post='} \hfill'.'\vskip 0 mm ';
@@ -691,7 +688,7 @@ sub start_h2 {
     } elsif ($target eq 'tex') {
 	my $pre;
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $pre='\begin{center}';
 	} elsif ($align eq 'left') {
 	    $pre='\rlap{';
@@ -711,9 +708,9 @@ sub end_h2 {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	my $post;
+	my $post='\vskip 0 mm ';
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $post='\end{center}';
 	} elsif ($align eq 'left') {
 	    $post='} \hfill'.'\vskip 0 mm ';
@@ -734,7 +731,7 @@ sub start_h3 {
     } elsif ($target eq 'tex') {
 	my $pre;
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $pre='\begin{center}';
 	} elsif ($align eq 'left') {
 	    $pre='\rlap{';
@@ -754,9 +751,9 @@ sub end_h3 {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	my $post;
+	my $post='\vskip 0 mm ';
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $post='\end{center}';
 	} elsif ($align eq 'left') {
 	    $post='} \hfill'.'\vskip 0 mm ';
@@ -777,7 +774,7 @@ sub start_h4 {
     } elsif ($target eq 'tex') {
 	my $pre;
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $pre='\begin{center}';
 	} elsif ($align eq 'left') {
 	    $pre='\rlap{';
@@ -797,9 +794,9 @@ sub end_h4 {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	my $post;
+	my $post='\vskip 0 mm ';
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $post='\end{center}';
 	} elsif ($align eq 'left') {
 	    $post='} \hfill'.'\vskip 0 mm ';
@@ -820,7 +817,7 @@ sub start_h5 {
     } elsif ($target eq 'tex') {
 	my $pre;
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $pre='\begin{center}';
 	} elsif ($align eq 'left') {
 	    $pre='\rlap{';
@@ -840,9 +837,9 @@ sub end_h5 {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	my $post;
+	my $post='\vskip 0 mm ';
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $post='\end{center}';
 	} elsif ($align eq 'left') {
 	    $post='} \hfill'.'\vskip 0 mm ';
@@ -863,7 +860,7 @@ sub start_h6 {
     } elsif ($target eq 'tex') {
 	my $pre;
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $pre='\begin{center}';
 	} elsif ($align eq 'left') {
 	    $pre='\rlap{';
@@ -883,9 +880,9 @@ sub end_h6 {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	my $post;
+	my $post='\vskip 0 mm ';
 	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
-	if (($align eq 'center') || (not defined $align)) {
+	if ($align eq 'center') {
 	    $post='\end{center}';
 	} elsif ($align eq 'left') {
 	    $post='} \hfill'.'\vskip 0 mm ';
@@ -1105,24 +1102,47 @@ sub end_q {
 }
 
 #-- <p> tag (end tag optional)
+#optional attribute - align="center|left|right"
 sub start_p {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
     if ($target eq 'web') {
 	$currentstring .= $token->[4];
     } elsif ($target eq 'tex') {
-	my $signal=1;
-	foreach my $tag (@$tagstack) {if (lc($tag) eq 'b') {$signal=0;}}
-	if ($signal) {$currentstring .= '\par ';}
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $currentstring='\begin{center}\par';
+	} elsif ($align eq 'right') {
+	    $currentstring='\makebox['.$ENV{'form.textwidth'}.']{\hfill\llap{';
+	} elsif ($align eq 'left') {
+	    $currentstring='\noindent\makebox['.$ENV{'form.textwidth'}.']{\rlap{';
+	} else {
+            $currentstring='\par ';
+        }
+	my $signal=1;#<p> does not work inside <b>...</b> 
+	foreach my $tag (@$tagstack) {if (lc($tag) eq 'b') {$signal=0;}
+	if (!$signal) {$currentstring = '';}
+	}
     }
     return $currentstring;
 }
 
 sub end_p {
-    my ($target,$token) = @_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	if ($$tagstack[-1] eq 'p') {
+	    my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	    if ($align eq 'center') {		
+		$currentstring .= '\end{center}';
+	    } elsif ($align eq 'right') {
+		$currentstring .= '}}';
+	    } elsif ($align eq 'left') {
+		$currentstring .= '}\hfill}';
+	    }
+	}
     }
     return $currentstring;
 }
@@ -1231,9 +1251,7 @@ sub start_font {
     my $currentstring = '';
     if ($target eq 'web') {
 	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
-	if ($face=~/symbol/i) {
-	    $Apache::lonxml::prevent_entity_encode++;
-	} else {
+	if ($face!~/symbol/i) {
 	    if (($ENV{'browser.fontenhance'} eq 'on') || 
 		($ENV{'browser.blackwhite'} eq 'on')) { return ''; }
 	}
@@ -1251,8 +1269,6 @@ sub end_font {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $currentstring = '';
     if ($target eq 'web') {
-	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
-	if ($face=~/symbol/i) {$Apache::lonxml::prevent_entity_encode--;}
 	$currentstring = $token->[2];    
     }  elsif ($target eq 'tex') {
 	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
@@ -1322,7 +1338,7 @@ sub start_sub {
     if ($target eq 'web') {
 	$currentstring .= $token->[4];
     } elsif ($target eq 'tex') {
-	$currentstring .= "\$_{";
+	$currentstring .= '\ensuremath{_{';
     } 
     return $currentstring;
 }
@@ -1333,7 +1349,7 @@ sub end_sub {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	$currentstring .= "}\$";
+	$currentstring .= '}}';
     }
     return $currentstring;
 }
@@ -1345,7 +1361,7 @@ sub start_sup {
     if ($target eq 'web') {
 	$currentstring .= $token->[4];
     } elsif ($target eq 'tex') {
-	$currentstring .= "\$^{";
+	$currentstring .= '\ensuremath{^{';
     } 
     return $currentstring;
 }
@@ -1356,7 +1372,7 @@ sub end_sup {
     if ($target eq 'web') {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
-	$currentstring .= "}\$";
+	$currentstring .= '}}';
     }
     return $currentstring;
 }
@@ -1757,43 +1773,54 @@ sub end_dd {
 }
 
 #-- <table> tag (end tag required)
+#list of supported attributes: border,width,TeXwidth
 sub start_table {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-    my $textwidth='';
-    if (not defined @Apache::londefdef::table) {
-	$textwidth=&recalc($ENV{'form.textwidth'});
-	$textwidth=~/(\d+\.?\d*)/;
-	$textwidth=0.95*$1;
-    } else {
-	$textwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
-    }
-    my $currentstring = '';
+    my ($textwidth,$currentstring)=('','');
     if ($target eq 'web') {
 	$currentstring = $token->[4];     
     } elsif ($target eq 'tex') {
 	my $aa = {};
 	push @Apache::londefdef::table, $aa; 
 	$Apache::londefdef::table[-1]{'row_number'} = -1;
-        #table's width
+        #table's width 
+        #default coincides with text line length
+	if ($#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
+		my $textwidth=$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);
 	if (not defined $TeXwidth) {
 	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);
 	    if ($htmlwidth=~/%/) {
+                $Apache::londefdef::table[-1]{'percent'}=1;
 		$htmlwidth=~/(\d+)/;
-		my $value=$1*$textwidth/100;
-		$Apache::londefdef::table[-1]{'width'}=$value;
+		$Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;;
 	    } else {
 		$Apache::londefdef::table[-1]{'width'}=$textwidth;
 	    }
 	} elsif ($TeXwidth=~/%/) {
+	    $Apache::londefdef::table[-1]{'percent'}=1;
 	    $TeXwidth=~/(\d+)/;
-	    my $value=$1*$textwidth/100;
-            $Apache::londefdef::table[-1]{'width'}=$value;
+            $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
 	} else {
-	    $Apache::londefdef::table[-1]{'width'}=$textwidth;
+	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
 	}        
         #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) { $border = 0; }
 	if ($border) { 
 	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
@@ -1804,9 +1831,18 @@ sub start_table {
 	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
 	    $Apache::londefdef::table[-1]{'vvinc'} = '';
 	}
-	$Apache::londefdef::table[-1]{'output'} = ' \noindent \begin{tabular} ';
-	$currentstring = '\keephidden{NEW TABLE ENTRY}';
-    }
+	if ($#Apache::londefdef::table==0) {
+	    $Apache::londefdef::table[-1]{'output'}='\newline\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]{'maxlen'}=[];
+        $Apache::londefdef::table[-1]{'minlen'}=[];
+        $Apache::londefdef::table[-1]{'content'}=[];
+        $Apache::londefdef::table[-1]{'align'}=[];
+        $currentstring='\keephidden{NEW TABLE ENTRY}';
+   }
     return $currentstring;
 }
  
@@ -1818,64 +1854,167 @@ sub end_table {
     } elsif ($target eq 'tex') {
 	my $inmemory = '';
 	my $output = '';
-	#construct header of the table
-	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
-	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'counter_columns'};$in++) {
-	    $header_of_table .= $Apache::londefdef::table[-1]{'columns'}[$in].$Apache::londefdef::table[-1]{'vvinc'};
+	my $WARNING='';
+        #width of columns from TeXwidth attributes
+	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
+	    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];
+		}	
+	    }
 	}
-	$header_of_table .= '}';
-	#define the length of the table cells
-	#always starts with TeXwidth (if defined everything else is ignored)
-	my @length_row_final = split(/,/,$Apache::londefdef::table[-1]{'TeXlengthrow'}[0]);
-	for (my $in=1;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-	    my @length_row = split(/,/,$Apache::londefdef::table[-1]{'TeXlengthrow'}[$in]);
-	    for (my $jn=0;$jn<=$#length_row;$jn++) {
-		if ($length_row_final[$jn]<$length_row[$jn]) {$length_row_final[$jn]=$length_row[$jn];}
-	    }
-	}
-	#continues trying estimate the width of raw data
-	my @length_raw_row = split(/,/,$Apache::londefdef::table[-1]{'lengthrow'}[0]);
-	for (my $in=1;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-	    my @length_row = split(/,/,$Apache::londefdef::table[-1]{'lengthrow'}[$in]);
-	    for (my $jn=0;$jn<=$#length_row;$jn++) {
-		if ($length_raw_row[$jn]<$length_row[$jn]) {$length_raw_row[$jn]=$length_row[$jn];}
-	    }
-	}
-        #comparing of TeXwidth and raw data width
-	my $available_length=$Apache::londefdef::table[-1]{'width'};
-	my $needed=0;
-	for (my $jn=0;$jn<=$#length_row_final;$jn++) {
-	    if ($length_row_final[$jn]!=0) {
-		$available_length=$available_length-$length_row_final[$jn];
-		$needed++;
-	    }
-	}
-	$needed=$#length_row_final-$needed+1;
-	for (my $jn=0;$jn<=$#length_row_final;$jn++) {
-	    if ($length_row_final[$jn]==0) {
-		if ($length_raw_row[$jn]<$available_length) {
-		    $length_row_final[$jn]=$length_raw_row[$jn];
-		    $available_length=$available_length-$length_raw_row[$jn];
-		    $needed--;
+        #free space and number of empty columns
+	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
+##	&Apache::lonnet::logthis("Available space $Apache::londefdef::table[-1]{'width'}");
+	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
+	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
+		$empty_columns++;
+	    } else {
+		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
+	    }
+	}
+        #boundaries for contents columns
+	my @min_len=();#columns can not be narrower 
+	my @max_len=();#maximum length of column
+	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
+		my ($localmin,$localmax)=(0,0);
+		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];
+		    }
+		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
+			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
+		    }
+		}
+		push @min_len, $localmin;
+		push @max_len, $localmax;
+	}
+	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
+	    my $localmin=0,;
+	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
+		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
+		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
+		}
+	    }
+	    if ($max_len[$jn]<$localmin) {$max_len[$jn]=$localmin;}#object size is bigger
+	    if ($min_len[$jn]<$localmin) {$min_len[$jn]=$localmin;}#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];
+		    }
+		}
+	    } 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];
+			}
+		    }
 		}
 	    }
 	}
-	for (my $jn=0;$jn<=$#length_row_final;$jn++) {
-	    if ($length_row_final[$jn]==0) {
-		$length_row_final[$jn]=0.9*$available_length/$needed;
+        #recalculation for the use of all available width if width is defined in %
+        if ($Apache::londefdef::table[-1]{'percent'}==1) {
+	    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
 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-	    for (my $jn=0;$jn<=$#length_row_final;$jn++) {
-		my $substituted=$length_row_final[$jn];
-		$Apache::londefdef::table[-1]{'rowdata'}[$in]=~s/TOBECHANGEDONNUMBER/$substituted mm/;
-	    }
-	    $output .=  $Apache::londefdef::table[-1]{'rowdata'}[$in];
-	    chop $output;
-	    $output .= ' \\\\ ';
+	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
+		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
+		    $output.='\begin{center}';
+		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
+		    $output.=' \hfill \llap{'
+		}
+		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
+		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
+		    $output.='\end{center}';
+		} elsif ($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'}.$output.'\end{tabular}\vskip 0 mm ';
 	if ($#Apache::londefdef::table > 0) {	    
 	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
 	    pop @Apache::londefdef::table;
@@ -1897,16 +2036,19 @@ sub start_tr {
 	$currentstring = $token->[4];     
     } elsif ($target eq 'tex') {
 	$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 '') {
-	    push @ {$Apache::londefdef::table[-1]{'rows'} }, $alignchar;
+	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
 	} else {
 	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
 	}
 	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
 	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
-	$Apache::londefdef::table[-1]{'TeXlength'} = '';
- 	$Apache::londefdef::table[-1]{'length'} = '';
+	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
+	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 $currentstring;
 }
@@ -1920,8 +2062,6 @@ sub end_tr {
 	if ($Apache::londefdef::TD_redirection) {
 	    &end_td_tex($parstack,$parser,$safeeval);    
 	}
-	push @{ $Apache::londefdef::table[-1]{'TeXlengthrow'} },$Apache::londefdef::table[-1]{'TeXlength'};
-	push @{ $Apache::londefdef::table[-1]{'lengthrow'} },$Apache::londefdef::table[-1]{'length'};
     }
     return $currentstring;
 }
@@ -1958,12 +2098,18 @@ sub tag_check {
  
 sub start_td_tex {
     my ($parstack,$parser,$safeeval) = @_;
-    my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
-    if ($what_to_push eq '') {
-	$what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;
+    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]{'columns'} }, $what_to_push;
+    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 '';
 }
@@ -1974,40 +2120,64 @@ sub end_td_tex {
     my $data=&Apache::lonxml::endredirection();
     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.',';
-	$Apache::londefdef::table[-1]{'length'} .= '0,';
+	push @ {$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)*)/) {
-	    my $current_length=&recalc($1);
-	    $current_length=~/(\d+\.?\d*)/;
-	    $Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';
-	    $Apache::londefdef::table[-1]{'length'} .= '0,';
+	if (($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/\[(\d+\.?\d*)\s*mm\]/) {
+		my $current_length=$1;
+		if ($fwidth<$current_length) {$fwidth=$current_length;}
+		$garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
+	    }
+	    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 $current_length=0;
+	    my ($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 $lengthnewdata=1.8*LATEX_length($elementdata);
+		    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 {
-		$current_length=1.8*LATEX_length($data);
+		$current_length=2.5*&LATEX_length($data);
+                    my @words=split(/ /,$data);
+		    foreach my $word (@words) {
+			my $lengthword=2.5*&LATEX_length($word);
+			if ($min_length<$lengthword) {$min_length=$lengthword;}
+		    }
 	    }
-	    $Apache::londefdef::table[-1]{'length'} .= $current_length.',';
-	    $Apache::londefdef::table[-1]{'TeXlength'} .= '0,';
+	    push @ {$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]/;
 	}
-    @{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{TOBECHANGEDONNUMBER}{'.$data.'} '.$Apache::londefdef::table[-1]{'vinc'};
+    push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
     return'';
 }
 
@@ -2084,10 +2254,13 @@ sub start_img {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
 					 undef,1);
+    if (not $src and ($target eq 'web' or $target eq 'tex')) { 
+	my $inside = &Apache::lonxml::get_all_text("/img",$parser);
+	&Apache::lonnet::logthis("inside was $inside");
+	return '';
+    }
     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;
     my $currentstring = '';
-    my $width_param = '';
-    my $height_param = '';
     my $scaling = .3;
     if ($target eq 'web') {
 	if ($ENV{'browser.imagesuppress'} ne 'on') {
@@ -2103,38 +2276,17 @@ sub start_img {
 	}
     } elsif ($target eq 'tex') {
 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
-	&image_replication($src);
+        #if uploaded restore the path
+	if ($src=~/^\/uploaded\/([^\/]+)\/([^\/]+)\/simplepage\/([^\/]+)$/) {
+	    $src=&Apache::loncommon::propath($1,$2).'/userfiles/simplepage/'.$3;
+	} elsif ($src=~/^\/uploaded\/([^\/]+)\/([^\/]+)\/aboutme\/([^\/]+)$/) {
+	    $src=&Apache::loncommon::propath($1,$2).'/userfiles/aboutme/'.$3;
+	}
 	#if original gif/jpg/png file exist do following:
-	if (-e $src) {          
-	    #defines the default size of image
-	    my $image = Image::Magick->new;
-	    my $current_figure = $image->Read($src);
-	    $width_param = $image->Get('width') * $scaling;;
-	    $height_param = $image->Get('height') * $scaling;;
-	    undef $image;
-	    #do we have any specified size of the picture?
-	    my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);
-	    my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);
-	    my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
-						   undef,1);
-	    if ($TeXwidth ne '') {  
-		if ($TeXwidth=~/(\d+)\s*\%/) {
-		    $width_param = $1*$ENV{'form.textwidth'}/100;
-		} else { 
-		    $width_param = $TeXwidth;
-		}
-	    } elsif ($TeXheight ne '') {
-		$width_param = $TeXheight/$height_param*$width_param;
-	    } elsif ($width ne '') {
-		$width_param = $width*$scaling;      
-	    }
-	    if ($width_param > $ENV{'form.textwidth'}) {$width_param =0.95*$ENV{'form.textwidth'}}
-	    my $file;
-	    my $path;	
-	    if ($src =~ m!(.*)/([^/]*)$!) {
-		$file = $2; 
-		$path = $1.'/'; 
-	    } 
+	if (-e $src) {
+	    #what is the image size?
+	    my $width_param=&image_size($src,$scaling,$parstack,$safeeval);
+            my ($file,$path)=&file_path($src); 
 	    my $newsrc = $src;
 	    $newsrc =~ s/\.(gif|jpg|png)$/.eps/i;
 	    $file=~s/\.(gif|jpg|png)$/.eps/i;
@@ -2154,14 +2306,8 @@ sub start_img {
 			$currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$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";
-		    $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.'} ';
+		    #care about eps dynamical generation
+		    $currentstring.='\vskip 1 mm '.&eps_generation($src,$file,$width_param);
 		}
 	    }
 	} else {
@@ -2198,24 +2344,45 @@ sub start_img {
 	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;
-		    $constructtag=1;
+	my ($osrc,$owidth,$oheight)=
+	    ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
+	my $ctag=&Apache::edit::get_new_args($token,$parstack,
+					     $safeeval,'src','alt',
+					     'TeXwidth','TeXheight',
+					     'width','height');
+	my ($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;$ctag=1;
 		}
 	    }
 	}
-	if ($constructtag) {$currentstring=&Apache::edit::rebuild_tag($token);}
+	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;
 }
@@ -3332,22 +3499,75 @@ sub end_hideweboutput {
 
 sub image_replication {
     my $src = shift;
-    if (not -e $src) {
-	#replicates image itself
-	&Apache::lonnet::repcopy($src);
-	#replicates eps or ps 
-	my $newsrc = $src;
-	$newsrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
-	if (not -e $newsrc) {
-	    if (&Apache::lonnet::repcopy($newsrc) ne 'OK') {
-		$newsrc =~ s/\.eps$/\.ps/;
-		&Apache::lonnet::repcopy($newsrc);
-	    }
-	}
+    if (not -e $src) { &Apache::lonnet::repcopy($src); }
+    #replicates eps or ps 
+    my $epssrc = my $pssrc = $src;
+    $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
+    $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
+    if (not -e $epssrc && not -e $pssrc) {
+	my $result=&Apache::lonnet::repcopy($epssrc);
+	if ($result ne OK) { &Apache::lonnet::repcopy($pssrc); }
     }
     return '';
 }
 
+sub image_size {
+    my ($src,$scaling,$parstack,$safeeval)=@_;
+    #size of image from gif/jpg/jpeg/png 
+    my $image = Image::Magick->new;
+    my $current_figure = $image->Read($src);
+    my $width_param = $image->Get('width') * $scaling;;
+    my $height_param = $image->Get('height') * $scaling;;
+    undef $image;
+    #do we have any specified LaTeX size of the picture?
+    my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);
+    my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);
+    #do we have any specified web size of the picture?
+    my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
+					   undef,1);
+    if ($TeXwidth ne '') {  
+	if ($TeXwidth=~/(\d+)\s*\%/) {
+	    $width_param = $1*$ENV{'form.textwidth'}/100;
+	} else { 
+	    $width_param = $TeXwidth;
+	}
+    } elsif ($TeXheight ne '') {
+	$width_param = $TeXheight/$height_param*$width_param;
+    } elsif ($width ne '') {
+	$width_param = $width*$scaling;      
+    }
+    if ($width_param > $ENV{'form.textwidth'}) {$width_param =0.95*$ENV{'form.textwidth'}}
+    return $width_param;
+}
+
+sub eps_generation {
+    my ($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)\//\/$1\//;
+    }
+    return ' \graphicspath{{/home/httpd/prtspool'.$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 {
     my $argument = shift;
     if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
@@ -3368,18 +3588,27 @@ sub recalc {
 
 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;
+    $garbage=~s/^\s+$//;
+    $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)/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; 
+    $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;
+
+    &Apache::lonnet::logthis("garbage was just $garbage");
     my  $value=length($garbage);
     return $value;
 }