--- loncom/xml/londefdef.pm 2005/03/16 21:35:17 1.264 +++ loncom/xml/londefdef.pm 2005/07/07 10:09:50 1.277 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # Tags Default Definition Module # -# $Id: londefdef.pm,v 1.264 2005/03/16 21:35:17 raeburn Exp $ +# $Id: londefdef.pm,v 1.277 2005/07/07 10:09:50 foxr Exp $ # # # Copyright Michigan State University Board of Trustees @@ -39,7 +39,7 @@ package Apache::londefdef; -use Apache::lonnet(); +use Apache::lonnet; use strict; use Apache::lonxml; use Apache::File(); @@ -90,7 +90,8 @@ sub start_m { $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]); #&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) { &Apache::lonxml::warning("tth error: ". $Apache::lontexconvert::errorstring); @@ -132,7 +133,7 @@ sub start_tthoption { if ($target eq 'web') { my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser); $inside=~s/^\s*//; - if ($ENV{'browser.mathml'}) { + if ($env{'browser.mathml'}) { &tth::ttmoptions($inside); } else { &tth::tthoptions($inside); @@ -151,15 +152,14 @@ sub end_tthoption { sub start_html { my ($target,$token) = @_; my $currentstring = ''; - my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'}; + my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'}; &Apache::lontexconvert::init_tth(); - if ($target eq 'web' || $target eq 'edit') { + if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) { $currentstring = &Apache::lonxml::xmlbegin(); } elsif ($target eq 'tex') { - @Apache::londefdef::table = (); $currentstring .= '\documentclass[letterpaper]{article}'; - if (($ENV{'form.latex_type'}=~'batchmode') || - (!$ENV{'request.role.adv'})) {$currentstring .='\batchmode';} + if (($env{'form.latex_type'}=~'batchmode') || + (!$env{'request.role.adv'})) {$currentstring .='\batchmode';} $currentstring .= '\newcommand{\keephidden}[1]{}'. '\renewcommand{\deg}{$^{\circ}$}'. '\usepackage{longtable}'. @@ -202,7 +202,7 @@ sub start_head { sub end_head { my ($target,$token) = @_; my $currentstring = ''; - if ($target eq 'web' && $ENV{'request.state'} eq 'published') { + if ($target eq 'web' && $env{'request.state'} eq 'published') { $currentstring = &Apache::lonmenu::registerurl(undef,$target). $token->[2]; } @@ -490,15 +490,15 @@ sub start_body { return ''; } if (!$Apache::lonxml::registered && - $ENV{'request.state'} eq 'published') { + $env{'request.state'} eq 'published') { $currentstring.=''. &Apache::lonmenu::registerurl(undef,$target).''; } # Accessibility - if ($ENV{'browser.imagesuppress'} eq 'on') { + if ($env{'browser.imagesuppress'} eq 'on') { delete($token->[2]->{'background'}); } - if ($ENV{'browser.fontenhance'} eq 'on') { + if ($env{'browser.fontenhance'} eq 'on') { my $style=''; foreach my $key (keys(%{$token->[2]})) { if ($key =~ /^style$/i) { @@ -508,7 +508,7 @@ sub start_body { } $token->[2]->{'style'}=$style.'; font-size: x-large;'; } - if ($ENV{'browser.blackwhite'} eq 'on') { + if ($env{'browser.blackwhite'} eq 'on') { delete($token->[2]->{'font'}); delete($token->[2]->{'link'}); delete($token->[2]->{'alink'}); @@ -535,17 +535,17 @@ sub start_body { $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents(). ';'.$onUnload; - if ($ENV{'request.state'} ne 'construct') { + if ($env{'request.state'} ne 'construct') { $currentstring .= '<'.$token->[1]; } foreach (keys %{$token->[2]}) { $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"'; } - if ($ENV{'request.state'} ne 'construct') { + if ($env{'request.state'} ne 'construct') { $currentstring.='>'; } - if ($ENV{'request.state'} ne 'published') { - my $remote=($ENV{'environment.remote'} ne 'off'); + if ($env{'request.state'} ne 'published') { + my $remote=($env{'environment.remote'} ne 'off'); $currentstring=&Apache::loncommon::bodytag(undef,undef, $currentstring,$remote); $currentstring.=(< if ($target eq 'web') { - $currentstring = &Apache::lonxml::xmlend($target,$parser); + $currentstring .= &Apache::lonxml::xmlend($target,$parser); } elsif ($target eq 'tex') { - $currentstring = '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}'; + $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}'; } return $currentstring; } @@ -577,11 +577,11 @@ sub end_body { #--
tag (end tag required) sub start_center { my ($target,$token) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close off any prior para. if ($target eq 'web') { - $currentstring = $token->[4]; + $currentstring .= $token->[4]; } elsif ($target eq 'tex') { - $currentstring = '\begin{center}'; + $currentstring .= '\begin{center}'; } return $currentstring; } @@ -646,7 +646,7 @@ sub end_strong { #--

tag (end tag required) sub start_h1 { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close off any prior para. if ($target eq 'web') { $currentstring .= $token->[4]; } elsif ($target eq 'tex') { @@ -661,9 +661,9 @@ sub start_h1 { } my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); if (not defined $TeXsize) {$TeXsize="large";} - $currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; + $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; } elsif ($target eq 'meta') { - $currentstring=''; + $currentstring.=''; &start_output($target); } return $currentstring; @@ -695,7 +695,7 @@ sub end_h1 { #--

tag sub start_h2 { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close off any prior para. if ($target eq 'web') { $currentstring .= $token->[4]; } elsif ($target eq 'tex') { @@ -710,7 +710,7 @@ sub start_h2 { } my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); if (not defined $TeXsize) {$TeXsize="large";} - $currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; + $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; } return $currentstring; } @@ -738,7 +738,7 @@ sub end_h2 { #--

tag sub start_h3 { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close off any prior para. if ($target eq 'web') { $currentstring .= $token->[4]; } elsif ($target eq 'tex') { @@ -753,7 +753,7 @@ sub start_h3 { } my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); if (not defined $TeXsize) {$TeXsize="large";} - $currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; + $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; } return $currentstring; } @@ -781,7 +781,7 @@ sub end_h3 { #--

tag sub start_h4 { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close off any prior para. if ($target eq 'web') { $currentstring .= $token->[4]; } elsif ($target eq 'tex') { @@ -796,7 +796,7 @@ sub start_h4 { } my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); if (not defined $TeXsize) {$TeXsize="large";} - $currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; + $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; } return $currentstring; } @@ -824,7 +824,7 @@ sub end_h4 { #--

tag sub start_h5 { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close off any prior paras. if ($target eq 'web') { $currentstring .= $token->[4]; } elsif ($target eq 'tex') { @@ -839,7 +839,7 @@ sub start_h5 { } my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); if (not defined $TeXsize) {$TeXsize="large";} - $currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; + $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; } return $currentstring; } @@ -867,7 +867,7 @@ sub end_h5 { #--
tag sub start_h6 { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close off any prior paras. if ($target eq 'web') { $currentstring .= $token->[4]; } elsif ($target eq 'tex') { @@ -882,7 +882,7 @@ sub start_h6 { } my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); if (not defined $TeXsize) {$TeXsize="large";} - $currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; + $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; } return $currentstring; } @@ -1114,52 +1114,64 @@ sub end_q { return $currentstring; } +#

is a bit strange since it does not require a closing

+# 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

+ #--

tag (end tag optional) #optional attribute - align="center|left|right" sub start_p { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # close off prior para if in progress. if ($target eq 'web') { $currentstring .= $token->[4]; + $closing_string = '

'; # Not sure this is correct. } elsif ($target eq 'tex') { my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); if ($align eq 'center') { - $currentstring='\begin{center}\par'; + $currentstring .='\begin{center}\par'; + $closing_string = '\end{center}'; } elsif ($align eq 'right') { - $currentstring='\makebox['.$ENV{'form.textwidth'}.']{\hfill\llap{'; + $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{'; + $closing_string= '}}'; } elsif ($align eq 'left') { - $currentstring='\noindent\makebox['.$ENV{'form.textwidth'}.']{\rlap{'; + $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{'; + $closing_string = '}\hfill}'; } else { - $currentstring='\par '; + $currentstring.='\par '; + $closing_string = '\strut\\\\\strut'; } my $signal=1;#

does not work inside ... - foreach my $tag (@$tagstack) {if (lc($tag) eq 'b') {$signal=0;} - if (!$signal) {$currentstring = '';} + 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? } - } - return $currentstring; -} -sub end_p { - my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; - if ($target eq 'web') { - $currentstring .= $token->[2]; - } elsif ($target eq 'tex') { - my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); - if (not defined $align) { - $currentstring.='\strut\\\\\strut '; - } elsif ($align eq 'center') { - $currentstring .= '\end{center}'; - } elsif ($align eq 'right') { - $currentstring .= '}}'; - } elsif ($align eq 'left') { - $currentstring .= '}\hfill}'; - } } 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 $current_string; +} +} #--
tag (end tag forbidden) sub start_br { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; @@ -1277,8 +1289,8 @@ sub start_font { if ($target eq 'web') { my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval); if ($face!~/symbol/i) { - if (($ENV{'browser.fontenhance'} eq 'on') || - ($ENV{'browser.blackwhite'} eq 'on')) { return ''; } + if (($env{'browser.fontenhance'} eq 'on') || + ($env{'browser.blackwhite'} eq 'on')) { return ''; } } $currentstring = $token->[4]; } elsif ($target eq 'tex') { @@ -1405,7 +1417,7 @@ sub end_sup { #--

tag (end tag forbidden) sub start_hr { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # End enclosing para. if ($target eq 'web') { $currentstring .= $token->[4]; } elsif ($target eq 'tex') { @@ -1445,7 +1457,7 @@ sub end_hr { #--
tag (end tag required) sub start_div { my ($target,$token) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close enclosing para. if ($target eq 'web') { $currentstring .= $token->[4]; } @@ -1527,9 +1539,9 @@ sub start_li { sub end_li { my ($target,$token) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # In case there's a

in the

  • if ($target eq 'web') { - $currentstring = $token->[2]; + $currentstring .= $token->[2]; } return $currentstring; } @@ -1563,9 +1575,9 @@ sub end_u { #--
      tag (end tag required) sub start_ul { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close off enclosing list. if ($target eq 'web') { - $currentstring = $token->[4]; + $currentstring .= $token->[4]; } elsif ($target eq 'tex') { my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0); $Apache::londefdef::list_index=0; @@ -1630,11 +1642,11 @@ sub end_menu { #-- tag (end tag required) sub start_dir { my ($target,$token) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # In case there's a

      prior to the list. if ($target eq 'web') { - $currentstring = $token->[4]; + $currentstring .= $token->[4]; } elsif ($target eq 'tex') { - $currentstring = " \\begin{itemize} "; + $currentstring .= " \\begin{itemize} "; } return $currentstring; } @@ -1653,9 +1665,9 @@ sub end_dir { #--

        tag (end tag required) sub start_ol { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # In case there's a

        prior to the list. if ($target eq 'web') { - $currentstring = $token->[4]; + $currentstring .= $token->[4]; } elsif ($target eq 'tex') { $Apache::londefdef::list_index=0; my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0); @@ -1707,11 +1719,11 @@ sub end_ol { #--

        tag (end tag required) sub start_dl { my ($target,$token) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # In case there's a

        unclosed prior to the list. if ($target eq 'web') { - $currentstring = $token->[4]; + $currentstring .= $token->[4]; } elsif ($target eq 'tex') { - $currentstring = '\begin{description}'; + $currentstring .= '\begin{description}'; $Apache::londefdef::DL++; push(@Apache::londefdef::description,[]); $Apache::londefdef::DD[$Apache::londefdef::DL]=0; @@ -1814,19 +1826,25 @@ sub end_dd { } #-- tag (end tag required) +#
        also ends any prior

        that is not closed. +# but, unless I allow

        's to nest, that's the +# only way I could think of to allow

        in +#

        bodies +# #list of supported attributes: border,width,TeXwidth sub start_table { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my ($textwidth,$currentstring)=('',''); + my $textwidth = ''; + my $currentstring = &end_p; if ($target eq 'web') { - $currentstring = $token->[4]; + $currentstring .= $token->[4]; } elsif ($target eq 'tex') { my $aa = {}; push @Apache::londefdef::table, $aa; $Apache::londefdef::table[-1]{'row_number'} = -1; #maximum table's width (default coincides with text line length) if ($#Apache::londefdef::table==0) { - $textwidth=&recalc($ENV{'form.textwidth'}); #result is always in mm + $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm $textwidth=~/(\d+\.?\d*)/; $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame } else { @@ -1883,7 +1901,7 @@ sub start_table { $Apache::londefdef::table[-1]{'minlen'}=[]; $Apache::londefdef::table[-1]{'content'}=[]; $Apache::londefdef::table[-1]{'align'}=[]; - $currentstring='\keephidden{NEW TABLE ENTRY}'; + $currentstring.='\keephidden{NEW TABLE ENTRY}'; } return $currentstring; } @@ -2137,9 +2155,9 @@ sub start_tr { sub end_tr { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close any pending

        in the row. if ($target eq 'web') { - $currentstring = $token->[2]; + $currentstring .= $token->[2]; } elsif ($target eq 'tex') { if ($Apache::londefdef::TD_redirection) { &end_td_tex($parstack,$parser,$safeeval); @@ -2414,9 +2432,9 @@ sub end_th_tex { sub end_th { my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; - my $currentstring = ''; + my $currentstring = &end_p; # Close any open

        in the row. if ($target eq 'web') { - $currentstring = $token->[2]; + $currentstring .= $token->[2]; } elsif ($target eq 'tex') { $Apache::londefdef::TD_redirection =0; &end_th_tex($parstack,$parser,$safeeval); @@ -2450,7 +2468,7 @@ sub start_img { # Render unto browsers that which are the browser's... if ($target eq 'web') { - if ($ENV{'browser.imagesuppress'} ne 'on') { + if ($env{'browser.imagesuppress'} ne 'on') { $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src}); } else { my $alttag= &Apache::lonxml::get_param @@ -2498,19 +2516,25 @@ sub start_img { &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src"); #if original gif/jpg/png file exist do following: + my $origsrc=$src; my ($path,$file) = &get_eps_image($src); $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src); &Apache::lonxml::debug("path = $path file = $file src = $src"); if (-e $src) { &Apache::lonxml::debug("$src exists"); my ($height_param,$width_param)= - &image_size($src,0.3,$parstack,$safeeval); + &image_size($origsrc,0.3,$parstack,$safeeval); my $destpath = $path; $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit. my $destfile = $file; $destfile =~ s/ /\_/g; + my $size; + if ($width_param) { $size.='width='.$width_param.' mm,'; } + if ($height_param) { $size.='height='.$height_param.' mm]'; } + $size='['.$size; + $size=~s/,$/]/; $currentstring .= '\graphicspath{{'.$destpath.'}}' - .'\includegraphics[width='.$width_param.' mm,height='.$height_param.'mm]{'.$destfile.'} '; + .'\includegraphics'.$size.'{'.$destfile.'} '; # If there's an alignment specification we need to honor it here. # For the horizontal alignments, we will also honor the @@ -2650,7 +2674,7 @@ sub start_applet { my $currentstring = ''; if ($target eq 'web') { - if ($ENV{'browser.appletsuppress'} ne 'on') { + if ($env{'browser.appletsuppress'} ne 'on') { $currentstring = &Apache::lonenc::encrypt_ref($token, {'code'=>$code, 'archive'=>$archive} @@ -2696,7 +2720,7 @@ sub start_embed { $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src; my $currentstring = ''; if ($target eq 'web') { - if ($ENV{'browser.embedsuppress'} ne 'on') { + if ($env{'browser.embedsuppress'} ne 'on') { $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src}); } else { my $alttag=&Apache::lonxml::get_param @@ -2789,10 +2813,10 @@ sub end_allow { #-- sub start_frameset { my ($target,$token) = @_; - my $currentstring = ''; + my $currentstring = ''; # Close any pending para. if ($target eq 'web') { if (!$Apache::lonxml::registered && - $ENV{'request.state'} eq 'published') { + $env{'request.state'} eq 'published') { $currentstring.=''. &Apache::lonmenu::registerurl(undef,$target).''; } @@ -2858,7 +2882,7 @@ sub end_xmp { #-- 

         (end tag required)
 sub start_pre {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-    my $currentstring = '';
+    my $currentstring = &end_p;	# close off pending 
        
     if ($target eq 'web') {
 	$currentstring .= $token->[4];
     } elsif ($target eq 'tex') {
@@ -2921,7 +2945,7 @@ sub end_externallink {
 #-- 
 sub start_blankspace {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-    my $currentstring = '';
+    my $currentstring = &end_p;	# closes off any unclosed 
        
     if ($target eq 'tex') {
 	my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
 	$currentstring .= '\vskip '.$howmuch.' ';
@@ -3074,9 +3098,9 @@ sub end_blink {
 #-- 
         tag (end tag required)
 sub start_blockquote {
     my ($target,$token) = @_;
-    my $currentstring = '';
+    my $currentstring = &end_p;	# Close any unclosed 
        
     if ($target eq 'web') {
-	$currentstring = $token->[4];     
+	$currentstring .= $token->[4];     
     } 
     return $currentstring;
 }
@@ -3397,9 +3421,9 @@ sub end_marquee {
 #--  tag (end tag required)
 sub start_multicol {
     my ($target,$token) = @_;
-    my $currentstring = '';
+    my $currentstring = &end_p;	# Close any pending 
        
     if ($target eq 'web') {
-	$currentstring = $token->[4];     
+	$currentstring .= $token->[4];     
     } 
     return $currentstring;
 }
@@ -3595,9 +3619,9 @@ sub end_server {
 #--  tag (end tag forbidden)
 sub start_spacer {
     my ($target,$token) = @_;
-    my $currentstring = '';
+    my $currentstring = &end_p;	# Close off any open 
         tag.
     if ($target eq 'web') {
-	$currentstring = $token->[4];     
+	$currentstring .= $token->[4];     
     } 
     return $currentstring;
 }
@@ -3761,21 +3785,36 @@ sub image_replication {
     }
     return '';
 }
+#
+#   Get correct sizing parameter for an image given
+#   it's initial ht. and wid.  This allows sizing of
+#   images that are generated on-the-fly (e.g. gnuplot)
+#   as well as serving as a utility for image_size.
+# 
+#  Parameter:
+#        height_param
+#        width_param    - Initial picture dimensions.
+#        scaling        - A scale factor.
+#        parstack,      - the current stack of tag attributes 
+#                         from the xml parser
+#        safeeval,      - pointer to the safespace
+#        depth,         - from what level in the stack to look for attributes
+#                         (assumes -1 if unspecified)
+#        cis            - look for attrubutes case insensitively
+#                         (assumes false)
+#
+# Returns:
+#   height, width   - new dimensions.
+#
+sub resize_image {
+    my ($height_param, $width_param, $scaling,
+	$parstack, $safeeval, $depth, $cis) = @_;
 
-sub image_size {
-    my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
+    # First apply the scaling...
+
+    $height_param = $height_param * $scaling;
+    $width_param  = $width_param  * $scaling;
 
-    #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') * $scaling;;
-    my $height_param = $image->Get('height') * $scaling;
-    &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
-    undef($image);
     #do we have any specified LaTeX size of the picture?
     my $toget='TeXwidth'; 
     if ($cis) { 
@@ -3792,24 +3831,57 @@ sub image_size {
     if ($TeXwidth) { 
 	my $old_width_param=$width_param;
 	if ($TeXwidth=~/(\d+)\s*\%/) {
-	    $width_param = $1*$ENV{'form.textwidth'}/100;
+	    $width_param = $1*$env{'form.textwidth'}/100;
 	} else { 
 	    $width_param = $TeXwidth;
 	}
-	$height_param=$TeXwidth/$old_width_param*$height_param;
+	if ($TeXheight) {
+	    $height_param = $TeXheight;
+	} elsif ($old_width_param) {
+	    $height_param=$TeXwidth/$old_width_param*$height_param;
+	}
     } elsif ($TeXheight) {
 	$height_param = $TeXheight;
-	$width_param  = $TeXheight/$height_param*$width_param;
+	if ($height_param) {
+	    $width_param  = $TeXheight/$height_param*$width_param;
+	}
     } elsif ($width) {
 	my $old_width_param=$width_param;
 	$width_param = $width*$scaling;
-        $height_param=$width_param/$old_width_param*$height_param;
+	if ($old_width_param) {
+	    $height_param=$width_param/$old_width_param*$height_param;
+	}
     }
-    if ($width_param > $ENV{'form.textwidth'}) {
+    if ($width_param > $env{'form.textwidth'}) {
         my $old_width_param=$width_param;
-	$width_param =0.95*$ENV{'form.textwidth'};
-        $height_param=$width_param/$old_width_param*$height_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);
 }
 
@@ -3828,10 +3900,10 @@ sub image_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
        ");
+    &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 
        ");
+    &Apache::lonxml::debug("Filelocation gives: $src");
     if (! -e $src) {
 	&Apache::lonxml::debug("$src does not exist");
 	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
@@ -3839,18 +3911,20 @@ sub get_eps_image {
 	    #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
-	    if (not -e $src &&
-		&Apache::lonnet::repcopy($src) ne 'ok') {
+	    #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'}_$ENV{'user.domain'}_printout.dat");
+		open(FILE,">>/home/httpd/prtspool/$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. 
        ");
+		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
 		print FILE "$newsrc\n";
 		close FILE;
 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
@@ -3865,7 +3939,7 @@ sub get_eps_image {
 
 sub eps_generation {
     my ($src,$file,$width_param) = @_;	     
-    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
+    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;