--- loncom/xml/londefdef.pm	2010/11/01 10:52:09	1.425
+++ loncom/xml/londefdef.pm	2019/05/17 15:41:32	1.456.2.4
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.425 2010/11/01 10:52:09 foxr Exp $
+# $Id: londefdef.pm,v 1.456.2.4 2019/05/17 15:41:32 raeburn Exp $
 # 
 #
 # Copyright Michigan State University Board of Trustees
@@ -47,6 +47,7 @@ use Image::Magick;
 use Apache::lonmenu();
 use Apache::lonmeta();
 use Apache::lonlocal;
+use Apache::loncommon();
 use Apache::Constants qw(:common);
 use File::Basename;
 use LONCAPA();
@@ -54,7 +55,7 @@ use LONCAPA();
 
 BEGIN {
 
-    &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
+    &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','style','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
 
 }
 
@@ -91,6 +92,14 @@ sub start_m {
     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
     if ($target eq 'web' || $target eq 'analyze') {
 	&Apache::lonxml::debug("M is starting with:$inside:");
+        if (!($inside =~ /^\s*\$.*\$\s*$/ || $inside =~ /^\s*\\[([].*\\[)\]]\s*$/)) {
+            # Non-math LaTeX will not be rendered correctly with MathJax
+            # and it should be avoided anyway.
+            # On top of that, MathJax will render math without $, but
+            # it will fail with tth. This is worth a warning.
+            # (even though some people might just use latex for printing)
+            &Apache::lonxml::warning(&mt("Missing \$ in <m>."));
+        }
 	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
 	if ($eval eq 'on') {
 	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
@@ -382,6 +391,9 @@ sub start_meta {
 	} else {
 	    $currentstring = $token->[4];
 	}
+        if ($env{'form.grade_imsexport'}) {
+            $currentstring = '';
+        }
     } elsif ($target eq 'meta') {
 	unless (&Apache::lonxml::get_param
 		('http-equiv',$parstack,$safeeval,undef,1)) {
@@ -454,6 +466,32 @@ sub insert_meta {
     <meta />';
 }
 
+#-- <start> tag
+sub start_style {
+	my ($target, $token, $tagstack, $parstack, $parser, $safeeval, $style) = @_;
+	my $currentstring = '';
+
+	if ($target eq 'tex') {
+		Apache::lonxml::startredirection();
+	} else {
+		$currentstring = $token->[4];
+	}
+	
+	return $currentstring;
+}
+
+sub end_style {
+	my ($target, $token, $tagstack, $parstack, $parser, $safeeval) = @_;
+	my $currentstring = '';
+
+	if ($target eq 'tex') {
+		Apache::lonxml::endredirection();
+	} else {
+		$currentstring = $token->[2];
+	}
+	return $currentstring;
+}
+
 # accessrule
 sub start_accessrule {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
@@ -540,9 +578,10 @@ sub start_body {
     # Breadcrumbs
     &Apache::lonhtmlcommon::clear_breadcrumbs();
     if ($env{'request.state'} eq 'construct') {
+        my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
         &Apache::lonhtmlcommon::add_breadcrumb({
-            'text'  => 'Construction Space',
-            'href'  => &Apache::loncommon::authorspace(),
+            'text'  => 'Authoring Space',
+            'href'  => &Apache::loncommon::authorspace($url),
         });
         &Apache::lonhtmlcommon::add_breadcrumb({
             'text'  => 'HTML Editor',
@@ -554,26 +593,34 @@ sub start_body {
         # FIXME Where are we?
     }
 
+        my $args = {'add_entries'    => $token->[2],
+                    'force_register' => 1,};
+        if ($target eq 'web') {
+            $args->{'print_suppress'} = 1;
+            if ($env{'request.use_absolute'}) {
+                $args->{'use_absolute'} = $env{'request.use_absolute'};
+            }
+        }
 	$currentstring = 
 	    &Apache::loncommon::start_page($Apache::londefdef::title,
 					   $Apache::londefdef::head
-					      .$extra_head,
-					   {'add_entries'    => $token->[2],
-#					    'no_title'       => 1,
-					    'force_register' => 1});
-
+					      .$extra_head,$args);
         my $header = '';
         if ($env{'request.state'} ne 'published' &&
             $env{'request.state'} ne 'construct') {
             $header=&Apache::lonmenu::constspaceform();
         }
         if ($env{'request.state'} ne 'published') {
-            $header.=&Apache::londefdef::edit_controls();
+            unless ($env{'form.inhibitmenu'} eq 'yes') {
+                $header.=&edit_controls();
+            }
         }
         if ($env{'request.state'} eq 'construct') {
-            $currentstring.=&Apache::loncommon::head_subbox(
-                                &Apache::loncommon::CSTR_pageheader()
-                               .$header);
+            unless ($env{'form.inhibitmenu'} eq 'yes') {
+                $currentstring.=&Apache::loncommon::head_subbox(
+                                    &Apache::loncommon::CSTR_pageheader()
+                                   .$header);
+            }
         } elsif ($env{'request.state'} eq 'edit') {
             $currentstring.=&Apache::loncommon::head_subbox($header);
         }
@@ -588,7 +635,7 @@ sub start_body {
 sub edit_controls {
     my ($nochgview) = @_;
     my $result .= '
-<form method="post">
+<form method="post" action="">
 <div class="LC_edit_problem_header">';
     unless ($nochgview) {
         $result .= '
@@ -600,7 +647,39 @@ sub edit_controls {
     $result .= '
 <div><input type="submit" name="editmode" accesskey="e" value="'.&mt('Edit').'" />';
     if (($env{'request.course.id'}) && ($env{'form.forceedit'})) {
-        $result .= ('&nbsp;' x 3).'<input type="button" value="'.&mt('Course View').'" onclick="javascript:location.href=currentURL" />';
+        my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
+        if ($url =~ /\.html?$/i) {
+            my ($cdom,$cnum);
+            if ($env{'request.course.id'}) {
+                $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                if ($env{'request.filename'} =~ m{/userfiles/supplemental/default|\d+/}) {
+                    if (&Apache::lonnet::is_course_upload($env{'request.filename'},
+                                                          $cnum,$cdom)) {
+                        &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+                                                                ['folderpath','title']);
+                    }
+                }
+            }
+            my ($symb,$itemtitle,$displayfile,$caller);
+            if ($url =~ m{^/uploaded/$cdom/$cnum/portfolio/syllabus/}) {
+                $itemtitle = &mt('Syllabus');
+                $caller = "/public/$cdom/$cnum/syllabus";
+            } else {
+                $caller = $url;
+                ($symb,$itemtitle,$displayfile) =
+                    &Apache::lonxml::get_courseupload_hierarchy($url,
+                                                                $env{'form.folderpath'},
+                                                                $env{'form.title'});
+            }
+            if (($symb ne '') || ($env{'httpref.'.$url} ne '') ||
+                ($url =~ m{^/uploaded/$cdom/$cnum/portfolio/syllabus/})) {
+                  $result .= ('&nbsp;' x 3).
+                             &Apache::lonhtmlcommon::dependencies_button()."\n".
+                             &Apache::lonhtmlcommon::dependencycheck_js($symb,
+                                 $itemtitle,$url,$env{'form.folderpath'},$caller)."\n";
+            }
+        }
     }
     $result .= '</div>
 </div>
@@ -741,7 +820,7 @@ sub end_h1 {
 	$currentstring .= $token->[2];
     } elsif ($target eq 'tex') {
 	my $post='\vskip 0 mm ';
-	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
 	if ($align eq 'center') {
 	    $post='\end{center}';
 	} elsif ($align eq 'left') {
@@ -1661,6 +1740,15 @@ sub start_a {
                     if (!&Apache::lonnet::allowed('bre',$linkurl)) {
                         if (&Apache::lonnet::is_on_map($url)) {
                             &Apache::lonxml::extlink($linkurl);
+                        } elsif ($env{'request.course.id'}) {
+                            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                            if ($linkurl =~ m{^([^/]|/uploaded/$cdom/$cnum/(docs|supplemental)/)}) {
+                                my $cleanhref = &clean_docs_httpref($linkurl,$url,$cdom,$cnum);
+                                if ($cleanhref) {
+                                    &Apache::lonxml::extlink($cleanhref);
+                                }
+                            }
                         }
                     }
                 }
@@ -1983,8 +2071,8 @@ sub end_dt {
 
 sub item_cleanup {
     my $item=&Apache::lonxml::endredirection();
-    $item=~s/\\begin{center}//g;
-    $item=~s/\\end{center}//g;
+    $item=~s/\\begin\{center}//g;
+    $item=~s/\\end\{center}//g;
     return $item;
 }
 
@@ -2038,9 +2126,6 @@ sub start_table {
     } elsif ($target eq 'tex') {
 	&disable_para();	# Can't have paras in a table.
 
-
-	#  New table code:
-
 	#  Get the parameters that we can do something about:
 
 	my $border = &Apache::lonxml::get_param('border', $parstack, $safeeval, undef, 0);
@@ -2057,15 +2142,23 @@ sub start_table {
 	if ((defined $border) && ($border > 0)) {
 	#    &Apache::lonnet::logthis("Turning on table borders: $border");
 	    $table->table_border(1);
-	    if ($cell_border ne 'none') {
-		$table->cell_border(1); # html specs that border turns on both...unless rules='none'.
+	    if (!defined $cell_border) {
+		$table->cell_border(1); # Default for rules is all if rules not defined.
 	    }
 	}
-	# Only all or nothing for cell borders for now:
 
-	if ((defined $cell_border) && ($cell_border ne 'none')) {
-	#    &Apache::lonnet::logthis("Turning on cell borders: $cell_border");
-	    $table->cell_border(1);
+	if ((defined $cell_border)) {
+	    if ($cell_border eq 'all') {
+		$table->cell_border(1);
+	    } elsif ($cell_border eq 'rows') {
+		$table->cell_border(2);
+	    } elsif ($cell_border eq 'cols') {
+		$table->cell_border(3);
+	    } elsif($cell_border eq 'groups') {
+		$table->cell_border(4);
+	    } else {
+		$table->cell_border(0);
+	    }
 	}
 	if (defined $theme) {
 	    $table->theme($theme);
@@ -2094,88 +2187,6 @@ sub start_table {
 	push(@Apache::londefdef::table, $table);
         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
 
-	#--------------------------------------------------------
-	#  Old table code here.
-	#--------------------------------------------------------
-
-
-	if (0) {
-	push(@Apache::londefdef::table, {}); 
-	$Apache::londefdef::table[-1]{'row_number'} = -1;
-        #maximum table's width (default coincides with text line length)
-	if ($#Apache::londefdef::table==0) {
-	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
-	    $textwidth=~/(\d+\.?\d*)/;
-	    $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
-	} else {
-	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
-		#the maximum width of nested table is determined by LATeX width of parent cell
-		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
-	    } else {
-              #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
-		$textwidth=$Apache::londefdef::table[-2]{'width'};
-		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
-		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
-		}
-	    }
-	}
-
-	# width either comes forced from the TeXwidth or the width parameters.
-	# in either case it can be a percentage or absolute width.
-	# in the width case we ignore absolute width 
-	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
-	if (!defined($TeXwidth)) {
-	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
-						       $safeeval,undef,1);
-	    if ($htmlwidth =~ /%/) {
-		$TeXwidth = $htmlwidth;
-	    } else { 
-		$TeXwidth = $textwidth;
-	    }
-	}
-	# if the width is specified as a % it is converted to an absolute width.
-	# otherwise.. just plugged right in the hash
-
-	if ($TeXwidth=~/%/) {
-	    $TeXwidth=~/(\d+)/;
-            $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
-	} else {
-	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
-	}
-        #  In the end, however the table width cannot be wider than $textwidth...
-	
-	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
-	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
-	}
-        #table's border
-	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 '; 
-	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
-	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
-	} else {
-	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
-	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
-	    $Apache::londefdef::table[-1]{'vvinc'} = '';
-	}
-	if ($#Apache::londefdef::table==0) {
-	    #    Note that \newline seems to destroy the alignment envs.
-	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
-	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
-	}
-	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
-        $Apache::londefdef::table[-1]{'TeXlen'}=[];
-        $Apache::londefdef::table[-1]{'objectlen'}=[];
-        $Apache::londefdef::table[-1]{'objectsignal'}=[];
-        $Apache::londefdef::table[-1]{'maxlen'}=[];
-        $Apache::londefdef::table[-1]{'minlen'}=[];
-        $Apache::londefdef::table[-1]{'content'}=[];
-        $Apache::londefdef::table[-1]{'align'}=[];
-        $currentstring.=' \keephidden{NEW TABLE ENTRY}';
-    }
-
     }
     return $currentstring;
 }
@@ -2188,8 +2199,6 @@ sub end_table {
     } elsif ($target eq 'tex') {
 	
 	
-	#  New table code:
-	
 	my $table = pop(@Apache::londefdef::table);
 	my $t     = $table->generate();
 	# &Apache::lonnet::logthis("Generating string");
@@ -2314,14 +2323,20 @@ sub tag_check {
 
 sub cell_config_hash {
     my ($align, $rowspan, $colspan, $width) = @_;
+    if ($rowspan ne '') {
+        $rowspan =~ s/^\s+|\s+$//g; 
+    }
+    if ($colspan ne '') {
+        $colspan =~ s/^\s+|\s+$//g;
+    }
     my %config;
     if ($align ne '') {
 	$config{'halign'} = $align;
     }
-    if ($colspan ne "") {
+    if (($colspan =~ /^\d+$/) && ($colspan > 0)) {
 	$config{'colspan'} = $colspan;
     }
-    if ($rowspan ne '') {
+    if (($rowspan =~ /^\d+$/) && ($rowspan > 0)) {
 	$config{'rowspan'} = $rowspan;
     }
     if ($width ne '') {
@@ -2746,7 +2761,9 @@ sub start_img {
 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
 	return '';
     }
-    &Apache::lonxml::extlink($src);
+    unless ($src =~ m{^data\:image/gif;base64,}) {
+        &Apache::lonxml::extlink($src);
+    }
     my $currentstring = '';
     my $scaling = .3;
 
@@ -2756,8 +2773,10 @@ sub start_img {
         my $enc = ('yes' eq 
                    lc(&Apache::lonxml::get_param('encrypturl',$parstack,
                       $safeeval)));
-        $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
-                         $enc);
+        unless ($src =~ m{^data\:image/gif;base64,}) {
+            $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
+                            $enc);
+        }
 
     # and render unto TeX that which is LaTeX
     } elsif ($target eq 'tex') {
@@ -2800,7 +2819,7 @@ sub start_img {
 
 	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
 
-	#if original bmp/gif/jpg/png file exist do following:
+	#if original bmp/gif/jpg/png/svg file exist do following:
 	my $origsrc=$src;
 	my ($path,$file) = &get_eps_image($src);
 	# &Apache::lonnet::logthis("Image source: $src result: $path $file");
@@ -2948,10 +2967,7 @@ sub start_applet {
     &Apache::lonxml::extlink($archive);
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
-        $currentstring = &Apache::lonenc::encrypt_ref($token,
-                                                      {'code'=>$code,
-                                                       'archive'=>$archive}
-                                                     );
+        $currentstring = $token->[4];
     } elsif ($target eq 'tex') {
         # Turn off some stuff we can't be inside thank you LaTeX
 
@@ -3037,22 +3053,47 @@ sub end_embed {
 #-- <param> tag (end tag forbidden)
 sub start_param {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-    if (&Apache::lonxml::get_param('name',$parstack,
-				   $safeeval,undef,1)=~/^cabbase$/i) {
+    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval,
+                                          undef,1);
+    if ($name =~/^cabbase$/i) {
 	my $value=&Apache::lonxml::get_param('value',$parstack,
 					     $safeeval,undef,1);
 	&Apache::lonxml::extlink($value);
-    } 
-  
+    } elsif ($name eq 'flashvars') {
+        if (lc(&Apache::lonxml::get_param('type',$parstack,$safeeval,-2,1))
+            eq 'application/x-shockwave-flash') {
+            my $launcher =
+                &Apache::lonxml::get_param('data',$parstack,$safeeval,-2,1);
+            if ($launcher) {
+                &Apache::lonxml::extlink($launcher);
+            }
+            my $flashvars=&Apache::lonxml::get_param('value',$parstack,
+                                                     $safeeval,undef,1);
+            if ($flashvars ne '') {
+                foreach my $item (split(/\&/,$flashvars)) {
+                    my ($key,$value)=split(/=/,$item,2);
+                    if ($key eq 'content') {
+                        if ($value ne '') {
+                            my ($dir) = ($launcher =~ m{(.+/)[^/]+$});
+                            &Apache::lonxml::extlink($dir.$value);
+                        }
+                    } elsif ($key eq 'thumb') {
+                        if ($value ne '') {
+                            &Apache::lonxml::extlink($value);
+                        }
+                    }
+                }
+            }
+        }
+    }
     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
-    &Apache::lonxml::extlink($src);
+    if ($src ne '') {
+        &Apache::lonxml::extlink($src);
+    }
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
 	my %toconvert;
-	my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
 	if ($src) { $toconvert{'src'}= $src; }
-	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
-					    undef,1);
 	if ($name=~/^cabbase$/i) {
 	    $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
 							   $safeeval,undef,1);
@@ -3417,7 +3458,7 @@ sub start_caption {
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
-    } 
+    }
     return $currentstring;
 }
 
@@ -3425,7 +3466,7 @@ sub end_caption {
     my ($target,$token) = @_;
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
-	$currentstring = $token->[2];    
+	$currentstring = $token->[2];
     } 
     return $currentstring;
 }
@@ -3449,13 +3490,34 @@ sub end_col {
     return $currentstring;
 }
 
-#-- <colgroup> tag (end tag optional)
+#-- <colgroup tag (end tag optional)
 sub start_colgroup {
-    my ($target,$token) = @_;
+    my ($target,$token,$tagstack, $parstack, $parser, $safeeval, $style) = @_;
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
     } 
+    if ($target eq 'tex') {
+	# TODO: Ensure this tag is in a table:
+
+	# Fetch the attributes and build the hash for the
+	# call to define_colgroup.
+
+	my $span    = &Apache::lonxml::get_param('span',   $parstack, $safeeval);
+	my $halign  = &Apache::lonxml::get_param('halign', $parstack, $safeeval);
+
+	my %colgroup_params;
+	if ($span ne '') {
+	    $colgroup_params{'span'} = $span;
+	}
+	if ($halign ne '') {
+	    $colgroup_params{'halign'} = $halign;
+	}
+	
+	my $table = $Apache::londefdef::table[-1];
+	$table->define_colgroup(\%colgroup_params);
+
+    }
     return $currentstring;
 }
 
@@ -3537,8 +3599,68 @@ sub start_iframe {
     my ($target,$token) = @_;
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
-	$currentstring = $token->[4];     
-    } 
+        my ($src,$url,$query);
+        if ($token->[2]->{'src'}) {
+            $src = $token->[2]->{'src'};
+        } elsif ($token->[2]->{'SRC'}) {
+            $src = $token->[2]->{'SRC'};
+        }
+        if ($src) {
+            ($url,$query) = ($src =~ /^([^?]+)\??([^?]*)$/);
+            if ($query =~ /inhibitmenu=yes/) {
+                $currentstring = $token->[4];
+            } else {
+                my $inhibit;
+                if ($url =~ m{^[^/.].*\.x?html?$}) {
+                    $inhibit = 1;
+                } elsif ($url =~ m{^/(uploaded|res)/.*\.x?html?$}) {
+                    $inhibit = 1;
+                }
+                if ($inhibit) {
+                    $currentstring = '<iframe ';
+                    foreach my $attrib (@{$token->[3]}) {
+                        if (lc($attrib) eq 'src') {
+                            if ($query) {
+                                $query.='&amp;inhibitmenu=yes';
+                            } else {
+                                $query = 'inhibitmenu=yes';
+                            } 
+                            $currentstring .= 'src="'.$url.'?'.$query.'" ';
+                        } else {
+                            $currentstring .= lc($attrib).'="'.$token->[2]->{$attrib}.'" ';
+                        }
+                    }
+                    $currentstring =~ s/\s+$//;
+                    if ($token->[4] =~ m{/>$}) {
+                        $currentstring .= ' />';
+                    } else {
+                        $currentstring .= '>';
+                    }
+                } else {
+                    $currentstring = $token->[4];
+                }
+            }
+            if (($url !~ m{^https?://}) && ($env{'request.course.id'})) {
+                my $docuri = &Apache::lonnet::hreflocation('',$env{'request.filename'});
+                my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                if ($url =~ m{^([^/]|/uploaded/)}) {
+                    my $cleanhref = &clean_docs_httpref($url,$docuri,$cdom,$cnum);
+                    if ($cleanhref) {
+                        &Apache::lonxml::extlink($cleanhref);
+                    }
+                } elsif (($url =~ m{/res/$LONCAPA::domain_re/}) && ($docuri =~ m{^\Q/uploaded/$cdom/$cnum/docs/\E})) {
+                    if (!&Apache::lonnet::allowed('bre',$url)) {
+                        if (&Apache::lonnet::is_on_map($url)) {
+                            &Apache::lonxml::extlink($url);
+                        }
+                    }
+                }
+            }
+        } else {
+            $currentstring = $token->[4];
+        }
+    }
     return $currentstring;
 }
 
@@ -3949,6 +4071,12 @@ sub start_tbody {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
     } 
+    if ($target eq 'tex') {
+	# TODO: Ensure this tag is within a table:
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_body();
+    }
     return $currentstring;
 }
 
@@ -3958,6 +4086,12 @@ sub end_tbody {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];    
     } 
+    if($target eq 'tex') {
+	# TODO: Ensure this tag is within a table:
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_body();
+    }
     return $currentstring;
 }
 
@@ -3968,6 +4102,11 @@ sub start_tfoot {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
     } 
+    if ($target eq 'tex') {
+        # TODO: ensure this is within a table tag.
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_foot();
+    }
     return $currentstring;
 }
 
@@ -3977,6 +4116,11 @@ sub end_tfoot {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];    
     } 
+    if ($target eq 'tex') {
+	#  TODO: Ensure this is in side a table 
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_foot();
+    }
     return $currentstring;
 }
 
@@ -3987,6 +4131,11 @@ sub start_thead {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
     } 
+    if ($target eq 'tex') {
+	# Assume we're in a table... TODO: Verify that and ignore tag if not.
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_head();
+    }
     return $currentstring;
 }
 
@@ -3996,6 +4145,12 @@ sub end_thead {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];    
     } 
+    if ($target eq 'tex') {
+     	# TODO: Verify we are in a table and ignore tag if not.
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_head();
+    }
     return $currentstring;
 }
 
@@ -4178,8 +4333,8 @@ sub get_eps_image {
 	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
     }
     &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
-    my ($spath, $sname, $sext) = &fileparse($src, qr/\.(bmp|gif|png|jpg|jpeg)/i);
-    $src=~s/\.(bmp|gif|png|jpg|jpeg)$/\.eps/i;
+    my ($spath, $sname, $sext) = &fileparse($src, qr/\.(bmp|gif|png|jpg|jpeg|svg)/i);
+    $src=~s/\.(bmp|gif|png|jpg|jpeg|svg)$/\.eps/i;
     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
     &Apache::lonxml::debug("Filelocation gives: $src");
     if (! -e $src) {
@@ -4206,7 +4361,7 @@ sub get_eps_image {
 		    close(FILE);
                 }
 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
-		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
+		$src=~s|/home/httpd/html/priv/[^/]+/([^/]*)/|/home/httpd/prtspool/$1/|;
 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
 		    $src =~ s/\.eps$/$sext.eps/;
 		}
@@ -4225,7 +4380,7 @@ sub get_eps_image {
 	print FILE "$src\n";
 	close FILE;
 	$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
-	$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
+	$src=~s|/home/httpd/html/priv/[^/]+/([^/]*)/|/home/httpd/prtspool/$1/|;
     }
     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
     $path =~ s/ /\_/g;
@@ -4244,7 +4399,7 @@ sub eps_generation {
     my $newsrc = $src;
     $newsrc =~ s/(\.bmp|\.gif|\.jpg|\.jpeg)$/\.eps/i;
     $newsrc=~s{/home/httpd/html/res}{};
-    $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
+    $newsrc=~s{/home/httpd/html/priv/[^/]+/($LONCAPA::username_re)/}{/$1/};
     $newsrc=~s{/\./}{/};
     $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
     if ($newsrc=~m{/home/httpd/lonUsers/}) {
@@ -4293,17 +4448,17 @@ sub LATEX_length {
     $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/(\\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/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^\{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
    $garbage=~s/(\\alpha|\\beta|\\gamma|\\delta|\\epsilon|\\verepsilon|\\zeta|\\eta|\\theta|\\vartheta|\\iota|\\kappa|\\lambda|\\mu|\\nu|\\xi|\\pi|\\varpi|\\rho|\\varrho|\\sigma|\\varsigma|\\tau|\\upsilon|\\phi|\\varphi|\\chi|\\psi|\\omega|\\Gamma|\\Delta|\\Theta|\\Lambda|\\Xi|\\Pi|\\Sigma|\\Upsilon|\\Phi|\\Psi|\\Omega)/1/g;
     $garbage=~s/(\\pm|\\mp|\\times|\\div|\\cdot|\\ast|\\star|\\dagger|\\ddagger|\\amalg|\\cap|\\cup|\\uplus|\\sqcap|\\sqcup|\\vee|\\wedge|\\oplus|\\ominus|\\otimes|\\circ|\\bullet|\\diamond|\\lhd|\\rhd|\\unlhd|\\unrhd|\\oslash|\\odot|\\bigcirc|\\Box|\\Diamond|\\bigtriangleup|\\bigtriangledown|\\triangleleft|\\triangleright|\\setminus|\\wr)/1/g;
     $garbage=~s/(\\le|\\ll|\\leq|\\ge|\\geq|\\gg|\\neq|\\doreq|\\sim|\\simeq|\\subset|\\subseteq|\\sqsubset|\\sqsubseteq|\\in|\\vdash|\\models|\\supset|\\supseteq|\\sqsupset|\\sqsupseteq|\\ni|\\dash|\\perp|\\approx|\\cong|\\equiv|\\propto|\\prec|\\preceq|\\parallel|\\asymp|\\smile|\\frown|\\bowtie|\\succ|\\succeq|\\mid)/1/g;
     $garbage=~s/(\\not<|\\\\not\\le|\\not\\prec|\\not\\preceq|\\not\\subset|\\not\\subseteq|\\not\\sqsubseteq|\\not\\in|\\not>|\\not\\ge|\\not\\succ|\\notsucceq|\\not\\supset|\\notsupseteq|\\not\\sqsupseteq|\\notin|\\not=|\\not\\equiv|\\not\\sim|\\not\\simeq|\\not\\approx|\\not\\cong|\\not\\asymp)/1/g;
     $garbage=~s/(\\leftarrow|\\gets|\\Leftarrow|\\rightarrow|\\to|\\Rightarrow|\\leftrightarrow|\\Leftrightarrow|\\mapsto|\\hookleftarrow|\\leftharpoonup|\\leftkarpoondown|\\rightleftharpoons|\\longleftarrow|\\Longleftarrow|\\longrightarrow|\\Longrightarrow|\\longleftrightarrow|\\Longleftrightarrow|\\longmapsto|\\hookrightarrow|\\rightharpoonup|\\rightharpoondown|\\uparrow|\\Uparrow|\\downarrow|\\Downarrow|\\updownarrow|\\Updownarrow|\\nearrow|\\searrow|\\swarrow|\\nwarrow)/11/g;
     $garbage=~s/(\\aleph|\\hbar|\\imath|\\jmath|\\ell|\\wp|\\Re|\\Im|\\mho|\\prime|\\emptyset|\\nabla|\\surd|\\partial|\\top|\\bot|\\vdash|\\dashv|\\forall|\\exists|\\neg|\\flat|\\natural|\\sharp|\\\||\\angle|\\backslash|\\Box|\\Diamond|\\triangle|\\clubsuit|\\diamondsuit|\\heartsuit|\\spadesuit|\\Join|\\infty)/11/g;
-    $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
+    $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*)|$2|g;	 	 
@@ -4405,40 +4560,34 @@ sub latex_header {
 	($mode eq 'batchmode')) {$currentstring .='\batchmode';} 
     $currentstring .= '\newcommand{\keephidden}[1]{}'.
 	'\renewcommand{\deg}{$^{\circ}$}'.
-	'\usepackage{multirow}'.
-	'\usepackage{longtable}'.
-	'\usepackage{textcomp}'.
-	'\usepackage{makeidx}'.
-	'\usepackage[dvips]{graphicx}'.
-	'\usepackage{wrapfig}'.
-	'\usepackage{picins}'.
+	'\usepackage{multirow}'."\n".
+	'\usepackage{longtable}'."\n".
+	'\usepackage{textcomp}'."\n".
+	'\usepackage{makeidx}'."\n".
+	'\usepackage[dvips]{graphicx}'."\n".
+	'\usepackage{wrapfig}'."\n".
+	'\usepackage{picins}'."\n".
 	'\usepackage[T1]{fontenc}'."\n".
 	'\usepackage{lmodern}'."\n".
 	'\usepackage[postscript]{ucs}'."\n".
 	'\usepackage[utf8x]{inputenc}'."\n".
-	'\usepackage{pifont}' ."\n".
+	'\usepackage{pifont}'."\n".
 	'\usepackage{latexsym}'."\n".
-	'\usepackage{epsfig}'.
-	"\\usepackage{xtab}\n".
-	"\\usepackage{tabularx}\n".
-	"\\usepackage{booktabs}\n".
-	"\\usepackage{array}\n".
-	"\\usepackage{colortbl}\n".
-	"\\usepackage{xcolor}\n".
-	'\usepackage{calc}'.
-	'\usepackage{amsmath}'.
-    '\usepackage{soul}',
-	'\usepackage{amssymb}'.
-	'\usepackage{amsfonts}'.
-	'\usepackage{amsthm}'.
-	'\usepackage{amscd}'
-        .'\usepackage{picins}\usepackage{calc}'."\n". # From lonprintout.pm
-	'\usepackage[T1]{fontenc}'."\n".
-	'\usepackage{lmodern}'."\n".
-	'\usepackage[postscript]{ucs}'."\n".
-	'\usepackage[utf8x]{inputenc}'."\n".
-	'\usepackage{pifont}'  . "\n";
-	
+	'\usepackage{epsfig}'."\n".
+	'\usepackage{xtab}'."\n".
+	'\usepackage{tabularx}'."\n".
+	'\usepackage{booktabs}'."\n".
+	'\usepackage{array}'."\n".
+	'\usepackage{colortbl}'."\n".
+	'\usepackage{xcolor}'."\n".
+	'\usepackage{calc}'."\n".
+	'\usepackage{amsmath}'."\n".
+	'\usepackage{soul}'."\n".
+	'\usepackage{amssymb}'."\n".
+	'\usepackage{amsfonts}'."\n".
+	'\usepackage{amsthm}'."\n".
+	'\usepackage{amscd}'."\n".
+	'\usepackage{actuarialangle}'."\n";
     if($env{'form.pdfFormFields'} eq 'yes') {
 	$currentstring .= '\usepackage{hyperref}'.
 	    '\usepackage{eforms}'.
@@ -4453,6 +4602,62 @@ sub latex_header {
 
 }
 
+sub clean_docs_httpref {
+    my ($href,$docuri,$cdom,$cnum) = @_;
+    if ($docuri eq '') {
+        $docuri = &Apache::lonnet::hreflocation('',$env{'request.filename'});
+    }
+    if ($cdom eq '') {
+        $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    }
+    if ($cnum eq '') {
+        $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+    }
+    my $cleanhref;
+    if ($docuri =~ m{^(\Q/uploaded/$cdom/$cnum/\E(?:docs|supplemental)/)(.+/)[^/]+$}) {
+        my $prefix = $1;
+        my $relpath = $2;
+        my ($hrefpath,$fname);
+        if ($href =~ m{^/}) {
+            if ($href =~ m{^\Q$prefix\E(.+/)([^/]+)$}) {
+                $hrefpath = $1;
+                $fname = $2;
+            } else {
+                return $cleanhref;
+            }
+        } else {
+            if ($href =~ m{/}) {  
+                (my $path,$fname) = ($href =~ m{^(.*)/([^/]*)$});
+                $hrefpath = $relpath.$path;
+                if ($path eq '') {
+                    $hrefpath =~ s{/$}{};
+                }
+            } else {
+                $fname = $href;
+                $hrefpath = $relpath;
+                $hrefpath =~ s{/$}{};
+            }
+        }
+        if ($fname ne '') {
+            my $cleanrelpath;
+            foreach my $dir (split(/\//,$hrefpath)) {
+                next if ($dir eq '.');
+                if ($dir eq '..') {
+                    $cleanrelpath =~ s{([^/]+/)$}{};
+                } else {
+                    $cleanrelpath .= $dir.'/';
+                }
+            }
+            if ($cleanrelpath ne '') {
+                $cleanhref = $prefix.$cleanrelpath.$fname;
+            } else {
+                $cleanhref = $prefix.$fname;
+            }
+        }
+    }
+    return $cleanhref;
+}
+
 =pod
 
 =head1 NAME
@@ -4547,7 +4752,23 @@ described at http://www.lon-capa.org.
      	   I'm in a table....
      	}
 
-
+=item clean_docs_httpref($href,$docuri,$cdom,$cnum)
+        HTML pages uploaded to a course which contain dependencies either from iframes,
+        javascript files or objects (FlashPlayerSwf, MediaSrc, XMPSrc, ConfigurationSrc,
+        and PosterImageSrc) for which dependency is another file uploaded to the same
+        course.
+
+        Required input: 
+        href - dependency (either a relative URL, or an absolute URL)
+        Optional inputs:
+        docuri - URL of HTML page containing the dependency
+        cdom - Course domain
+        cnum - CourseID
+
+        Output:
+        returns an absolute URL constructed from the href provided, and the calling context.
+        (this will be null, if the URL does not begin: /uploaded/$cdom/$cnum/docs/ or
+        /uploaded/$cdom/$cnum/supplemental/).
 
 =back