--- loncom/homework/structuretags.pm	2003/07/16 19:36:02	1.196
+++ loncom/homework/structuretags.pm	2003/07/25 10:44:36	1.199
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.196 2003/07/16 19:36:02 www Exp $
+# $Id: structuretags.pm,v 1.199 2003/07/25 10:44:36 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -39,7 +39,7 @@ use Apache::lonmenu;
 
 BEGIN {
     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext',
-'simpleeditbutton'));
+'simpleeditbutton','definetag'));
 }
 
 sub start_web {
@@ -57,12 +57,15 @@ sub end_web {
 
 sub start_tex {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    if (!($target eq 'tex' || $target eq 'edit' || $target eq 'modified' ||
+    my $result='';
+    if (!($target eq 'edit' || $target eq 'modified' ||
 	  $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
 	&Apache::lonxml::debug("tex 1");
 	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
+    } elsif ($target eq 'tex') {
+	$result=&Apache::lonxml::get_all_text("/tex",$parser);
     }
-    return '';
+    return $result;;
 }
 
 sub end_tex {
@@ -91,6 +94,7 @@ sub page_start {
 	    'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
 	my $background=&Apache::lonxml::get_param('background',$parstack,
 						  $safeeval);
+	if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }
 	if ($background) {
 	    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
 		$background;
@@ -98,12 +102,15 @@ sub page_start {
 	} else {
 	    my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
 						   $safeeval);
-	    if ($bgcolor) {
+	    if (($bgcolor) && ($ENV{'browser.blackwhite'} ne 'on')) {
 		$body_tag_start.='bgcolor="'.$bgcolor.'" ';
 	    } else {
 		$body_tag_start.='bgcolor="#ffffff"';
 	    }
 	}
+	if ($ENV{'browser.fontenhance'} eq 'on') {
+	    $body_tag_start.=' style="font-size: x-large;" ';
+	}
 	$body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
 	if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
 	    my ($symb,undef,undef,undef,$publicuser)=
@@ -596,6 +603,30 @@ sub end_library {
     return $result;
 }
 
+sub start_definetag {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+
+    my $result;
+
+    my $name = $token->[2]->{'name'};
+    my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
+    if ($name=~/^\//) {
+	$result=
+ '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
+    } else {
+	$result=
+ '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
+    }
+    $skip=~s/\</\&lt\;/gs;
+    $skip=~s/\>/\&gt\;/gs;
+    $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
+    return $result;
+}
+
+sub end_definetag {
+    return '';
+}
+
 sub start_block {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;