--- loncom/xml/lonxml.pm	2002/07/29 22:06:38	1.186
+++ loncom/xml/lonxml.pm	2002/10/08 17:09:09	1.199
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.186 2002/07/29 22:06:38 www Exp $
+# $Id: lonxml.pm,v 1.199 2002/10/08 17:09:09 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -99,6 +99,7 @@ use Apache::edit();
 use Apache::lonnet();
 use Apache::File();
 use Apache::loncommon();
+use Apache::lonfeedback();
 
 #==================================================   Main subroutine: xmlparse  
 #debugging control, to turn on debugging modify the correct handler
@@ -154,6 +155,7 @@ sub xmlbegin {
 }
 
 sub xmlend {
+    my ($discussiononly,$symb)=@_;
     my $discussion='';
     if ($ENV{'request.course.id'}) {
        my $crs='/'.$ENV{'request.course.id'};
@@ -162,14 +164,18 @@ sub xmlend {
        }                 
        $crs=~s/\_/\//g;
        my $seeid=&Apache::lonnet::allowed('rin',$crs);
-       my $symb=&Apache::lonnet::symbread();
+       unless ($symb) {
+           $symb=&Apache::lonnet::symbread();
+       }
        if ($symb) {
           my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
                      $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
 		     $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
           if ($contrib{'version'}) {
-              $discussion.=
-                  '<address><hr /><h2>Course Discussion of Resource</h2>';
+              unless ($discussiononly) {
+                 $discussion.=
+                  '<address><hr />';
+	     }
               my $idx;
               for ($idx=1;$idx<=$contrib{'version'};$idx++) {
 		my $hidden=($contrib{'hidden'}=~/\.$idx\./);
@@ -181,14 +187,24 @@ sub xmlend {
                   if ($hidden) {
 		      $message='<font color="#888888">'.$message.'</font>';
                   }
+                  my $screenname=&Apache::loncommon::screenname(
+                               $contrib{$idx.':sendername'},
+			       $contrib{$idx.':senderdomain'});
+                  my $plainname=&Apache::loncommon::nickname(
+                               $contrib{$idx.':sendername'},
+			       $contrib{$idx.':senderdomain'});
+
                   my $sender='Anonymous';
                   if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
-                      $sender=$contrib{$idx.':plainname'}.' ('.
+                      $sender=&Apache::loncommon::aboutmewrapper(
+                               $plainname,
+                               $contrib{$idx.':sendername'},
+                               $contrib{$idx.':senderdomain'}).' ('.
                               $contrib{$idx.':sendername'}.' at '.
 		      $contrib{$idx.':senderdomain'}.')';
                       if ($contrib{$idx.':anonymous'}) {
 			  $sender.=' [anonymous] '.
-                                     $contrib{$idx.':screenname'};
+                                     $screenname;
                       }
                       if ($seeid) {
 			  if ($hidden) {
@@ -200,8 +216,8 @@ sub xmlend {
 			  }
                       }                   
                   } else {
-                      if ($contrib{$idx.':screenname'}) {
-			  $sender='<i>'.$contrib{$idx.':screenname'}.'</i>';
+                      if ($screenname) {
+			  $sender='<i>'.$screenname.'</i>';
                       }
                   }
 		  $discussion.='<p><b>'.$sender.'</b> ('.
@@ -211,11 +227,28 @@ sub xmlend {
 	        }
                } 
               }
-              $discussion.='</address>';
+              unless ($discussiononly) {
+                 $discussion.='</address>';
+	      }
+          }
+          if ($discussiononly) {
+	      $discussion.=(<<ENDDISCUSS);
+<form action="/adm/feedback" method="post" name="mailform">
+<input type="submit" name="discuss" value="Post Discussion" />
+<input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
+<input type="hidden" name="symb" value="$symb" />
+<input type="hidden" name="sendit" value="true" />
+<br />
+<font size="1">Note: in anonymous discussion, your name is visible only to
+course faculty</font><br />
+<textarea name=comment cols=60 rows=10 wrap=hard></textarea>
+</form>
+ENDDISCUSS
+             $discussion.=&Apache::lonfeedback::generate_preview_button();
           }
        }
     }
-    return $discussion.'</html>';
+    return $discussion.($discussiononly?'':'</html>');
 }
 
 sub tokeninputfield {
@@ -332,8 +365,10 @@ sub registerurl {
     my $forcereg=shift;
     my $target = shift;
     my $result = '';
+    
     if ($target eq 'edit') {
-        $result .="<script>\n    menu.currentURL=null;\n".
+        $result .="<script>\n".
+            "if (typeof menu != 'undefined') {menu.currentURL=null;}\n".
             &Apache::loncommon::browser_and_searcher_javascript().
                 "\n</script>\n";
     }
@@ -538,6 +573,26 @@ sub htmlclean {
     return $output;
 }
 
+sub latex_special_symbols {
+    my ($current_token,$stack,$parstack)=@_;
+    $current_token=~s/\\/\\char92 /g;
+    $current_token=~s/\^/\\char94 /g;
+    $current_token=~s/\~/\\char126 /g;
+    $current_token=~s/(&[^a-z\#])/\\$1/g;
+    if ($current_token=~/ \#\w/) {
+	$current_token=~s/ \#(\w)/ \\#$1/;
+    } else {
+	$current_token=~s/([^&])(\#)/$1\\$2/g;
+    }
+    $current_token=~s/(\$|_|{|})/\\$1/g;
+    $current_token=~s/\\char92 /\\texttt{\\char92}/g;
+    $current_token=~s/>/\$>\$/g; #more
+    $current_token=~s/</\$<\$/g; #less
+    if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
+    if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
+    return $current_token;
+}
+
 sub inner_xmlparse {
   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
   my $finaloutput = '';
@@ -547,19 +602,12 @@ sub inner_xmlparse {
     while ($token = $$pars['-1']->get_token) {
       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
 	if ($metamode<1) {
-	    if ($target eq 'tex') {
-		my @temp_array = @$stack;
-		if ($temp_array[-1] ne 'm') {
-		    if ($temp_array[-1] ne 'tt') {
-			if ($token->[1]=~m/\^/) {$token->[1]=~s/\^/\\verb|\^|/g;}
-		    } else {
-			if ($token->[1]=~m/\^/) {$token->[1]=~s/\^/}\\verb|\^|{/g;}
-		    }
-		    if ($token->[1]=~m/>/) {$token->[1]=~s/>/\$>\$/g;}
-		    if ($token->[1]=~m/</) {$token->[1]=~s/</\$<\$/g;}
-		}
+	    my $text=$token->[1];
+	    if ($token->[0] eq 'C' && $target eq 'tex') {
+		$text = '%'.$text;
+		$text =~ s/[\n\r]//g;
 	    }
-	  $result.=$token->[1];
+	    $result.=$text;
 	}
       } elsif ($token->[0] eq 'PI') {
 	if ($metamode<1) {
@@ -622,6 +670,12 @@ sub inner_xmlparse {
 	  $result= &Apache::run::evaluate($result,$safeeval,'');
 	}
       }
+      if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
+	if ($target eq 'tex') {
+	    $result=&latex_special_symbols($result,$stack,$parstack);
+	}
+      }
+
       # Encode any high ASCII characters
       if (!$Apache::lonxml::prevent_entity_encode) {
 	$result=&HTML::Entities::encode($result,"\200-\377");
@@ -748,13 +802,13 @@ sub callsub {
     }
     if (!$deleted) {
       if ($space) {
-	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
+	&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
 	$sub1="$space\:\:$sub";
 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
 					     $parstack,$parser,$safeeval,
 					     $style);
       } else {
-	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
+	&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
 	if ($metamode <1) {
 	  if (defined($token->[4]) && ($metamode < 1)) {
 	    $currentstring = $token->[4];
@@ -947,6 +1001,7 @@ sub decreasedepth {
 }
 
 sub get_all_text_unbalanced {
+#there is a copy of this in lonpublisher.pm
  my($tag,$pars)= @_;
  my $token;
  my $result='';