Re: pkg/41423: CenterIM unusable: ignores several keys (like enter)

["Volkmar Seifert" <vs%nifelheim.info@localhost>]

The following reply was made to PR pkg/41423; it has been noted by GNATS.

From: "Volkmar Seifert" <vs%nifelheim.info@localhost>
To: jdc%netbsd.org@localhost
Cc: gnats-bugs%netbsd.org@localhost, pkgsrc-bugs%netbsd.org@localhost
Subject: Re: pkg/41423: CenterIM unusable: ignores several keys (like enter)
Date: Sat, 23 May 2009 00:05:56 +0200 (CEST)

 Hi,
 
 
 >> That's an interesting new behavior I haven't seen, yet. libcurses, I
 >> guess?
 >
 > Yes.  I am doing all my tests with NetBSD's libcurses.
 
 Ah ok. Well, in the end, it should not really matter. I haven't got it to
 work with base's curses, thus the INCOMPAT-line and ncurses.
 
 
 > The white on white behaviour is a centerim bug - it sets the highlighted
 >  items to be white foreground and default (i.e. whatever the terminal is
 >  set to) background colours.  As I use white background, I get white on
 >  white ;-)
 
 he he, ok. Well, if it's just that, I don't care: work-around "use
 different bg-color" is easily done :)
 
 
 > Thanks for checking.  At least the versions of CenterIM are consistent.
 
 If I can help, I'll do it :)
 And yes, it looks quite consistent.
 
 
 > I have narrowed down the problem further.  For some reason, when we call
 >  getchar() from the curses library (src/lib/libcurses/getch.c:602), it
 > returns -1 for the second character in an escape sequence (e.g. left
 > arrow is the three characters <esc> O D when using an xterm).  This
 > causes the parsing in "assembling a key sequence" state to abort.  (The
 > other characters in the escape sequence are read after the extra -1.)
 > Also, as I mentioned previously, if I slow everything down by using a
 > curses library with enough debug enabled, we read the key sequences for
 > the arrow keys without a problem.
 >
 > I will see if I can spot why getchar() is returning -1.
 
 Now that you are mentioning terminal-types like xterm...I tried different
 $TERM values, e.g. vt100 and xterm, and the behavior of the keys never
 changed. I don't know if this information is helpful, but since I tried
 that, I thought it couldn't hurt being mentioned :)
 
 best regards
 
 - Volkmar
 
 -- 
 http://blog.nifelheim.info/tech