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From: Luc Teirlinck <teirllm@dms.auburn.edu>
Cc: david.ponce@wanadoo.fr, emacs-devel@gnu.org
Subject: Re: Shift Tab should move backward in help buffers
Date: Sun, 26 Jun 2005 13:03:13 -0500 (CDT)	[thread overview]
Message-ID: <200506261803.j5QI3Dv17974@raven.dms.auburn.edu> (raw)
In-Reply-To: <42BEE64C.4040405@student.lu.se> (message from Lennart Borgman on Sun, 26 Jun 2005 19:30:52 +0200)

Lennart Borgman wrote:

   Luc Teirlinck wrote:

   >And it would be useful to have a keybinding that works by default,
   >even when not using a window system.  <S-tab> does not; by default, it
   >usually gets translated into <tab>, so it moves forward, not backward.
   >  
   >
   Is the problem that Emacs can not see <S-tab> on all systems?

The problem is this, form `(elisp)Character Type':

     The case of a graphic character is indicated by its character code;
  for example, ASCII distinguishes between the characters `a' and `A'.
  But ASCII has no way to represent whether a control character is upper
  case or lower case.  Emacs uses the 2**25 bit to indicate that the
  shift key was used in typing a control character.  This distinction is
  possible only when you use X terminals or other special terminals;
  ordinary terminals do not report the distinction to the computer in any way.

and, from `(emacs)Named ASCII Chars':

     With an ordinary ASCII terminal, there is no way to distinguish
  between <TAB> and `C-i' (and likewise for other such pairs), because
  the terminal sends the same character in both cases.

So, from the console and from `emacs -nw', <tab>, <S-tab>, C-i and
S-C-i are indistinguishable.

`emacs -nw' is important to people with a slow connection, because
just emacs without `-nw' over a slow connection is just way to slow to
be usable.

Sincerely,

Luc.

  reply	other threads:[~2005-06-26 18:03 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-06-26 13:51 Shift Tab should move backward in help buffers Lennart Borgman
2005-06-26 16:30 ` David Hunter
2005-06-26 16:55   ` David Ponce
2005-06-26 17:13     ` Luc Teirlinck
2005-06-26 17:30       ` Lennart Borgman
2005-06-26 18:03         ` Luc Teirlinck [this message]
2005-06-26 18:57           ` Andreas Schwab
2005-06-27  4:39             ` David Hunter
2005-06-27  6:16               ` Miles Bader
2005-06-28  1:03                 ` David Hunter
2005-06-28  1:28                   ` Miles Bader
2005-06-26 17:13     ` Lennart Borgman
2005-06-27  2:08       ` Miles Bader
2005-06-27  4:47     ` David Hunter
2005-06-26 22:42 ` Richard M. Stallman
2005-06-27  9:30   ` Jason Rumney
2005-06-27 10:00     ` Miles Bader
2005-06-28  4:16     ` Richard M. Stallman
2005-06-28  5:15       ` Miles Bader
2005-06-28  6:27         ` Stefan Monnier
2005-06-28  6:41           ` Miles Bader
2005-06-28  6:52             ` Stefan Monnier
2005-06-28  8:53           ` Andreas Schwab
2005-06-28 20:44             ` Miles Bader
2005-06-28 21:29         ` Richard M. Stallman
2005-06-28 22:39           ` Miles Bader
2005-07-02  0:23             ` David Hunter
  -- strict thread matches above, loose matches on Subject: below --
2005-06-27  6:24 David PONCE
2005-06-28  1:50 ` David Hunter
2005-06-28  8:42 LENNART BORGMAN
2005-06-28 19:42 ` Eli Zaretskii

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