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author | Alan Mackenzie <acm@muc.de> | 2022-05-08 11:39:45 +0000 |
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committer | Alan Mackenzie <acm@muc.de> | 2022-05-08 11:39:45 +0000 |
commit | 1d012e0a621f9cf99048f57130144275b9025d1c (patch) | |
tree | 12ac5db012101035c21492b7458e7496f1843e9b | |
parent | e683b08b3fbbc1692e0053699c5cf2b7cbc803f6 (diff) | |
download | emacs-1d012e0a621f9cf99048f57130144275b9025d1c.tar.gz |
Linux console: don't translate ESC TAB to `backtab' in input-decode-map.
This translation happened after the terminfo entry for <shift>TAB in the linux
section was changed to kcbt=\E^I in ncurses version 6.3.
* lisp/term/linux.el (terminal-init-linux): Add a define-key form to remove
the entry for "\e\t" from input-decode-map.
* etc/PROBLEMS: Add a new section under "character terminals" about S-TAB
wrongly doing the same thing as M-TAB, giving tips about amending the Linux
keyboard layout.
-rw-r--r-- | etc/PROBLEMS | 27 | ||||
-rw-r--r-- | lisp/term/linux.el | 4 |
2 files changed, 31 insertions, 0 deletions
diff --git a/etc/PROBLEMS b/etc/PROBLEMS index 2a26dfaec4d..8a260c3177c 100644 --- a/etc/PROBLEMS +++ b/etc/PROBLEMS @@ -1736,6 +1736,33 @@ this, you can remove the X resource or put this in your init file: (xterm-remove-modify-other-keys) +** The shift TAB key combination works as meta TAB on a Linux console. + +This happens because on your keyboard layout, S-TAB produces the same +keycodes as typing ESC TAB individually. The best way to solve this +is to modify your keyboard layout to produce different codes, and tell +Emacs what these new codes mean. + +The current keyboard layout will probably be a .map.gz file somewhere +under /usr/share/keymaps. Identify this file, possibly from a system +initialization file such as /etc/conf.d/keymaps. Run gunzip on it to +decompress it, and amend the entries for keycode 15 to look something +like this: + +keycode 15 = Tab + alt keycode 15 = Meta_Tab + shift keycode 15 = F219 +string F219 = "\033[4}\011" # Shift+<tab> + +After possibly saving this file under a different name, compress it +again using gzip. Amend /etc/conf.d/keyamps, etc., if needed. +Further details can be found in the man page for loadkeys. + +Then add the following line near the start of your site-start.el or +.emacs or init.el file: + +(define-key input-decode-map "\e[4}\t" 'backtab) + ** Emacs spontaneously displays "I-search: " at the bottom of the screen. This means that Control-S/Control-Q (XON/XOFF) "flow control" is being diff --git a/lisp/term/linux.el b/lisp/term/linux.el index 6d43e477ac9..ab5a6d8698f 100644 --- a/lisp/term/linux.el +++ b/lisp/term/linux.el @@ -17,6 +17,10 @@ (ignore-errors (when gpm-mouse-mode (require 't-mouse) (gpm-mouse-enable))) + ;; Don't translate ESC TAB to backtab as directed + ;; by ncurses-6.3. + (define-key input-decode-map "\e\t" nil) + ;; Make Latin-1 input characters work, too. ;; Meta will continue to work, because the kernel ;; turns that into Escape. |