Comments (4)
Unfortunately this behavior depends almost entirely on your terminal emulator of choice and the active termcap settings; to see what I mean you might consider trying different terminal emulators and different modifier key combinations.
In the particular case of C-m
and Enter
, the value for C-m
is equivalent to Enter
so there isn't a way to distinguish. This is also true of Tab
and C-i
. So from that perspective, seeing KEnter
when C-m
is pressed is expected behavior.
As examples of this kind of behavior, these pages might be illuminating:
http://askubuntu.com/questions/441744/pressing-enter-produces-m-instead-of-a-newline
http://stackoverflow.com/questions/598113/can-terminals-detect-shift-enter-or-control-enter
Sadly, terminal application programmers typically need to select control-key combinations that are likely to work on a wide variety of terminal emulators to avoid this problem.
from brick.
Sad indeed. Thanks for the heads up.
from brick.
Thanks for looking into this.
Regarding the key mapping - aren't key mappings in some database so applications know what to expect on which terminal?
If not how is anything ever supposed to work on a terminal?
Or is that why vi uses key sequences rather than modifiers most of the time?
Because the modifiers break?
from brick.
@hramrach - yes, termcap
is the database you mentioned. Still, that is not necessarily enough to make this work for all emulators and all modifier key combinations. It might be something that @coreyoconnor could address by making changes to vty
(which brick
uses to handle keyboard input events), though.
from brick.
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