[Bug 10976] vi may lose ESCape key input

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10976

Denys Vlasenko <vda.linux at googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #5 from Denys Vlasenko <vda.linux at googlemail.com> ---
(In reply to Mike Berger from comment #4)
> I think silently dropping all buffered input when an invalid ESC sequence is seen is a bug.

It's intended. I coded that myself. I got sick and tired of having accidental
presses of unrecognized keys (e.g. Ctrl-Shift-key) resulting in unexpected
actions. I prefer when in this case nothing happens.


> 1. Silently drop the ESC and continue processing the following character as if the ESC had not been received.

I don't think it's good. See above.


> 3. Mimic the behavior of read_key() if no input had been buffered.  Return the ESC, and continue processing the following character as if the ESC had not been received.

I don't think it's good. See above.


> 2. Silently drop the ESC and the following invalid key.  Continue processing as if the ESC-<bad> had not been received.

This is what happens now, right? The entire sequence is ignored.

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