[vim/vim] `<C-[>` still broken for certain Cyrillic keyboard layouts (Issue #14272)

wildekat

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Mar 22, 2024, 3:27:19 PM3/22/24

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Steps to reproduce

Run gvim -u NONE
Enter Insert mode
Switch to Russian (I'm using the standard/most common ЙЦУКЕН keyboard layout)
Press Ctrl+Cyrillic letter х to attempt to exit Insert mode
Observe how nothing happens

Expected behaviour

Before Vim-8.2.4807, <C-х> was fully equivalent to <C-[> / <Esc>, in any mode ([ and Х are one and the same key).

Version of Vim

9.1.0181

Environment

OS: Windows 10
$TERM: N/A
On Windows, the issue is only present in gVim and does not seem to affect console Vim at all.

Logs and stack traces

No response

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Restorer

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Mar 23, 2024, 5:45:24 AM3/23/24

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Please take a look here and here.

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wildekat

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Mar 23, 2024, 7:53:24 AM3/23/24

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@RestorerZ
Thanks, I've been through those threads and a number of other similar ones.

If I were to set set_keycode_trans_strategy to experimental, that would also require setting up hundreds of explicit <C-*> mappings: <C-ц> would have to be mapped to <C-w>, <C-г> to <C-u> and so on. Clearly that's not the way to go.

The problem with set_keycode_trans_strategy == classic is that it does not quite restore the old (pre-8.2.4807) behavior: in this mode, <C-х> basically does not exist, so you cannot even map it meaningfully (but thankfully all the other Ctrl+Cyrillic letter combinations seem to work out of the box).

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wildekat

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Mar 23, 2024, 10:14:50 AM3/23/24

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Sorry, my bad. It turns out <C-х> does NOT work in Vim-8.

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wildekat

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Mar 23, 2024, 10:14:51 AM3/23/24

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Closed #14272 as completed.

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Anton Sharonov (ant0sha)

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Mar 23, 2024, 10:52:57 AM3/23/24

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Question is, if it is meaningful feature request then...

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wildekat

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Mar 23, 2024, 11:24:45 AM3/23/24

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I for one would very much like to see this implemented.
One can actually map <C-х> to <C-[> under set_keycode_trans_strategy = experimental, but for that solution to be viable, we would need an equivalent of langmap for Ctrl key bindings.

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Jefri Reynaldi

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Mar 24, 2024, 2:44:40 AM3/24/24

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Steps to reproduce

1. Run `gvim -u NONE`

2. Enter Insert mode

3. Switch to Russian (I'm using the standard/most common [ЙЦУКЕН keyboard layout](https://en.wikipedia.org/wiki/JCUKEN))

4. Press `Ctrl+Cyrillic letter х` to attempt to exit Insert mode

5. Observe how nothing happens

Expected behaviour

Before Vim-8.2.4807, <C-х> was fully equivalent to <C-[> / <Esc>, in any mode ([ and Х are one and the same key).

Version of Vim

9.1.0181

Environment

OS: Windows 10 $TERM: N/A On Windows, the issue is only present in gVim and does not seem to affect console Vim at all.

Logs and stack traces

No response

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Anton Sharonov (ant0sha)

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Mar 24, 2024, 7:45:45 AM3/24/24

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Thanks to @RestorerZ explanations in PR #14277, right way to
solve this issue seems to be to modify slightly the standard RU
keyboard layout.

Using MSFT "Keyboard Layout Creator" I created custom RU layout
(it is possible to load the existing layout as the starting
point), modified it so that the "small russian ha" (aka VK_OEM_4)
button sends ESC when pressed with CTRL: entered there
U+001b, generated the setup package (named my new layout in
description as "Russian - Custom with ESC on CTRL+HA"), installed
generated setup.exe (requires admin privileges), changed in
system settings which RU layout to use instead of standard one,
reboot - and it works.