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I have set up some langmaps, notably ü< and ó> on my Hungarian keyboard. I also installed machakann/vim-swap which binds g< and g> to swap arguments in a function. The plugin works with g<altgr>í and g<altgr>y which is the default way to get these characters on my keyboard, but will not work with gü and gó. I tried set langremap but that didn't help. In fact gü actually triggers vim's original g<which loads the previous command output.

Any idea on how to get this working properly?

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  • Try the opposite, set nolangremap. I believe the default is on and disabling it might be the sane setting (from my reading of the help docs.)
    – filbranden ♦
    Dec 11, 2020 at 11:19
  • hmm, now the default (command output) behaviour doesn't trigger, but neither does what I want :) I guess langmap has it's limitation. E.g. I just found out that if I have a langmap for Ő} moving around the paragraphs work but fŐ will not jump as f}. This might actually be a good thing, still :)
    – fbence
    Dec 11, 2020 at 11:54
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    I'd still like to understand what is going on, but the workaround for now is explicitly mapping with nmap gü <Plug>(swap-prev) and ` nmap gó <Plug>(swap-next)`
    – fbence
    Dec 11, 2020 at 11:58
  • I think this might be a bug... If I use set langmap=[< or set langmap=(< it works correctly (with g[ or g(, resp.), but set langmap=é< and using gé doesn't work for me (with a simple nmap g< gU_ for testing).
    – filbranden ♦
    Dec 11, 2020 at 15:13

1 Answer 1

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This seems to be a bug in Vim's handling of 'langmap'. I can consistently reproduce it and it seems to only happen when using a "from" character on the 'langmap' that is outside of the basic 7-bit ASCII range (letters, numbers, basic symbols.)

I reported the issue upstream here: https://github.com/vim/vim/issues/7458 (I'll update this answer once there's a fix for it.)

For now, as you reported in comments, adding specific mappings seems to be a functioning workaround:

nmap gü <Plug>(swap-prev)
nmap gó <Plug>(swap-next)

In the comments, you also asked about how the 'langmap' interacts with commands such as f, F, t and T. For those, as well as r (to replace a single character), the 'langmap' settings are intentionally not used.

There's a separate :lmap command (separate from the 'langmap' settings) that allow you to create similar mappings to the ones from 'langmap', but that work in other situations, which include the f, F, t and T motions and the r command.

But these also may affect the Ex command-line, the line when entering a search pattern (after / or ?) and they may also affect how the key behaves in Insert mode. There's a handful of additional settings to control those, and also key bindings such as CTRL-^ to switch the behavior in each of those modes. (Warning, the rabbit hole goes deep from here.) See :help language-mapping for all the gory details (you'll need to read that carefully and probably experiment with it to find what works well in your case.)

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    Thanks! I have a weird feeling of accomplishment that I managed to run into a bug in -vim_ :D Also, that rabbit hole looks a lot deeper than what I'm hoping to gain on first glance, but I'll think on it. (I would not want to mess with insert mode, on the other hand, I usually use vim to type code, which rarely involves writing in Hungarian, so maybe switching could work ...).
    – fbence
    Dec 11, 2020 at 20:11

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