How to repeat a mapping when keeping key pressed

Question

I have in my .vimrc some simple mappings to resize split windows easily:

noremap <Leader><UP>    <C-w>+
noremap <Leader><DOWN>  <C-w>-

That works pretty fine but for example, when I want to resize the window of 10 lines I have to press and release Leader+UP 10 times.

How can I repeat this mapping while the keys are pressed? What I want is when I press Leader+UP the mapping will be applied once then after a short duration it will be applied once again and so on while I hold the keys.

Note: I know it is possible to prefix <C-w>+ with a count and I could hardcode it in the mapping or simply input a count before using the mapping but that's not how I want to do it.

Note2: I also know that a popular mapping to resize windows is to use + and - keys which are easier to press several times but I don't want to use those keys to do that neither.

Answer 1

You could try entering a ... Vim submode! For your case, something like this:

call submode#enter_with('grow/shrink', 'n', '', '<leader><up>', '<C-w>+')
call submode#enter_with('grow/shrink', 'n', '', '<leader><down>', '<C-w>-')
call submode#map('grow/shrink', 'n', '', '<down>', '<C-w>-')
call submode#map('grow/shrink', 'n', '', '<up>', '<C-w>+')

This means, you enter the submode with Leader-Up or Leader-Down (which will also grow/shrink the window once) and then - you'll only have to press Up or Down to grow/shrink the window, until you exit the submode.

See also the help, for timeout issues, but, to disable it:

"disable submode timeouts:
let g:submode_timeout = 0

... which means you'll stay in that submode indefinitely, until you press a key other than Up or Down, or until you hit Esc.

Aaand, the next useful tip I'd recommend:

" don't consume submode-leaving key
let g:submode_keep_leaving_key = 1

... which allows you to move directly to your next commands, when pressing a different key. For instance, pressing : will both leave the submode and open the command line.

Answer 2

With winresizer, hit Ctrl-e and resize away!

You'll use the regular hjkl keys (and maybe the arrow keys).

You can "accept" the resize or "abort" it.

There's also a move-mode where you swap windows around, and a focus-mode where you switch the window you're active in.