How to define a mapping for command mode that calls an fzf lua function?

[shmerl]

Hi!

I defined such kind of mapping that reacts to Ctrl-R in command line when it's empty to open Fzf command history (and passes Ctr-R regularly if the command line is not empty):

vim.keymap.set('c', '<C-R>',
  function()
    return ((vim.fn.getcmdline() == '') and (vim.fn.getcmdtype() == ':')) and 'FzfLua command_history<CR>' or '<C-R>'
  end,
  { expr = true }
)

It works, but I've been trying to turn it into more pure Lua avoiding vim command and using command_history() function instead, but I got stuck making it work. Here is my current WIP:

vim.keymap.set('c', '<C-R>',
  function()
    if ((vim.fn.getcmdline() == '') and (vim.fn.getcmdtype() == ':')) then
      -- switch to normal mode first
      vim.api.nvim_feedkeys('<Esc>', 'nx', true)
      require('fzf-lua').command_history()
    else
      vim.api.nvim_feedkeys('<C-R>', 'nx', true)
    end
  end
)

It has two problems:

1. Ctr-R does call require('fzf-lua').command_history() which opens the UI with command history, but it doesn't get focused and doing anything next remains in the command line, not in the opened window.

2. The other issue is that pressing Ctrl-R with non empty command line uses suggests " register only 50% of the time, while with the first solution it always works.

Do you have any suggestions how this can be done correctly? I assume nvim_feedkeys isn't doing enough for it, or I missed something there.

Thank you!

[nenahp]

vim.keymap.set('c', '<C-R>', function()
  if (fn.getcmdline() == '') and (fn.getcmdtype() == ':') then
    -- switch to normal mode first
    api.nvim_feedkeys(vim.keycode('<Esc>'), 'nt', false)
    vim.schedule(function() require('fzf-lua').command_history() end)
  else
    api.nvim_feedkeys(vim.keycode('<C-R>'), 'nt', false)
  end
end)