redraw doesn't update the UI during substitute

[folke]

When using vim.ui_attach with ext_cmdline, :redraw doesn't update the ui during substitute

[folke]

The following hack seems to work:

  if vim.api.nvim_get_mode().mode == "c" and vim.fn.getcmdline():find("s/") then
    -- HACK: this will trigger redraw during substitue
    vim.api.nvim_input("<space><bs>")
  end

[zeertzjq]

Hmm, this seem to be intentional from #9783

[folke]

Damn, you're right. Any idea how my hack works?

Would there be a better way to force a redraw that doesnt enter characters?

[folke]

The cmdline_show events also do come in before the redraw lock, but it seems the cmdline_pos events come in after the redraw lock.

Maybe it can be fixes by also sending the cmdline_pos events before the redraw lock?

[folke]

So, that's why my hack works. I simply get a new cmdline_show event

[folke]

I was able to fix this for Noice by calling update_screen() with ffi

  local ffi = require("noice.util.ffi")
  if ffi.cmdpreview then
    -- HACK: this will trigger redraw during substitute and cmdpreview,
    -- but when moving the cursor, the screen will be cleared until
    -- a new character is entered
    ffi.update_screen()
  end

I only call that code during substitute and when the cmdline cursor is not at the end of the cmdline, to prevent flickering.