How to use Ctrl-h to delete a character, just like the default behavior in the shell.

[gengdz]

Currently, when I use C-h, it closes the floating window instead of deleting a character.

[ibhagwan]

Set ctrl-h in keymap.fzf to the appropriate action, I think it’s called backward-delete-char, lookup man fzf to be sure.

[gengdz]

I read the documentation and found out that it is backward-delete-char after trying.

However, I've noticed that when I use Ctrl-h, it still closes the window directly, while using Ctrl-w works as expected. I suspect that Ctrl-h might have been assigned a different meaning, how should I go about investigating this?

["ctrl-h"] = "backward-delete-char" -- not working

["ctrl-w"] = "backward-delete-char" -- it works

[gengdz]

I found out it's not caused by fzf-lua, maybe by my tmux settings and the christoomey/vim-tmux-navigator settings. I need to check into this.

However, what's strange is that previously in telescope I was able to use Ctrl-h to delete characters without this issue.

Is there a concept of priority when it comes to keyboard shortcuts? I don't know.

[ibhagwan]

found out it's not caused by fzf-lua, maybe by my tmux settings and the christoomey/vim-tmux-navigator settings. I need to check into this.

You’re correct that’s the cause as it uses ctrl-h to move window left.

However, what's strange is that previously in telescope, I was able to use Ctrl-h to delete characters without this issue.

It is not strange, perhaps tmux navigator is limited to term windows (which fzf is)? I don’t know, you’ll have to investigate it yourself and perhaps have an exclusion in the tmux navigator keybind for fzf windows.

I personally use my own cooked version of tmux navigator (written in lua) using the alt-hjkl binds, if you wanna take a look:
https://github.com/ibhagwan/nvim-lua/blob/d6a3dd1de64414b48231d6498b901f8c5a8bc9d3/lua/utils.lua#L373

Which then mapped in:
https://github.com/ibhagwan/nvim-lua/blob/d6a3dd1de64414b48231d6498b901f8c5a8bc9d3/lua/keymaps.lua#L66-L71

And in my tmux.conf:
https://github.com/ibhagwan/dots/blob/015a37fd6c402810236f11626085960fb73e101b/.config/tmux/tmux.conf#L70-L78

[ibhagwan]

This didn’t happen in telescope because telescope maps <C-h> on telescope windows overriding the tmux navigator binds, FzfLua’s ctrl-h is a shell mapping and doesn’t exist on the fzf window so tmux navigator takes over, what you can do is map ctrl-h to itself upon fzf window creation, this should solve your issue:

    vim.api.nvim_create_autocmd("FileType", {
      group = vim.api.nvim_create_augroup('FzfCtrlH', { clear = true }),
      pattern = "fzf",
      callback = function(e)
        vim.keymap.set("t", "<C-h>", "<C-h>", { buffer = e.buf, silent = true })
      end,
    })

[ibhagwan]

Btw, I still prefer my own tmux navigator, it also has the cool mapping of Alt-o to go back to the last tmux pane similar to <tmux-prefix>o, and since I mostly left/right pane this is perfect, if I have a neovim split open it will act as <C-w>w.