Delete hidden buffers on UI close

[al-ce]

Summary: New UI buffers are created on each call of MurenOpen but seemingly not deleted on MurenClose, since the UI is closed by nvim_win_close . Should MurenClose call nvim_buf_delete instead?

Hello! I was wondering about Muren's buffer creation/deletion cycle. (I'm not well versed in Vim buffer fundamentals, so I hope this isn't a distraction). I have a function in my bufferline that keeps track of the loaded buffer count.

function()
  local listed_bufs = vim.api.nvim_list_bufs()
  local loaded_bufs = vim.tbl_filter(function(v)
    return vim.api.nvim_buf_is_loaded(v)
  end, listed_bufs)
  return #loaded_bufs
end,

During MurenClose each UI window is closed with nvim_win_close

https://github.com/AckslD/muren.nvim/blob/e4558ab845f380915bb35b2fb7fea428b852cb8a/lua/muren/ui.lua#L532-L538

but, if my function is setup correctly, it appears the buffers are still in memory after closing. In the clip below, you can see the loaded buffer count creeping up by four on each open/close cycle

https://github.com/AckslD/muren.nvim/assets/23170004/20e14db1-ecc5-4a53-9739-13510f130876

Using nvim_buf_delete instead keeps the buffer count steady.

https://github.com/AckslD/muren.nvim/assets/23170004/8691f49c-c3ca-47be-ae96-4835aeb48300

Since save_lines is called right before closing the windows or deleting the buffers, subsequent calls of MurenOpen preserve the lines of previous ones.

https://github.com/AckslD/muren.nvim/assets/23170004/eeef81eb-f68b-462a-9682-537b82f4e621

Would this have some negative consequence on functionality?

I know that it's unlikely this would significantly affect performance, since no one is going to open/close Muren in a single session enough times for this to matter, but I thought I'd mention it (yes, I should have probably gone outdoors more on this Saturday). Hope all is well!