Neovim LSP Rename with nui.nvim

nui_lsp.lua

local Input = require("nui.input")
local event = require("nui.utils.autocmd").event

local function nui_lsp_rename()
  local curr_name = vim.fn.expand("<cword>")

  local params = vim.lsp.util.make_position_params()

  local function on_submit(new_name)
    if not new_name or #new_name == 0 or curr_name == new_name then
      -- do nothing if `new_name` is empty or not changed.
      return
    end

    -- add `newName` property to `params`.
    -- this is needed for making `textDocument/rename` request.
    params.newName = new_name

    -- send the `textDocument/rename` request to LSP server
    vim.lsp.buf_request(0, "textDocument/rename", params, function(_, result, ctx, _)
      if not result then
        -- do nothing if server returns empty result
        return
      end

      -- the `result` contains all the places we need to update the
      -- name of the identifier. so we apply those edits.
      local client = vim.lsp.get_client_by_id(ctx.client_id)
      vim.lsp.util.apply_workspace_edit(result, client.offset_encoding)

      -- after the edits are applied, the files are not saved automatically.
      -- let's remind ourselves to save those...
      local total_files = vim.tbl_count(result.changes)
      print(
        string.format(
          "Changed %s file%s. To save them run ':wa'",
          total_files,
          total_files > 1 and "s" or ""
        )
      )
    end)
  end
  
  local popup_options = {
    -- border for the window
    border = {
      style = "rounded",
      text = {
        top = "[Rename]",
        top_align = "left"
      },
    },
    -- highlight for the window.
    highlight = "Normal:Normal",
    -- place the popup window relative to the
    -- buffer position of the identifier
    relative = {
      type = "buf",
      position = {
        -- this is the same `params` we got earlier
        row = params.position.line,
        col = params.position.character,
      }
    },
    -- position the popup window on the line below identifier
    position = {
      row = 1,
      col = 0,
    },
    -- 25 cells wide, should be enough for most identifier names
    size = {
      width = 25,
      height = 1,
    },
  }

  local input = Input(popup_options, {
    -- set the default value to current name
    default_value = curr_name,
    -- pass the `on_submit` callback function we wrote earlier
    on_submit = on_submit,
    prompt = "",
  })

  input:mount()

  -- close on <esc> in normal mode
  input:map("n", "<esc>", input.input_props.on_close, { noremap = true })

  -- close when cursor leaves the buffer
  input:on(event.BufLeave, input.input_props.on_close, { once = true })
end

return {
  lsp_rename = nui_lsp_rename,
}

would it be possible to set the initial state to NORMAL mode instead of INSERT mode? I tried adding vim.cmd('stopinsert') after input:mount() but that didn't work.

Hey @disrupted, you can do this after mounting:

  vim.schedule(function()
    vim.api.nvim_command("stopinsert")
  end)

This is how it runs:

• input is mounted
• It enters INSERT mode
• The default_value (i.e. the current name of the variable you're renaming) is inserted to the prompt
• After vim is done with all those, it'll run your scheduled callback, so it'll exit INSERT mode.

Just curious, what is your usecase for doing this? 🤔

Hi @MunifTanjim, thanks for the explanation. That did the trick!

When renaming a symbol I usually don't append something to the name, more often than not I want to change the whole name or parts of it.

This is part of some other small tweaks I made to my config.
Since I am working with snake-case languages (Python, Rust, Lua) for the most part, temporarily changing the iskeyword setting makes it possible to move around and change parts of long_variable_name more easily.

Also made it so the window width is set dynamically depending on the string length.

https://github.com/disrupted/dotfiles/blob/3d239c8265d041ecd9e54fe2b66731e90800d6e5/.config/nvim/lua/conf/nui_lsp.lua

neovim updated the lsp-handler, line 20 must now be

vim.lsp.buf_request(0, "textDocument/rename", lsp_params, function(_, result, _, _)

neovim updated the lsp-handler, line 20 must now be

vim.lsp.buf_request(0, "textDocument/rename", lsp_params, function(_, result, _, _)

Thanks @RaafatTurki!!! I was wondering why rename was not working on my setup, I thought something was wrong with the lsp server 😅
I just tried your suggestion and it's working again! 🎉