[Question]: Disable Scrollbar

[techtycho]

How to hide the scrollbar, because it looks very bad in my config:

Can I hide the scrollbar, I want to still be able to scroll with keybindings, but with a hidden scrollbar.

[ratheesh]

It would be really nice to bring back the thin scrollbar that was introduced during the development of floating window based completion window but later removed. thin scrollbar looks slick!

[techtycho]

Hey, can I even change the scrollbar characters?

[ratheesh]

@techtycho, We had this option during the development of the the floating window based completion PR. But, it was removed before integration into the main branch.

[techtycho]

Is the scrollbar related to nvim-cmp specifically, or just a Neovim API feature?

[Shougo]

The scrollbar is the original feature in nvim-cmp.

[techtycho]

Is there anything I can do to get it right? At least make it look good on my config instead of entirely getting rid of it?

EDIT: I think I found the code responsible for drawing the scrollbar:

 if info.scrollable then
    -- Draw the background of the scrollbar

    if not info.border_info.visible then
      local style = {
        relative = 'editor',
        style = 'minimal',
        width = 1,
        height = self.style.height,
        row = info.row,
        col = info.col + info.width - info.scrollbar_offset, -- info.col was already contained the scrollbar offset.
        zindex = (self.style.zindex and (self.style.zindex + 1) or 1),
      }
      if self.sbar_win and vim.api.nvim_win_is_valid(self.sbar_win) then
        vim.api.nvim_win_set_config(self.sbar_win, style)
      else
        style.noautocmd = true
        self.sbar_win = vim.api.nvim_open_win(buffer.ensure(self.name .. 'sbar_buf'), false, style)
        vim.api.nvim_win_set_option(self.sbar_win, 'winhighlight', 'EndOfBuffer:PmenuSbar,NormalFloat:PmenuSbar')
      end
    end

    -- Draw the scrollbar thumb
    local thumb_height = math.floor(info.inner_height * (info.inner_height / self:get_content_height()) + 0.5)
    local thumb_offset = math.floor(info.inner_height * (vim.fn.getwininfo(self.win)[1].topline / self:get_content_height()))

    local style = {
      relative = 'editor',
      style = 'minimal',
      width = 1,
      height = math.max(1, thumb_height),
      row = info.row + thumb_offset + (info.border_info.visible and info.border_info.top or 0),
      col = info.col + info.width - 1, -- info.col was already added scrollbar offset.
      zindex = (self.style.zindex and (self.style.zindex + 2) or 2),
    }
    if self.thumb_win and vim.api.nvim_win_is_valid(self.thumb_win) then
      vim.api.nvim_win_set_config(self.thumb_win, style)
    else
      style.noautocmd = true
      self.thumb_win = vim.api.nvim_open_win(buffer.ensure(self.name .. 'thumb_buf'), false, style)
      vim.api.nvim_win_set_option(self.thumb_win, 'winhighlight', 'EndOfBuffer:PmenuThumb,NormalFloat:PmenuThumb')
    end
  else
    if self.sbar_win and vim.api.nvim_win_is_valid(self.sbar_win) then
      vim.api.nvim_win_hide(self.sbar_win)
      self.sbar_win = nil
    end
    if self.thumb_win and vim.api.nvim_win_is_valid(self.thumb_win) then
      vim.api.nvim_win_hide(self.thumb_win)
      self.thumb_win = nil
    end
  end

I think PmenuThumb is the highlight group for the scrollbar thumb, but the rest of the code is messy, I'll try to read and understand it, in case a pull request is necessary.

[AlexvZyl]

Any news on this?

[barrett-ruth]

@Alex-vZyl I just deleted the if statement on my copy of nvim-cmp. All seems to work for me. I guess we just wait if this is every implemented but it should be pretty trivial if dodging the if block is the solution.

[pure-bliss]

https://github.com/hrsh7th/nvim-cmp/pull/1308 should answer this:

cmp.setup({
  window = {
    completion = {
      scrollbar = false,
    },
  },
})