local signcolumn setting

[doongjohn]

I'm using vim.o.signcolumn = 'yes:3' for my neovim config.
I want to set signcolumn=auto only for the neo-tree window.

I've tried event_handlers

require'neo-tree'.setup {
  event_handlers = {
    {
      event = "vim_win_enter",
      handler = function(arg)
        vim.cmd [[setlocal scl=auto]]
      end
    }
  }
}

but this will set signcolumn=auto for all windows 😢

[cseickel]

Yes, the vim_win_enter is just using the vim autocmd event directly and fires for all events once subscribed. You could use that and add a check for the filetype, or do the same in a generic vim BufEnter event. Either way the key is to check the filetype first:

require'neo-tree'.setup {
  event_handlers = {
    {
      event = "vim_win_enter",
      handler = function(arg)
        if vim.bo.filetype == "neo-tree" then
          vim.cmd [[setlocal scl=auto]]
        end
      end
    }
  }
}

[doongjohn]

Thanks this worked perfectly!

require'neo-tree'.setup {
  event_handlers = {
    {
      event = "vim_buffer_enter",
      handler = function(arg)
        if vim.bo.filetype == "neo-tree" then
          vim.cmd [[setlocal scl=auto]]
        end
      end
    }
  }
}

[bennypowers]

Thanks I adopted this to turn off other settings

  event_handlers = {
    {
      event = "vim_buffer_enter",
      handler = function(arg)
        if vim.bo.filetype == "neo-tree" then
          vim.cmd [[
            setlocal nocursorcolumn
            setlocal virtualedit=all
          ]]
        end
      end
    }
  },

[cseickel]

Glad to hear it worked out! I'm going to convert this to a discussion for others to find.

[cseickel]

For anyone else interested in this, please see this comment on #155 and let me know your thoughts.

[rockyzhang24]

I think we can use neo_tree_buffer_enter event instead of the general vim_buffer_enter event.

  event_handlers = {
    {
      event = "neo_tree_buffer_enter",
      handler = function(arg)
        vim.cmd [[
          setlocal signcolumn=no
        ]]
      end,
    }
  },

[cseickel]

This is correct. When the question was originally asked, we did not have a "neo_tree_buffer_enter" yet. This new event makes it a little easier and might handle some more edge cases now or in the future.

[rockyzhang24]

Okay I see. Thank you.