ChoiceNode and default options

[gregdvd]

Hi! I'm writing a snippet with two choice nodes with the same options and I'm wondering if there's a way to show different defaults. I can probably explain it better with a toy example

local my_options = { t 'opt1', t 'opt2', t 'opt3' }

s('choices', {
    t 'something ',
    c(1, my_options), -- shows opt1, OK
    t ' something ',
    c(2, my_options), -- should show, e.g., opt2
  }),

For now, I've solved by changing the table my_options with a function that returns a table with a circular shift of the elements (i.e., my_options_fnc(2) returns `{ t 'opt2', t 'opt3', t 'opt1' }), but I guess there's a more elegant solution. I've tried with callbacks, for instance

c(2, my_options, {node_callbacks = {
        [events.enter] = function(_, _)
          require('luasnip').set_choice(2)
        end,
      },
})

but I couldn't make it work.

Thanks in advance!

[ShreeChaturvedi]

choices[1] is always the initial one. init_nodes in choiceNode.lua hardcodes self.active_choice = self.choices[1], and there's no opt for it. Your rotation is the right call:

local function from(n, choices)
  local out = {}
  for i = 1, #choices do
    out[i] = choices[(n + i - 2) % #choices + 1]
  end
  return out
end

c(2, from(2, my_options))

The enter callback can't get you there anyway. It fires mid-jump, before the node becomes current, and set_choice re-enters the same code path. Even if it landed, the buffer would still show opt1 until you jump to that node.

[gregdvd]

Understood! Thanks for the insight!