How to toggle blink completions with a binding?

[rieje]

How to toggle blink completions with a binding? I tried getting the state with vim.api.nvim_buf_get_var(0, "completion") as in:

vim.keymap.set("n", "<leader>bc", function()
  if vim.api.nvim_buf_get_var(0, "completion") then
    vim.api.nvim_buf_set_var(0, "completion", false)
  else
    vim.api.nvim_buf_set_var(0, "completion", true)
  end
end, { desc = "Toggle blink.cmp completions current buffer" })

but get Key not found: completion.

Also curious to know if it's possible to only toggle a particular source, e.g. dictionary. And restrict it to using only on a particular file. Curious in all of these ways.

Thanks.

[silvercircle]

You need to use pcall to safeguard the vim.api.nvim_buf_get_var call and then check the status, something like:

local status, val = pcall(vim.api.nvim_buf_get_var, bufnr, "completion")
local disabled = (status == true and val == false)

When status returns false it means the variable is not present at all for this buffer, so completion should remain enabled. You only want to disable it when the buffer var is present and its value is false.