[mini.pairs] Putting opening bracket on new line

[sebastianstudniczek]

I was wondering whether it's possible to implement Allman style for brackets.

I am writing C# where the default convention is putting brackets on separate lines.

Let's say I have such method signature:

    public void TestMethod() {}

Is it possible to put both brackets on separate lines, either directly when inserting the open bracket or hitting enter when inside brackets?

Desired result:

    public void TestMethod() 
    {

    }

[echasnovski]

With 'mini.pairs' - I am afraid the answer is a no. It deliberately acts as an equivalent of <CR><C-o>O, i.e. does not affect the left character.

A possible solution here might be to use MiniKeymap.map_multistep() with a custom step. To do that only inside C# files, create a ~/.config/nvim/after/ftplugin/csharp.lua filetype plugin with the following content:

if _G.MiniKeymap then
  -- Act only when cursor is between `{}`
  local is_inside_braces = function()
    local line = vim.api.nvim_get_current_line()
    local col = vim.api.nvim_win_get_cursor(0)[2]
    return line:sub(col, col + 1) == '{}'
  end
  -- Mock a sequence of keys that produce an Allman style
  -- NOTE: It is not perfect, as there might be issues with indentation and
  -- trailing whitespace. Adjust it to fit the use case better
  local allman_action = function() return '<Left><CR><Right><CR><CR><Up><Tab>' end
  local allman_step = { condition = is_inside_braces, action = allman_action }

  -- Create a buffer-local mapping that doesn't remap (to be able to use `<CR>` in the output
  -- without infinite recursion
  local opts = { remap = false, buf = 0 }
  MiniKeymap.map_multistep('i', '<CR>', { 'pmenu_accept', allman_step, 'minipairs_cr' }, opts)
end

[sebastianstudniczek]

Great, will check that out, thanks for help!