[WIP] Center the whole menu

[mhinz]

This is a PR for playing around with centering the menu.

Introduces: g:startify_center. This option should be set to the longest line you expect in the menu. Values between 50 - 80 probably make sense. Just play around a bit.

[zdcthomas]

Just fyi I've been using this branch for a while now with no problems

[rockyzhang24]

Nice feature. Can't wait. Please merge, please.

[Jay1]

I've been running this at work for a while with my colleagues.
Nothing to report, you can merge as you see fit.

[Andy3153]

How would I go about using this in my configuration to center my menu as well? So, there's this new variable, but how can I use it? I didn't find anything in :h startify mentioning this..

[mxaddict]

Was this ever merged into master?

[nerun]

2023
I have added the changes to the current master branch. Not working. For example, setting let g:startify_center=80 make the cursor cannot go back from a certain column, but the text remains in the same place.

[2hexed]

Hello, I would really love to have this feature. Will it ever be merged?

[akhdanfadh]

The custom headers is not centered in this branch, here is my minimal lazy.nvim config that works:

return {
  "mhinz/vim-startify",
  branch = "center",
  config = function()
    vim.g.startify_center = 50

    local function get_padding()
      local padding_left = 3
      if vim.g.startify_center then
        padding_left = math.floor((vim.fn.winwidth("%") - vim.g.startify_center) / 2)
      end
      return string.rep(" ", padding_left)
    end

    vim.g.startify_lists = {
      { type = "sessions", header = { get_padding() .. "Sessions" } },
      { type = "dir", header = { get_padding() .. "Most Recently Used (MRU)" } },
      { type = "dir", header = { get_padding() .. "(MRU) " .. vim.fn.getcwd() } },
      { type = "bookmarks", header = { get_padding() .. "Bookmarks" } },
    }
  end,
}