Using heirline mode colors to change cursorline color

[pynappo]

This isn't really a segment so I figured I shouldn't put it in the wiki but I thought I would share it here anyways:

2023-01-13.09-58-12.mp4

heirline_colors.mode should be your modes color map

local heirline_colors = {}

vim.api.nvim_create_autocmd('ColorScheme', {
  callback = function()
    heirline_colors = {
      mode = { -- replace this table!
        n = 'type',
        i = 'string',
        v = 'func',
        V = 'func',
        ['\22'] = '',
        c = 'debug',
        s = 'constant',
        S = 'constant',
        ['\19'] = 'constant',
        R = 'diag_error',
        r = 'diag_error',
        ['!'] = 'diag_error',
        t = 'normal',
      },
      loaded = require('heirline.highlights').get_loaded_colors(),
    }
    end
  end,
  desc = 'Try to update heirline mode colors'
})
local cursorline_bg_hex = string.format('%06x', vim.api.nvim_get_hl_by_name('CursorLine', true).background)
vim.api.nvim_set_hl(0, 'ModeCursorLine', { bg = '#' .. cursorline_bg_hex })
vim.api.nvim_create_autocmd({ 'VimEnter', 'ModeChanged' }, {
  callback = function()
    local heirline_color = heirline_colors.loaded[heirline_colors.mode[vim.fn.mode()]]
    local hex
    if not heirline_color then hex = cursorline_bg_hex
    else 
      hex = ('%06x'):format(heirline_color)
      local rgb = {
        tonumber('0x' .. hex:sub(1, 2)),
        tonumber('0x' .. hex:sub(3, 4)),
        tonumber('0x' .. hex:sub(5, 6)),
      }
      hex = ''
      for _, v in ipairs(rgb) do hex = hex .. ('%02x'):format(v / 5) end
    end
    vim.cmd.highlight('ModeCursorLine guibg=#' .. hex)
    vim.cmd.redraw()
  end,
  desc = 'Change mode cursorline',
})
vim.api.nvim_create_autocmd({ 'BufWinEnter', 'WinEnter', 'CmdLineLeave'}, {
  callback = function() vim.opt_local.winhighlight:append('CursorLine:ModeCursorLine') end,
  desc = 'Enable mode cursorline for current windows',
})
vim.api.nvim_create_autocmd({ 'WinLeave', 'CmdLineEnter' }, {
  callback = function() vim.opt_local.winhighlight:remove({ 'CursorLine' }) end,
  desc = 'Disable mode cursorline for non-current windows',
})