-- General-Purpose keybinds
local keymap_opts = { silent = true, noremap = true }

function NumberToggle()
  if vim.o.relativenumber then
    vim.opt.relativenumber = false
    vim.opt.number = true
  else
    vim.opt.relativenumber = true
  end
end

-- Space is the leader key when outside of insert mode.
vim.g.mapleader = " "

vim.api.nvim_set_keymap('', '<Leader>t', ':NERDTreeToggle<CR>', {silent = true})

-- <SPC>-r controls relative line numbering.
vim.api.nvim_set_keymap('n', '<Leader>r', '<cmd>lua NumberToggle()<CR>', keymap_opts)

-- Pressing enter in command mode clears the current search highlighting until
-- the next search.
vim.api.nvim_set_keymap('n', '<CR>', ':noh<CR><CR>', keymap_opts)

-- This one maps F5 to delete all trailing whitespace
vim.api.nvim_set_keymap(
  'n',
  '<F5>',
  [[:let _s=@/<Bar>:%s/\s\+$//e<Bar>:let @/=_s<Bar>:nohl<CR>]],
  keymap_opts)