nvim-config/init.vim

" vim: set et sw=2 ts=2 tw=80 :

" SETTINGS

if !has('nvim')
  setlocal cm=blowfish2
end

" set relative line numbers
set number relativenumber

" set highlighting and continous search
set hlsearch incsearch

" show n-column limiter when textwidth is set
set colorcolumn=+1

if has('nvim')
  " prevent terminal buffers to be closed when changing buffer
  autocmd TermOpen * set bufhidden=hide

  " remove line numbers to terminale
  autocmd TermOpen * set nornu nonu
end

" set autoindent on`
set autoindent

" Make :find work on all files in :pwd
set path+=**
set wildignore+=**/node_modules/**

" ADDITIONAL COMMANDS

inoremap <S-tab> <C-d>

" make escape work in terminal and send ESC to terminal with C-Esc
tnoremap <Esc> <C-\><C-n>
tnoremap <C-Esc> <Esc>

" activate autocompletion using `key` when under a 'keyword' char
" (a-zA-Z + relevant characters for current language), otherwise just send TAB
function! AutocompleteIfKeyword()
  let curcol = col('.') - 1 " column position before the cursor
  if !curcol " if at the beginning of the line
    return "\<tab>" " insert TAB character
  elseif getline('.')[curcol - 1] =~ '\k' " if current character is a 'keyword'
    return g:autocomplete_key " activate autocompletion for current word
  else " if the current char is not a 'keyword'
    return "\<tab>" " insert TAB characher
  end
endfunction

" autocomplete using `key` with tab if cursor is under a 'keyword' char.
" for <C-r>= see: https://stackoverflow.com/questions/10862457
inoremap <silent> <tab> <C-r>=AutocompleteIfKeyword()<CR>

" use standard vim autocomplete as fallback
let g:autocomplete_key = "\<C-n>"

" autocomplete with Tsuquyomi on TypeScript files
autocmd FileType typescript let g:autocomplete_key = "\<C-x>\<C-o>"

" clear search pattern with F2
noremap <F2> :let @/ = ""<CR>

" Use "," as leader
let mapleader = ","

" Switch between Windows with: Leader w
nnoremap <Leader>w <C-w><C-w>

" Show next buffer with: Leader n
nnoremap <Leader>n :bn<CR>

" Fix indentation with: Leader i
nnoremap <Leader>i mzgg=G`z

" Delete buffer with: Leader d
nnoremap <Leader>d :bd<CR>

" clear trailing spaces in file
function! g:ClearTrailingSpaces()
  silent! %s/\s *$//g
  let @/ = "" " clear last search
endfunction

" remove trailing spaces with: Leader t s
nnoremap <silent> <Leader>ts :call ClearTrailingSpaces()<CR>

" automatically remove trailing spaces when saving a file
autocmd BufWrite * call ClearTrailingSpaces()

" Reload config with: Leader R
nnoremap <Leader>R :source ~/.config/nvim/init.vim<CR>

" show Vim's true competitor with: Leader r c m
nnoremap <Leader>rcm :!open https://youtu.be/jn40Ugz0vuk<CR><CR>

" COLORSCHEME

" set colorscheme to onedark.im for nvim and airline
packadd! onedark.vim
colorscheme onedark
let g:airline_theme='onedark'

" PACKAGES

" vim-fish setup
syntax enable
filetype plugin indent on
" Set up :make to use fish for syntax checking.
autocmd FileType fish compiler fish

if has("vms")
  set nobackup		" do not keep a backup file, use versions instead
else
  set backup		" keep a backup file (restore to previous version)
  if has('persistent_undo')
    set undofile	" keep an undo file (undo changes after closing)
  endif
endif