nvim-config/init.vim

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

" SETTINGS

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

" Set doc folder for plugins
helptags ~/.config/nvim/doc

" activate mouse support
set mouse=a

" allow unsaved hidden buffers
set hidden

" set column padding when scrolling from top or bottom
set scrolloff=5

" 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

  " restore line numbers for all buffers (revert changes of cmd below)
  autocmd BufCreate * set rnu nu

  " remove line numbers to terminal
  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/**,*~

" set netrw preferred style to tree
let g:netrw_liststyle = 3

" remove netrw top banner
let g:netrw_banner = 0

let g:netrw_list_hide = netrw_gitignore#Hide()

" ADDITIONAL COMMANDS

function! WQ()
  :W
  :quit
endfunction

command! Q quit
command! W write suda://%
command! WQ call WQ()

" emulate system clipboard
inoremap <C-v> <ESC>"+pa
vnoremap <C-c> "+y

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>"

" Automatically save folds for each file
augroup AutoSaveFolds
  autocmd!
  autocmd BufWinLeave * silent! mkview
  autocmd BufWinEnter * silent! loadview
augroup END

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

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

" Git grep with Leader g
nnoremap <Leader>g :Grepper -tool git<CR>

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

" show next buffer with: leader n
nnoremap <leader>n :bn<cr>

" show previous buffer with: leader n
nnoremap <leader>p :bp<cr>

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

" Delete buffer with: Leader d
nnoremap <Leader>d :bp\|bd #<CR>

" move to next tab with: Leader t
nnoremap <Leader>t :tabnext<CR>
tnoremap <C-e> <C-\><C-n>:tabnext<CR>

silent! unmap <Leader>I
nnoremap <unique> <Leader>I <Plug>WildignoreFromGitignore

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

" remove trailing spaces with: Leader t s
nnoremap <silent> <Leader>s :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>

" open netrw in directory of current file
nnoremap <Leader>e :Ex<CR>

" close quickfix window with: Leader Q
nnoremap <Leader>Q :ccl<CR>

" Insert in the end of file with Leader c
nnoremap <Leader>c GA

" Go files: launch go lint quickfix with: Leader q
autocmd FileType go nnoremap <Leader>q :w<CR>:GoLint<CR>

" TypeScript files: launch TypeScript lint quickfix with: Leader q
autocmd FileType typescript nnoremap <Leader>q :TsuQuickFix<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