vimrc

syntax on
" colorscheme wombat256mod
set background=dark
let g:gruvbox_contrast_dark = 'hard'
colorscheme gruvbox

set encoding=utf-8
set noequalalways
set foldlevelstart=99
set foldtext=substitute(getline(v:foldstart),'/\\*\\\|\\*/\\\|{{{\\d\\=',''\'','g')
set modeline
set autoindent expandtab smarttab
set shiftround
set nocompatible
set cursorline
" set list
set number
set relativenumber
set incsearch hlsearch
" set showcmd
set laststatus=2
set backspace=indent,eol,start
set wildmenu
set autoread
set history=5000
set noswapfile
set fillchars="vert:|,fold: "
set showmatch
set matchtime=2
set hidden
set listchars=tab:⇥\ ,trail:␣,extends:⇉,precedes:⇇,nbsp:·,eol:¬,space:␣
set ignorecase
set smartcase

autocmd FileType erl setlocal ts=4 sw=4 sts=4 et

" https://vi.stackexchange.com/questions/6/how-can-i-use-the-undofile
if !isdirectory($HOME."/.vim")
call mkdir($HOME."/.vim", "", 0770)
endif
if !isdirectory($HOME."/.vim/undo-dir")
call mkdir($HOME."/.vim/undo-dir", "", 0700)
endif
set undodir=~/.vim/undo-dir
set undofile

" TODO airline-ify
" set statusline=   " clear the statusline for when vimrc is reloaded
" set statusline+=[%-6{fugitive#head()}]
" set statusline+=%f\                          " file name
" set statusline+=[%2{strlen(&ft)?&ft:'none'},  " filetype
" set statusline+=%2{strlen(&fenc)?&fenc:&enc}, " encoding
" set statusline+=%2{&fileformat}]              " file format
" set statusline+=[%L\,r%l,c%c]            " [total lines,row,column]
" set statusline+=[b%n,                      " buffer number
" " window number, alternate file in which window (-1 = not visible)
" set statusline+=w%{winnr()}]
" set statusline+=%h%m%r%w                     " flags

" === Scripts   {{{1
" ===========

" _$ - Strip trailing whitespace {{{2
nnoremap _$ :call Preserve("%s/\\s\\+$//e")<CR>
function! Preserve(command)
" Preparation: save last search, and cursor position.
let _s=@/
let l = line(".")
let c = col(".")
" Do the business:
execute a:command
" Clean up: restore previous search history, and cursor position
let @/=_s
call cursor(l, c)
endfunction

" MakeDirsAndSaveFile (:M) {{{2

" Created to be able to save a file opened with :edit where the path
" contains directories that do not exist yet. This script will create
" them and if they exist, `mkdir` will run without throwing an error.

command! M :call MakeDirsAndSaveFile()
" https://stackoverflow.com/questions/12625091/how-to-understand-this-vim-script
" or
" :h eval.txt
" :h :fu
function! MakeDirsAndSaveFile()
" https://vi.stackexchange.com/questions/1942/how-to-execute-shell-commands-silently
:silent !mkdir -p %:h
:redraw!
" ----------------------------------------------------------------------------------
:write
endfunction

" === Key mappings    {{{1
" ================

" Auto-close mappings {{{2
" https://stackoverflow.com/a/34992101/1498178
inoremap <leader>" ""<left>
inoremap ` ``<left>
inoremap <leader>' ''\''<left>
inoremap <leader>( ()<left>
inoremap <leader>[ []<left>
inoremap <leader>{ {}<left>
inoremap <leader>{<CR> {<CR>}<ESC>O
autocmd FileType nix inoremap {<CR> {<CR>};<ESC>O

" 44 instead of <C-^> {{{2
nnoremap 44 <C-^>
" 99 instead of <C-w>w {{{2
nnoremap 99 <C-w>w

" \yy - copy entire buffer to system clipboard {{{2
nnoremap <leader>yy :%yank +<CR>

" \ys - copy entire buffer to * {{{2
nnoremap <leader>ys :%yank *<CR>

" vil - inner line {{{2
nnoremap vil ^vg_

" <Leader>l - change working dir for current window only {{{2
nnoremap <Leader>l :lcd %:p:h<CR>:pwd<CR>

" <Space> instead of 'za' (unfold the actual fold) {{{2
nnoremap <Space> za

" <Leader>J Like gJ, but always remove spaces {{{2
fun! JoinSpaceless()
execute 'normal gJ'

" Character under cursor is whitespace?
if matchstr(getline('.'), '\%' . col('.') . 'c.') =~ '\s'
        " When remove it!
        execute 'normal dw'
endif
endfun
nnoremap <Leader>J :call JoinSpaceless()<CR>

" in NORMAL mode CTRL-j splits line at cursor {{{2
nnoremap <NL> i<CR><ESC>

" <C-p> and <C-n> instead of <Up>,<Down> on command line {{{2
cnoremap <C-p> <Up>
cnoremap <C-n> <Down>

" {visual}* search {{{2
xnoremap * :<C-u>call <SID>VSetSearch()<CR>/<C-R>=@/<CR><CR>
xnoremap # :<C-u>call <SID>VSetSearch()<CR>?<C-R>=@/<CR><CR>
function! s:VSetSearch()
let temp = @s
norm! gv"sy
let @/ = '\V' . substitute(escape(@s, '/\'), '\n', '\\n', 'g')
let @s = temp
endfunction

"gp - http://vim.wikia.com/wiki/Selecting_your_pasted_text
nnoremap <expr> gp '`[' . strpart(getregtype(), 0, 1) . '`]'

" === Plugin configuration   {{{1
" ========================

" peekaboo {{{2
let g:peekaboo_window = 'belowright 30new'

" airline {{{2
let g:airline_theme='distinguished'
" vim-airline was overwriting vim-bufferline settings
" but this prevents it. See bufferline settings below.
let g:airline#extensions#bufferline#overwrite_variables = 0

" fzf-vim {{{2
nnoremap <leader><C-n> :History:<CR>
nnoremap <leader><C-m> :History/<CR>
nnoremap <leader><C-o> :Files<CR>
nnoremap <leader><C-l> :Lines<CR>
nnoremap <leader><C-r> :BLines<CR>
nnoremap <leader><C-k> :Buffers<CR>
nnoremap <leader><C-j> :Ag<CR>
nnoremap <leader><C-w> :Windows<CR>
nnoremap <leader><C-g> :Commits<CR>
nnoremap <leader><C-p> :BCommits<CR>
nnoremap <leader><C-h> :History<CR>
nnoremap <leader><C-u> :Marks<CR>
nnoremap <leader><C-i> :BD<CR>
imap <c-x><c-l> <plug>(fzf-complete-line)

" https://github.com/junegunn/fzf.vim/pull/733#issuecomment-559720813
" (modification: added bang (!) at the end of `bwipeout`
function! s:list_buffers()
redir => list
silent ls
redir END
return split(list, "\n")
endfunction

function! s:delete_buffers(lines)
execute 'bwipeout!' join(map(a:lines, {_, line -> split(line)[0]}))
endfunction

command! BD call fzf#run(fzf#wrap({
\ 'source': s:list_buffers(),
\ 'sink*': { lines -> s:delete_buffers(lines) },
\ 'options': '--multi --reverse --bind ctrl-a:select-all+accept'
\ }))

" bufferline {{{2
let g:bufferline_active_buffer_left = '['
let g:bufferline_active_buffer_right = ']'
let g:bufferline_fname_mod = ':.'
let g:bufferline_pathshorten = 1
let g:bufferline_rotate = 1

" UndoTree {{{2
let g:undotree_ShortIndicators = 1
let g:undotree_CustomUndotreeCmd = 'vertical 32 new'
let g:undotree_CustomDiffpanelCmd= 'belowright 12 new'

" Goyo {{{2

let g:goyo_width = 104

function! s:goyo_enter()
Limelight0.4
UndotreeToggle
" ...
endfunction

function! s:goyo_leave()
Limelight!
UndotreeToggle
" ...
endfunction

autocmd! User GoyoEnter nested call <SID>goyo_enter()
autocmd! User GoyoLeave nested call <SID>goyo_leave()

" FastFold {{{2
let g:markdown_folding = 1

" netrw {{{2
let g:netrw_winsize   = 30
let g:netrw_liststyle = 3