dotfiles/init.vim

" Pas de compatibilité a VI !
set nocompatible

" PLUGNIS ###########################################################{{{
call plug#begin()

" Conquer of Completion
Plug 'neoclide/coc.nvim', {'branch': 'release'}

" General plugins
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'https://gitea.tforgione.fr/tforgione/peach.git'
Plug 'scrooloose/nerdtree'
Plug 'tpope/vim-abolish'

" Language specific plugins

" Rust
Plug 'rust-lang/rust.vim'

" Elm
Plug 'ElmCast/elm-vim'

" Toml
Plug 'cespare/vim-toml'

" Pug
Plug 'digitaltoad/vim-pug'

" Spandex
Plug 'rust-spandex/spandex.vim'

call plug#end()

" Line numbers and syntaxic coloration
" set nu
" syntax on

" Highlight bad spaces (not working...)
" }}}

" INDENTATION #######################################################{{{
set expandtab
set tabstop=4
set shiftwidth=4
set autoindent
set tw=120
" }}}

" UI CONFIG #########################################################{{{
set number
if $NVIM_LINE_NUMBER == 'rnu'
    set rnu
endif
set showcmd
set wildmenu
set lazyredraw
set encoding=utf8
set clipboard=unnamedplus
set updatecount=50
set mouse=a
set guicursor=
" set ttymouse=sgr
" Espaces insécables grrrr
set list
set listchars=tab:  ,trail:·,extends:>,precedes:<,nbsp:¬
" Remove trailing spaces
autocmd BufWritePre * :%s/\s\+$//e

" Compile on F12
if executable('mars')
    nnoremap <silent><F12> :wa \| !mars -p %:p<CR>
    inoremap <silent><F12> <C-O>:wa \|!mars -p %:p<CR>
    vnoremap <silent><F12> :wa \|!mars -p %:p<CR>
elseif executable('make')
    nnoremap <silent><F12> :wa \| !make -p %:p<CR>
    inoremap <silent><F12> <C-O>:wa \|!make -p %:p<CR>
    vnoremap <silent><F12> :wa \|!make -p %:p<CR>
endif

" Escape on F1
map <F1> <Esc>
imap <F1> <Esc>
" vim airline config
set laststatus=2
let g:airline_powerline_fonts = 1
let g:airline#extensions#branch#format = 1
let g:airline_theme='dark'
set t_Co=256
" Set textwidth for latex
" autocmd FileType tex set textwidth=79
" }}}

" COLOR #############################################################{{{
set background=dark
syntax enable
try
    colorscheme peach
catch
endtry
highlight BadWhitespace ctermbg=red guibg=red
match BadWhitespace / \| \+\t/
" }}}

" SEARCHING #########################################################{{{
set title
set showmatch
set hlsearch
set noincsearch
" }}}

" NERDTREE ##########################################################{{{
let NERDTreeIgnore = ['\.pyc$','__pycache__']
set shell=zsh
let g:NERDTreeIndicatorMapCustom = {
    \ "Modified"  : "✹",
    \ "Staged"    : "✚",
    \ "Untracked" : "✭",
    \ "Renamed"   : "➜",
    \ "Unmerged"  : "═",
    \ "Deleted"   : "✖",
    \ "Dirty"     : "✗",
    \ "Clean"     : "✔︎",
    \ "Unknown"   : "?"
    \ }
let g:WebDevIconsNerdTreeGitPluginForceVAlign = 1
" }}}

" BACKUPS ###########################################################{{{
set dir=$HOME/.nvim/swp//
autocmd BufWritePost * :silent execute ':w! ' ."$HOME/.nvim/backups/" . substitute(escape(substitute(expand('%:p'), "/", "%", "g"), "%"), ' ', '\\ ', 'g')

if exists('+undofile')
    set undofile
    set undolevels=1000
    set undoreload=10000
    if exists('+undodir')
        set undodir=$HOME/.nvim/undo
    endif
endif
" }}}


" MARKDOWN PREVIEW ##################################################{{{
let g:markdown_composer_browser = 'firefox'
let g:instant_markdown_autostart = 0
" }}}

" COC CONFIG ########################################################{{{

" Use `[g` and `]g` to navigate diagnostics
" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
nmap <silent> gp <Plug>(coc-diagnostic-prev)
nmap <silent> gn <Plug>(coc-diagnostic-next)

" GoTo code navigation.
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Add `:Format` command to format current buffer.
command! -nargs=0 Format :call CocAction('format')

" Use K to show documentation in preview window.
nnoremap <silent> K :call <SID>show_documentation()<CR>


function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  elseif (coc#rpc#ready())
    call CocActionAsync('doHover')
  else
    execute '!' . &keywordprg . " " . expand('<cword>')
  endif
endfunction

" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
" delays and poor user experience.
set updatetime=300

" Highlight the symbol and its references when holding the cursor.
autocmd CursorHold * silent call CocActionAsync('highlight')

" Symbol renaming.
nmap <leader>rn <Plug>(coc-rename)

" Formatting selected code.
xmap <leader>f  <Plug>(coc-format-selected)
nmap <leader>f  <Plug>(coc-format-selected)

" Autoclose preview
autocmd CursorMovedI * if pumvisible() == 0|pclose|endif
autocmd InsertLeave * if pumvisible() == 0|pclose|endif

" Complete on tab
" inoremap <expr><TAB>  pumvisible() ? "\<C-n>" : "\<TAB>"
function! s:check_back_space() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~ '\s'
endfunction

" Insert <tab> when previous text is space, refresh completion if not.
inoremap <silent><expr> <TAB>
  \ coc#pum#visible() ? coc#pum#next(1):
  \ <SID>check_back_space() ? "\<Tab>" :
  \ coc#refresh()
inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"
" }}}

" CUSTOM THINGS DEPENDING ON ENV ####################################{{{
let g:rustfmt_autosave = 1