init.vim

set encoding=utf-8
set nocompatible
filetype off

call plug#begin('~/.config/nvim/plugged')
" Colorschemes
Plug 'dracula/vim', { 'as': 'dracula' }

" Language server client (until Neovim 0.5 ships)
Plug 'neoclide/coc.nvim', {'branch': 'release'}

" QoL Improvements
Plug 'kien/rainbow_parentheses.vim'
Plug 'itchyny/lightline.vim' " Better status line
Plug 'scrooloose/nerdtree'
Plug 'ctrlpvim/ctrlp.vim'

" Syntax highlighting
Plug 'sheerun/vim-polyglot'  " Causes trouble with Python f-strings
let g:polyglot_disabled = ['python']

" Python indenting
" Plug 'Vimjas/vim-python-pep8-indent'  " Causes trouble with Python f-strings


call plug#end()


" GENERAL SETTINGS
""""""""""""""""""""""""""""""
filetype plugin indent on
syntax enable
set number
set clipboard=unnamed " Share system clipboard.
set backspace=indent,eol,start " Make backspace behave normally.
set directory=/tmp// " swap files
set backupdir=/tmp//
set backupskip=/tmp/*,/private/tmp/*
set ffs=unix,dos,mac "Default file types
set nowrap        " don't wrap lines
set showmatch     " set show matching parenthesis
set ignorecase    " ignore case when searching
set smartcase     " ignore case if search pattern is all lowercase,
                  "  case-sensitive otherwise
set hlsearch      " highlight search terms
set incsearch     " show search matches as you type
set history=1000         " remember more commands and search history
set undolevels=1000      " use many muchos levels of undo
set title                " change the terminal's title
set visualbell           " don't beep
set noerrorbells         " don't beep

"" Special characters for hilighting non-priting spaces/tabs/etc.
set list listchars=tab:→\ ,trail:·

"" Tabs & spaces
set tabstop=4     " a tab is four spaces
set shiftwidth=4  " number of spaces to use for autoindenting
set softtabstop=4
set expandtab
set shiftround    " use multiple of shiftwidth when indenting with '<' and '>'
set smarttab      " insert tabs on the start of a line according to
                  "    shiftwidth, not tabstop
set autoindent    " always set autoindenting on
set copyindent    " copy the previous indentation on autoindenting

"" General Code Folding
set foldmethod=indent
set foldlevel=99

"" Normal regexes
nnoremap / /\v
vnoremap / /\v

"" Change leader
let mapleader = ","
let g:mapleader = ","

"" Get rid of search hilighting with ,/
nnoremap <silent> <leader>/ :nohlsearch<CR>

"" Fix those pesky situations where you edit & need sudo to save
cmap w!! w !sudo tee % >/dev/null

"" Better window/tab navigation
nnoremap <Left> <C-W>h
nnoremap <Right> <C-W>l
nnoremap <Up> <C-W>k
nnoremap <Down> <C-W>j

nnoremap <S-Left> gT
nnoremap <S-Right> gt

" Resize splits when the window is resized
au VimResized * exe "normal! \<c-w>="

"" Wildmenu completion
set wildmenu
set wildmode=list:longest
set wildignore+=.hg,.git,.svn                    " Version control
set wildignore+=*.aux,*.out,*.toc                " LaTeX intermediate files
set wildignore+=*.jpg,*.bmp,*.gif,*.png,*.jpeg   " binary images
set wildignore+=*.o,*.obj,*.exe,*.dll,*.manifest " compiled object files
set wildignore+=*.spl                            " compiled spelling word lists
set wildignore+=*.sw?                            " Vim swap files
set wildignore+=*.DS_Store                       " OSX bullshit
set wildignore+=*.luac                           " Lua byte code
set wildignore+=*.pyc                            " Python byte code
set wildignore+=**.class                          " Cursed Java class files


" COLORSCHEME
""""""""""""""""""""""""""""""
let $NVIM_TUI_ENABLE_TRUE_COLOR=1
set termguicolors
set background=dark " or light
colorscheme dracula
au VimEnter * colorscheme dracula


" PLUGIN SETTINGS
""""""""""""""""""""""""""""""

"" Language server client settings
" TextEdit might fail if hidden is not set.
set hidden

" Give more space for displaying messages.
set cmdheight=2

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

" Don't pass messages to |ins-completion-menu|.
set shortmess+=c

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
if has("patch-8.1.1564")
  " Recently vim can merge signcolumn and number column into one
  set signcolumn=number
else
  set signcolumn=yes
endif

" Use tab for trigger completion with characters ahead and navigate.
" NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
" other plugin before putting this into your config.
inoremap <silent><expr> <TAB>
      \ pumvisible() ? "\<C-n>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ coc#refresh()
inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"

function! s:check_back_space() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Use <c-space> to trigger completion.
inoremap <silent><expr> <c-space> coc#refresh()

" Use <cr> to confirm completion, `<C-g>u` means break undo chain at current
" position. Coc only does snippet and additional edit on confirm.
" <cr> could be remapped by other vim plugin, try `:verbose imap <CR>`.
if exists('*complete_info')
  inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"
else
  inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
endif

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

" 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>')
  else
    call CocAction('doHover')
  endif
endfunction

" 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)

augroup mygroup
  autocmd!
  " Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder.
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end

" Applying codeAction to the selected region.
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer.
nmap <leader>ac  <Plug>(coc-codeaction)
" Apply AutoFix to problem on the current line.
nmap <leader>qf  <Plug>(coc-fix-current)

" Map function and class text objects
" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
xmap if <Plug>(coc-funcobj-i)
omap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap af <Plug>(coc-funcobj-a)
xmap ic <Plug>(coc-classobj-i)
omap ic <Plug>(coc-classobj-i)
xmap ac <Plug>(coc-classobj-a)
omap ac <Plug>(coc-classobj-a)

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of LS, ex: coc-tsserver
nmap <silent> <C-s> <Plug>(coc-range-select)
xmap <silent> <C-s> <Plug>(coc-range-select)

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

" Add `:Fold` command to fold current buffer.
command! -nargs=? Fold :call     CocAction('fold', <f-args>)

" Add `:OR` command for organize imports of the current buffer.
command! -nargs=0 OR   :call     CocAction('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support.
" NOTE: Please see `:h coc-status` for integrations with external plugins that
" provide custom statusline: lightline.vim, vim-airline.
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

" Mappings for CoCList
" Show all diagnostics.
nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
" Manage extensions.
nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
" Show commands.
nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
" Find symbol of current document.
nnoremap <silent><nowait> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols.
nnoremap <silent><nowait> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent><nowait> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent><nowait> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list.
nnoremap <silent><nowait> <space>p  :<C-u>CocListResume<CR>

"" Rainbow Parentheses
au VimEnter * RainbowParenthesesToggle
au Syntax * RainbowParenthesesLoadRound
au Syntax * RainbowParenthesesLoadSquare
au Syntax * RainbowParenthesesLoadBraces

"" CtrlP Settings
let g:ctrlp_map = '<leader>s'
let g:ctrlp_cmd = 'CtrlP'

"" Lightline
" set t_Co=256
set noshowmode
let g:lightline = { 'colorscheme': 'one'}


"" HTML
autocmd FileType html setlocal shiftwidth=2