nvim config

"""""""""""""""""""""""""""""""""""""""""""""""
"Install Plugins
"""""""""""""""""""""""""""""""""""""""""""""""
call plug#begin('~/.vim/plugged')

" Themes
" https://github.com/haishanh/night-owl.vim
Plug 'haishanh/night-owl.vim'

" https://github.com/jiangmiao/auto-pairs
Plug 'jiangmiao/auto-pairs'

" https://github.com/scrooloose/nerdcommenter
Plug 'scrooloose/nerdcommenter'

" NERDTree - File explorer: https://github.com/scrooloose/nerdtree
Plug 'scrooloose/nerdtree'
Plug 'Xuyuanp/nerdtree-git-plugin'

" https://github.com/neoclide/coc.nvim
Plug 'neoclide/coc.nvim', {'branch': 'release'}

" https://github.com/mattn/emmet-vim
Plug 'mattn/emmet-vim'

"https://github.com/Yggdroot/indentLine
Plug 'Yggdroot/indentLine'

" Status Table https://github.com/vim-airline/vim-airline
Plug 'vim-airline/vim-airline'
" Theme for Airline: https://github.com/vim-airline/vim-airline-themes
Plug 'vim-airline/vim-airline-themes'

" https://github.com/jordwalke/vim-reasonml
Plug 'jordwalke/vim-reasonml'

" https://github.com/peitalin/vim-jsx-typescript
Plug 'leafgarland/typescript-vim'
Plug 'peitalin/vim-jsx-typescript'

" https://github.com/pangloss/vim-javascript
Plug 'pangloss/vim-javascript'

" https://github.com/kien/ctrlp.vim
Plug 'kien/ctrlp.vim'

" https://github.com/reasonml-editor/vim-reason-plus
Plug 'reasonml-editor/vim-reason-plus'
" https://github.com/autozimu/LanguageClient-neovim
Plug 'autozimu/LanguageClient-neovim', {
    \ 'branch': 'next',
    \ 'do': 'bash install.sh',
    \ }
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }

" for neovim
if has('nvim')
  Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
" for vim 8 with python
else
  Plug 'Shougo/deoplete.nvim'
  Plug 'roxma/nvim-yarp'
  Plug 'roxma/vim-hug-neovim-rpc'
  " the path to python3 is obtained through executing `:echo exepath('python3')` in vim
  let g:python3_host_prog = "/usr/bin/python3"
endif



call plug#end()

"""""""""""""""""""""""""""""""""""""""""""""""
"General
"""""""""""""""""""""""""""""""""""""""""""""""
let mapleader = "\<Space>"
set number
set tabstop=2
set shiftwidth=2
set expandtab

" Always center cursor on screen
augroup VCenterCursor
  au!
  au BufEnter,WinEnter,WinNew,VimResized *,*.*
        \ let &scrolloff=winheight(win_getid())/2
augroup END

"""""""""""""""""""""""""""""""""""""""""""""""
"Theme Setup
"""""""""""""""""""""""""""""""""""""""""""""""

if (has("termguicolors"))
 set termguicolors
endif

" For Neovim 0.1.3 and 0.1.4
let $NVIM_TUI_ENABLE_TRUE_COLOR=1

syntax enable
colorscheme night-owl

"""""""""""""""""""""""""""""""""""""""""""""""
"Nerd Commenter settings
"""""""""""""""""""""""""""""""""""""""""""""""
filetype plugin on
" Add spaces after comment delimiters by default
let g:NERDSpaceDelims = 1

" Use compact syntax for prettified multi-line comments
let g:NERDCompactSexyComs = 1

" Align line-wise comment delimiters flush left instead of following code indentation
let g:NERDDefaultAlign = 'left'

" Set a language to use its alternate delimiters by default
let g:NERDAltDelims_java = 1

" Add your own custom formats or override the defaults
let g:NERDCustomDelimiters = { 'c': { 'left': '/**','right': '*/' } }

" Allow commenting and inverting empty lines (useful when commenting a region)
let g:NERDCommentEmptyLines = 1

" Enable trimming of trailing whitespace when uncommenting
let g:NERDTrimTrailingWhitespace = 1

" Enable NERDCommenterToggle to check all selected lines is commented or not 
let g:NERDToggleCheckAllLines = 1

"""""""""""""""""""""""""""""""""""""""""""""""
"Language Servers
"""""""""""""""""""""""""""""""""""""""""""""""
" Automatically start language servers.
let g:LanguageClient_autoStart = 1

let g:LanguageClient_serverCommands = {
    \ 'reason': ['/home/logan/system/apps/reason-language-server']
    \ }

" enable autocomplete
let g:deoplete#enable_at_startup = 1

nnoremap <silent> gd :call LanguageClient#textDocument_definition()<cr>
nnoremap <silent> gf :call LanguageClient#textDocument_formatting()<cr>
nnoremap <silent> <cr> :call LanguageClient#textDocument_hover()<cr>

"""""""""""""""""""""""""""""""""""""""""""""""
"IndentLine settings
"""""""""""""""""""""""""""""""""""""""""""""""
let g:indentLine_char_list = ['|', '¦', '┆', '┊']

"""""""""""""""""""""""""""""""""""""""""""""""
"Airline, Status table setup
"""""""""""""""""""""""""""""""""""""""""""""""

let g:airline#extensions#tabline#enabled = 1
let g:airline_theme='solarized'

"""""""""""""""""""""""""""""""""""""""""""""""
"NERDTree setup
"""""""""""""""""""""""""""""""""""""""""""""""
"How can I open a NERDTree automatically when vim starts up if no files were specified?
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif

"How can I open NERDTree automatically when vim starts up on opening a directory?
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists("s:std_in") | exe 'NERDTree' argv()[0] | wincmd p | ene | exe 'cd '.argv()[0] | endif

"""""""""""""""""""""""""""""""""""""""""""""""
"COC Recommended setup
"""""""""""""""""""""""""""""""""""""""""""""""

" if hidden is not set, TextEdit might fail.
set hidden

" Some servers have issues with backup files, see #649
set nobackup
set nowritebackup

" Better display for messages
set cmdheight=2

" You will have bad experience for diagnostic messages when it's default 4000.
set updatetime=300

" don't give |ins-completion-menu| messages.
set shortmess+=c

" always show signcolumns
set signcolumn=yes

" Use tab for trigger completion with characters ahead and navigate.
" Use command ':verbose imap <tab>' to make sure tab is not mapped by other plugin.
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.
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
" Or use `complete_info` if your vim support it, like:
" inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"

" Use `[g` and `]g` to navigate diagnostics
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)

" Remap keys for gotos
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 symbol under cursor on CursorHold
autocmd CursorHold * silent call CocActionAsync('highlight')

" Remap for rename current word
nmap <leader>rn <Plug>(coc-rename)

" Remap for format selected region
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

" Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap for do codeAction of current line
nmap <leader>ac  <Plug>(coc-codeaction)
" Fix autofix problem of current line
nmap <leader>qf  <Plug>(coc-fix-current)

" Create mappings for function text object, requires document symbols feature of languageserver.
xmap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap if <Plug>(coc-funcobj-i)
omap af <Plug>(coc-funcobj-a)

" Use <C-d> for select selections ranges, needs server support, like: coc-tsserver, coc-python
nmap <silent> <C-d> <Plug>(coc-range-select)
xmap <silent> <C-d> <Plug>(coc-range-select)

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

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

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

" Add status line support, for integration with other plugin, checkout `:h coc-status`
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

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