.vimrc

syntax on               " enable syntax highlighting
set cursorline          " highlight the current line
set ruler               " show line number in bar
set nobackup            " don't create pointless backup files; Use VCS instead
set autoread            " watch for file changes
set number              " show line numbers
set showcmd             " show selection metadata
set showmode            " show INSERT, VISUAL, etc. mode
set autoindent smartindent  " auto/smart indent
set smarttab            " better backspace and tab functionality
set scrolloff=5         " show at least 5 lines above/below
filetype on             " enable filetype detection
filetype indent on      " enable filetype-specific indenting
filetype plugin on      " enable filetype-specific plugins

" column-width visual indication
" tabs and indenting
set autoindent          " auto indenting
set smartindent         " smart indenting
set expandtab           " spaces instead of tabs
set tabstop=2           " 2 spaces for tabs
set shiftwidth=2        " 2 spaces for indentation

" bells
set noerrorbells        " turn off audio bell
set visualbell          " but leave on a visual bell

" search
set hlsearch            " highlighted search results
set showmatch           " show matching bracket

" other
set guioptions=aAace    " don't show scrollbar in MacVim

" clipboard
set clipboard=unnamed   " allow yy, etc. to interact with OS X clipboard

" remapped keys
inoremap {      {}<Left>
inoremap {<CR>  {<CR>}<Esc>O
inoremap {{     {
inoremap {}     {}

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

Plug 'scrooloose/nerdtree'
"Plug 'airblade/vim-gitgutter'
Plug 'tpope/vim-surround'
Plug 'zivyangll/git-blame.vim'
Plug 'Xuyuanp/nerdtree-git-plugin'
Plug 'tpope/vim-fugitive'
Plug 'arcticicestudio/nord-vim'
Plug 'leafgarland/typescript-vim'
Plug 'peitalin/vim-jsx-typescript'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'preservim/nerdcommenter'
Plug 'mhartington/oceanic-next'

call plug#end()

" Theme
let g:oceanic_next_terminal_bold = 1
let g:oceanic_next_terminal_italic = 1

colorscheme OceanicNext

" shortcuts
map <c-u> :call gitblame#echo()<cr>
" map <c-b> :nerdtreetoggle<cr>
nmap <c-b> :CocCommand explorer<cr>

autocmd VimEnter * :CocCommand explorer

set background=dark
set cmdheight=2
set updatetime=300
set shortmess+=c

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.
if has('nvim')
 inoremap <silent><expr> <C-Space> coc#refresh()
else
 inoremap <silent><expr> <C-Space> coc#refresh()
endif

inoremap <C-@> <C-Space>

" Make <CR> auto-select the first completion item and notify coc.nvim to
" format on enter, <cr> could be remapped by other vim plugin
inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

" 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>')
  elseif (coc#rpc#ready())
    call CocActionAsync('doHover')
  else
    execute '!' . &keywordprg . " " . expand('<cword>')
  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)

" Apply AutoFix to problem on the current line.
nmap <leader>qf <Plug>(coc-fix-current)

" 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>

nnoremap <C-j> :m .+1<CR>==
nnoremap <C-k> :m .-2<CR>==
inoremap <C-j> <Esc>:m .+1<CR>==gi
inoremap <C-k> <Esc>:m .-2<CR>==gi
vnoremap <C-j> :m '>+1<CR>gv=gv
vnoremap <C-k> :m '<-2<CR>gv=gv

" move between tabs using shifted H and L 
nnoremap H gT
nnoremap L gt 

vnoremap <C-r> "hy:%s/<C-r>h//gc<left><left><left>

map <Space> <Leader>