coc.nvim, neovim0.4.0 floating window

昨日typescriptをペアプロで教えてもらっているときにIDEだとここに型の説明でるからわかり易いということを言われた為ぼくは明日からIDEに移り、、、ません。（理由は察し、、早くて楽チンだから）
補完だけじゃなく、lsp対応してさらに説明も表示させちゃいましょう。


![demo2.gif](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/131847/3c1a45b0-c8b7-7a31-9588-ef15c0245657.gif)

![joe__tmux_a.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/131847/ac0ffd72-4b31-f8c8-01ac-e4cc7c8c388f.png)


### node.js
```sh
rm -rf ~/.yarn/
curl -sL install-node.now.sh/lts | sh
curl --compressed -o- -L https://yarnpkg.com/install.sh | zsh
```

### ~/.config/nvim/dein.toml
```toml
[[plugins]]
repo = 'neoclide/coc.nvim'
build = 'coc#util#install()'
hook_add = 'source ~/.config/nvim/coc-setting.vim'
```

### ~/.config/nvim/coc-setting.vim
```vim
" coc.nvim

" 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

" Smaller updatetime for CursorHold & CursorHoldI
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>"

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

" 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>)


" Add diagnostic info for https://github.com/itchyny/lightline.vim
let g:lightline = {
      \ 'colorscheme': 'wombat',
      \ 'active': {
      \   'left': [ [ 'mode', 'paste' ],
      \             [ 'cocstatus', 'readonly', 'filename', 'modified' ] ]
      \ },
      \ 'component_function': {
      \   'cocstatus': 'coc#status'
      \ },
      \ }

" 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>
```

```vim
:checkhealth
```

```
health#coc#check
========================================================================
  - OK: Environment check passed
  - OK: Javascript bundle found
  - OK: Service started
```

### ~/.config/nvim/coc-settings.json
```vim
:CocConfig
```

```json
{
  // 設定
}
```

[coc.nvim Extensions](https://github.com/neoclide/coc.nvim#extensions)

```vim
:CocInstall coc-<インストールしたいもの>
```

### 現在インストールされているプラグインリスト
```vim
:CocList extensions
```

# neovim0.4.0 floating window

~~brew unlink neovim~~
~~brew install neovim --HEAD~~

2019/06/04現在、変更されていたので追記
[NVIM nightly](https://github.com/neovim/neovim/releases/tag/nightly)

ダウンロード↓
[nvim-macos.tar.gz
](https://github.com/neovim/neovim/releases/download/nightly/nvim-macos.tar.gz)

```sh
cd ~/Downloads
tar xzvf nvim-macos.tar.gz
mv ~/Downloads/nvim-osx64 ~/.config/nvim/
```

# PATH追加
```sh
vi ~/.zshrc
```
```zsh
# NVIM nightly PATH
export PATH="$HOME/.config/nvim/nvim-osx64/bin:$PATH"
```
取り込まれたら時期見て外して。


### ~/.config/nvim/init.vim
```vim
" denite
nmap ; :Denite buffer -split=floating -winrow=1<CR>
nmap <leader>t :Denite file/rec -split=floating -winrow=1<CR>
nnoremap <leader>g :<C-u>Denite grep:. -no-empty -mode=normal<CR>
nnoremap <leader>j :<C-u>DeniteCursorWord grep:. -mode=normal<CR>
```