.vimrc 2020-5-9

" ================================================================

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

" Editing Enhancement
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'liuchengxu/vista.vim'
Plug 'junegunn/vim-easy-align'

" GUI Enhancement
Plug 'itchyny/lightline.vim'
Plug 'junegunn/seoul256.vim'

Plug 'scrooloose/nerdtree'
Plug 'scrooloose/nerdcommenter'
Plug 'Xuyuanp/nerdtree-git-plugin'
Plug 'Shougo/deol.nvim'
" Plug 'SirVer/ultisnips' | Plug 'honza/vim-snippets'
" Plug 'Shougo/neosnippet.vim' | Plug 'Shougo/neosnippet-snippets'

call plug#end()




" ================================================================
" # coc.nvim Settings
" ================================================================

" 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>

" Comments for json file
autocmd FileType json syntax match Comment +\/\/.\+$+




" ================================================================
" # Other Plugin Settigs
" ================================================================

" # Settings for lightline.vim
set laststatus=2

" # Settings for seoul256.vim
let g:seoul256_background=235
let g:seoul256_srgb=1
colo seoul256

" # Settings for UltiSnips
let g:UltiSnipsExpandTrigger="<C-k>"



" ================================================================
" # Regular Vim settings
" ================================================================

" Force use xTerm 256 coloring
if !has('gui_running')
  set t_Co=256
endif

" Visual stuff
set number
set relativenumber
set nowrap

" Permanent undo
set undodir=~/.vim/undo
set undofile

" Tab configuration
set shiftwidth=2
set softtabstop=2
set tabstop=2
set noexpandtab

" Keymap for saving files
nnoremap <leader>s :w<CR>
nnoremap <leader>sa :wa<CR>

" Keymap for toggling paste mode
nnoremap <leader>p :set paste<CR>
nnoremap <leader>np :set nopaste<CR>

" Esc to unfocus from Deol.nvim terminal
tnoremap <Esc> <C-\><C-n>

" Ctrl+J to switch to normal mode
inoremap <C-j> <Esc>
vnoremap <C-j> <Esc>

" Force set language regardless of system language
set langmenu=en_US
let $LANG = 'en_US'
source $VIMRUNTIME/delmenu.vim
source $VIMRUNTIME/menu.vim

" Open NerdTree hotkey in the directory of the current open file ('%')
nmap <leader>ne :NERDTree<CR>
nmap <leader>nc :NERDTree %<CR>
" Open deol.nvim terminal hotkey
nmap <leader>to :Deol<CR>

" Enable mouse mode
set mouse=a

" Search visual selection
vnoremap // y/\V<C-R>=escape(@",'/\')<CR><CR>s
" Close all search highlights
nnoremap <leader>noh :noh<CR>