.vimrc

syntax on

set noerrorbells
set shiftwidth=2
set expandtab
set smartindent
set nu
set nowrap
set smartcase
set noswapfile
set nobackup
set nobackup
set undodir=~/.vim/undodir
set undofile
set incsearch
set laststatus=2
set showtabline=2
set scrolloff=8 " Keep 8 lines below and above the cursor
" set relativenumber
" Highlight search results
set hls is 
set cursorline
" Vim True Color support
set termguicolors
" set spell " Now using iamcco/coc-spell-checker

" === TAB/Space settings === "
" Insert spaces when TAB is pressed.
set expandtab
" Change number of spaces that a <Tab> counts for during editing ops
set tabstop=2 softtabstop=2

" === Completion Settings === "
" Don't give completion messages like 'match 1 of 2'
" or 'The only match'
set shortmess+=c

" Update term title but restore old title after leaving Vim
set title
set titleold=

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

" Plug 'dracula/vim'
Plug 'morhetz/gruvbox'

Plug 'jremmen/vim-ripgrep'
Plug 'tpope/vim-fugitive'
Plug 'airblade/vim-gitgutter'
" Plug 'leafgarland/typescript-vim'
Plug 'vim-utils/vim-man'
" Plug 'lyuts/vim-rtags'
Plug 'ctrlpvim/ctrlp.vim'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
" Plug 'mbbill/undotree'
" Plug 'prettier/vim-prettier', { 'do': 'yarn install' }
Plug 'preservim/nerdtree'
Plug 'vim-airline/vim-airline'
Plug 'sheerun/vim-polyglot'
Plug 'dhruvasagar/vim-open-url'
" Plug 'mattn/emmet-vim'
" Plug 'yuttie/comfortable-motion.vim'

call plug#end()

" colorscheme dracula
colorscheme gruvbox
set background=dark
" set background=light

" Override colorcolumn settings
set colorcolumn=80
" highlight ColorColumn

if executable('rg')
  let g:rg_derive_root='true'
endif

let g:ctrlp_user_command = ['.git/', 'git --git-dir=%s/.git ls-files -oc --exclude-standard']
let mapleader = " "
let g:user_emmet_leader_key="<C-M>"
let g:netrw_browse_split=2
" let g:netrw_banner=0

" ag is fast enough that CtrlP doesn't need to cache "
let g:ctrlp_use_caching = 0
let g:netrw_winsize = 25
" Ctrlp won't open files in the default initial NERDTree window. #78 https://github.com/kien/ctrlp.vim/issues/78
let g:ctrlp_dont_split = 'nerdtree'

" Credit: https://stackoverflow.com/a/5373376/1904043
" xnoremap <silent><nowait> <leader>y <esc>:silent'<,'>:w !dsync<CR>
let g:open_url_browser_default = "dsync open"
let g:netrw_browsex_viewer = "dsync open"
" let g:fugitive_browse_handlers = ["dsync open"]
let g:open_url#engines#default = "google"



"***************************************************
" key bindings
" ref doc: https://vi.stackexchange.com/a/7723
nnoremap <c-a> :Ag<SPACE>
nnoremap fh :wincmd h<CR>
nnoremap fj :wincmd j<CR>
nnoremap fk :wincmd k<CR>
nnoremap fl :wincmd l<CR>

nnoremap <C-t> :tabnew<CR>
nnoremap <C-h> :tabprevious<CR>
nnoremap <C-l> :tabnext<CR>
nnoremap <C-q> :q<CR>
nnoremap <Leader>w :w<CR>
nnoremap <Leader>W :wq<CR>
nnoremap <Leader>m :CtrlPMRU<CR>

if has('nvim')
  nnoremap <leader>t :terminal<CR>

  " Support ESC to jump out of terminal
  au TermOpen * tnoremap <buffer> <Esc> <c-\><c-n>
  " If in fzf, ESC to close buffer
  au FileType fzf tunmap <buffer> <Esc>

  augroup neovim_terminal
    autocmd!
    " Enter Terminal-mode (insert) automatically
    autocmd TermOpen * startinsert
    " Disables number lines on terminal buffers
    " autocmt
    " TermOpen * :set nonumber norelativenumber
  augroup END
endif

" CocInstall coc-spell-checker
nnoremap zg :CocCommand cSpell.addWordToUserDictionary<CR>

" for: dhruvasagar/vim-open-url
noremap <leader>u gB<cr>

nnoremap <Leader>n :NERDTreeFind<CR>
nnoremap <Leader>km :Filetypes<CR>
xnoremap <Leader>y "+y<CR> " copy to system clipboard


noremap <C-n> :NERDTreeToggle<CR>
" How can I close vim if the only window left open is a NERDTree?
" autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
" let g:NERDTreeDirArrowExpandable = '>'
" let g:NERDTreeDirArrowCollapsible = 'v'
" 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
" What if I'm also opening a saved session, for example vim -S session_file.vim? I don't want NERDTree to open in that scenario.
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 0 && !exists("s:std_in") && v:this_session == "" | NERDTree | endif

" autocmd BufReadPre * 



"***************************************************
" custom functions
function! s:DiffWithSaved()
  let filetype=&ft
  diffthis
  vnew | r # | normal! 1Gdd
  diffthis
  exe "setlocal bt=nofile bh=wipe nobl noswf ro ft=" . filetype
endfunction
com! DiffSaved call s:DiffWithSaved()
noremap <leader>s :DiffSaved<CR>

" custom functions - END
"***************************************************


"***************************************************
"***************************************************
"***************************************************
"***************************************************
"***************************************************
"***************************************************
" coc.nvim config
" TextEdit might fail if hidden is not set.
set hidden

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

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