vimrc

" Installs vim-plug
if empty(glob('~/.vim/autoload/plug.vim'))
  silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs
    \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
endif

" Init vim-plug and the plugins
call plug#begin('~/.vim/plugged')
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'ekalinin/dockerfile.vim'
Plug 'tpope/vim-eunuch'
Plug 'tpope/vim-fugitive'
Plug 'tpope/vim-surround'
Plug 'tpope/vim-tbone'
Plug 'tpope/vim-scriptease'
Plug 'tmux-plugins/vim-tmux'
Plug 'hashivim/vim-terraform'
Plug 'glench/vim-jinja2-syntax'
Plug 'towolf/vim-helm'
Plug 'stephpy/vim-yaml'
Plug 'dracula/vim', { 'as': 'dracula' }
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
call plug#end()

" Custom config from coc.vim GitHub page

" May need for Vim (not Neovim) since coc.nvim calculates byte offset by count
" utf-8 byte sequence
set encoding=utf-8
" Some servers have issues with backup files, see #649
set nobackup
set nowritebackup

" Having longer updatetime (default is 4000 ms = 4s) leads to noticeable
" delays and poor user experience
set updatetime=300

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved
set signcolumn=yes

" Use tab for trigger completion with characters ahead and navigate
" NOTE: There's always complete item selected by default, you may want to enable
" no select by `"suggest.noselect": true` in your configuration file
" 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>
      \ coc#pum#visible() ? coc#pum#next(1) :
      \ CheckBackspace() ? "\<Tab>" :
      \ coc#refresh()
inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"

" Make <CR> to accept selected completion item or notify coc.nvim to format
" <C-g>u breaks current undo, please make your own choice
inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

function! CheckBackspace() 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-@> coc#refresh()
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 ShowDocumentation()<CR>

function! ShowDocumentation()
  if CocAction('hasProvider', 'hover')
    call CocActionAsync('doHover')
  else
    call feedkeys('K', 'in')
  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 code actions to the selected code block
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying code actions at the cursor position
nmap <leader>ac  <Plug>(coc-codeaction-cursor)
" Remap keys for apply code actions affect whole buffer
nmap <leader>as  <Plug>(coc-codeaction-source)
" Apply the most preferred quickfix action to fix diagnostic on the current line
nmap <leader>qf  <Plug>(coc-fix-current)

" Remap keys for applying refactor code actions
nmap <silent> <leader>re <Plug>(coc-codeaction-refactor)
xmap <silent> <leader>r  <Plug>(coc-codeaction-refactor-selected)
nmap <silent> <leader>r  <Plug>(coc-codeaction-refactor-selected)

" Run the Code Lens action on the current line
nmap <leader>cl  <Plug>(coc-codelens-action)

" 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)

" Remap <C-f> and <C-b> to scroll float windows/popups
if has('nvim-0.4.0') || has('patch-8.2.0750')
  nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
  inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
  inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
  vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
endif

" Use CTRL-S for selections ranges
" Requires 'textDocument/selectionRange' support of language server
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 CocActionAsync('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     CocActionAsync('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> <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>

" End of config from coc.vim GitHub page

let g:coc_global_extensions = [
      \'coc-diagnostic',
      \'coc-yaml',
      \'coc-vimlsp',
      \'coc-sh',
      \'coc-python',
      \'coc-markdownlint',
      \'coc-json',
      \'coc-go',
      \'coc-docker',
      \'coc-yank',
      \'coc-snippets',
      \'coc-highlight',
      \'coc-git'
      \]

filetype plugin indent on
set encoding=utf-8
set fileencoding=utf-8
set tabstop=2
set softtabstop=0
set expandtab
set shiftwidth=2
set smarttab
set number
set backspace=indent,eol,start
set background=dark
set hlsearch
set incsearch
set autoindent
set smartindent
set mouse=nicr
set mousehide
set hidden
highlight Pmenu ctermfg=Black ctermbg=DarkGray
highlight PmenuSel ctermfg=White ctermbg=Gray cterm=underline,bold
highlight PmenuSbar ctermfg=NONE ctermbg=DarkGray
highlight PmenuThumb ctermfg=Gray ctermbg=NONE

set list                    " Show invisible characters using listchars
set listchars=""            " Reset the listchars
set listchars=tab:›\        " show tabs as lsaquos
set listchars+=trail:·      " show trailing spaces as dots
set listchars+=nbsp:·       " show trailing non-breaking-spaces as dots
set listchars+=extends:❯    " The character in the last column when the line continues right
set listchars+=precedes:❮   " The character in the first column when the line continues left

nnoremap <F2> :set invpaste paste?<CR>
set pastetoggle=<F2>
set showmode

" F3 enables and disables the line numbering inside ViM
noremap <F3> :set invnumber<CR>
inoremap <F3> <C-O>:set invnumber<CR>

nnoremap <C-Left> :bprevious<CR>
nnoremap <C-Right> :bnext<CR>

nnoremap <F4> :call ToggleSignColumn()<CR>

"Remove all trailing whitespace by pressing F5
nnoremap <F5> :let _s=@/<Bar>:%s/\s\+$//e<Bar>:let @/=_s<Bar><CR>

" Toggle signcolumn. Works only on vim>=8.0 or NeoVim
function! ToggleSignColumn()
    if !exists("b:signcolumn_on") || b:signcolumn_on
        set signcolumn=no
        let b:signcolumn_on=0
    else
        set signcolumn=auto
        let b:signcolumn_on=1
    endif
endfunction

" Save cursor pointer location
if has("autocmd")
  au BufReadPost * if line("'\"") > 0 && line("'\"") <= line("$") | exe "normal! g`\"" | endif
endif

" Put plugins and dictionaries in this dir
let vimDir = '$HOME/.vim'

if stridx(&runtimepath, expand(vimDir)) == -1
  " vimDir is not on runtimepath, add it
  let &runtimepath.=','.vimDir
endif

" Keep undo history across sessions by storing it in a file
if has('persistent_undo')
    let myUndoDir = expand(vimDir . '/undodir')
    silent call system('mkdir -p ' . myUndoDir)
    let &undodir = myUndoDir
    set undofile
endif

"" START: auto paste-mode when pasting in INSERT mode with support for TMUX
"" Source: https://coderwall.com/p/if9mda/automatically-set-paste-mode-in-vim-when-pasting-in-insert-mode
"function! WrapForTmux(s)
"  if !exists('$TMUX')
"    return a:s
"  endif
"
"  let tmux_start = "\<Esc>Ptmux;"
"  let tmux_end = "\<Esc>\\"
"
"  return tmux_start . substitute(a:s, "\<Esc>", "\<Esc>\<Esc>", 'g') . tmux_end
"endfunction
"
"let &t_SI .= WrapForTmux("\<Esc>[?2004h")
"let &t_EI .= WrapForTmux("\<Esc>[?2004l")
"
"function! XTermPasteBegin()
"  set pastetoggle=<Esc>[201~
"  set paste
"  return ""
"endfunction
"
"inoremap <special> <expr> <Esc>[200~ XTermPasteBegin()
"" END: auto paste-mode when pasting in INSERT mode with support for TMUX