VIM: grep in a popup and select for open, with fzf plugin

vim-key-bindings-for-grep-with-fzf-plugin.vim

" the key bindings are just as examples, for personal prefer

let fzf_installed = 0

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

  " NOTICE: you should add this part into your plugin#begin() .. plug#end() block

  Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
  Plug 'junegunn/fzf.vim'
  nnoremap <C-T>z :FZF<CR>
  let g:fzf_action = { 'enter': 'split', }
  let fzf_installed = 1

call plug#end()


if fzf_installed
  " See `--tmux` option in `man fzf` for available options
  " [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
  if exists('$TMUX')
    let g:fzf_layout = { 'tmux': '90%,80%' }
  else
    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.8 } }
  endif

  function! FzfGrepWithPrompt(with_more_argument=0, whole_word=0, list_files=0, ignore_case=0)
    let word = expand('<cword>')

    let grep_command = 'grep -r'
    if a:ignore_case
      let grep_command .= 'i'
    endif
    if a:whole_word
      let grep_command .= 'w'
    endif
    if a:list_files
      let grep_command .= 'l'
    else
      let grep_command .= 'n'
    endif

    if a:with_more_argument
      let extra_args = input(grep_command . ' ' . word . ' ', '', 'file')
    else
      let extra_args = ''
    endif

    " Combine the command and send it to fzf
    let command = grep_command . ' ' . word . ' ' . extra_args
    " echo command
    " echom command

    call fzf#vim#grep(command, fzf#vim#with_preview(), 0)
  endfunction

  nnoremap <silent> <C-K> :call FzfGrepWithPrompt()<CR>
  nnoremap <silent> <C-K>? :call FzfGrepWithPrompt(1)<CR>
  nnoremap <silent> <C-K><C-K> :call FzfGrepWithPrompt(0)<CR>
  nnoremap <silent> <C-K><C-K>? :call FzfGrepWithPrompt(1)<CR>
  nnoremap <silent> <silent> <C-K>l :call FzfGrepWithPrompt(0, 0, 1)<CR>
  nnoremap <silent> <C-K>l? :call FzfGrepWithPrompt(1, 0, 1)<CR>
  nnoremap <silent> <silent> <C-K><C-L> :call FzfGrepWithPrompt(0, 0, 1)<CR>
  nnoremap <silent> <C-K><C-L>? :call FzfGrepWithPrompt(1, 0, 1)<CR>
  nnoremap <silent> <C-K>w :call FzfGrepWithPrompt(0, 1)<CR>
  nnoremap <silent> <C-K>w? :call FzfGrepWithPrompt(1, 1)<CR>
  nnoremap <silent> <C-K><C-W> :call FzfGrepWithPrompt(0, 1)<CR>
  nnoremap <silent> <C-K><C-W>? :call FzfGrepWithPrompt(1, 1)<CR>
else
  nnoremap <silent> <C-K> :!grep -r <C-R><C-W><CR>
  nnoremap <C-K>? :!grep -r <C-R><C-W><Space>
  nnoremap <silent> <C-K><C-K> :!grep -r <C-R><C-W><CR>
  nnoremap <C-K><C-K>? :!grep -r <C-R><C-W><Space>
  nnoremap <silent> <C-K>l :!grep -rl <C-R><C-W><CR>
  nnoremap <C-K>l? :!grep -rl <C-R><C-W><Space>
  nnoremap <silent> <C-K><C-L> :!grep -rl <C-R><C-W><CR>
  nnoremap <C-K><C-L>? :!grep -rl <C-R><C-W><Space>
  nnoremap <silent> <C-K>w :!grep -rw <C-R><C-W><CR>
  nnoremap <C-K>w? :!grep -rw <C-R><C-W><Space>
  nnoremap <silent> <C-K><C-W> :!grep -rw <C-R><C-W><CR>
  nnoremap <C-K><C-W>? :!grep -rw <C-R><C-W><Space>
endif