Floating Windows Support From Neovim

[Piping]

Hi @junegunn

Neovim patch from @bfredl has a working version of floating windows implementation now.

Is it possible to add a split direction like float and then open fzf inside floating windows.

Here is a reference

[junegunn]

You can pass an arbitrary command as window option.

function! Foo()
  tabnew
  " or whatever
endfunction

call fzf#run({'window': 'call Foo()'})

See https://github.com/junegunn/fzf/blob/master/README-VIM.md#fzfrun for details.

[Piping]

@junegunn Thanks a bunch

[Piping]

function! Foo()
     if exists('*nvim_open_float_win')
         let b = nvim_create_buf(v:false)
         call nvim_buf_set_option(b, "buftype", "nofile")
         call nvim_buf_set_lines(b,0,-1,v:true,["test"])
         let opts = {'x':100, 'y':5, 'anchor': 'NE'}
         let w =  nvim_open_float_win(b,v:false,60,20,opts)
         hi Floating guibg=#000000
         call setwinvar(w, '&winhl', 'Normal:Floating')
         call setwinvar(w, '&number', 0)
     endif
 endfunction
 call fzf#run({'window': 'call Foo()'})

I tried the following script, but fzf windows is not opened inside the floating windows, any idea?

How does fzf window option locate the window?

[junegunn]

It opens in the "current" window where your cursor is positioned.

[bfredl]

@Piping change v:false to v:true in the open float call.

[Piping]

@bfredl Thanks!

This is what I got!

@junegunn
Awesome.

Although if I adjust the gui terminal size, the nvim crashed.

nvim: ../src/nvim/ui_compositor.c:226: compose_line: Assertion `until <= default_grid.Columns' failed.

@bfredl

[kassio]

I got a nice result with the following:

let g:fzf_layout = { 'window': 'call FloatingFZF()' }
function! FloatingFZF()
  let buf = nvim_create_buf(v:false, v:true)
  call setbufvar(buf, '&signcolumn', 'no')

  let winheight = winheight(0)
  let winwidth = winwidth(0)

  let width = float2nr(winwidth-(winwidth*2/10))

  let opts = {
        \ 'relative': 'editor',
        \ 'row': &lines - 3,
        \ 'col': float2nr((winwidth-width)/2),
        \ 'width': width,
        \ 'height': &lines - 3
        \ }

  call nvim_open_win(buf, v:true, opts)
endfunction

I was trying to achieve a different visual with the "input" in the top and the list of files in a top-down layout, but with the current fzf customization tools I didn't find a way to do it.

[kassio]

little change to keep the floating window centralized horizontally, regardless of any vertical splits.

function! FloatingFZF()
  let buf = nvim_create_buf(v:false, v:true)
  call setbufvar(buf, '&signcolumn', 'no')

  let width = float2nr(&columns - (&columns * 2 / 10))
  let height = &lines - 3
  let y = &lines - 3
  let x = float2nr((&columns - width) / 2)

  let opts = {
        \ 'relative': 'editor',
        \ 'row': y,
        \ 'col': x,
        \ 'width': width,
        \ 'height': height
        \ }

  call nvim_open_win(buf, v:true, opts)
endfunction

[junegunn]

a different visual with the "input" in the top and the list of files in a top-down layout

See Layout section in the man page.

[kassio]

Thanks @junegunn, I got the visual that I wanted:

let $FZF_DEFAULT_OPTS='--layout=reverse'
let g:fzf_layout = { 'window': 'call FloatingFZF()' }

function! FloatingFZF()
  let buf = nvim_create_buf(v:false, v:true)
  call setbufvar(buf, '&signcolumn', 'no')

  let height = &lines - 3
  let width = float2nr(&columns - (&columns * 2 / 10))
  let col = float2nr((&columns - width) / 2)

  let opts = {
        \ 'relative': 'editor',
        \ 'row': 1,
        \ 'col': col,
        \ 'width': width,
        \ 'height': height
        \ }

  call nvim_open_win(buf, v:true, opts)
endfunction

[taigacute]

@kassio hi i use this function， how to hide line number in float window？setlocal nonumber ? where it should be write

[sassanh]

change

call nvim_open_win(buf, v:true, opts)

to

let win = nvim_open_win(buf, v:true, opts)
call setwinvar(win, '&number', 0)

[taigacute]

@sassanh nothing change.

[sassanh]

It's working for me:

    let win = nvim_open_win(l:buf, v:true, l:opts)
    call timer_start(0, {-> execute(':call setwinvar(' . l:win . ', "&number", 1)')})

And this (not changing anything in the function):

autocmd! FileType fzf
autocmd  FileType fzf setlocal nonumber

[kassio]

You can use:

  au FileType fzf set nonu nornu

Just saw that @sassanh already mention that, sorry for the noise.

[taigacute]

@kassio @sassanh add this call setwinvar(win, '&relativenumber', 0),works well,by the way how to change fzf backgournd highlight.

[sassanh]

Put this at the end of your init.vim (or just after color scheme is set in your init.vim)

highlight NormalFloat cterm=NONE ctermfg=14 ctermbg=0 gui=NONE guifg=#93a1a1 guibg=#002931

[AhmedAbdulrahman]

Hi @kassio Thanks for the cool tips, do you know how can I get ride of that annoying Flashing background color when I open fzf ?

[dagadbm]

" floating fzf
if has('nvim')
  let $FZF_DEFAULT_OPTS .= ' --layout=reverse'

  function! FloatingFZF()
    let buf = nvim_create_buf(v:false, v:true)

   " here be dragoons
    let height = &lines
    let width = float2nr(&columns - (&columns * 2 / 10))
    let col = float2nr((&columns - width) / 2)
    let col_offset = &columns / 10
    let opts = {
          \ 'relative': 'editor',
          \ 'row': 1,
          \ 'col': col + col_offset,
          \ 'width': width * 2 / 1,
          \ 'height': height / 2
          \ }

    let win = nvim_open_win(buf, v:true, opts)
    call setwinvar(win, '&winhl', 'NormalFloat:TabLine')

  " this is to remove all line numbers and so on from the window
    setlocal
          \ buftype=nofile
          \ nobuflisted
          \ bufhidden=hide
          \ nonumber
          \ norelativenumber
          \ signcolumn=no
  endfunction

  let g:fzf_layout = { 'window': 'call FloatingFZF()' }
endif

this is a mix from junegunn dotfiles, comment from this thread and space-vim config
although i have no idea what this does exactly but it seems to work.

if you guys have better alternatives do share here !

[Karmenzind]

call setwinvar(win, '&winhl', 'NormalFloat:TabLine') will be better @dagadbm

[kassio]

@AhmedAbdulrahman is that still happening? For me, it's not happening. 🤷‍♂

[dagadbm]

call setwinvar(win, '&winhl', 'NormalFloat:TabLine') will be better @dagadbm

changed it!

why is it better?

[alfunx]

You usually don't need the setlocal stuff anymore if you set the minimal stile in opts, e.g.:

" floating fzf
if has('nvim')
  let $FZF_DEFAULT_OPTS .= ' --layout=reverse'

  function! FloatingFZF()
    let height = &lines
    let width = float2nr(&columns - (&columns * 2 / 10))
    let col = float2nr((&columns - width) / 2)
    let col_offset = &columns / 10
    let opts = {
          \ 'relative': 'editor',
          \ 'row': 1,
          \ 'col': col + col_offset,
          \ 'width': width * 2 / 1,
          \ 'height': height / 2,
          \ 'style': 'minimal'
          \ }
    let buf = nvim_create_buf(v:false, v:true)
    let win = nvim_open_win(buf, v:true, opts)
    call setwinvar(win, '&winhl', 'NormalFloat:TabLine')
  endfunction

  let g:fzf_layout = { 'window': 'call FloatingFZF()' }
endif

[nstetter]

How would I change the background color for the FloatWindow in @alfunx example?

[marcov]

How would I change the background color for the FloatWindow in @alfunx example?

@nstetter use highlight TabLine ctermbg=<code>

[alfunx]

@nstetter If you want to change the color for all floating windows and just use that color, set the NormalFloat group and remove the following line:

call setwinvar(win, '&winhl', 'NormalFloat:TabLine')

If you want to use a different colors for that specific floating window (while leaving the other ones as they are now), exchange Tabline with some other highlighting group, e.g.:

call setwinvar(win, '&winhl', 'NormalFloat:Error')

You can also define a highlighting group yourself and then use that, e.g.

highlight SpecificFloat ctermbg=... ctermfg=...

[nstetter]

Thanks for the explanation.
I found it more applicable to change the background color using the minimal style option and the FZF_DEFAULT_OPTS variable.

One thing I am still having issues with is the layout option. I set --layout=reverse
But it does not get respected, as can be seen in the screenshot:

My whole config is:

    " Using floating windows of Neovim to start fzf
    if has('nvim-0.4.0')
      let $FZF_DEFAULT_OPTS .= '--color=bg:#20242C --border --layout=reverse'
      function! FloatingFZF()
	let width = float2nr(&columns * 0.9)
	let height = float2nr(&lines * 0.6)
	let opts = { 'relative': 'editor',
		   \ 'row': (&lines - height) / 2,
		   \ 'col': (&columns - width) / 2,
		   \ 'width': width,
		   \ 'height': height,
		   \ 'style': 'minimal'
		   \}

	let win = nvim_open_win(nvim_create_buf(v:false, v:true), v:true, opts)
	call setwinvar(win, '&winhighlight', 'NormalFloat:TabLine')
      endfunction

      let g:fzf_layout = { 'window': 'call FloatingFZF()' }
    endif

When echoing $FZF_DEFAULT_OPTS inside vim I get:

--multi
--color=dark
--color=fg:-1,bg:-1,hl:#c678dd,fg+:#ffffff,bg+:#4b5263,hl+:#d858fe
--color=info:#98c379,prompt:#61afef,pointer:#be5046,marker:#e5c07b,spinner:#61afef,header:#61afef
--color=bg:#20242C --border --layout=reverse

Any idea why the reverse layout does not work like that?

[junegunn]

@nstetter 👉 #916

[yutakatay]

https://github.com/yuki-ycino/fzf-preview.vim