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if !(has('nvim') && exists('*nvim_win_set_config'))
echoerr "floating window not supported"
finish
endif
if exists('g:nvim_popup_loaded')
finish
endif
let g:nvim_popup_loaded = 1
let s:popup = {}
function! s:popup__floating_win_opts(width, height) dict abort
let bottom_line = line('w0') + winheight(0) - 1
if self.opened_at[1] + a:height <= bottom_line
let vert = 'N'
let row = 1
else
let vert = 'S'
let row = 0
endif
if self.opened_at[2] + a:width <= &columns
let hor = 'W'
let col = 0
else
let hor = 'E'
let col = 1
endif
return {
\ 'style': 'minimal',
\ 'relative': 'cursor',
\ 'anchor': vert.hor,
\ 'row': row,
\ 'col': col,
\ 'width': a:width,
\ 'height': a:height,
\ }
endfunction
let s:popup.floating_win_opts = funcref('s:popup__floating_win_opts')
function! s:popup__window_size() dict abort
let max_width = winwidth(0) / 2
let max_height = winheight(0) / 3
let width = 0
let height = 0
for line in self.contents
let lw = strdisplaywidth(line)
if lw > width
if lw > max_width
let height += lw / popup_max_width + 1
let width = popup_max_width
continue
endif
let width = lw
endif
let height += 1
endfor
let width += 1
if height > max_height
let height = max_height
endif
return [width, height]
endfunction
let s:popup.window_size = funcref('s:popup__window_size')
function! s:popup__get_winnr() dict abort
return win_id2win(self.win_id)
endfunction
let s:popup.get_winnr = funcref('s:popup__get_winnr')
function! s:popup__get_opener_winnr() dict abort
let winnr = win_id2win(self.opener_winid)
if winnr != 0
return winnr
endif
let winnr = bufwinnr(self.opener_bufnr)
if winnr > 0
return winnr
endif
return 0
endfunction
let s:popup.get_opener_winnr = funcref('s:popup__get_opener_winnr')
function! s:popup_open() dict abort
let self.opened_at = getpos('.')
let self.opener_bufnr = bufnr('%')
let self.opener_winid = win_getid()
let self.type = 'floating'
let [w, h] = self.window_size()
if self.type ==# 'floating'
let opts = self.floating_win_opts(w, h)
let win_id = nvim_open_win(self.opener_bufnr, v:true, opts)
endif
enew!
let popup_bufnr = bufnr('%')
setlocal
\ buftype=nofile bufhidden=hide nomodified nobuflisted noswapfile nonumber
\ nocursorline wrap nonumber norelativenumber signcolumn=no nofoldenable
\ nospell nolist nomodeline
if has_key(self.opts, 'filetype')
let &l:filetype = self.opts.filetype
endif
call setline(1, self.contents)
setlocal nomodified nomodifiable
if has('nvim')
setlocal winhl=Normal:NormalFloat,NormalNC:NormalFloat
endif
nnoremap <buffer><silent><nowait><Esc> :<C-u>call b:__popup.close()<CR>
nnoremap <buffer><silent><nowait>q :<C-u>call b:__popup.close()<CR>
let b:__popup = self
execute 'autocmd BufWipeout,BufLeave <buffer> call getbufvar(' . popup_bufnr . ', "__popup").close()'
if has_key(self.opts, 'enter') && !self.opts.enter
wincmd p
endif
let self.bufnr = popup_bufnr
let self.win_id = win_id
endfunction
let s:popup.open = funcref('s:popup_open')
function! s:popup__close() dict abort
if !has_key(self, 'bufnr')
return
endif
let winnr = self.get_winnr()
if winnr > 0
noautocmd execute winnr . 'wincmd c'
endif
unlet self.bufnr
unlet self.win_id
endfunction
let s:popup.close = funcref('s:popup__close')
function! s:popup__scroll(map) dict abort
let winnr = self.get_winnr()
if winnr == 0
return
endif
execute winnr . 'wincmd w'
sandbox let input = eval('"\<'.a:map.'>"')
execute 'normal!' input
wincmd p
endfunction
let s:popup.scroll = funcref('s:popup__scroll')
function! s:popup__update() dict abort
" Note: `:noautocmd` to prevent BufLeave autocmd event (#13)
" It should be ok because the cursor position is finally back to the first
" position.
let prev_winnr = winnr()
let popup_winnr = self.get_winnr()
if popup_winnr == 0
return
endif
let opener_winnr = self.get_opener_winnr()
if opener_winnr == 0
return
endif
if opener_winnr != prev_winnr
noautocmd execute opener_winnr . 'wincmd w'
endif
try
let [width, height] = self.window_size()
" Window must be configured in opener buffer since the window position
" is relative to cursor
if self.type ==# 'floating'
let id = win_getid(popup_winnr)
if id == 0
return
endif
let opts = self.floating_win_opts(width, height)
call nvim_win_set_config(id, opts)
endif
noautocmd execute popup_winnr . 'wincmd w'
if self.type ==# 'preview'
execute height . 'wincmd _'
endif
setlocal modifiable
silent %delete _
call setline(1, self.contents)
setlocal nomodified nomodifiable
finally
if winnr() != prev_winnr
noautocmd execute prev_winnr . 'wincmd w'
endif
endtry
endfunction
let s:popup.update = funcref('s:popup__update')
function! popup#new(opts) abort
let p = deepcopy(s:popup)
let opts = { 'floating': v:true }
let p.opts = extend(opts, a:opts)
return p
endfunction
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