[vim] Use Vim 8 terminal when appropriate

Close #1055

README-VIM.md

@@ -37,7 +37,7 @@ Note that the environment variables `FZF_DEFAULT_COMMAND` and
 - `g:fzf_action`
     - Customizable extra key bindings for opening selected files in different ways
 - `g:fzf_layout`
-    - Determines the size and position of fzf window (tmux pane or Neovim split)
+    - Determines the size and position of fzf window
 - `g:fzf_colors`
     - Customizes fzf colors to match the current color scheme
 - `g:fzf_history_dir`
@@ -72,7 +72,7 @@ let g:fzf_action = {
 " - down / up / left / right
 let g:fzf_layout = { 'down': '~40%' }
 
-" In Neovim, you can set up fzf window using a Vim command
+" You can set up fzf window using a Vim command (Neovim or latest Vim 8 required)
 let g:fzf_layout = { 'window': 'enew' }
 let g:fzf_layout = { 'window': '-tabnew' }
 let g:fzf_layout = { 'window': '10split enew' }
@@ -116,7 +116,7 @@ following options.
 | `options`                  | string/list   | Options to fzf                                                   |
 | `dir`                      | string        | Working directory                                                |
 | `up`/`down`/`left`/`right` | number/string | Use tmux pane with the given size (e.g. `20`, `50%`)             |
-| `window` (*Neovim only*)   | string        | Command to open fzf window (e.g. `vertical aboveleft 30new`)     |
+| `window` (Vim 8 / Neovim)  | string        | Command to open fzf window (e.g. `vertical aboveleft 30new`)     |
 | `launcher`                 | string        | External terminal emulator to start fzf with (GVim only)         |
 | `launcher`                 | funcref       | Function for generating `launcher` string (GVim only)            |
 

doc/fzf.txt

@@ -1,4 +1,4 @@
-fzf.txt	fzf	Last change: August 14 2017
+fzf.txt	fzf	Last change: September 29 2017
 FZF - TABLE OF CONTENTS                                            *fzf* *fzf-toc*
 ==============================================================================
 
@@ -61,7 +61,7 @@ Note that the environment variables `FZF_DEFAULT_COMMAND` and
    - Customizable extra key bindings for opening selected files in different
      ways
  - `g:fzf_layout`
-   - Determines the size and position of fzf window (tmux pane or Neovim split)
+   - Determines the size and position of fzf window
  - `g:fzf_colors`
    - Customizes fzf colors to match the current color scheme
  - `g:fzf_history_dir`
@@ -97,7 +97,7 @@ Examples~
     " - down / up / left / right
     let g:fzf_layout = { 'down': '~40%' }
 
-    " In Neovim, you can set up fzf window using a Vim command
+    " You can set up fzf window using a Vim command (Neovim or latest Vim 8 required)
     let g:fzf_layout = { 'window': 'enew' }
     let g:fzf_layout = { 'window': '-tabnew' }
     let g:fzf_layout = { 'window': '10split enew' }
@@ -111,6 +111,7 @@ Examples~
       \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
       \ 'hl+':     ['fg', 'Statement'],
       \ 'info':    ['fg', 'PreProc'],
+      \ 'border':  ['fg', 'Ignore'],
       \ 'prompt':  ['fg', 'Conditional'],
       \ 'pointer': ['fg', 'Exception'],
       \ 'marker':  ['fg', 'Keyword'],
@@ -141,7 +142,7 @@ following options.
   `options`                   | string/list   | Options to fzf
   `dir`                       | string        | Working directory
   `up` / `down` / `left` / `right`  | number/string | Use tmux pane with the given size (e.g.  `20` ,  `50%` )
-  `window`  (Neovim only)     | string        | Command to open fzf window (e.g.  `vertical aboveleft 30new` )
+  `window`  (Vim 8 / Neovim)  | string        | Command to open fzf window (e.g.  `vertical aboveleft 30new` )
   `launcher`                  | string        | External terminal emulator to start fzf with (GVim only)
   `launcher`                  | funcref       | Function for generating  `launcher`  string (GVim only)
  ---------------------------+---------------+--------------------------------------------------------------
@@ -169,8 +170,13 @@ function that decorates the options dictionary so that it understands
 GVIM                                                                  *fzf-gvim*
 ==============================================================================
 
-In GVim, you need an external terminal emulator to start fzf with. `xterm`
+With the latest version of GVim, fzf will start inside the builtin terminal
-command is used by default, but you can customize it with `g:fzf_launcher`.
+emulator of Vim. Please note that this terminal feature of Vim is still young
+and unstable and you may run into some issues.
+
+If you have an older version of GVim, you need an external terminal emulator
+to start fzf with. `xterm` command is used by default, but you can customize
+it with `g:fzf_launcher`.
 >
     " This is the default. %s is replaced with fzf command
     let g:fzf_launcher = 'xterm -e bash -ic %s'

plugin/fzf.vim

@@ -386,10 +386,11 @@ try
   endif
 
   let prefer_tmux = get(g:, 'fzf_prefer_tmux', 0)
-  let use_height = has_key(dict, 'down') &&
+  let use_height = has_key(dict, 'down') && !has('gui_running') &&
-        \ !(has('nvim') || s:is_win || has('win32unix') || s:present(dict, 'up', 'left', 'right')) &&
+        \ !(has('nvim') || s:is_win || has('win32unix') || s:present(dict, 'up', 'left', 'right', 'window')) &&
         \ executable('tput') && filereadable('/dev/tty')
-  let use_term = has('nvim-0.2.1') || (has('nvim') && !s:is_win) || (has('terminal') && has('patch-8.0.995') && (has('gui_running') || s:is_win))
+  let has_term = has('nvim-0.2.1') || has('nvim') && !s:is_win || has('terminal') && has('patch-8.0.995')
+  let use_term = has_term && (has('gui_running') || s:is_win || !use_height && s:present(dict, 'down', 'up', 'left', 'right', 'window'))
   let use_tmux = (!use_height && !use_term || prefer_tmux) && !has('win32unix') && s:tmux_enabled() && s:splittable(dict)
   if prefer_tmux && use_tmux
     let use_height = 0
@@ -400,9 +401,6 @@ try
     let optstr .= ' --height='.height
   elseif use_term
     let optstr .= ' --no-height'
-    if !has('nvim') && !s:is_win
-      let optstr .= ' --bind ctrl-j:accept'
-    endif
   endif
   let command = prefix.(use_tmux ? s:fzf_tmux(dict) : fzf_exec).' '.optstr.' > '.temps.result
 
@@ -699,7 +697,11 @@ function! s:execute_term(dict, command, temps) abort
     if has('nvim')
       call termopen(command, fzf)
     else
-      call term_start([&shell, &shellcmdflag, command], {'curwin': fzf.buf, 'exit_cb': function(fzf.on_exit)})
+      let t = term_start([&shell, &shellcmdflag, command], {'curwin': fzf.buf, 'exit_cb': function(fzf.on_exit)})
+      " FIXME: https://github.com/vim/vim/issues/1998
+      if !has('nvim') && !s:is_win
+        call term_wait(t, 20)
+      endif
     endif
   finally
     if s:present(a:dict, 'dir')