From f1e57311ca619f8b402dcd1db58d041738412af6 Mon Sep 17 00:00:00 2001
From: wsdjeg <wsdjeg@outlook.com>
Date: Wed, 13 Apr 2022 10:08:57 +0800
Subject: [PATCH] feat(defx): use `p` to toggle preview windows

close https://github.com/SpaceVim/SpaceVim/issues/4205
---
 config/plugins/defx.vim | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/config/plugins/defx.vim b/config/plugins/defx.vim
index 6fc779817..41a2f09c8 100644
--- a/config/plugins/defx.vim
+++ b/config/plugins/defx.vim
@@ -146,8 +146,7 @@ function! s:defx_init()
         \ defx#do_action('drop', 'split')
   nnoremap <silent><buffer><expr> st
         \ defx#do_action('drop', 'tabedit')
-  nnoremap <silent><buffer><expr> p
-        \ defx#do_action('open', 'pedit')
+  nnoremap <silent><buffer><expr> p defx#do_action('call', g:defx_config_sid . 'DefxPreview')
   nnoremap <silent><buffer><expr> K
         \ defx#do_action('new_directory')
   nnoremap <silent><buffer><expr> N
@@ -207,6 +206,27 @@ function! s:DefxSmartL(_)
   endif
 endfunction
 
+function! s:DefxPreview(_) abort
+  if s:preview_windows_opened()
+    pclose
+  else
+    if !defx#is_directory()
+      let filepath = defx#get_candidate()['action__path']
+      exe 'topleft pedit ' . filepath
+    endif
+  endif
+endfunction
+
+fun! s:preview_windows_opened()
+  for nr in range(1, winnr('$'))
+    if getwinvar(nr, "&pvw") == 1
+      " found a preview
+      return 1
+    endif  
+  endfor
+  return 0
+endfun
+
 function! s:DefxSmartH(_)
   " if cursor line is first line, or in empty dir
   if line('.') ==# 1 || line('$') ==# 1