fix: Make not to skip floatwin if it is focusable

autoload/lightline.vim

@@ -10,8 +10,8 @@ set cpo&vim
 
 let s:_ = 1 " 1: uninitialized, 2: disabled
 
-function! lightline#update() abort
-  if s:skip() | return | endif
+function! lightline#update(...) abort
+  if s:skip(get(a:000, 0, v:false)) | return | endif
   if s:_
     if s:_ == 2 | return | endif
     call lightline#init()
@@ -26,12 +26,16 @@ function! lightline#update() abort
   endif
 endfunction
 
-if exists('*win_gettype')
-  function! s:skip() abort " Vim 8.2.0257 (00f3b4e007), 8.2.0991 (0fe937fd86), 8.2.0996 (40a019f157)
+if exists('*nvim_win_get_config')
+  function! s:skip(on_bufenter) abort
+    return !nvim_win_get_config(0).focusable || (a:on_bufenter && nvim_win_get_config(0).relative !=# '')
+  endfunction
+elseif exists('*win_gettype')
+  function! s:skip(on_bufenter) abort " Vim 8.2.0257 (00f3b4e007), 8.2.0991 (0fe937fd86), 8.2.0996 (40a019f157)
     return win_gettype() ==# 'popup' || win_gettype() ==# 'autocmd'
   endfunction
 else
-  function! s:skip() abort
+  function! s:skip(on_bufenter) abort
     return &buftype ==# 'popup'
   endfunction
 endif
@@ -47,7 +51,8 @@ function! lightline#enable() abort
   call lightline#update()
   augroup lightline
     autocmd!
-    autocmd WinEnter,BufEnter,SessionLoadPost,FileChangedShellPost * call lightline#update()
+    autocmd WinEnter,SessionLoadPost,FileChangedShellPost * call lightline#update()
+    autocmd BufEnter * call lightline#update(v:true)
     if !has('patch-8.1.1715')
       autocmd FileType qf call lightline#update()
     endif

plugin/lightline.vim

@@ -15,7 +15,8 @@ set cpo&vim
 
 augroup lightline
   autocmd!
-  autocmd WinEnter,BufEnter,SessionLoadPost,FileChangedShellPost * call lightline#update()
+  autocmd WinEnter,SessionLoadPost,FileChangedShellPost * call lightline#update()
+  autocmd BufEnter * call lightline#update(v:true)
   if !has('patch-8.1.1715')
     autocmd FileType qf call lightline#update()
   endif