Flickering when moving directories using narrow

[pddg]

Problems summary

Flickering may occur when moving directories using narrow. However, it may not occur depending on the terminal emulator used.

There is no functional problem, but it would be nice to know how to prevent it from happening.

Expected

No flicker occurs on either terminal emulator.

Environment Information

• ddu-ui-filer version (SHA1): e7e05b9

• denops.vim version (SHA1): 5736b667b40829ab21bedaf7d321de1cc71dbd7f

• deno version(deno -V output): deno 1.29.1

• OS: macOS 13.1 Apple M1 Pro

• neovim/Vim :version output:

  NVIM v0.8.1
  Build type: Release
  LuaJIT 2.1.0-beta3
  Compiled by brew@HMBRW-A-001-M1-004.local
  
  Features: +acl +iconv +tui
  See ":help feature-compile"
  
     system vimrc file: "$VIM/sysinit.vim"
    fall-back for $VIM: "/opt/homebrew/Cellar/neovim/0.8.1/share/nvim"
  
  Run :checkhealth for more info
  

Provide a minimal init.vim/vimrc without plugin managers (Required!)

if exists('+compatible') && &compatible
  set nocompatible
endif

set runtimepath^=~/.cache/dein/repos/github.com/vim-denops/denops.vim"
set runtimepath^=~/.cache/dein/repos/github.com/Shougo/ddu.vim"
set runtimepath^=~/.cache/dein/repos/github.com/Shougo/ddu-ui-filer"
set runtimepath^=~/.cache/dein/repos/github.com/Shougo/ddu-source-file"
set runtimepath^=~/.cache/dein/repos/github.com/Shougo/ddu-kind-file"
set runtimepath^=~/.cache/dein/repos/github.com/Shougo/ddu-column-filename"
set runtimepath^=~/.cache/dein/repos/github.com/Shougo/ddu-filter-matcher_substring"

filetype plugin indent on
syntax on

call ddu#custom#patch_global({
    \   'ui': 'filer',
    \   'uiParams': {
    \     'filer': {
    \       'splitDirection': 'topleft',
    \       'split': 'vertical',
    \       'winWidth': '25',
    \     },
    \   },
    \   'sourceOptions': {
    \     '_': {
    \       'matchers': ['matcher_substring'],
    \       'columns': ['filename'],
    \     },
    \   },
    \   'sources': [{'name': 'file', 'params': {}}],
    \ })

autocmd FileType ddu-filer call s:ddu_filer_settings()
function! s:ddu_filer_settings() abort
    nnoremap <buffer><silent><expr> <CR>
        \ ddu#ui#filer#is_tree() ?
        \ "<Cmd>call ddu#ui#filer#do_action('itemAction', {'name': 'narrow'})<CR>" :
        \ "<Cmd>call ddu#ui#filer#do_action('itemAction', {'name': 'open'})<CR>"
    nnoremap <buffer><silent> q
        \ <Cmd>call ddu#ui#filer#do_action('quit')<CR>
endfunction

How to reproduce the problem from neovim/Vim startup (Required!)

1. Start neovim with minimum init.vim e.g nvim -u init.vim
2. call ddu#start()
3. Move directories

Screenshot (if possible)

Flickering occurred

iTerm2
Build 3.4.18

ddu_ui_flicker_iterm2.mov

wezterm
20221119-145034-49b9839f

ddu_ui_flicker_wezterm.mov

Flickering NOT occurred

macOS's default Terminal.app

ddu_ui_flicker_teminalapp.mov

Upload the log messages by :redir and :message (if errored)

No errors.

[Shougo]

OK. Reproduced.

Please set ddu-action-option-quit.
You need to read the doucumentation...

EXAMPLES					*ddu-ui-filer-examples*
>
	call ddu#custom#patch_global({
	    \   'ui': 'filer',
	    \   'actionOptions': {
	    \     'narrow': {
	    \       'quit': v:false,
	    \     },
	    \   },
	    \ })

	autocmd FileType ddu-filer call s:ddu_filer_my_settings()
	function! s:ddu_filer_my_settings() abort
	  nnoremap <buffer> <CR>
	  \ <Cmd>call ddu#ui#filer#do_action('itemAction')<CR>
	  nnoremap <buffer> o
	  \ <Cmd>call ddu#ui#filer#do_action('expandItem')<CR>
	endfunction

[pddg]

I had missed that setup. Thank you!