Existing window is cleared when invoke any action with chooseAction UI

[Bakudankun]

Steps to reproduce

1. Install next plugins
   • denops.vim
   • ddu.vim
   • ddu-ui-ff
   • ddu-source-action
   • ddu-source-file
   • ddu-kind-file
2. Start vim
3. :edit any file
4. :call ddu#custom#set_global(#{ui: 'ff'})
5. :call ddu#start(#{sources: [#{name: 'file'}]})
6. Place cursor on a directory and :call ddu#ui#ff#do_action('chooseAction')
7. Place cursor on cd and :call ddu#ui#ff#do_action('itemAction', #{name: 'do'})
8. The first window which had a buffer (at step 3) is cleared and starts editing "No Name" buffer, just like :enew is executed at that window

Whatever action you select at step 7, the same thing will occur.

Expected behaviour

The windows is not cleared; just do what is selected at step 7 (closing the FF UI).

Additional information

This problem was resolved when I tried next patch. I don't know whether it has any side effects, but I didn't find one.

diff --git a/denops/@ddu-uis/ff.ts b/denops/@ddu-uis/ff.ts
index 7f2c47f..4caaaa8 100644
--- a/denops/@ddu-uis/ff.ts
+++ b/denops/@ddu-uis/ff.ts
@@ -309,7 +309,7 @@ export class Ui extends BaseUi<Params> {
     }

     if ((await fn.winnr(args.denops, "$")) == 1) {
-      await args.denops.cmd("enew");
+      await args.denops.cmd(`buffer ${args.context.bufNr}`);
     } else {
       await args.denops.cmd("close!");
       await fn.win_gotoid(args.denops, args.context.winId);

Environment

• Windows 11 and Ubuntu 20.04
• Vim 8.2.4563
• denops.vim: 963a8a9effd785e3ba6c6596aa265a9d85fe92ba
• ddu.vim: 92ddeccbfa90503f9e6316f1fe640adc21490cf3
• ddu-ui-ff: d51ed0729d419807aab2ad1a298c0a062a4f4ec9

[Shougo]

OK. I have fixed.