Apply format issue with Japanese keyboard on mobile

[haven2world]

Describe the bug
When a user use Japanese keyboard on mobile the toggle format doesn't work correctly.

To Reproduce
Steps to reproduce the behavior:

1. Go to demo site on mobile (iOS or Android)
2. Click on toggle bold button
3. type some characters but don't click the confirm button
4. click the toggle bold button again
5. type some more characters and click the confirm button

Expected behavior
The text shouldn't be bold

Screenshots
https://github.com/user-attachments/assets/48ad5165-24b0-4c78-8568-5b20b37f5ef7

Device Information
on both iOS and Android

[haven2world]

bump this issue

[JiuqingSong]

I tried but as soon as I press the button, IME is dismissed so English letter will be applied to editor.

Any special way to make the IME not dismissed?

[haven2world]

Were you using Japanese keyboard? Feels like it's a Japanese keyboard specific issue

[JiuqingSong]

Yes:

[haven2world]

Probably you need to run it on mobile

[JiuqingSong]

probably. In that case can you help debug and see why? Or maybe an easier fix is just to dismiss the IME when click out.

[haven2world]

Sure, but I'm not familiar with this part, do you have any clue or where should I start to debug?

[JiuqingSong]

In formatSegmentWithContentModel.ts, if selection is collapsed, we will pass the pending format back:

Then in formatContentModel.ts, we apply this pending format into editor core:

Finally in FormatPlugin, while handling compositionEnd event, we call checkAndApplyPendingFormat to put it into model:

That is the whole flow of how pending format works.