iOS TextField, Japanese conversion candidates not showing with physical Romaji keyboard input

[paxbun]

Describe the bug

• Conversion candidate list is not showing with physical Romaji keyboard input
• When the return key is pressed, the conversion result is duplicated.
• When the backspace key is pressed, the last character of the phrase to be converted is duplicated.

The latter two bugs are fixed by JetBrains/compose-multiplatform-core#699.

Affected platforms

• iOS

Versions

• Kotlin version*: 1.8.20
• Compose Multiplatform version*: 1.4.1
• OS version(s)* (required for Desktop and iOS issues): 16.5.1
• OS architecture (x86 or arm64): arm64

To Reproduce

1. Modify the App.kt of the Android & iOS template like the following.

   MaterialTheme {
   Column {
       Text("OS: ${getPlatformName()}")
       var text by remember { mutableStateOf(TextFieldValue()) }
       TextField(text, onValueChange = { text = it })
   }
   }

2. Type "kousyou" with Romaji keyboard input.

   kousyou こうしょう can be converted into many sino-japanese words (e.g., 交渉 or 公証). You can see a list of 51 candidates here. kousyou and koushou are equivalent.

3. Press the <space> or <down arrow> keys.

   This must show the full list of conversion candidates of kousyou こうしょう.

4. Press the <return> key to end the conversion.

   You can see that 交渉 is duplicated. With JetBrains/compose-multiplatform-core#699, 交渉 is not duplicated.

5. Type "kousho" (Not the u at the end!) with Romaji keyboard input.

   kousho corresponds to こうしょ.

6. Press the <backspace> key.

   Since the text field contained こうしょ, the text field must contain こうし now, but you can see the text field contains こうしこうし. With JetBrains/compose-multiplatform-core#699, こうし is not duplicated.

Expected behavior The candidate list must appear near the text field. For example, in the system-default Notes app:

https://github.com/JetBrains/compose-multiplatform/assets/17005454/c2a61524-c9fb-4b47-8878-b494b0eec14d

Screenshots Reproduction:

https://github.com/JetBrains/compose-multiplatform/assets/17005454/2079b5e6-d42d-4e99-b4bc-7a6327357fb5

Reproduction with JetBrains/compose-multiplatform-core#699:

https://github.com/JetBrains/compose-multiplatform/assets/17005454/f997c887-168c-4d29-bfa1-fa36b43f67c7

Additional context For those not used to the Japanese writing system, please refer to the Wikipedia page.

[dima-avdeev-jb]

Thanks for such a greate description!

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.