[Bug] Korean language support issue

[voisbe]

Bug Description

When I change the keyboard to Korean language and type, I get an error.

Unhandled Exception: FormatException

#0 _extension#8.shift (package:appflowy_editor/src/editor/editor_component/service/ime/delta_input_service.dart:311:7)
#1 _extension#8.<< (package:appflowy_editor/src/editor/editor_component/service/ime/delta_input_service.dart:308:42)
#2 _extension#2.format (package:appflowy_editor/src/editor/editor_component/service/ime/delta_input_service.dart:252:26)
#3 _extension#1.format (package:appflowy_editor/src/editor/editor_component/service/ime/delta_input_service.dart:238:50)
#4 DeltaTextInputService.apply. (package:appflowy_editor/src/editor/editor_component/service/ime/delta_input_service.dart:68:49)
#5 MappedListIterable.elementAt (dart:_internal/iterable.dart:415:31)
#6 ListIterator.moveNext (dart:_internal/iterable.dart:344:26)
#7 new _GrowableList._ofEfficientLengthIterable (dart:core-patch/growable_array.dart:189:27)
#8 new _GrowableList.of (dart:core-patch/growable_array.dart:150:28)
#9 new List.of (dart:core-patch/array_patch.dart:47:28)
#10 ListIterable.toList (dart:_internal/iterable.dart:214:7)
#11 DeltaTextInputService.apply (package:appflowy_editor/src/editor/editor_component/service/ime/delta_input_service.dart:68:59)
#12 DeltaTextInputService.updateEditingValueWithDeltas (package:appflowy_editor/src/editor/editor_component/service/ime/delta_input_service.dart:121:5)
#13 TextInput._handleTextInputInvocation (package:flutter/src/services/text_input.dart:1857:63)
#14 TextInput._loudlyHandleTextInputInvocation (package:flutter/src/services/text_input.dart:1746:20)
#15 MethodChannel._handleAsMethodCall (package:flutter/src/services/platform_channel.dart:547:55)
#16 MethodChannel.setMethodCallHandler. (package:flutter/src/services/platform_channel.dart:540:34)
#17 _DefaultBinaryMessenger.setMessageHandler. (package:flutter/src/services/binding.dart:567:35)
#18 _invoke2 (dart:ui/hooks.dart:202:13)
#19 _ChannelCallbackRecord.invoke (dart:ui/channel_buffers.dart:40:5)
#20 _Channel.push (dart:ui/channel_buffers.dart:130:31)
#21 ChannelBuffers.push (dart:ui/channel_buffers.dart:326:17)
#22 PlatformDispatcher._dispatchPlatformMessage (dart:ui/platform_dispatcher.dart:723:22)
#23 _dispatchPlatformMessage (dart:ui/hooks.dart:114:31)

How to Reproduce

Change your keyboard to Korean language and type.
"안녕하세요."

Expected Behavior

Korean input should come out properly.
ex) 안녕하세요.

Operating System

MacOS, iOS

AppFlowy Editor Version(s)

1.0.4

Screenshots

1. Typing Korean language in the appflowy official desktop app works fine.

2. The mentioned error occurs in the app I am implementing or in the provided sample app. An error occurs and the characters come out garbled.

Additional Context

No response

[LucasXu0]

@voisbe Does it work as expected on the macOS?

[voisbe]

@LucasXu0 Yes, both the official and sample apps for MacOS desktop work well.

[LucasXu0]

@voisbe Is it what you want? I'm not sure because I don't understand the Korean input method.

vv.mp4

Or could you help to check this PR? #253

[voisbe]

@LucasXu0 The issue is not resolved. Entering text with autocomplete works well, but the problem arises when typing manually character by character. I'm not very familiar with it, but I'll take a closer look at the code.

[voisbe]

@LucasXu0 No FormatException errors occur. However, there remains a problem with the characteristics of Hangul. Up to 3 characters are combined in Hangeul. Up to 2 characters are combined, but 3 characters are not created.
ex) 안녕 (o) 아ㄴ녀ㅇ (x)

RPReplay_Final1687752839.MP4

• TextField

[LucasXu0]

@voisbe Got it.

[LucasXu0]

@voisbe #255

Can you help to check the latest code? I tested with Korean IME, it works fine now.

[voisbe]

@LucasXu0 It works. Great job! It's much appreciated!