CJKV character support (IMEs)

[mvevitsis]

Is your feature request related to a problem? Please describe.

Can't type east asian languages

Describe the solution you'd like

Keyboard layouts/IMEs for
Chinese (qwerty, 9 key)
Japanese (qwerty, 12 key)
Korean (dubeolsik, chungjin)
Vietnamese (qwerty)

(All layouts with support for inputting chinese characters)

Use case

Type Chinese, Japanese, Korean, or Vietnamese

Describe alternatives you've considered

Additional context

[Uranusek]

You can create layouts yourself. You do it in a text file and add it in the keyboard settings, more precisely in the "Languages & Layouts" option.

You can also copy an existing layout and simply change its characters by doing everything from the keyboard settings.

https://github.com/Helium314/openboard/blob/new/layouts.md

[mvevitsis]

A layout is not good enough. It needs an input method editor to convert the inputted text into the correct ideographs, which is beyond the scope of regular prediction dictionaries.

For example, if I type

zhongguo for Chinese
ちゅうごく for Japanese
중국 for Korean
Trung Quốc for Vietnamese

I should be able to get 中国 or 中國 depending on the locale (han unification has made this slightly annoying)

Vietnamese is more a nice to have, I am actually not sure if there is an android keyboard with chu nom support, but for the other three languages this is a standard feature of any keyboard.

[GrimPixel]

Dictionary files can be found at fcitx5-table-extra or awesome-rime.

The focus on high customisability guarantees that not only Vietnamese, but also other writing systems like Sawndip and Khitan would be made possible through this keyboard program.

I am not familiar with the “Dictionary” feature of this program. Maybe that's where the solution is.

[GrimPixel]

To support CJKV+, here are necessary steps:

1. Replace the last character of an underlined string with a new character and keep the string underlined (Jamo -> Hangul, Dakuten/Handakuten + Kana -> Dakuon/Handakuon Kana) Korean input issues #214
2. Underline a string that includes a space (chữ Quốc ngữ -> chữ Hán Nôm) or use another character to indicate a space instead.
3. Replace an underlined string with a new string from dictionary candidates (Pinyin/etc. -> Hanzi, Hangul/Romaja -> Hanja, Kana/Romaji -> Kanji, chữ Quốc ngữ -> chữ Hán Nôm)

[PlexSheep]

Also see #639 for Japanese

[GrimPixel]

I think https://github.com/stroke-input/stroke-input-android can do the job. It's safe to copy its code, as both share the same license.

[o-data]

Hi all. For Vietnamese there is usually 2 type of input that is popular. One is call VNI (Use Number) and the other call Telex.

Another user implement Telex method with this other open source Keyboard:

1. https://github.com/florisboard/florisboard/issues?q=vietnamese
2. Improve Vietnamese Telex keyboard florisboard/florisboard#2259
3. Support Vietnamese Input Method florisboard/florisboard#183

The difference between the two is:

Telex use alphabet to create the "accent"/symbol/tone

For example adding: "s" will add the symbol '

as > á
os > ó

For VNI method it use Number (from 1 to 9 and 0) instead, all these number is allocate to a symbol, and pressing it will trigger that tone.

a1 > á
o1 > ó

You can read more about it here along with software and method to type it in Windows/Linux/macOS: https://yourvietnamese.com/learn-vietnamese/type-vietnamese/

UniKey (Windows software) is also Open Sources: https://www.unikey.org/en/

You can get the source code on his webpage: https://www.unikey.org/en/source.html

[o-data]

Hi @thanhhocse96

Can you also do a Pull Request for HeliBoard?