Hey,

So if you just disable TSF (Set TextServicesLoader's ServicesInstalled function to return false, so it fallbacks on IMM32) it behaves correctly/as expected. Essentially the composition is build up and gets automatically inserted on certain criteria.

I don't know Korean either but here's an example you can run to test if it's working properly (Which is how it's currently working with just IMM32)

Spamming `a` on your keyboard.

Type a on your keyboard, the composition should be filled with ㅁ while the text input is empty.
Type a on your keyboard again, the composition remains the same character as last time but now the text input should contain ㅁ.
If you keep pressing a on your keyboard you'll get the second scenario repeating.

Changing the composition

Type a on your keyboard, the composition string should be filled with ㅁ while the text input is empty.
Type b on your keyboard, the composition string should change to 뮤 while the text input is empty.
Type c on your keyboard, the composition string should change to 뮻 while the text input is empty.
Type a on your keyboard, the composition string changes to ㅁ while 뮻 is inserted into the text input.

When I attempt the same scenario with TSF enabled, the composition string is always empty and everything is immediately inserted into the text input. I think what's supposed to happen is that OnEndComposition is called whenever the composition ends (like in scenario 4 when the user typed a and the composition finished building) and only then should the text input be inserted.

I have this project replicated in C++ but I'm getting different behavior where the composition string is being filled up properly but my text input remains empty.

Does that help? Let me know how I can help since I'm kind of stuck on where to take it from here.

Spamming a on your keyboard.

Changing the composition

Spamming `a` on your keyboard.

Korean doesn't work with TSF #10

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