macOS: IME Escape key is not working properly

[vkedwardli]

This is reproducible on macOS 10.15.6 not reproducible on macOS 10.13.6 nor macOS 11.2.1

When using SDL2, I need to double press (or even more times) the Escape key to dismiss the macOS IME Composite text + Candidate Window (SDL_TEXTEDITING/Composite string is not shown in the screencap)

Current behaviour:

Expected behaviour:

SDLTranslatorResponder's NSTextInputContext has handled the escape key and returned "true"

• Even if I send double interpretKeyEvents: or handleEvent: to the NSTextInputContext does not work.
• Overriding NSView's keyDown and send the interpretKeyEvents: does not work.

I can reproduce this issue with Lite XL (cc @Guldoman) :

Only SDL2 application is affected, there are no problem with system apps like TextEdit.app or a simple imgui app without SDL2

I'm a bit lost, hope any IME expert could shed some light, thanks in advance!

Incorrect attempt to fix this issue: https://github.com/libsdl-org/SDL/pull/6486

[Guldoman]

Does it still happen if you disable "Live Conversion" in the IME settings?

For ease of testing, to make Lite XL show the actual characters:

1. Download NotoSansJP-Regular and put it in .config/lite-xl/fonts
2. Add this to your user module (click on the cog icon):

   local code_font = renderer.font.load(DATADIR .. "/fonts/JetBrainsMono-Regular.ttf", 15 * SCALE)
   local jp_font = renderer.font.load(USERDIR .. "/fonts/NotoSansJP-Regular.otf", 15 * SCALE)
   style.code_font = renderer.font.group({code_font, jp_font})

[vkedwardli]

Thanks for the info, I can show the composite character correctly now

Does it still happen if you disable "Live Conversion" in the IME settings?

Yes, disabling "Live Conversion" only disable the second level to escape, but the problem "multiple escape key press to escape each level" still exists