Bilateral Combinations

[manna-harbour]

Bilateral Combinations

The last mod-tap hold will be converted to the corresponding mod-tap tap if another key on the same hand is tapped during the hold, unless a key on the other hand is tapped first.

This option can be used to prevent accidental modifier combinations with mod-tap, in particular those caused by rollover on home row mods.

• documentation
• branch

This is a proof of concept implementation. Please note the known issues.

A more correct implementation based on per-keypair tapping term is planned for the future. If successful, the current implementation will be dropped. If not, issues with the current implementation will be addressed and a PR submitted upstream.

[cfarvidson]

This would be great!

Any chance to get a PER_KEY for this feature?

[bgl314]

I like mods on my left thumbs, and was frustrated waiting for the timeout before them being active with mod-taps on the same side. I added the below to the start of the bilateral_combinations_hold function to avoid my thumb row. I also define in my config.h:
#define BILATERAL_COMBINATIONS 500 #define BILATERAL_COMBINATIONS_EXCEPTION_ROW 3
in action.c:
static void bilateral_combinations_hold(action_t action, keyevent_t event) { # ifdef BILATERAL_COMBINATIONS_EXCEPTION_ROW
if(event.key.row == BILATERAL_COMBINATIONS_EXCEPTION_ROW || event.key.row == BILATERAL_COMBINATIONS_EXCEPTION_ROW + MATRIX_ROWS / 2)
return;
# endif ...