SpaceFN for Linux with tapping for dedicated arrow keys especially for 60% keyboard.
SpaceFN-Tap is adapted from abrasive/spacefn-evdev with tapping for dedicated arrow keys inspired from Anne Pro 2.
If you have an Anne Pro 2, check this thread.
I did not spend much time on this code so it does not look clean.
The story started from here: https://geekhack.org/index.php?topic=51069.0
Keys at the second layer are not the same in my code. It is personal so choose your own preference.
I use KEY_RIGHTSHIFT, KEY_COMPOSE, KEY_RIGHTALT and KEY_RIGHTCTRL for KEY_UP, KEY_DOWN, KEY_LEFT and KEY_RIGHT. All these four keys should work with their normal functionalities when being pressed and held.
spacefn-tap mimics Anne Pro 2 tap mode but not exactly the same when 4 decidated arrow keys are pressed and held. So it is better to use the KEY_LEFTCTRL and KEY_LEFTALT when KEY_RIGHTCTRL and KEY_RIGHTALT are used for the tap mode. For example to perform ALT + F4 you should do KEY_LEFTALT + KEY_SPACE + KEY_4. KEY_LEFTALT + KEY_4 does not work at this moment.
Depending on your keyboard layout, you might need to swap these keys either by software or hardware (rewiring, check this thread).
Check function key_remap(). I change \| to KEY_DELETE. Note that I also change ~to KEY_ESC to test on my TKL. Comment out this key if you have a real 60% keyboard.
Requirement: libudev
make
sudo ./spacefn-tab /dev/input/by-id/usb-XXX-event-kbd
Find your keyboard ID in /dev/input/by-id (for USB) and /dev/input/by-path (for PS/2).
sudo ./spacefn-tab /dev/input/by-id/usb then press Tab twice to list all input devices
sudo ./spacefn-tab /dev/input/by-path/ then press Tab twice to list all input devices
After runing, there is a bug that "new lines" are running continously in the console due to the library. You just need to press any key and it should be fine to use.
You can customize by using key_map() as the original spacefn-evdev version.
You can also add new layers.
Check this page to find keycode for Linux system: input-event-codes.h.
Most of the keycodes are compatible with my keyboards. If not, detect key pressed by sudo showkey