Simple C99 sample showing how to create a border that will follow the focused window on macOS.
Requires access to the accessibility API. Supports macOS High Sierra and newer.
# add the following to the end of your yabairc to have it launch automatically when yabai starts.
# substitute the path to the limelight binary in the 3rd line below.
# tell limelight to refresh when the focused application changes (see issue #3)
yabai -m signal --add event=application_activated action="pkill -SIGUSR1 limelight &> /dev/null"
# kill any existing limelight process if one exists, before we launch a new one
killall limelight &> /dev/null
limelight &> /dev/null &Requires xcode command line tools
# simply clone repo and run make
make
make install