It's a key binding manager for X11. It lets you assign keys on other application and bind custom action to them. You can execute external commands or send fake keys. I'm using it to "emacs-ify" firefox, but can do more.

Let's take a look at a sample configuration file

match all
on "C-<F5>" do exec 'notify-send "hello world"'

match class 'Firefox'
match class 'Chromium-browser'
on "C-w" do "C-x"
on "M-w" do "C-c"
on "C-y" do "C-v"

I binded globally control+F5 to that command, and on firefox and chromium I've re-binded control-w to cut, alt-w to copy and control-y to paste. The key syntax is heavily inspired by emacs.

You can fetch the sources with

git clone

or via the github mirror

git clone

To build you need a C compiler (anything from GCC 4.2 onward should work – that is, anything from the last 15 years), lex/flex, yacc/bison and make. Check out the README for more information on building.

Planned work

This is a sort of TODO list of things I want to develop.

I'm currently binding the key globally and send fake copy of the event if the window doesn't match. But binding the keys globally can interfere with other programs that, by defaults, ignores fake keys (like XTerm).

I should introduce keymaps. This should let me allow arbitrary keys, like "C-x C-s", and also introduce the idea of "states" for our vi friends.