Space2Super

This little hack for X turns the spacebar key into another Super key when used in combination. When used alone, it behaves like the ordinary space bar on the key release event. Especially useful with e.g. tiling window managers.

So it is like Space2Ctrl from which it was forked but for the Space-to-Super case. Please also take note of xcape which, when paired with xmodmap, can emulate both Space2Ctrl and Space2Super. For even more complex scenarios (including Wayland support), refer to this excellent article for a comparative list of keyboard remappers.

Prerequisites:

• Install the XTEST development package. On Debian GNU/Linux derivatives:

sudo apt-get install libxtst-dev

or, equivalently:

make deps

• If the program complains about a missing "XRecord" module, enable it by adding 'Load "Record"' to the Module section of /etc/X11/xorg.conf (this step is unnecessary on most systems), e.g.:

    Section "Module"
            Load  "Record"
    EndSection

Installation:

make deps && make && cp space2super s2sctl $PREFIX/bin

Usage:

• Load Space2Super with s2sctl start.
• Unload Space2Super with s2sctl stop.
• IMPORTANT: Whenever your key code mappings are changed (e.g. by setxkbmap), re-apply the Space2Super-specific changes with s2sctl remap (otherwise your Space key will produce no effect, even while just typing).
• You can check whether Space2Super is running by executing s2sctl running, which exits with a zero (success) code if Space2Super is active (e.g. use if s2sctl running in scripts).
• s2sctl also accepts --quiet as a second argument which suppresses non-critical messages.
• In $XDG_CONFIG_HOME/space2super/config, you can configure Space2Super typing timeout, i.e. the amount of time that should pass between a single Space press and the consequent release for it to count as typing a space character, by adding a line timeout_millisec NUMBER ($XDG_CONFIG_HOME is ~/.config by default if unset).