gaul / libinput-force-middle-click-emulation

force libinput to emulate a middle click when pressing left and right buttons simultaneously

libinput-force-middle-click-emulation

Force libinput to emulate a middle click when pressing left and right buttons simultaneously. This allows GNOME Wayland (and other Wayland compositors that do not expose libinput configuration) to configure the existing libinput functionality.

Information for users of mutter version 3.36.1 or newer

This is not needed anymore if you use mutter version 3.36.1 or newer. There it is possible to directly enable middle click emulation:

gsettings set org.gnome.desktop.peripherals.mouse middle-click-emulation true

Installation

Build hook.so then configure libinput to LD_PRELOAD it:

make
echo 'export LD_PRELOAD="$LD_PRELOAD /path/to/hook.so"' | sudo tee -a /etc/profile.d/libinput.sh

Log out and log in to enable.

References

• GNOME mutter issue
• libinput documentation
• Inspired by scroll-emulation

License

• MIT

libinput-force-middle-click-emulation's Issues

Make project more generic?

I recently saw @PatPennell's libinput-disable-on-click-scrolling project/fork and wonder if this project should grow in scope to allow further configuration. Some symbols like libinput_device_config_middle_emulation_set_enabled and libinput_device_config_scroll_set_button can be looked up at run-time via dlsym but others like LIBINPUT_CONFIG_MIDDLE_EMULATION_ENABLED are enums.

Stopped working in Gnome 3.36.1

Since I've found the workaround (issue #1) it really worked great for a long time.
But now it stopped working in gnome-shell 3.36.1 (it still worked with gnome-shell 3.36.0) even when the workaround is applied.
@gaul Do you know if something recently changed in Gnome, that prevents libinput-middle-click-emulation from working correctly?

Middle click emulation stopped working

Hi,

Since today, this does not work anymore for me...
I'm using it on Arch Linux for several months now without any problem, but suddenly it stopped working.

Running the compiled hook.so directly gives:

fish: “./hook.so” terminated by signal SIGSEGV (Address boundary error)

I don't know if it used to give another output.

I will try to downgrade some packages to see if I can narrow down the cause of the problem.