Grab wmclass name or Window Name/Title under Wayland with Gnome 3.x

WaylandUbuntu19.10-AppTitle

# Single Command, runs 2 calls to gdbus to get the currently active Window from Gnome 3.x
# Escaped so you can copy and paste into terminal directly
gdbus call -e -d org.gnome.Shell -o /org/gnome/Shell -m org.gnome.Shell.Eval global.get_window_actors\(\)[`gdbus call -e -d org.gnome.Shell -o /org/gnome/Shell -m org.gnome.Shell.Eval global.get_window_actors\(\).findIndex\(a\=\>a.meta_window.has_focus\(\)===true\) | cut -d"'" -f 2`].get_meta_window\(\).get_wm_class\(\) | cut -d'"' -f 2

# Unescaped version, will not run
# Broken down into 2 commands.

# Call to Gnome to get the array location of the active Application
gdbus call -e -d org.gnome.Shell -o /org/gnome/Shell -m \
org.gnome.Shell.Eval global.get_window_actors().findIndex(a=>a.meta_window.has_focus()===true) \
| cut -d"'" -f 2

# Replace the array number 2 with the one from the previous command and you will get the App Name of the actively focused Window
gdbus call -e -d org.gnome.Shell -o /org/gnome/Shell -m org.gnome.Shell.Eval \
global.get_window_actors()[2].get_meta_window().get_wm_class() \
| cut -d'"' -f 2

Just wanted to highlight some cool work that rvaiya is doing in keyd here: https://github.com/rvaiya/keyd/blob/master/scripts/keyd-application-mapper

In this latest beta, keyd now offers its hot-swappable keyboard layouts and layers with application focus conveyed by that python script via a socket to the keyd daemon. Works on X, Wayland+Sway, and Wayland+Gnome.

That is very interesting, I've not used sway any.. and sadly my distro of choice, Ubuntu Budgie, does not have access to gnome-extensions even though it works with gnome-shell still.