get_window_class_in_wayland.py

import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gio
from gi.repository import GLib

conn = Gio.DBusProxy.new_for_bus_sync(
    Gio.BusType.SESSION,
    Gio.DBusProxyFlags.NONE,
    # info
    None,
    #name
    "org.gnome.Shell",
    # object path
    "/org/gnome/Shell",
    # interface_name
    "org.gnome.Shell",
    # cancellable
    None,
)
print(conn)
expr = "global.get_window_actors().findIndex(a=>a.meta_window.has_focus()===true)"
ret = conn.call_sync(
    "Eval",
    GLib.Variant.new_tuple(GLib.Variant.new_string(expr)),
    Gio.DBusCallFlags.NONE,
    -1,
    None,
)
print(ret)
index = ret[1]
expr = "global.get_window_actors()[%s].get_meta_window().get_wm_class()" % index
ret = conn.call_sync(
    "Eval",
    GLib.Variant.new_tuple(GLib.Variant.new_string(expr)),
    Gio.DBusCallFlags.NONE,
    -1,
    None,
)

print(ret)