Add fake_fullscreen plugin

README.md

@@ -51,6 +51,7 @@ Qminimize               | A rofi script to handle minimize/unminimize of multipl
 floating_window_snapping| Floating window borders snap to other window/screen borders when moved with mouse (X11 only)
 [Mutable Scratch](https://github.com/jrwrigh/qtile-mutable-scratch) | A i3-like scratch pad, where windows maybe added/removed on the fly
 [qtile-plasma](https://github.com/numirias/qtile-plasma) | An tree-based layout, very similar to i3
+fake_fullscreen         | A command to toggle a window's fullscreen state while keeping it tiled
 
 ## Other links
 

fake_fullscreen.py

@@ -0,0 +1,46 @@
+"""
+This module exports the function `toggle_fullscreen_state` which, as the name suggests,
+toggles the fullscreen state of the current window. To clarify, this does *not* change
+anything about the dimensions and position of the window, and internal (to Qtile)
+fullscreen state represented by `libqtile.backend.base.FloatStates`. Instead, it changes
+the fullscreen state from the point of view of the client. This can be used to make
+programs render their window contents as if they were fullscreened while keeping them
+within a tiled layout. It supports both X11 and Wayland.
+
+*NOTE*: In its current form this is incompatible with `auto_fullscreen`, which must be
+set to `False`. Manual fullscreening using the built-in commands (e.g.
+`lazy.window.toggle_fullscreen()`) work as expected.
+
+Example usage:
+
+    from fake_fullscreen import toggle_fullscreen_state
+
+    Key([mod, "shift"], "f", lazy.function(toggle_fullscreen_state))
+
+"""
+
+from libqtile import qtile
+
+
+def _toggle_fullscreen_state_x11(*_):
+    if qtile.current_window:
+        xwin = qtile.current_window.window
+        state = set(xwin.get_property("_NET_WM_STATE", "ATOM", unpack=int))
+        atom = set([qtile.core.conn.atoms["_NET_WM_STATE_FULLSCREEN"]])
+        with qtile.current_window.disable_mask(EventMask.PropertyChange):
+            xwin.set_property("_NET_WM_STATE", list(state ^ atom))
+
+
+def _toggle_fullscreen_state_wayland(*_):
+    if qtile.current_window:
+        qtile.current_window.surface.set_fullscreen(
+            not qtile.current_window.surface.toplevel._ptr.current.fullscreen
+        )
+
+
+if qtile.core.name == "x11":
+    from xcffib.xproto import EventMask
+
+    toggle_fullscreen_state = _toggle_fullscreen_state_x11
+else:
+    toggle_fullscreen_state = _toggle_fullscreen_state_wayland