Add desktop adapters and extras

src/desktop.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+import os
+from typing import Callable, Protocol
+
+
+class DesktopAdapter(Protocol):
+    def start_hotkey_listener(self, hotkey: str, callback: Callable[[], None]) -> None:
+        raise NotImplementedError
+
+    def inject_text(self, text: str, backend: str) -> None:
+        raise NotImplementedError
+
+    def run_tray(self, state_getter: Callable[[], str], on_quit: Callable[[], None]) -> None:
+        raise NotImplementedError
+
+
+def get_desktop_adapter() -> DesktopAdapter:
+    session_type = os.getenv("XDG_SESSION_TYPE", "").lower()
+    if session_type == "wayland" or os.getenv("WAYLAND_DISPLAY"):
+        from desktop_wayland import WaylandAdapter
+
+        raise SystemExit(
+            "Wayland is not supported yet. Run under X11 (XDG_SESSION_TYPE=x11) to use lel."
+        )
+    from desktop_x11 import X11Adapter
+
+    return X11Adapter()