feat(gnome): Add "Add to Steam" option to right click menu of executable files

spec_files/steamdeck-gnome-presets/steamdeck-gnome-presets.spec

@@ -13,6 +13,7 @@ Requires:       steamdeck-backgrounds
 Requires:       dbus-x11
 Requires:       zenity
 Requires:       inxi
+Requires:       nautilus-python
 
 Conflicts:      steamdeck-kde-presets
 Conflicts:      steamdeck-kde-presets-desktop
@@ -37,6 +38,7 @@ cp -rv usr/bin/* %{buildroot}%{_bindir}
 %files
 %{_bindir}/steamos-add-to-steam
 %{_bindir}/steamos-nested-desktop
+%{_datadir}/nautilus-python/extensions/steamos-add-to-steam.py
 %{_datadir}/applications/steam/steamos-nested-desktop/*
 
 # Finally, changes from the latest release of your application are generated from

spec_files/steamdeck-gnome-presets/usr/share/nautilus-python/extensions/steamos-add-to-steam.py

@@ -0,0 +1,41 @@
+import os
+from urllib.parse import unquote
+from gi.repository import Nautilus, GObject
+from typing import List
+
+class AddToSteamExtension(GObject.GObject, Nautilus.MenuProvider):
+    def _add_to_steam(self, file: Nautilus.FileInfo) -> None:
+        filename = unquote(file.get_uri()[7:])
+
+        os.system("/usr/bin/steamos-add-to-steam " + filename)
+
+    def menu_activate_cb(
+        self,
+        menu: Nautilus.MenuItem,
+        file: Nautilus.FileInfo,
+    ) -> None:
+        self._add_to_steam(file)
+
+    def get_file_items(
+        self,
+        files: List[Nautilus.FileInfo],
+    ) -> List[Nautilus.MenuItem]:
+        if len(files) != 1:
+            return []
+
+        file = files[0]
+        if file.get_uri_scheme() != "file":
+            return []
+
+        if not os.access(unquote(file.get_uri()[7:]), os.X_OK):
+            return []
+
+        item = Nautilus.MenuItem(
+            name="SteamOS::steamos_add_to_steam",
+            label="Add to Steam",
+        )
+        item.connect("activate", self.menu_activate_cb, file)
+
+        return [
+            item,
+        ]