sway: port xwayland use to sane.programs API

hosts/common/programs/element-desktop.nix

@@ -7,6 +7,15 @@
 { pkgs, ... }:
 {
   sane.programs.element-desktop = {
+    packageUnwrapped = pkgs.element-desktop.override {
+      # use pre-build electron because otherwise it takes 4 hrs to build from source.
+      electron = pkgs.electron-bin;
+    };
+    suggestedPrograms = [
+      "gnome-keyring"
+      "xwayland"
+    ];
+
     sandbox.method = "bwrap";
     sandbox.wrapperType = "wrappedDerivation";
     sandbox.net = "clearnet";
@@ -23,14 +32,7 @@
       "tmp"
     ];
 
-    packageUnwrapped = pkgs.element-desktop.override {
-      # use pre-build electron because otherwise it takes 4 hrs to build from source.
-      electron = pkgs.electron-bin;
-    };
-
     # creds/session keys, etc
     persist.byStore.private = [ ".config/Element" ];
-
-    suggestedPrograms = [ "gnome-keyring" ];
   };
 }

hosts/common/programs/sway/default.nix

@@ -29,9 +29,16 @@ let
     };
   swayPackage = wrapSway (pkgs.sway-unwrapped.overrideAttrs (_: {
     # isNixOS = true;  #< doesn't matter
+    #
+    # about xwayland:
+    # - required by many electron apps, though some electron apps support NIXOS_OZONE_WL=1 for native wayland.
+    # - when xwayland is enabled, KOreader incorrectly chooses the X11 backend
+    #   -> slower; blurrier
+    # - xwayland uses a small amount of memory (like 30MiB, IIRC?)
+    #
     # TODO: something else is dragging a xwayland-enabled wlroots into the environment,
     #       making this actually kinda wasteful.
-    enableXWayland = cfg.config.xwayland;
+    enableXWayland = config.sane.programs.xwayland.enabled;
   }));
 in
 {
@@ -81,14 +88,6 @@ in
               - etc
             '';
           };
-          xwayland = mkOption {
-            type = types.bool;
-            default = true;
-            description = ''
-              whether or not to enable xwayland (allows running X11 apps on sway).
-              some electron apps (e.g. element-desktop) require xwayland.
-            '';
-          };
 
           screenshot_cmd = mkOption {
             type = types.str;
@@ -199,11 +198,6 @@ in
     # icon-theme = lib.mkDefault "Flat-Remix-Grey-Light";  # requires qtbase
   };
 
-  # TODO: port to sane.programs
-  programs.xwayland = lib.mkIf cfg.enabled {
-    enable = cfg.config.xwayland;
-  };
-
   services.gvfs = lib.mkIf cfg.enabled {
     enable = true;  # allow nautilus to mount remote filesystems (e.g. ftp://...)
     package = lib.mkDefault (pkgs.gvfs.override {

hosts/common/programs/sway/sway-config.nix

@@ -35,5 +35,5 @@ in substituteAll {
     mod
     workspace_layout
   ;
-  xwayland = if swayCfg.xwayland then "enable" else "disable";
+  xwayland = if config.sane.programs.xwayland.enabled then "enable" else "disable";
 }

hosts/modules/gui/sxmo/default.nix

@@ -310,12 +310,6 @@ in
           # these could be added, but i don't see much benefit.
           font = "pango:monospace 10";
           mod = "Mod1";  # prefer Alt
-          # about xwayland:
-          # - required by many electron apps, though some electron apps support NIXOS_OZONE_WL=1 for native wayland.
-          # - when xwayland is enabled, KOreader incorrectly chooses the X11 backend
-          #   -> slower; blurrier
-          # - xwayland uses a small amount of memory (like 30MiB, IIRC?)
-          xwayland = false;
           workspace_layout = "tabbed";
 
           screenshot_cmd = "sxmo_screenshot.sh";