fixup sway and add mimeapps

nixos/modules/display.nix

@@ -8,8 +8,28 @@ with lib; let
   user = config.user;
 
   cfg = config.displays;
+
   renderDisplaysForHyprland = displays: (map displayHyprlandSetting (builtins.filter (d: d.enable) displays));
 
+  swaybgJob = displays: {
+    Unit = {
+      Description = "SwayBG";
+    };
+    Service = {
+      ExecStart =
+        "${pkgs.swaybg}/bin/swaybg "
+        + builtins.concatStringsSep " " (map swaybgCmd displays);
+    };
+    Install = {
+      WantedBy = ["graphical-session.target"];
+    };
+  };
+
+  swaybgCmd = display:
+    if (display.enable && display ? wallpaper && display.wallpaper != null)
+    then "-o ${display.name} -i ${display.wallpaper} -m fill"
+    else "";
+
   displayHyprlandSetting = display:
     specificDisplay display
     + ", "
@@ -22,25 +42,6 @@ with lib; let
     + "transform,"
     + toString display.rotation;
 
-  swaybgJob = displays: {
-    Unit = {
-      Description = "SwayBG";
-    };
-    Service = {
-      ExecStart =
-        "${pkgs.swaybg}/bin/swaybg "
-        + concatStringsSep " " (map swaybgCmd displays);
-    };
-    Install = {
-      WantedBy = ["graphical-session.target"];
-    };
-  };
-
-  swaybgCmd = display:
-    if (display.wallpaper != "")
-    then "-o ${display.name} -i ${display.wallpaper} -m fill"
-    else "";
-
   specificDisplay = display:
     if display.description == ""
     then display.name
@@ -55,7 +56,7 @@ with lib; let
     else toString x + "x" + toString y;
 
   renderDisplaysForSway = displays:
-    listToAttrs (map displaySwaySetting displays);
+    listToAttrs (map displaySwaySetting (builtins.filter (d: d.enable) displays));
 
   displaySwaySetting = display: {
     name = display.name;
@@ -65,9 +66,12 @@ with lib; let
       mode =
         mkIf (!resUnset res)
         "${toString res.x}x${toString res.y}@${toString res.freq}Hz";
-      bg = display.wallpaper + " fill";
       scale = toString display.scaling;
-    };
+    }
+    // lib.mkIf ( display ? wallpaper && display.wallpaper != null ) {
+      bg = "${ display.wallpaper } fill";
+    }
+    ;
   };
 
   resolutionType = types.submodule {
@@ -124,7 +128,7 @@ with lib; let
       };
       wallpaper = mkOption {
         description = "path to wallpaper";
-        default = "";
+        default = null;
       };
       workspaces = mkOption {
         default = {};
@@ -173,10 +177,10 @@ in {
   config = mkIf cfg.enable {
     home-manager.users.${user}.imports = [
       {
-        systemd.user.services.swaybg = swaybgJob (attrValues cfg.displays);
-
         programs.waybar.settings.mainBar."hyprland/workspaces".persistent_workspaces = waybarWorkspaceConf (attrValues cfg.displays);
 
+        systemd.user.services.swaybg = swaybgJob (builtins.attrValues cfg.displays);
+
         wayland.windowManager = mkIf (cfg.displays != {}) {
           hyprland.settings = {
             monitor = renderDisplaysForHyprland (attrValues cfg.displays);