flatpak: patch electrons under wayland

nixcfgs/users/js0ny/packages/flatpak.nix

@@ -1,5 +1,30 @@
 # https://github.com/gmodena/nix-flatpak
-{...}: {
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  electronApps = [
+    "com.getpostman.Postman"
+    # "com.ticktick.TickTick"
+  ];
+
+  waylandFlags = "\${NIXOS_OZONE_WL:+\${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations --enable-wayland-ime=true}}";
+
+  appWrappers = lib.listToAttrs (map (appid: {
+      name = "flatpak/exports/bin/${appid}";
+      value = {
+        text = ''
+          #!/bin/sh
+          exec flatpak run ${appid} ${waylandFlags} "$@"
+        '';
+        executable = true;
+        force = true;
+      };
+    })
+    electronApps);
+in {
   services.flatpak.enable = true;
   services.flatpak.remotes = [
     {
@@ -23,7 +48,7 @@
     # "com.vivaldi.Vivaldi"
     "com.getpostman.Postman"
     "us.zoom.Zoom"
-    "com.ticktick.TickTick"
+    # "com.ticktick.TickTick" # cannot run on wayland under flatpak
   ];
   services.flatpak.overrides = {
     global = {
@@ -50,8 +75,18 @@
     "md.obsidian.Obsidian".Context.sockets = ["wayland"];
     "com.ticktick.Ticktick".Context.sockets = ["wayland"];
     "com.getpostman.Postman".Context = {
-      persistent = ["Postman"];
+      persistent = ["Postman"]; # Don't create `~/Postman` folder under home
       sockets = ["wayland"];
     };
   };
+  xdg.dataFile = appWrappers;
+  home.activation.patchFlatpakDesktopFiles = lib.hm.dag.entryAfter ["writeBoundary"] ''
+    ${lib.concatMapStringsSep "\n" (appid: ''
+        DESKTOP_FILE="${config.xdg.dataHome}/flatpak/exports/share/applications/${appid}.desktop"
+        if [ -f "$DESKTOP_FILE" ]; then
+          $DRY_RUN_CMD ${pkgs.gnused}/bin/sed -i "s|^\(Exec=.*${appid}\)|\\1 ${waylandFlags}|g" "$DESKTOP_FILE"
+        fi
+      '')
+      electronApps}
+  '';
 }

nixcfgs/users/js0ny/packages/gui.nix

@@ -3,6 +3,7 @@
   lib,
   ...
 }: let
+  # FIXME: This will block the desktop files
   mkFcitxIM = builtins.map (
     p:
       lib.hiPrio (
@@ -16,6 +17,30 @@
         ''
       )
   );
+  # Wrap Electron apps to use Wayland when NIXOS_OZONE_WL is set
+  # This only works for apps that does not patched by upstream
+  mkElectronWayland = builtins.map (
+    p:
+      lib.hiPrio (
+        pkgs.runCommand "${p.name}-wrapped"
+        {
+          nativeBuildInputs = [pkgs.makeWrapper];
+          meta = p.meta;
+        }
+        ''
+          mkdir -p $out/bin
+          # ln -s ${p}/share $out/share
+          makeWrapper ${lib.getExe p} $out/bin/${p.meta.mainProgram or p.pname} \
+            --inherit-argv0 \
+            --run '
+              if [ -n "$NIXOS_OZONE_WL" ] && [ -n "$WAYLAND_DISPLAY" ]; then
+                NIX_WAYLAND_FLAGS="--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations --enable-wayland-ime=true"
+              fi
+            ' \
+            --add-flags "\$NIX_WAYLAND_FLAGS"
+        ''
+      )
+  );
 in {
   home.packages = with pkgs;
     [
@@ -81,12 +106,15 @@ in {
       cider-2
       kicad
       blender
-      qmk
       logisim-evolution
+      onlyoffice-desktopeditors
     ]
     ++ (mkFcitxIM [
       pkgs.neovim-qt
       pkgs.anki
+    ])
+    ++ (mkElectronWayland [
+      pkgs.ticktick
     ]);
 
   home.sessionVariables = {