1 files changed, 44 insertions, 0 deletions
diff --git a/nixos/modules/i18n/input-method/fcitx.nix b/nixos/modules/i18n/input-method/fcitx.nix
new file mode 100644
index 00000000000..8e31743504f
--- /dev/null
+++ b/nixos/modules/i18n/input-method/fcitx.nix
@@ -0,0 +1,44 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.i18n.inputMethod.fcitx;
+  fcitxPackage = pkgs.fcitx-with-plugins.override { plugins = cfg.engines; };
+  fcitxEngine = types.package // {
+    name  = "fcitx-engine";
+    check = x: (lib.types.package.check x) && (attrByPath ["meta" "isFcitxEngine"] false x);
+  };
+in
+{
+  options = {
+
+    i18n.inputMethod.fcitx = {
+      engines = mkOption {
+        type    = with types; listOf fcitxEngine;
+        default = [];
+        example = literalExample "with pkgs.fcitx-engines; [ mozc hangul ]";
+        description =
+          let
+            engines =
+              lib.concatStringsSep ", "
+              (map (name: "<literal>${name}</literal>")
+               (lib.attrNames pkgs.fcitx-engines));
+          in
+            "Enabled Fcitx engines. Available engines are: ${engines}.";
+      };
+    };
+
+  };
+
+  config = mkIf (config.i18n.inputMethod.enabled == "fcitx") {
+    environment.systemPackages = [ fcitxPackage ];
+
+    environment.variables = {
+      GTK_IM_MODULE = "fcitx";
+      QT_IM_MODULE  = "fcitx";
+      XMODIFIERS    = "@im=fcitx";
+    };
+    services.xserver.displayManager.sessionCommands = "${fcitxPackage}/bin/fcitx";
+  };
+}