i18n.inputMethod: add module

modules/i18n/input-method/uim.nix

@@ -0,0 +1,45 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let cfg = config.i18n.inputMethod.uim;
+in {
+  options = {
+
+    i18n.inputMethod.uim = {
+      toolbar = mkOption {
+        type = types.enum [ "gtk" "gtk3" "gtk-systray" "gtk3-systray" "qt4" ];
+        default = "gtk";
+        example = "gtk-systray";
+        description = ''
+          Selected UIM toolbar.
+        '';
+      };
+    };
+
+  };
+
+  config = mkIf (config.i18n.inputMethod.enabled == "uim") {
+    i18n.inputMethod.package = pkgs.uim;
+
+    home.sessionVariables = {
+      GTK_IM_MODULE = "uim";
+      QT_IM_MODULE = "uim";
+      XMODIFIERS = "@im=uim";
+    };
+
+    systemd.user.services.uim-daemon = {
+      Unit = {
+        Description = "Uim input method editor";
+        PartOf = [ "graphical-session.desktop" ];
+      };
+      Service.ExecStart = toString
+        (pkgs.writeShellScript "start-uim-xim-and-uim-toolbar" ''
+          ${pkgs.uim}/bin/uim-xim &
+          ${pkgs.uim}/bin/uim-toolbar-${cfg.toolbar}
+        '');
+      Install.WantedBy = [ "graphical-session.target" ];
+    };
+  };
+
+}