1 files changed, 74 insertions, 0 deletions
diff --git a/nixos/modules/i18n/input-method/default.nix b/nixos/modules/i18n/input-method/default.nix
new file mode 100644
index 00000000000..bbc5783565a
--- /dev/null
+++ b/nixos/modules/i18n/input-method/default.nix
@@ -0,0 +1,74 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+let
+  cfg = config.i18n.inputMethod;
+
+  gtk2_cache = pkgs.runCommand "gtk2-immodule.cache"
+    { preferLocalBuild = true;
+      allowSubstitutes = false;
+      buildInputs = [ pkgs.gtk2 cfg.package ];
+    }
+    ''
+      mkdir -p $out/etc/gtk-2.0/
+      GTK_PATH=${cfg.package}/lib/gtk-2.0/ gtk-query-immodules-2.0 > $out/etc/gtk-2.0/immodules.cache
+    '';
+
+  gtk3_cache = pkgs.runCommand "gtk3-immodule.cache"
+    { preferLocalBuild = true;
+      allowSubstitutes = false;
+      buildInputs = [ pkgs.gtk3 cfg.package ];
+    }
+    ''
+      mkdir -p $out/etc/gtk-3.0/
+      GTK_PATH=${cfg.package}/lib/gtk-3.0/ gtk-query-immodules-3.0 > $out/etc/gtk-3.0/immodules.cache
+    '';
+
+in
+{
+  options.i18n = {
+    inputMethod = {
+      enabled = mkOption {
+        type    = types.nullOr (types.enum [ "ibus" "fcitx" "fcitx5" "nabi" "uim" "hime" "kime" ]);
+        default = null;
+        example = "fcitx";
+        description = ''
+          Select the enabled input method. Input methods is a software to input symbols that are not available on standard input devices.
+
+          Input methods are specially used to input Chinese, Japanese and Korean characters.
+
+          Currently the following input methods are available in NixOS:
+
+          <itemizedlist>
+          <listitem><para>ibus: The intelligent input bus, extra input engines can be added using <literal>i18n.inputMethod.ibus.engines</literal>.</para></listitem>
+          <listitem><para>fcitx: A customizable lightweight input method, extra input engines can be added using <literal>i18n.inputMethod.fcitx.engines</literal>.</para></listitem>
+          <listitem><para>fcitx5: The next generation of fcitx, addons (including engines, dictionaries, skins) can be added using <literal>i18n.inputMethod.fcitx5.addons</literal>.</para></listitem>
+          <listitem><para>nabi: A Korean input method based on XIM. Nabi doesn't support Qt 5.</para></listitem>
+          <listitem><para>uim: The universal input method, is a library with a XIM bridge. uim mainly support Chinese, Japanese and Korean.</para></listitem>
+          <listitem><para>hime: An extremely easy-to-use input method framework.</para></listitem>
+          <listitem><para>kime: Koream IME.</para></listitem>
+          </itemizedlist>
+        '';
+      };
+
+      package = mkOption {
+        internal = true;
+        type     = types.nullOr types.path;
+        default  = null;
+        description = ''
+          The input method method package.
+        '';
+      };
+    };
+  };
+
+  config = mkIf (cfg.enabled != null) {
+    environment.systemPackages = [ cfg.package gtk2_cache gtk3_cache ];
+  };
+
+  meta = {
+    maintainers = with lib.maintainers; [ ericsagnes ];
+    doc = ./default.xml;
+  };
+
+}