feat: add chinese hanyu input methods

modules/linux/localization/default.nix

@@ -0,0 +1,143 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+let
+  cfg = config.liminalOS.desktop.localization;
+in
+{
+  options.liminalOS.desktop.localization = {
+    chinese.input.enable = lib.mkEnableOption "Chinese input method using fcitx5.";
+    chinese.script = lib.mkOption {
+      type = lib.types.enum [
+        "simplified"
+        "traditional"
+      ];
+      default = "simplified";
+      description = ''
+        Whether to use simplified or traditional characters.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.chinese.input.enable {
+    i18n.inputMethod = {
+      enable = true;
+      type = "fcitx5";
+      fcitx5.waylandFrontend = true;
+      fcitx5.addons = with pkgs; [
+        fcitx5-gtk
+        fcitx5-chinese-addons
+        fcitx5-tokyonight
+      ];
+      fcitx5.settings.globalOptions = {
+        Hotkey = {
+          # Enumerate when press trigger key repeatedly
+          EnumerateWithTriggerKeys = true;
+          # Temporally switch between first and current Input Method
+          AltTriggerKeys = null;
+          # Enumerate Input Method Forward
+          EnumerateForwardKeys = null;
+          # Enumerate Input Method Backward
+          EnumerateBackwardKeys = null;
+          # Skip first input method while enumerating
+          EnumerateSkipFirst = false;
+          # Enumerate Input Method Group Forward
+          EnumerateGroupForwardKeys = null;
+          # Enumerate Input Method Group Backward
+          EnumerateGroupBackwardKeys = null;
+          # Activate Input Method
+          ActivateKeys = null;
+          # Deactivate Input Method
+          DeactivateKeys = null;
+          # Default Previous page
+          PrevPage = null;
+          # Default Next page
+          NextPage = null;
+          # Default Previous Candidate
+          PrevCandidate = null;
+          # Default Next Candidate
+          NextCandidate = null;
+          # Toggle embedded preedit
+          TogglePreedit = null;
+          # Time limit in milliseconds for triggering modifier key shortcuts
+          ModifierOnlyKeyTimeout = 250;
+        };
+
+        "Hotkey/TriggerKeys" = {
+          "0" = "Control+Super+space";
+          "1" = "Zenkaku_Hankaku";
+          "2" = "Hangul";
+        };
+
+        Behavior = {
+          # Active By Default;
+          ActiveByDefault = false;
+          # Reset state on Focus In;
+          resetStateWhenFocusIn = "No";
+          # Share Input State;
+          ShareInputState = "No";
+          # Show preedit in application;
+          PreeditEnabledByDefault = true;
+          # Show Input Method Information when switch input method;
+          ShowInputMethodInformation = true;
+          # Show Input Method Information when changing focus;
+          showInputMethodInformationWhenFocusIn = false;
+          # Show compact input method information;
+          CompactInputMethodInformation = true;
+          # Show first input method information;
+          ShowFirstInputMethodInformation = true;
+          # Default page size;
+          DefaultPageSize = 10;
+          # Override Xkb Option;
+          OverrideXkbOption = false;
+          # Custom Xkb Option;
+          CustomXkbOption = "";
+          # Force Enabled Addons;
+          EnabledAddons = "";
+          # Force Disabled Addons;
+          DisabledAddons = "";
+          # Preload input method to be used by default;
+          PreloadInputMethod = true;
+          # Allow input method in the password field;
+          AllowInputMethodForPassword = false;
+          # Show preedit text when typing password;
+          ShowPreeditForPassword = false;
+          # Interval of saving user data in minutes;
+          AutoSavePeriod = 30;
+
+        };
+      };
+      fcitx5.settings.inputMethod = {
+        "Groups/0" = {
+          # Group Name
+          Name = "Default";
+          # Layout
+          "Default Layout" = "us";
+          # Default Input Method
+          DefaultIM = "pinyin";
+        };
+        "Groups/0/Items/0" = {
+          # Name
+          Name = "keyboard-us";
+          # Layout
+          Layout = "";
+        };
+
+        "Groups/0/Items/1" = {
+          # Name
+          Name = "pinyin";
+          # Layout
+          Layout = "";
+        };
+
+        "GroupOrder" = {
+          "0" = "Default";
+        };
+
+      };
+    };
+  };
+}