feat: add chinese hanyu input methods

hm/modules/linux/desktop-environment/hyprland/default.nix

@@ -65,6 +65,13 @@ in
         Whether to enable `hyprsunset` as a daemon.
       '';
     };
+    fcitx5.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = osConfig.i18n.inputMethod.enable && (osConfig.i18n.inputMethod.type == "fcitx5");
+      description = ''
+        Whether to execute fcitx5 at startup.
+      '';
+    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -86,9 +93,14 @@ in
       enable = true;
       plugins = [ pkgs.hyprlandPlugins.hyprscroller ];
       settings = {
-        exec-once = [
+        exec-once =
+          [
             "hyprctl dispatch workspace 100000"
-        ];
+          ]
+          ++ (lib.optionals cfg.fcitx5.enable [
+            "fcitx5 -d -r"
+            "fcitx5-remote -r"
+          ]);
         "$mod" = "SUPER";
         "$Left" = "H";
         "$Right" = "L";

hm/modules/linux/desktop-environment/hyprland/windowrules.nix

@@ -1,7 +1,11 @@
 { config, lib, ... }:
+let
+  cfg = config.liminalOS.desktop.hyprland;
+in
 {
   config.wayland.windowManager.hyprland.settings.windowrulev2 =
     lib.mkIf config.liminalOS.desktop.hyprland.enable
+      (
         [
           "opacity 0.90 0.90,class:^(librewolf)$"
           "opacity 0.90 0.90,class:^(floorp)$"
@@ -93,5 +97,9 @@
           "size 50% 50%,class:^(org.pulseaudio.pavucontrol)"
 
           "stayfocused, class:^(pinentry-)" # fix pinentry losing focus
-      ];
+        ]
+        ++ (lib.optionals cfg.fcitx5.enable [
+          "pseudo, class:^(fcitx)"
+        ])
+      );
 }

modules/linux/default.nix

@@ -15,6 +15,7 @@
     ./wine
     ./wsl
     ./graphics
+    ./localization
   ];
 
   options.liminalOS.enable = lib.mkOption {

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";
+        };
+
+      };
+    };
+  };
+}

reference/modules/default.nix

@@ -144,6 +144,8 @@
     polarity = lib.mkDefault "dark";
   };
 
+  liminalOS.desktop.localization.chinese.input.enable = true;
+
   environment.etc.polarity.text = lib.mkDefault "dusk";
 
   specialisation = {