style/module.nix: add theming.nix

hosts/hermit/configuration.nix

@@ -59,6 +59,9 @@
       sound.enable = true;
     };
     usrEnv = {
+      theming = {
+        gtk.enable = true;
+      };
       desktops.hyprland.enable = false;
 
       programs = {

hosts/hermit/programs.nix

@@ -85,11 +85,11 @@ in {
       tor-browser
       trash-cli
       typst
-      ungoogled-chromium
       util-linux
       v4l-utils
       vesktop
       vlc
+      vscodium
       weechat
       wireguard-tools
       xournalpp

modules/style/module.nix

@@ -2,5 +2,7 @@ _: {
   imports = [
     ./colors.nix
     ./fonts.nix
+    ./gtk.nix
+    ./theming.nix
   ];
 }

modules/style/theming.nix

@@ -0,0 +1,47 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib.modules) mkMerge mkIf;
+  inherit (lib.options) mkEnableOption;
+  cfg = config.modules.usrEnv.theming;
+in {
+  options.modules.usrEnv.theming = {
+    gtk.enable = mkEnableOption "gtk theming";
+    qt.enable = mkEnableOption "qt theming";
+  };
+  config = mkMerge [
+    (mkIf cfg.gtk.enable {
+      environment = {
+        systemPackages = builtins.attrValues {
+          inherit (pkgs) rose-pine-cursor;
+        };
+        etc = {
+          "xdg/gtk-4.0/settings.ini".text = ''
+            [Settings]
+            gtk-application-prefer-dark-theme=true
+            gtk-cursor-theme-name=BreezeX-RosePine-Linux
+          '';
+
+          "xdg/gtk-3.0/settings.ini".text = ''
+            [Settings]
+            gtk-application-prefer-dark-theme=true
+            gtk-cursor-theme-name=BreezeX-RosePine-Linux
+          '';
+
+          "xdg/gtk-2.0/gtkrc".text = ''
+            gtk-cursor-theme-name = "BreezeX-RosePine-Linux"
+            gtk-cursor-theme-size = 30
+          '';
+
+          "xdg/Xresources".text = ''
+            Xcursor.size: 30
+            Xcursor.theme: BreezeX-RosePine-Linux
+          '';
+        };
+      };
+    })
+  ];
+}