helm/modules/themes/alucard/default.nix

# modules/themes/alucard/default.nix --- a regal dracula-inspired theme

{ options, config, lib, pkgs, ... }:

with lib;
with lib.my;
let cfg = config.modules.theme;
in {
  config = mkIf (cfg.active == "alucard") (mkMerge [
    # Desktop-agnostic configuration
    {
      modules = {
        theme = {
          wallpaper = mkDefault ./config/wallpaper.png;
          gtk = {
            theme = "Dracula";
            iconTheme = "Paper";
            cursorTheme = "Paper";
          };
        };

        shell.zsh.rcFiles  = [ ./config/zsh/prompt.zsh ];
        shell.tmux.rcFiles = [ ./config/tmux.conf ];
        desktop.browsers = {
          firefox.userChrome = concatMapStringsSep "\n" readFile [
            ./config/firefox/userChrome.css
          ];
          qutebrowser.userStyles = concatMapStringsSep "\n" readFile
            (map toCSSFile [
              ./config/qutebrowser/userstyles/monospace-textareas.scss
              ./config/qutebrowser/userstyles/stackoverflow.scss
              ./config/qutebrowser/userstyles/xkcd.scss
            ]);
        };
      };
    }

    # Desktop (X11) theming
    (mkIf config.services.xserver.enable {
      user.packages = with pkgs; [
        unstable.dracula-theme
        paper-icon-theme # for rofi
      ];
      fonts = {
        fonts = with pkgs; [
          fira-code
          fira-code-symbols
          jetbrains-mono
          siji
          font-awesome-ttf
        ];
        fontconfig.defaultFonts = {
          sansSerif = ["Fira Sans"];
          monospace = ["Fira Code"];
        };
      };

      # Compositor
      services.picom = {
        fade = true;
        fadeDelta = 1;
        fadeSteps = [ 0.01 0.012 ];
        shadow = true;
        shadowOffsets = [ (-10) (-10) ];
        shadowOpacity = 0.22;
        # activeOpacity = "1.00";
        # inactiveOpacity = "0.92";
        settings = {
          shadow-radius = 12;
          # blur-background = true;
          # blur-background-frame = true;
          # blur-background-fixed = true;
          blur-kern = "7x7box";
          blur-strength = 320;
        };
      };

      # Login screen theme
      services.xserver.displayManager.lightdm.greeters.mini.extraConfig = ''
        text-color = "#ff79c6"
        password-background-color = "#1E2029"
        window-color = "#181a23"
        border-color = "#181a23"
      '';

      # Other dotfiles
      home.configFile = with config.modules; mkMerge [
        {
          # Sourced from sessionCommands in modules/themes/default.nix
          "xtheme/90-theme".source = ./config/Xresources;
        }
        (mkIf desktop.bspwm.enable {
          "bspwm/rc.d/polybar".source = ./config/polybar/run.sh;
          "bspwm/rc.d/theme".source = ./config/bspwmrc;
        })
        (mkIf desktop.apps.rofi.enable {
          "rofi/theme" = { source = ./config/rofi; recursive = true; };
        })
        (mkIf (desktop.bspwm.enable || desktop.stumpwm.enable) {
          "polybar" = { source = ./config/polybar; recursive = true; };
          "dunst/dunstrc".source = ./config/dunstrc;
        })
        (mkIf desktop.media.graphics.vector.enable {
          "inkscape/templates/default.svg".source = ./config/inkscape/default-template.svg;
        })
        (mkIf desktop.browsers.qutebrowser.enable {
          "qutebrowser/extra/theme.py".source = ./config/qutebrowser/theme.py;
        })
      ];
    })
  ]);
}