nix-stuff/roles/kde/plasma.nix

{
  config,
  pkgs,
  lib,
  flakeSelf,
  ...
}: let
  # Set up the default kde options
  balooExcludedDirs = lib.strings.intersperse "," [
    "$HOME/.cache/"
    "$HOME/.config/"
    "$HOME/.local/"
  ];

  baloofilerc = lib.generators.toINI {} {
    General = {
      # The [$e] part allows you to use environment variables
      "exclude folders[$e]" = lib.strings.concatStrings balooExcludedDirs;
    };
  };

  # Make custom packages
  breezeTint = pkgs.stdenv.mkDerivation {
    name = "breeze-tint";
    src = "${pkgs.breeze-qt5}";
    patches = [./patches/BreezeTint.patch];
    installPhase = ''
      runHook preInstall

      mkdir -p $out/share/color-schemes/
      cp -r share/color-schemes/* $out/share/color-schemes/

      runHook postInstall
    '';
  };

  # /etc/xdg is not read by plasma, so to change the default settings you need to put them in a package
  plasmaDefaults = pkgs.stdenv.mkDerivation {
    name = "toast-plasma-defaults";
    dontUnpack = true;
    installPhase = ''
      runHook preInstall

      set -x
      mkdir -p $out/etc/xdg
      echo '${baloofilerc}' > $out/etc/xdg/baloofilerc

      runHook postInstall
    '';
  };
in {
  services.xserver = {
    # Enable the Plasma 5 Desktop Environment
    desktopManager.plasma5.enable = true;
    displayManager.defaultSession = "plasmawayland";
  };

  qt.enable = true;

  # GTK apps need dconf to grab the correct theme on Wayland
  programs.dconf.enable = true;

  # Install the patched Breeze color schemes as well as the plasma default configs
  environment.systemPackages = [breezeTint plasmaDefaults];

  # Plasma configs should be on all users
  home-manager.sharedModules = [
    (
      {config, ...}: let
        gtk2rc = "${config.xdg.configHome}/gtk-2.0/gtkrc";
      in {
        gtk.gtk2.configLocation = gtk2rc;
        # Kde has an annoying habit of overwriting the gtk2 config file
        home.file."${gtk2rc}".force = true;
      }
    )
    {
      imports = [flakeSelf.inputs.plasma-manager.homeManagerModules.plasma-manager];
      gtk = {
        enable = true;
        # Most apps are dark, so a white cursor is easier to spot
        cursorTheme = {
          package = pkgs.breeze-qt5;
          name = "Breeze_Snow";
        };
        iconTheme = {
          package = pkgs.breeze-icons;
          name = "breeze-dark";
        };
        theme = {
          package = pkgs.breeze-gtk;
          name = "Breeze";
        };
        # Gtk2 doesn't have a dark mode, so I just tell gtk 3 and 4 to use the dark variant
        gtk3.extraConfig.gtk-application-prefer-dark-theme = true;
        gtk4.extraConfig.gtk-application-prefer-dark-theme = true;
      };
      home.packages = [
        (
          pkgs.catppuccin-kde.override {
            flavour = ["mocha"];
            accents = ["mauve"];
            winDecStyles = ["classic"];
          }
        )
      ];
      programs.plasma = {
        enable = true;
        overrideConfig = true;
        # Delete config files that I fully configure here
        overrideConfigFiles = [
          "plasmashellrc"
          "plasma-org.kde.plasma.desktop-appletsrc"
        ];
        workspace = {
          clickItemTo = "select";
          cursorTheme = "Breeze_Snow";
          iconTheme = "breeze-dark";
          lookAndFeel = "Catppuccin-Mocha-Mauve";
          theme = "default";
          colorScheme = "CatppuccinMochaMauve";
        };
        kwin = {
          titlebarButtons = {
            left = ["on-all-desktops" "keep-above-windows"];
            right = ["minimize" "maximize" "close"];
          };
        };
        panels = [
          {
            location = "bottom";
            height = 44;
            widgets = [
              {
                name = "org.kde.plasma.kickoff";
                config.General.icon = "nix-snowflake-white";
              }
              "org.kde.plasma.pager"
              "org.kde.plasma.icontasks"
              "org.kde.plasma.marginsseparator"
              "org.kde.plasma.systemtray"
              {
                name = "org.kde.plasma.digitalclock";
                config.Appearance.showSeconds = "true";
              }
              "org.kde.plasma.showdesktop"
            ];
          }
        ];
        shortcuts = {
          "kwin" = {
            "Switch One Desktop to the Left" = ["Meta+Ctrl+Left"];
            "Switch One Desktop to the Right" = ["Meta+Ctrl+Right"];
          };
        };
        configFile = {
          "kwinrc" = {
            "org\\.kde\\.kdecoration2"."BorderSize" = "None";
            "Desktops" = {
              "Number" = 2;
              "Rows" = 1;
            };
            "TabBox"."LayoutName" = "thumbnail_grid";
          };
          "kdeglobals"."General"."AccentColor" = null;
          "auroraerc"."CatppuccinMocha-Classic"."ButtonSize" = 0;
          "plasmanotifyrc"."Notifications"."NormalAlwaysOnTop" = true;
        };
      };
    }
  ];
}