nixcfg/homeManagerModules/desktopEnv/river/default.nix

{
  pkgs,
  lib,
  config,
  ...
}: {
  options = {
    desktopEnv.river.enable =
      lib.mkEnableOption "Enable riverwm with extra apps.";
  };

  config = lib.mkIf config.desktopEnv.river.enable {
    # Basic apps needed to run a hyprland desktop.
    guiApps.waybar.enable = lib.mkDefault true;
    guiApps.mako.enable = lib.mkDefault true;
    guiApps.fuzzel.enable = lib.mkDefault true;
    guiApps.wlogout.enable = lib.mkDefault true;
    guiApps.alacritty.enable = lib.mkDefault true;
    guiApps.firefox.enable = lib.mkDefault true;

    # Packages that should be installed to the user profile.
    home.packages = with pkgs; [
      # brightnessctl
      # hyprnome
      celluloid
      evince
      gnome.eog
      gnome.file-roller
      kanshi
      kdePackages.polkit-kde-agent-1
      networkmanagerapplet
      playerctl
      swayosd
      trayscale
      xfce.exo
      xfce.thunar
      xfce.thunar-archive-plugin
      xfce.thunar-media-tags-plugin
      xfce.thunar-volman
      xfce.tumbler
      xfce.xfce4-settings
      xfce.xfce4-taskmanager
      xfce.xfconf
    ];

    services.cliphist.enable = lib.mkDefault true;
    services.kanshi.enable = true;
    services.kanshi.profiles.framework = {
      outputs = [
        {
          status = "enable";
          criteria = "BOE 0x095F";
          scale = 1.5;
        }
      ];
    };

    xdg.configFile."xfce4/helpers.rc".text = ''
      TerminalEmulator=alacritty
      FileManager=thunar
      WebBrowser=firefox
    '';

    xdg.portal = {
      enable = true;
      configPackages = [pkgs.xdg-desktop-portal-hyprland];
      extraPortals = [pkgs.xdg-desktop-portal-hyprland];
    };

    gtk.gtk3.extraCss = ''
      /* No (default) title bar on wayland */
      headerbar.default-decoration {
        /* You may need to tweak these values depending on your GTK theme */
        margin-bottom: 50px;
        margin-top: -100px;

        background: transparent;
        padding: 0;
        border: 0;
        min-height: 0;
        font-size: 0;
        box-shadow: none;
      }

      /* rm -rf window shadows */
      window.csd,             /* gtk4? */
      window.csd decoration { /* gtk3 */
        box-shadow: none;
      }
    '';

    gtk.gtk4.extraCss = ''
      /* No (default) title bar on wayland */
      headerbar.default-decoration {
        /* You may need to tweak these values depending on your GTK theme */
        margin-bottom: 50px;
        margin-top: -100px;

        background: transparent;
        padding: 0;
        border: 0;
        min-height: 0;
        font-size: 0;
        box-shadow: none;
      }

      /* rm -rf window shadows */
      window.csd,             /* gtk4? */
      window.csd decoration { /* gtk3 */
        box-shadow: none;
      }
    '';

    wayland.windowManager.river.enable = true;
    wayland.windowManager.river.extraConfig = let
      modifier = "Super";

      # Default apps
      browser = pkgs.firefox + "/bin/firefox";
      fileManager = pkgs.xfce.thunar + "/bin/thunar";
      editor = pkgs.vscodium + "/bin/codium";
      terminal = pkgs.alacritty + "/bin/alacritty";

      # Hyprland desktop utilities
      bar = pkgs.waybar + "/bin/waybar";
      launcher = pkgs.fuzzel + "/bin/fuzzel";
      notifyd = pkgs.mako + "/bin/mako";
      # wallpaperd = pkgs.hyprpaper + "/bin/hyprpaper";
      # idle = pkgs.hypridle + "/bin/hypridle";
      logout = pkgs.wlogout + "/bin/wlogout";
      # lock = pkgs.hyprlock + "/bin/hyprlock --immediate";

      brightness = "${pkgs.swayosd}/bin/swayosd-client";
      brightness_up = "${brightness} --brightness=raise";
      brightness_down = "${brightness} --brightness=lower";
      volume = "${pkgs.swayosd}/bin/swayosd-client";
      volume_up = "${volume} --output-volume=raise";
      volume_down = "${volume} --output-volume=lower";
      volume_mute = "${volume} --output-volume=mute-toggle";
      mic_mute = "${volume} --input-volume=mute-toggle";
      media = "${pkgs.playerctl}/bin/playerctl";
      media_play = "${media} play-pause";
      media_next = "${media} next";
      media_previous = "${media} previous";

      # screenshot = "${pkgs.hyprshot}/bin/hyprshot";
      # screenshot_folder = "~/pics/screenshots";
      # screenshot_screen = "${screenshot} -m output -o ${screenshot_folder}";
      # screenshot_region = "${screenshot} -m region -o ${screenshot_folder}";

      # Color, themes, scaling
      border_primary = "ca9ee6ee";
      border_secondary = "99d1dbee";
      border_inactive = "303446aa";
      drop_shadow = "1a1a1aee";
      cursor_size = "24";
      qt_platform_theme = "gtk2";
      gdk_scale = "1.5";
    in ''
      touchpad=`riverctl list-inputs|grep -i touchpad`
       for t in ''${touchpad[@]}; do
         riverctl input $t natural-scroll enabled
         riverctl input $t click-method clickfinger
         riverctl input $t tap enabled
         riverctl input $t disable-while-typing enabled
       done

       riverctl focus-follows-cursor always

       riverctl map normal ${modifier} T spawn ${terminal}
       riverctl map normal ${modifier} R spawn ${launcher}
       riverctl map normal ${modifier} B spawn ${browser}
       riverctl map normal ${modifier} E spawn ${editor}
       riverctl map normal ${modifier} F spawn ${fileManager}

       riverctl map normal ${modifier} M spawn ${logout}

       # ${modifier}+C to close the focused view
       riverctl map normal ${modifier} C close

       # ${modifier}+Shift+E to exit river
       riverctl map normal ${modifier}+Shift E exit

       # ${modifier}+J and ${modifier}+K to focus the next/previous view in the layout stack
       riverctl map normal ${modifier} J focus-view next
       riverctl map normal ${modifier} K focus-view previous

       # ${modifier}+Shift+J and ${modifier}+Shift+K to swap the focused view with the next/previous
       # view in the layout stack
       riverctl map normal ${modifier}+Shift J swap next
       riverctl map normal ${modifier}+Shift K swap previous

       # ${modifier}+Period and ${modifier}+Comma to focus the next/previous output
       riverctl map normal ${modifier} Period focus-output next
       riverctl map normal ${modifier} Comma focus-output previous

       # ${modifier}+Shift+{Period,Comma} to send the focused view to the next/previous output
       riverctl map normal ${modifier}+Shift Period send-to-output next
       riverctl map normal ${modifier}+Shift Comma send-to-output previous

       # ${modifier}+Return to bump the focused view to the top of the layout stack
       riverctl map normal ${modifier} Return zoom

       # ${modifier}+H and ${modifier}+L to decrease/increase the main ratio of rivertile(1)
       riverctl map normal ${modifier} H send-layout-cmd rivertile "main-ratio -0.05"
       riverctl map normal ${modifier} L send-layout-cmd rivertile "main-ratio +0.05"

       # ${modifier}+Shift+H and ${modifier}+Shift+L to increment/decrement the main count of rivertile(1)
       riverctl map normal ${modifier}+Shift H send-layout-cmd rivertile "main-count +1"
       riverctl map normal ${modifier}+Shift L send-layout-cmd rivertile "main-count -1"

       # ${modifier}+Alt+{H,J,K,L} to move views
       riverctl map normal ${modifier}+Alt H move left 100
       riverctl map normal ${modifier}+Alt J move down 100
       riverctl map normal ${modifier}+Alt K move up 100
       riverctl map normal ${modifier}+Alt L move right 100

       # ${modifier}+Alt+Control+{H,J,K,L} to snap views to screen edges
       riverctl map normal ${modifier}+Alt+Control H snap left
       riverctl map normal ${modifier}+Alt+Control J snap down
       riverctl map normal ${modifier}+Alt+Control K snap up
       riverctl map normal ${modifier}+Alt+Control L snap right

       # ${modifier}+Alt+Shift+{H,J,K,L} to resize views
       riverctl map normal ${modifier}+Alt+Shift H resize horizontal -100
       riverctl map normal ${modifier}+Alt+Shift J resize vertical 100
       riverctl map normal ${modifier}+Alt+Shift K resize vertical -100
       riverctl map normal ${modifier}+Alt+Shift L resize horizontal 100

       # ${modifier} + Left Mouse Button to move views
       riverctl map-pointer normal ${modifier} BTN_LEFT move-view

       # ${modifier} + Right Mouse Button to resize views
       riverctl map-pointer normal ${modifier} BTN_RIGHT resize-view

       # ${modifier} + Middle Mouse Button to toggle float
       riverctl map-pointer normal ${modifier} BTN_MIDDLE toggle-float

       for i in $(seq 1 8)
       do
           tags=$((1 << ($i - 1)))

           # ${modifier}+[1-9] to focus tag [0-8]
           riverctl map normal ${modifier} $i set-focused-tags $tags

           # ${modifier}+Shift+[1-9] to tag focused view with tag [0-8]
           riverctl map normal ${modifier}+Shift $i set-view-tags $tags

           # ${modifier}+Control+[1-9] to toggle focus of tag [0-8]
           riverctl map normal ${modifier}+Control $i toggle-focused-tags $tags

           # ${modifier}+Shift+Control+[1-9] to toggle tag [0-8] of focused view
           riverctl map normal ${modifier}+Shift+Control $i toggle-view-tags $tags
       done

       # ${modifier}+0 to focus all tags
       # ${modifier}+Shift+0 to tag focused view with all tags
       all_tags=$(((1 << 32) - 1))
       riverctl map normal ${modifier} 0 set-focused-tags $all_tags
       riverctl map normal ${modifier}+Shift 0 set-view-tags $all_tags

       # ${modifier}+Space to toggle float
       riverctl map normal ${modifier} V toggle-float

       # ${modifier}+F to toggle fullscreen
       riverctl map normal ${modifier} W toggle-fullscreen

       # ${modifier}+{Up,Right,Down,Left} to change layout orientation
       riverctl map normal ${modifier} Up    send-layout-cmd rivertile "main-location top"
       riverctl map normal ${modifier} Right send-layout-cmd rivertile "main-location right"
       riverctl map normal ${modifier} Down  send-layout-cmd rivertile "main-location bottom"
       riverctl map normal ${modifier} Left  send-layout-cmd rivertile "main-location left"

       # Declare a passthrough mode. This mode has only a single mapping to return to
       # normal mode. This makes it useful for testing a nested wayland compositor
       riverctl declare-mode passthrough

       # ${modifier}+F11 to enter passthrough mode
       riverctl map normal ${modifier} F11 enter-mode passthrough

       # ${modifier}+F11 to return to normal mode
       riverctl map passthrough ${modifier} F11 enter-mode normal

       # Various media key mapping examples for both normal and locked mode which do
       # not have a modifier
       for mode in normal locked
       do
           # Eject the optical drive (well if you still have one that is)
           riverctl map $mode None XF86Eject spawn 'eject -T'

           # Control pulse audio volume with pamixer (https://github.com/cdemoulins/pamixer)
           riverctl map $mode None XF86AudioRaiseVolume  spawn '${volume_up}'
           riverctl map $mode None XF86AudioLowerVolume  spawn '${volume_down}'
           riverctl map $mode None XF86AudioMute         spawn '${volume_mute}'

           # Control MPRIS aware media players with playerctl (https://github.com/altdesktop/playerctl)
           riverctl map $mode None XF86AudioMedia spawn '${media_play}'
           riverctl map $mode None XF86AudioPlay  spawn '${media_play}'
           riverctl map $mode None XF86AudioPrev  spawn '${media_previous}'
           riverctl map $mode None XF86AudioNext  spawn '${media_next}'

           # Control screen backlight brightness with brightnessctl (https://github.com/Hummer12007/brightnessctl)
           riverctl map $mode None XF86MonBrightnessUp   spawn '${brightness_up}'
           riverctl map $mode None XF86MonBrightnessDown spawn '${brightness_down}'
       done

       # Set background and border color
       riverctl background-color 0x${border_secondary}
       riverctl border-color-focused 0x${border_primary}
       riverctl border-color-unfocused 0x${border_inactive}

       # Set keyboard repeat rate
       riverctl set-repeat 50 300

       # Set the default layout generator to be rivertile and start it.
       # River will send the process group of the init executable SIGTERM on exit.
       riverctl default-layout rivertile
       rivertile -view-padding 6 -outer-padding 6 &

       pkill -f kanshi && kanshi &
       thunar --daemon &
       pkill -f waybar && waybar &
       pkill -f nm-applet && nm-applet &
       pkill -f mako && mako
       pkill -f swayosd-server && swayosd-server &
    '';
  };
}