nix-config/home/desktop-river/init.nix

{ config, pkgs, ... }:

let
  wallpapers = "${config.home.homeDirectory}/Images/wallpapers/enabled";
  shell = "${pkgs.dash}/bin/dash";
  riverctl = "${pkgs.river}/bin/riverctl";
  rivertile = "${pkgs.river}/bin/rivertile";
  foot = "${pkgs.foot}/bin/foot";
  bemenu-run = "${pkgs.bemenu}/bin/bemenu-run";
  waybar = "${pkgs.waybar}/bin/waybar";
  swaybg = "${pkgs.swaybg}/bin/swaybg";
  seq = "${pkgs.coreutils}/bin/seq";
  playerctl = "${pkgs.playerctl}/bin/playerctl";
  pamixer = "${pkgs.pamixer}/bin/pamixer";
  light = "${pkgs.light}/bin/light";
  eject = "${pkgs.util-linux}/bin/eject";
  find = "${pkgs.findutils}/bin/find";
  shuf = "${pkgs.coreutils}/bin/shuf";
in {
  home.file.river_init = {
    executable = true;
    target = "${config.xdg.configHome}/river/init";
    text = ''
      #!${shell}

      # Super+Return to start an instance of foot (https://codeberg.org/dnkl/foot)
      ${riverctl} map normal Super Return spawn ${foot}

      ${riverctl} map normal Super R spawn ${bemenu-run}

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

      # Super+Shift+Esc to exit river
      ${riverctl} map normal Super+Shift Escape exit

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

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

      # Super+E and Super+W to focus the next/previous output
      ${riverctl} map normal Super E focus-output next
      ${riverctl} map normal Super W focus-output previous

      # Super+Shift+{W,E} to send the focused view to the next/previous output
      ${riverctl} map normal Super+Shift W send-to-output next
      ${riverctl} map normal Super+Shift W send-to-output previous

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

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

      # Super+Shift+Comma and Super+Shift+Period. to increment/decrement the main count of rivertile(1)
      ${riverctl} map normal Super+Shift Comma  send-layout-cmd rivertile "main-count +1"
      ${riverctl} map normal Super+Shift Period send-layout-cmd rivertile "main-count -1"

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

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

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

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

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

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

      for i in $(${seq} 1 9)
      do
          tags=$((1 << ($i - 1)))

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

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

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

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

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

      # Super+T to toggle float
      ${riverctl} map normal Super T toggle-float

      # Super+M to toggle fullscreen
      ${riverctl} map normal Super M toggle-fullscreen

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

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

      # Super+F11 to return to normal mode
      ${riverctl} map passthrough Super 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 $mode None XF86AudioRaiseVolume  spawn '${pamixer} -i 5'
          ${riverctl} map $mode None XF86AudioLowerVolume  spawn '${pamixer} -d 5'
          ${riverctl} map $mode None XF86AudioMute         spawn '${pamixer} --toggle-mute'

          # Control MPRIS aware media players with playerctl (https://github.com/altdesktop/playerctl)
          ${riverctl} map $mode None XF86AudioMedia spawn '${playerctl} play-pause'
          ${riverctl} map $mode None XF86AudioPlay  spawn '${playerctl} play-pause'
          ${riverctl} map $mode None XF86AudioPrev  spawn '${playerctl} previous'
          ${riverctl} map $mode None XF86AudioNext  spawn '${playerctl} next'

          # Control screen backlight brightness with light (https://github.com/haikarainen/light)
          ${riverctl} map $mode None XF86MonBrightnessUp   spawn '${light} -A 5'
          ${riverctl} map $mode None XF86MonBrightnessDown spawn '${light} -U 5'
      done

      # Set background and border color
      ${riverctl} background-color 0x282828
      ${riverctl} border-color-focused 0x458588
      ${riverctl} border-color-unfocused 0x504945
      ${riverctl} border-width 3

      ${riverctl} focus-follows-cursor normal

      # Set keyboard repeat rate
      ${riverctl} set-repeat 50 300

      # Make certain views start floating
      ${riverctl} float-filter-add app-id float
      ${riverctl} float-filter-add title "popup title with spaces"

      # Set app-ids and titles of views which should use client side decorations
      ${riverctl} csd-filter-add app-id "gedit"

      ${riverctl} spawn "dbus-update-activation-environment --systemd WAYLAND_DISPLAY XDG_CURRENT_DESKTOP=river"
      ${riverctl} spawn "systemctl --user import-environment WAYLAND_DISPLAY XDG_CURRENT_DESKTOP=river"
      ${riverctl} spawn "${waybar}"

      ${riverctl} spawn '${swaybg} --image "$(${find} ${wallpapers} -type f | ${shuf} -n 1)" --mode fill'

      # 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 0 -outer-padding 0 &
    '';
  };
}