add splatmoji package and sway config

modules/home-manager/default.nix

@@ -26,6 +26,7 @@ in
     ./mpv.nix
     ./nb.nix
     ./neovim.nix
+    ./splatmoji.nix
     ./ssh.nix
     ./sublime-music.nix
     ./vlc.nix

modules/home-manager/splatmoji.nix

@@ -0,0 +1,20 @@
+# borrows from:
+# - default config: <https://github.com/cspeterson/splatmoji/blob/master/splatmoji.config>
+# - wayland: <https://github.com/cspeterson/splatmoji/issues/32#issuecomment-830862566>
+{ pkgs, ... }:
+
+{
+  home-manager.users.colin = {
+    xdg.configFile."splatmoji/splatmoji.config".text = ''
+      history_file=/home/colin/.local/state/splatmoji/history
+      history_length=5
+      # TODO: wayland equiv
+      paste_command=xdotool key ctrl+v
+      # rofi_command=${pkgs.wofi}/bin/wofi --dmenu --insensitive --cache-file /dev/null
+      rofi_command=${pkgs.fuzzel}/bin/fuzzel -d -i -w 80
+      xdotool_command=${pkgs.wtype}/bin/wtype
+      # TODO: wayland equiv
+      xsel_command=xsel -b -i
+    '';
+  };
+}