feat(sway): port keybindings, modes and tweaks from dotfiles

Adapted from emmaisadev/dotfiles (sway/config.d) into the Nix config:

- Screenshots to swappy: Print = drag a region, Shift+Print = focused
  window (a writeShellScript reusing the grimshot.sh tree/jq logic).
  Replaces the old plain full-screen grim->file.
- Workspace cycle Mod+z / Mod+x (prev/next).
- Media keys (playerctl) and mic mute (wpctl source).
- Re-home `focus mode_toggle` onto Mod+Alt+space (Mod+Space is the
  launcher now).
- Clipboard history: services.clipman stores copies; Mod+c picks one
  through a Catppuccin-themed fuzzel (programs.fuzzel).
- Binding modes: a layout submenu (Mod+y -> s/w/e, which also restores
  split-toggle that Mod+e gave up to nemo) and a power menu
  (Mod+Shift+x -> lock/exit/sleep/reboot/shutdown). Mod+l still locks
  immediately.
- Touchpad tap + natural scroll (laptops; inert on desktop).
- Solid Catppuccin base as the wallpaper (output * bg, no image).
- foot: term=xterm-256color and scrollback 100000 (colours unchanged).
- swaywm.nix: add slurp/swappy/jq/playerctl to the session packages.

Skipped from the dotfiles: named workspaces + app auto-assign, the foot
--server/footclient setup, and pactl/MX-Master/lxqt device-specific bits.
All in the shared files, so every Sway host gets it.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyrathorpe/home/sway.nix

@@ -19,6 +19,19 @@ let
   # where a consumer needs it -- Sway/i3status/dunst want "#", foot/swaylock do
   # not.
   ctp = import ../catppuccin-mocha.nix;
+
+  # Focused-window screenshot -> swappy editor (the dotfiles' grimshot.sh logic).
+  # Full store paths so it needs nothing on PATH.
+  screenshotWindow = pkgs.writeShellScript "screenshot-window" ''
+    ${pkgs.grim}/bin/grim -g "$(${pkgs.sway}/bin/swaymsg -t get_tree \
+      | ${pkgs.jq}/bin/jq -r '.. | select(.focused?) | .rect | "\(.x),\(.y) \(.width)x\(.height)"')" \
+      - | ${pkgs.swappy}/bin/swappy -f -
+  '';
+
+  # Binding-mode names. The string is both the `modes` attr key and what the
+  # bar's mode indicator shows, so the keys are spelled out in the label.
+  layoutMode = "layout:  [s]tacking  [w]tabbed  [e]split";
+  systemMode = "system:  [l]ock  [e]xit  [s]leep  [r]eboot  [Shift+s]shutdown";
 in
 {
   wayland.windowManager.sway = {
@@ -39,6 +52,15 @@ in
         xkb_layout = "us";
         xkb_variant = "dvorak";
       };
+      # Touchpads (laptops): tap-to-click and natural scrolling. Inert on the
+      # desktop hosts, which have no touchpad.
+      input."type:touchpad" = {
+        tap = "enabled";
+        natural_scroll = "enabled";
+      };
+
+      # Solid Catppuccin Mocha base as the wallpaper (no image dependency).
+      output."*".bg = "#${ctp.base} solid_color";
 
       # Window borders -- Catppuccin Mocha (blue accent on the focused window).
       colors = {
@@ -79,6 +101,33 @@ in
         }
       ];
 
+      # Binding modes (submenus). Entered from keybindings below; each action
+      # returns to the default mode. mkOptionDefault-merged with the module's
+      # built-in "resize" mode.
+      modes = {
+        # Layout submenu (Mod+y). Mirrors Sway's default s/w/e layout keys --
+        # notably it restores split-toggle, which moved off Mod+e when that
+        # became the nemo launcher.
+        ${layoutMode} = {
+          "s" = "layout stacking, mode default";
+          "w" = "layout tabbed, mode default";
+          "e" = "layout toggle split, mode default";
+          "Return" = "mode default";
+          "Escape" = "mode default";
+        };
+        # Power menu (Mod+Shift+x). Lock reuses the themed swaylock; the rest go
+        # through systemd/logind (allowed for the active local session).
+        ${systemMode} = {
+          "l" = "exec ${pkgs.swaylock}/bin/swaylock -f, mode default";
+          "e" = "exec ${pkgs.sway}/bin/swaymsg exit, mode default";
+          "s" = "exec systemctl suspend, mode default";
+          "r" = "exec systemctl reboot, mode default";
+          "Shift+s" = "exec systemctl poweroff, mode default";
+          "Return" = "mode default";
+          "Escape" = "mode default";
+        };
+      };
+
       bars = [
         {
           position = "top";
@@ -134,10 +183,39 @@ in
           # File manager. mkForce overrides the module default (layout toggle split).
           "${modifier}+e" = lib.mkForce "exec ${pkgs.nemo}/bin/nemo";
           "${modifier}+l" = "exec ${pkgs.swaylock}/bin/swaylock -f";
-          "Print" = "exec ${pkgs.grim}/bin/grim ~/screenshot-$(date +%F-%H%M%S).png";
+
+          # Cycle workspaces.
+          "${modifier}+z" = "workspace prev";
+          "${modifier}+x" = "workspace next";
+
+          # focus mode_toggle (tiling <-> floating focus) -- re-homed off
+          # Mod+Space, which is now the launcher.
+          "${modifier}+Mod1+space" = "focus mode_toggle";
+
+          # Enter the binding-mode submenus defined above.
+          "${modifier}+y" = "mode \"${layoutMode}\"";
+          "${modifier}+Shift+x" = "mode \"${systemMode}\"";
+
+          # Clipboard history: pick a past entry through fuzzel (clipman stores
+          # it -- see services.clipman below).
+          "${modifier}+c" =
+            "exec ${pkgs.clipman}/bin/clipman pick -t CUSTOM --tool-args=\"${pkgs.fuzzel}/bin/fuzzel --dmenu\"";
+
+          # Screenshots -> swappy editor: Print = drag a region, Shift+Print =
+          # the focused window.
+          "Print" =
+            "exec ${pkgs.grim}/bin/grim -g \"$(${pkgs.slurp}/bin/slurp)\" - | ${pkgs.swappy}/bin/swappy -f -";
+          "Shift+Print" = "exec ${screenshotWindow}";
+
           "XF86AudioRaiseVolume" = "exec ${pkgs.wireplumber}/bin/wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%+";
           "XF86AudioLowerVolume" = "exec ${pkgs.wireplumber}/bin/wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%-";
           "XF86AudioMute" = "exec ${pkgs.wireplumber}/bin/wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle";
+          "XF86AudioMicMute" = "exec ${pkgs.wireplumber}/bin/wpctl set-mute @DEFAULT_AUDIO_SOURCE@ toggle";
+
+          # Media keys (MPRIS via playerctl).
+          "XF86AudioPlay" = "exec ${pkgs.playerctl}/bin/playerctl play-pause";
+          "XF86AudioNext" = "exec ${pkgs.playerctl}/bin/playerctl next";
+          "XF86AudioPrev" = "exec ${pkgs.playerctl}/bin/playerctl previous";
         }
         # Screen backlight: laptops only (no internal backlight on a desktop).
         // lib.optionalAttrs portable {
@@ -158,6 +236,13 @@ in
     # "<text> <cursor>" (man foot.ini(5): "ff0000 00ff00" => green cursor, red
     # text). Only colors-dark is needed; we never set initial-color-theme=light.
     settings = {
+      main = {
+        # Advertise as xterm-256color so remote hosts without foot's terminfo
+        # still behave (tmux re-adds foot's RGB/sync/etc. features -- see
+        # shell.nix). The [main] section is the unheadered top of foot.ini.
+        term = "xterm-256color";
+      };
+      scrollback.lines = 100000;
       "colors-dark" = {
         background = ctp.base;
         foreground = ctp.text;
@@ -184,6 +269,38 @@ in
     };
   };
 
+  # Clipboard history: a user service runs `wl-paste --watch clipman store`,
+  # bound to the Wayland session, so copies persist and Mod+c (above) can pick
+  # an old entry through fuzzel.
+  services.clipman.enable = true;
+
+  # fuzzel: the dmenu picker used by clipman, themed Catppuccin Mocha to match
+  # (fuzzel colours are RRGGBBAA -- 8 hex digits).
+  programs.fuzzel = {
+    enable = true;
+    settings = {
+      main = {
+        font = "Noto Sans:size=12";
+        prompt = "\"clipboard \"";
+      };
+      border = {
+        width = 2;
+        radius = 8;
+      };
+      colors = {
+        background = "${ctp.base}f0";
+        text = "${ctp.text}ff";
+        prompt = "${ctp.subtext0}ff";
+        input = "${ctp.text}ff";
+        match = "${ctp.blue}ff";
+        selection = "${ctp.surface1}ff";
+        selection-text = "${ctp.text}ff";
+        selection-match = "${ctp.blue}ff";
+        border = "${ctp.blue}ff";
+      };
+    };
+  };
+
   programs.swaylock = {
     enable = true;
     # Catppuccin Mocha (swaylock colours are hex without "#").

lyrathorpe/swaywm.nix

@@ -37,6 +37,10 @@ in
         brightnessctl
         foot
         grim
+        slurp # region selection for screenshots
+        swappy # screenshot annotation/save
+        jq # used by the focused-window screenshot bind
+        playerctl # MPRIS media keys
         sway-launcher-desktop
         pavucontrol
       ];