hyprland: allow closing submaps on dispatch

This adds an 'onDispatch' option to the 'submaps' attribute set,
enabling the 'submap = name, ondispatch' syntax which allows submaps to
be closed automatically after a dispatch.

modules/services/window-managers/hyprland.nix

@@ -238,6 +238,14 @@ in
           { name, config, ... }:
           {
             options = {
+              onDispatch = lib.mkOption {
+                type = lib.types.str;
+                default = "";
+                description = ''
+                  Submap to use after a dispatch. Can either be a name or `reset` to disable submap after any dispatch.
+                '';
+                example = "reset";
+              };
               settings = lib.mkOption {
                 type = (with lib.types; attrsOf (listOf str)) // {
                   description = "Hyprland binds";
@@ -348,8 +356,11 @@ in
     warnings =
       let
         inconsistent =
-          (cfg.systemd.enable || cfg.plugins != [ ]) && cfg.extraConfig == "" && cfg.settings == { };
-        warning = "You have enabled hyprland.systemd.enable or listed plugins in hyprland.plugins but do not have any configuration in hyprland.settings or hyprland.extraConfig. This is almost certainly a mistake.";
+          (cfg.systemd.enable || cfg.plugins != [ ])
+          && cfg.extraConfig == ""
+          && cfg.settings == { }
+          && cfg.submaps == { };
+        warning = "You have enabled hyprland.systemd.enable or listed plugins in hyprland.plugins but do not have any configuration in hyprland.settings, hyprland.extraConfig or hyprland.submaps. This is almost certainly a mistake.";
 
         filterNonBinds =
           attrs: builtins.filter (n: builtins.match "bind[[:lower:]]*" n == null) (builtins.attrNames attrs);
@@ -391,7 +402,7 @@ in
           };
 
         mkSubMap = name: attrs: ''
-          submap = ${name}
+          submap = ${name}${lib.optionalString (attrs.onDispatch != "") ", ${attrs.onDispatch}"}
           ${
             lib.hm.generators.toHyprconf {
               attrs = attrs.settings;

tests/modules/services/hyprland/default.nix

@@ -9,4 +9,5 @@ lib.optionalAttrs pkgs.stdenv.hostPlatform.isLinux {
   hyprland-sourceFirst-false-config = ./sourceFirst-false-config.nix;
   hyprland-inconsistent-config = ./inconsistent-config.nix;
   hyprland-submaps-config = ./submaps-config.nix;
+  hyprland-submaps-on-dispatch = ./submaps-on-dispatch.nix;
 }

tests/modules/services/hyprland/inconsistent-config.nix

@@ -9,7 +9,7 @@
   };
 
   test.asserts.warnings.expected = [
-    "You have enabled hyprland.systemd.enable or listed plugins in hyprland.plugins but do not have any configuration in hyprland.settings or hyprland.extraConfig. This is almost certainly a mistake."
+    "You have enabled hyprland.systemd.enable or listed plugins in hyprland.plugins but do not have any configuration in hyprland.settings, hyprland.extraConfig or hyprland.submaps. This is almost certainly a mistake."
   ];
   test.asserts.warnings.enable = true;
 

tests/modules/services/hyprland/submaps-on-dispatch.nix

@@ -0,0 +1,31 @@
+{ config, ... }:
+
+{
+  wayland.windowManager.hyprland = {
+    enable = true;
+    submaps = {
+      resize = {
+        onDispatch = "reset";
+        settings = {
+          binde = [
+            ", right, resizeactive, 10 0"
+            ", left, resizeactive, -10 0"
+          ];
+        };
+      };
+      other = {
+        onDispatch = "resize";
+        settings = {
+          bind = [ ", a, exec, true" ];
+        };
+      };
+    };
+  };
+
+  nmt.script = ''
+    config=home-files/.config/hypr/hyprland.conf
+    assertFileExists "$config"
+    assertFileContains "$config" "submap = resize, reset"
+    assertFileContains "$config" "submap = other, resize"
+  '';
+}