Add module for KRunner

modules/default.nix

@@ -8,6 +8,7 @@
     ./fonts.nix
     ./hotkeys.nix
     ./input.nix
+    ./krunner.nix
     ./kscreenlocker.nix
     ./kwin.nix
     ./panels.nix

modules/krunner.nix

@@ -0,0 +1,43 @@
+{ config, lib, ... }:
+let cfg = config.programs.plasma;
+in with lib; {
+  options.programs.plasma.krunner = {
+    position = mkOption {
+      type = with types; nullOr (enum [ "Top" "Center" ]);
+      default = null;
+      example = "Center";
+      description = "Position of KRunner on screen.";
+    };
+    activateWhenTypingOnDesktop = mkOption {
+      type = with types; nullOr bool;
+      default = null;
+      description = "Activate KRunner when typing on the desktop.";
+    };
+    historyBehavior = mkOption {
+      type = with types;
+        nullOr (enum [ "Disabled" "EnableSuggestions" "EnableAutoComplete" ]);
+      default = null;
+      example = "Disabled";
+      description = "Behavior of KRunner’s history.";
+    };
+  };
+
+  config.programs.plasma.configFile."krunnerrc" = (mkMerge [
+    (mkIf (cfg.krunner.position != null) {
+      General.FreeFloating = cfg.krunner.position == "Center";
+    })
+    (mkIf (cfg.krunner.activateWhenTypingOnDesktop != null) {
+      General.ActivateWhenTypingOnDesktop =
+        cfg.krunner.activateWhenTypingOnDesktop;
+    })
+    (mkIf (cfg.krunner.historyBehavior != null) {
+      General.historyBehavior =
+        (if cfg.krunner.historyBehavior == "EnableSuggestions" then
+          "CompletionSuggestion"
+        else if cfg.krunner.historyBehavior == "EnableAutoComplete" then
+          "ImmediateCompletion"
+        else
+          cfg.krunner.historyBehavior);
+    })
+  ]);
+}