module: Add shortcuts module

example/home.nix

@@ -6,6 +6,21 @@
     # A high-level setting:
     workspace.clickItemTo = "select";
 
+    # A mid-level setting:
+    shortcuts = {
+      ksmserver = {
+        "Lock Session" = [ "Screensaver" "Meta+Ctrl+Alt+L" ];
+      };
+
+      kwin = {
+        "Expose" = "Meta+,";
+        "Switch Window Down" = "Meta+J";
+        "Switch Window Left" = "Meta+H";
+        "Switch Window Right" = "Meta+L";
+        "Switch Window Up" = "Meta+K";
+      };
+    };
+
     # A low-level setting:
     files."baloofilerc"."Basic Settings"."Indexing-Enabled" = false;
   };

modules/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ./files.nix
+    ./shortcuts.nix
     ./windows.nix
     ./workspace.nix
   ];

modules/shortcuts.nix

@@ -0,0 +1,46 @@
+# Global keyboard shortcuts:
+{ config, lib, ... }:
+
+let
+  cfg = config.programs.plasma;
+
+  # Convert one shortcut into a settings attribute set.
+  shortcutToNameValuePair = action: skey:
+    let
+      # Keys are expected to be a list:
+      keys =
+        if builtins.isList skey
+        then (if builtins.length skey == 0 then [ "none" ] else skey)
+        else [ skey ];
+
+      # Don't allow un-escaped commas:
+      escape = lib.escape [ "," ];
+    in
+    {
+      name = action;
+      value = lib.concatStringsSep "," [
+        (lib.concatStringsSep "\t" (map escape keys))
+        "" # List of default keys, not needed.
+        "" # Display string, not needed.
+      ];
+    };
+
+  shortcutsToSettings = groups:
+    lib.mapAttrs (_group: lib.mapAttrs' shortcutToNameValuePair) groups;
+
+in
+{
+  options.programs.plasma.shortcuts = lib.mkOption {
+    type = with lib.types; attrsOf (attrsOf (oneOf [ (listOf str) str ]));
+    default = { };
+    description = ''
+      An attribute set where the keys are application groups and the
+      values are shortcuts.
+    '';
+  };
+
+  config = lib.mkIf cfg.enable {
+    programs.plasma.files."kglobalshortcutsrc" =
+      shortcutsToSettings cfg.shortcuts;
+  };
+}

script/rc2nix.rb

@@ -131,6 +131,9 @@ module Rc2Nix
       puts("{")
       puts("  programs.plasma = {")
       puts("    enable = true;")
+      puts("    shortcuts = {")
+      pp_shortcuts(settings["kglobalshortcutsrc"], 6)
+      puts("    };")
       puts("    files = {")
       pp_settings(settings, 6)
       puts("    };")
@@ -143,6 +146,8 @@ module Rc2Nix
       settings.keys.sort.each do |file|
         settings[file].keys.sort.each do |group|
           settings[file][group].keys.sort.each do |key|
+            next if file == "kglobalshortcutsrc" && key != "_k_friendly_name"
+
             print(" " * indent)
             print("\"#{file}\".")
             print("\"#{group}\".")
@@ -154,6 +159,35 @@ module Rc2Nix
       end
     end
 
+    ############################################################################
+    def pp_shortcuts(groups, indent)
+      groups&.keys.sort.each do |group|
+        groups[group].keys.sort.each do |action|
+          next if action == "_k_friendly_name"
+
+          print(" " * indent)
+          print("\"#{group}\".")
+          print("\"#{action}\" = ")
+
+          keys = groups[group][action].
+            split(/(?<!\\),/).first.
+            gsub(/\\?\\,/, ',').
+            gsub(/\\t/, "\t").
+            split(/\t/)
+
+          if keys.size > 1
+            print("[" + keys.map {|k| nix_val(k)}.join(" ") + "]")
+          elsif keys.first == "none"
+            print("[ ]")
+          else
+            print(nix_val(keys.first))
+          end
+
+          print(";\n")
+        end
+      end
+    end
+
     ############################################################################
     def nix_val(str)
       case str