fix: persist custom jog key mappings across restart

ugs-platform/ugs-platform-ugslib/src/main/java/com/willwinder/ugs/nbp/lib/services/ActionRegistrationService.java

@@ -118,7 +118,8 @@ public void registerAction(String id, String name, String category, String short
         in.refresh();
 
         FileObject obj = in.getFileObject(id, "instance");
-        if (obj == null) {
+        boolean isNewAction = obj == null;
+        if (isNewAction) {
             obj = in.createData(id, "instance");
         }
         action.putValue(Action.NAME, name);
@@ -143,7 +144,7 @@ public void registerAction(String id, String name, String category, String short
         /////////////////////////
         // Add/Update Shortcut //
         /////////////////////////
-        if (shortcut != null && shortcut.length() > 0) {
+        if (isNewAction && shortcut != null && shortcut.length() > 0) {
             createShortcut(id, category, shortcut);
         }
 

ugs-platform/ugs-platform-ugslib/src/test/java/com/willwinder/ugs/nbp/lib/services/ActionRegistrationServiceTest.java

@@ -0,0 +1,142 @@
+/*
+    Copyright 2026 Will Winder
+
+    This file is part of Universal Gcode Sender (UGS).
+
+    UGS is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    UGS is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UGS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.willwinder.ugs.nbp.lib.services;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.openide.filesystems.FileObject;
+import org.openide.filesystems.FileUtil;
+
+import javax.swing.AbstractAction;
+import javax.swing.Action;
+import java.awt.event.ActionEvent;
+import java.io.IOException;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+public class ActionRegistrationServiceTest {
+    private static final String CATEGORY = "TestActionRegistrationService";
+    private static final String MENU_PATH = "Menu/TestActionRegistrationService";
+    private static final String LOCAL_MENU_PATH = "Menu/Test Action Registration Service";
+    private static final String SHORTCUT = "D-RIGHT";
+    private static final String OTHER_SHORTCUT = "D-LEFT";
+    private static final String NO_SHORTCUT = "D-UP";
+
+    private ActionRegistrationService service;
+
+    @Before
+    public void setUp() throws IOException {
+        cleanUp();
+        service = new ActionRegistrationService();
+    }
+
+    @After
+    public void tearDown() throws IOException {
+        cleanUp();
+    }
+
+    @Test
+    public void registerActionCreatesActionAndShortcutForNewAction() throws IOException {
+        registerAction("test-new-action", SHORTCUT);
+
+        assertNotNull(getAction("test-new-action"));
+        assertNotNull(getShortcut(SHORTCUT));
+    }
+
+    @Test
+    public void registerActionDoesNotRecreateRemovedShortcutForExistingAction() throws IOException {
+        registerAction("test-existing-action", SHORTCUT);
+        getShortcut(SHORTCUT).delete();
+
+        registerAction("test-existing-action", SHORTCUT);
+
+        assertNotNull(getAction("test-existing-action"));
+        assertNotNull(getMenuItem("test-existing-action"));
+        assertNull(getShortcut(SHORTCUT));
+    }
+
+    @Test
+    public void registerActionWithoutShortcutDoesNotCreateShortcut() throws IOException {
+        registerAction("test-null-shortcut", null);
+        registerAction("test-empty-shortcut", "");
+
+        assertNotNull(getAction("test-null-shortcut"));
+        assertNotNull(getAction("test-empty-shortcut"));
+        assertNull(getShortcut(NO_SHORTCUT));
+    }
+
+    @Test
+    public void registerNewActionStillCreatesShortcutAfterAnotherShortcutWasRemoved() throws IOException {
+        registerAction("test-existing-action", SHORTCUT);
+        getShortcut(SHORTCUT).delete();
+
+        registerAction("test-other-action", OTHER_SHORTCUT);
+
+        assertNull(getShortcut(SHORTCUT));
+        assertNotNull(getAction("test-other-action"));
+        assertNotNull(getShortcut(OTHER_SHORTCUT));
+    }
+
+    private void registerAction(String id, String shortcut) throws IOException {
+        service.registerAction(id, id, CATEGORY, shortcut, MENU_PATH, 100, LOCAL_MENU_PATH, createAction());
+    }
+
+    private Action createAction() {
+        return new AbstractAction() {
+            @Override
+            public void actionPerformed(ActionEvent event) {
+                // Not used by these registration tests.
+            }
+        };
+    }
+
+    private FileObject getAction(String id) {
+        return FileUtil.getConfigFile("Actions/" + CATEGORY + "/" + id + ".instance");
+    }
+
+    private FileObject getMenuItem(String id) {
+        return FileUtil.getConfigFile(MENU_PATH + "/" + id + ".shadow");
+    }
+
+    private FileObject getShortcut(String shortcut) {
+        FileObject keymaps = FileUtil.getConfigFile("Keymaps");
+        String currentKeymap = "NetBeans";
+        if (keymaps != null && keymaps.getAttribute("currentKeymap") != null) {
+            currentKeymap = keymaps.getAttribute("currentKeymap").toString();
+        }
+
+        return FileUtil.getConfigFile("Keymaps/" + currentKeymap + "/" + shortcut + ".shadow");
+    }
+
+    private void cleanUp() throws IOException {
+        deleteIfExists(FileUtil.getConfigFile("Actions/" + CATEGORY));
+        deleteIfExists(FileUtil.getConfigFile(MENU_PATH));
+        deleteIfExists(getShortcut(SHORTCUT));
+        deleteIfExists(getShortcut(OTHER_SHORTCUT));
+        deleteIfExists(getShortcut(NO_SHORTCUT));
+    }
+
+    private void deleteIfExists(FileObject fileObject) throws IOException {
+        if (fileObject != null) {
+            fileObject.delete();
+        }
+    }
+}