Add system property to disable beep sounds

Co-authored-by: laeubi <[email protected]>

Author: Copilot

bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/widgets/Display.java

@@ -116,6 +116,8 @@ enum APPEARANCE {
 	APPEARANCE appAppearance;
 	/* System property to be set for SWT application to use the system's theme */
 	static final String USE_SYSTEM_THEME = "org.eclipse.swt.display.useSystemTheme";
+	/* System property to control beep sounds */
+	static final String BEEP_ENABLED = "swt.beep";
 
 	/* Windows and Events */
 	Event [] eventQueue;
@@ -671,7 +673,9 @@ public void execute(Runnable runnable) {
  */
 public void beep () {
 	checkDevice ();
-	OS.NSBeep ();
+	if (!"off".equalsIgnoreCase(System.getProperty(BEEP_ENABLED))) {
+		OS.NSBeep ();
+	}
 }
 
 void cascadeWindow (NSWindow window, NSScreen screen) {

bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Display.java

@@ -509,6 +509,8 @@ public void stop() {
 
 	/* Package name */
 	static final String PACKAGE_PREFIX = "org.eclipse.swt.widgets."; //$NON-NLS-1$
+	/* System property to control beep sounds */
+	static final String BEEP_ENABLED = "swt.beep";
 	/* This code is intentionally commented.
 	 * ".class" can not be used on CLDC.
 	 */
@@ -988,7 +990,9 @@ public void execute(Runnable runnable) {
  */
 public void beep () {
 	if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
-	GDK.gdk_display_beep(GDK.gdk_display_get_default());
+	if (!"off".equalsIgnoreCase(System.getProperty(BEEP_ENABLED))) {
+		GDK.gdk_display_beep(GDK.gdk_display_get_default());
+	}
 }
 
 long cellDataProc (long tree_column, long cell, long tree_model, long iter, long data) {

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Display.java

@@ -224,6 +224,8 @@ public class Display extends Device implements Executor {
 	boolean useWsBorderTable = false;
 	static final String USE_WS_BORDER_TEXT_KEY       = "org.eclipse.swt.internal.win32.Text.use_WS_BORDER"; //$NON-NLS-1$
 	boolean useWsBorderText = false;
+	/* System property to control beep sounds */
+	static final String BEEP_ENABLED = "swt.beep";
 	/**
 	 * Changes the color of Table header's column delimiters.
 	 * Only affects custom-drawn header, that is when background/foreground header color is set.
@@ -852,7 +854,9 @@ public void execute(Runnable runnable) {
  */
 public void beep () {
 	checkDevice ();
-	OS.MessageBeep (OS.MB_OK);
+	if (!"off".equalsIgnoreCase(System.getProperty(BEEP_ENABLED))) {
+		OS.MessageBeep (OS.MB_OK);
+	}
 }
 
 /**

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_widgets_Display.java

@@ -231,6 +231,50 @@ public void test_beep() {
 	}
 }
 
+@Test
+public void test_beep_disabled() {
+	String originalValue = System.getProperty("swt.beep");
+	try {
+		System.setProperty("swt.beep", "off");
+		Display display = new Display();
+		try {
+			// Should not beep when property is "off"
+			display.beep();
+		} finally {
+			display.dispose();
+		}
+	} finally {
+		// Restore original value
+		if (originalValue != null) {
+			System.setProperty("swt.beep", originalValue);
+		} else {
+			System.clearProperty("swt.beep");
+		}
+	}
+}
+
+@Test
+public void test_beep_enabled() {
+	String originalValue = System.getProperty("swt.beep");
+	try {
+		System.setProperty("swt.beep", "on");
+		Display display = new Display();
+		try {
+			// Should beep when property is "on"
+			display.beep();
+		} finally {
+			display.dispose();
+		}
+	} finally {
+		// Restore original value
+		if (originalValue != null) {
+			System.setProperty("swt.beep", originalValue);
+		} else {
+			System.clearProperty("swt.beep");
+		}
+	}
+}
+
 @Test
 public void test_close() {
 	Display display = new Display();