Add option to disable colored title bars on macOS. If disabled the titlebar will either be the native light or dark variant based on the theme.

macos/src/main/java/com/github/weisj/darklaf/platform/macos/ui/DecorationInformation.java

@@ -28,6 +28,7 @@ class DecorationInformation {
     protected final long windowHandle;
     protected final boolean fullWindowContentEnabled;
     protected final boolean transparentTitleBarEnabled;
+    protected final boolean useColoredTitleBar;
     protected final boolean jniInstalled;
     protected final JRootPane rootPane;
     protected final boolean titleVisible;
@@ -35,11 +36,13 @@ class DecorationInformation {
     protected final float titleFontSize;
 
     protected DecorationInformation(final long windowHandle, final boolean fullWindowContentEnabled,
-            final boolean transparentTitleBarEnabled, final boolean jniInstalled, final JRootPane rootPane,
+            final boolean transparentTitleBarEnabled, final boolean useColoredTitleBar, final boolean jniInstalled,
+            final JRootPane rootPane,
             final boolean titleVisible, final int titleBarHeight, final float titleFontSize) {
         this.windowHandle = windowHandle;
         this.fullWindowContentEnabled = fullWindowContentEnabled;
         this.transparentTitleBarEnabled = transparentTitleBarEnabled;
+        this.useColoredTitleBar = useColoredTitleBar;
         this.jniInstalled = jniInstalled;
         this.rootPane = rootPane;
         this.titleVisible = titleVisible;

macos/src/main/java/com/github/weisj/darklaf/platform/macos/ui/MacOSDecorationsUtil.java

@@ -34,12 +34,13 @@ public class MacOSDecorationsUtil {
     private static final String FULL_WINDOW_CONTENT_KEY = "apple.awt.fullWindowContent";
     private static final String TRANSPARENT_TITLE_BAR_KEY = "apple.awt.transparentTitleBar";
 
-    protected static DecorationInformation installDecorations(final JRootPane rootPane) {
+    protected static DecorationInformation installDecorations(final JRootPane rootPane,
+            final boolean useColoredTitleBar) {
         if (rootPane == null) return null;
         Window window = SwingUtilities.getWindowAncestor(rootPane);
         long windowHandle = JNIDecorationsMacOS.getComponentPointer(window);
         if (windowHandle == 0) {
-            return new DecorationInformation(0, false, false, false, rootPane, false, 0, 0);
+            return new DecorationInformation(0, false, false, false, false, rootPane, false, 0, 0);
         }
         JNIDecorationsMacOS.retainWindow(windowHandle);
         boolean fullWindowContent = isFullWindowContentEnabled(rootPane);
@@ -48,29 +49,41 @@ public class MacOSDecorationsUtil {
         int titleBarHeight = (int) JNIDecorationsMacOS.getTitleBarHeight(windowHandle);
 
         boolean jniInstall = !SystemInfo.isJavaVersionAtLeast("12");
-        if (!jniInstall) {
+
-            setTransparentTitleBarEnabled(rootPane, true);
+        if (useColoredTitleBar) {
-            setFullWindowContentEnabled(rootPane, true);
+            enableFullSizeContent(rootPane, windowHandle, jniInstall);
-        } else {
-            JNIDecorationsMacOS.installDecorations(windowHandle);
         }
+
         boolean titleVisible = SystemInfo.isMacOSMojave;
         JNIDecorationsMacOS.setTitleEnabled(windowHandle, titleVisible);
         if (titleVisible) {
             boolean isDarkTheme = UIManager.getBoolean("Theme.dark");
             JNIDecorationsMacOS.setDarkTheme(windowHandle, isDarkTheme);
         }
-        return new DecorationInformation(windowHandle, fullWindowContent, transparentTitleBar, jniInstall, rootPane,
+        return new DecorationInformation(windowHandle, fullWindowContent, transparentTitleBar, useColoredTitleBar,
+                jniInstall, rootPane,
                 titleVisible, titleBarHeight, titleFontSize);
     }
 
+    private static void enableFullSizeContent(final JRootPane rootPane, final long windowHandle,
+            final boolean jniInstall) {
+        if (!jniInstall) {
+            setTransparentTitleBarEnabled(rootPane, true);
+            setFullWindowContentEnabled(rootPane, true);
+        } else {
+            JNIDecorationsMacOS.installDecorations(windowHandle);
+        }
+    }
+
     protected static void uninstallDecorations(final DecorationInformation information) {
         if (information == null || information.windowHandle == 0) return;
-        if (information.jniInstalled) {
+        if (information.useColoredTitleBar) {
-            JNIDecorationsMacOS.uninstallDecorations(information.windowHandle);
+            if (information.jniInstalled) {
-        } else {
+                JNIDecorationsMacOS.uninstallDecorations(information.windowHandle);
-            setFullWindowContentEnabled(information.rootPane, information.fullWindowContentEnabled);
+            } else {
-            setTransparentTitleBarEnabled(information.rootPane, information.transparentTitleBarEnabled);
+                setFullWindowContentEnabled(information.rootPane, information.fullWindowContentEnabled);
+                setTransparentTitleBarEnabled(information.rootPane, information.transparentTitleBarEnabled);
+            }
         }
         JNIDecorationsMacOS.setTitleEnabled(information.windowHandle, true);
         JNIDecorationsMacOS.releaseWindow(information.windowHandle);

macos/src/main/java/com/github/weisj/darklaf/platform/macos/ui/MacOSTitlePane.java

@@ -39,6 +39,7 @@ public class MacOSTitlePane extends CustomTitlePane {
 
     private final JRootPane rootPane;
     private final Window window;
+    private final boolean useColoredTitleBar;
     private WindowListener windowListener;
     private Color inactiveBackground;
     private Color activeBackground;
@@ -55,6 +56,7 @@ public class MacOSTitlePane extends CustomTitlePane {
     public MacOSTitlePane(final JRootPane rootPane, final Window window) {
         this.rootPane = rootPane;
         this.window = window;
+        this.useColoredTitleBar = UIManager.getBoolean("macos.coloredTitleBar");
         determineColors();
         updateTitleBarVisibility();
     }
@@ -118,7 +120,7 @@ public class MacOSTitlePane extends CustomTitlePane {
     public void install() {
         determineColors();
         JRootPane rootPane = getRootPane();
-        decorationInformation = MacOSDecorationsUtil.installDecorations(rootPane);
+        decorationInformation = MacOSDecorationsUtil.installDecorations(rootPane, useColoredTitleBar);
         installListeners();
         if (!decorationInformation.titleVisible) {
             titleLabel = new JLabel();
@@ -210,6 +212,7 @@ public class MacOSTitlePane extends CustomTitlePane {
     }
 
     private boolean hideTitleBar() {
+        if (!useColoredTitleBar) return true;
         if (titleBarHidden) return true;
         return (decorationInformation.windowHandle == 0)
                 || JNIDecorationsMacOS.isFullscreen(decorationInformation.windowHandle)