FlatLaf: Enable Window decoration option for Linux

Author: demitriusbelai

platform/o.n.swing.laf.flatlaf/src/org/netbeans/swing/laf/flatlaf/FlatLFCustoms.java

@@ -19,15 +19,18 @@
 
 package org.netbeans.swing.laf.flatlaf;
 
+import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 import java.awt.Color;
 import java.awt.Font;
 import java.awt.Insets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.concurrent.Callable;
 import javax.swing.BorderFactory;
 import javax.swing.InputMap;
+import javax.swing.JFrame;
 import javax.swing.KeyStroke;
 import javax.swing.UIDefaults;
 import javax.swing.UIDefaults.LazyValue;
@@ -151,6 +154,10 @@ EDITOR_TOOLBAR_BORDER, new CompoundBorder(DPISafeBorder.matte(0, 0, 1, 0, editor
                 }
             }
         }
+        if (SystemInfo.isLinux) {
+            result.add("windowDefaultLookAndFeelDecorated");
+            result.add(FlatLafPrefs.isUseWindowDecorations());
+        }
         return result.toArray();
     }
 

platform/o.n.swing.laf.flatlaf/src/org/netbeans/swing/laf/flatlaf/FlatLafOptionsPanel.java

@@ -19,6 +19,7 @@
 package org.netbeans.swing.laf.flatlaf;
 
 import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.FlatLightLaf;
 import com.formdev.flatlaf.util.SystemInfo;
 import java.awt.Color;
 import java.io.BufferedWriter;
@@ -52,7 +53,8 @@
 public class FlatLafOptionsPanel extends javax.swing.JPanel {
 
     private static final Color DEFAULT = new Color(0, true);
-    private static final Color currentAccentColor = FlatLafPrefs.getAccentColor();
+    private static final Color currentAccentColor = getPrefsAccentColorOrDefault();
+    private static final boolean currentUseWindowDecorations = FlatLafPrefs.isUseWindowDecorations();
 
     private static final RequestProcessor RP = new RequestProcessor(FlatLafOptionsPanel.class);
 
@@ -108,7 +110,7 @@ private void initAccentColor() {
     }
 
     private void updateEnabled() {
-        boolean supportsWindowDecorations = FlatLaf.supportsNativeWindowDecorations();
+        boolean supportsWindowDecorations = FlatLaf.supportsNativeWindowDecorations() || new FlatLightLaf().getSupportsWindowDecorations();
         useWindowDecorationsCheckBox.setEnabled(supportsWindowDecorations);
         unifiedTitleBarCheckBox.setEnabled(supportsWindowDecorations && useWindowDecorationsCheckBox.isSelected());
         menuBarEmbeddedCheckBox.setEnabled(supportsWindowDecorations && useWindowDecorationsCheckBox.isSelected());
@@ -341,7 +343,8 @@ protected boolean store() {
         FlatLafPrefs.setUnderlineMenuSelection(underlineMenuSelectionCheckBox.isSelected());
         FlatLafPrefs.setAlwaysShowMnemonics(alwaysShowMnemonicsCheckBox.isSelected());
 
-        if (!Objects.equals(accentColor, currentAccentColor)) {
+        if (!Objects.equals(accentColor, currentAccentColor)
+                || SystemInfo.isLinux && useWindowDecorationsCheckBox.isSelected() != currentUseWindowDecorations) {
             askForRestart();
         }
         return false;
@@ -368,7 +371,7 @@ private void askForRestart() {
                 NotificationDisplayer.Priority.NORMAL, NotificationDisplayer.Category.INFO);
     }
 
-    private Color getPrefsAccentColorOrDefault() {
+    private static Color getPrefsAccentColorOrDefault() {
         Color accentColor = FlatLafPrefs.getAccentColor();
         return accentColor != null ? accentColor : DEFAULT;
     }

platform/o.n.swing.laf.flatlaf/src/org/netbeans/swing/laf/flatlaf/FlatLafPrefs.java

@@ -18,6 +18,7 @@
  */
 package org.netbeans.swing.laf.flatlaf;
 
+import com.formdev.flatlaf.util.SystemInfo;
 import java.awt.Color;
 import java.util.prefs.Preferences;
 import org.openide.util.NbPreferences;
@@ -37,6 +38,8 @@ class FlatLafPrefs {
 
     private static final Preferences prefs = NbPreferences.forModule(FlatLafPrefs.class);
 
+    private static final boolean DEF_USE_WINDOW_DECORATIONS = SystemInfo.isWindows_10_orLater;
+
     static Color getAccentColor() {
         return parseColor(prefs.get(ACCENT_COLOR, null));
     }
@@ -60,11 +63,11 @@ static void setAccentColor(Color accentColor) {
     }
 
     static boolean isUseWindowDecorations() {
-        return prefs.getBoolean(USE_WINDOW_DECORATIONS, true);
+        return prefs.getBoolean(USE_WINDOW_DECORATIONS, DEF_USE_WINDOW_DECORATIONS);
     }
 
     static void setUseWindowDecorations(boolean value) {
-        putBoolean(USE_WINDOW_DECORATIONS, value, true);
+        putBoolean(USE_WINDOW_DECORATIONS, value, DEF_USE_WINDOW_DECORATIONS);
     }
 
     static boolean isUnifiedTitleBar() {

platform/o.n.swing.plaf/src/org/netbeans/swing/plaf/Startup.java

@@ -334,6 +334,9 @@ private void installLFCustoms (LFCustoms customs) {
             defaults.putDefaults (customs.getLookAndFeelCustomizationKeysAndValues());
         }
 
+        if (defaults.getBoolean("windowDefaultLookAndFeelDecorated")) {
+            JFrame.setDefaultLookAndFeelDecorated(true);
+        }
     }
 
     private void runPostInstall() {