Button: Draw focus border for borderless variant

core/src/main/java/com/github/weisj/darklaf/ui/button/DarkButtonBorder.java

@@ -1,7 +1,7 @@
 /*
  * MIT License
  *
- * Copyright (c) 2019-2021 Jannis Weis
+ * Copyright (c) 2019-2022 Jannis Weis
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
  * associated documentation files (the "Software"), to deal in the Software without restriction,
@@ -32,7 +32,9 @@ import com.github.weisj.darklaf.ui.util.DarkUIUtil;
 import com.github.weisj.darklaf.util.AlignmentExt;
 import com.github.weisj.darklaf.util.PropertyUtil;
 import com.github.weisj.darklaf.util.graphics.GraphicsContext;
+import com.github.weisj.darklaf.util.graphics.GraphicsUtil;
 import com.github.weisj.swingdsl.visualpadding.VisualPaddingProvider;
+import org.jetbrains.annotations.NotNull;
 
 /** @author Jannis Weis */
 public class DarkButtonBorder implements Border, UIResource, VisualPaddingProvider {
@@ -148,7 +150,22 @@ public class DarkButtonBorder implements Border, UIResource, VisualPaddingProvid
 
     protected void paintBorderlessBorder(final Component c, final Graphics g, final int x, final int y, final int width,
             final int height) {
+        if (paintFocus(c)) {
+            AbstractButton b = (AbstractButton) c;
+            DarkButtonUI ui = DarkUIUtil.getUIOfType(b.getUI(), DarkButtonUI.class);
+            if (ui == null) return;
+            Insets margin = b.getMargin();
+            if (margin instanceof UIResource) {
+                margin = null;
+            }
+            Rectangle r = ui.backgroundContentRect(b, width, height, margin);
 
+            GraphicsContext context = GraphicsUtil.setupStrokePainting(g);
+            g.translate(x, y);
+            g.setColor(getBorderColor(c, true));
+            PaintUtil.paintLineBorder((Graphics2D) g, r.x, r.y, r.width, r.height, getArc(c));
+            context.restore();
+        }
     }
 
     protected void paintLineBorder(final Component c, final Graphics2D g2, final int arc, final boolean focus,
@@ -287,7 +304,7 @@ public class DarkButtonBorder implements Border, UIResource, VisualPaddingProvid
     }
 
     @Override
-    public Insets getVisualPaddings(final Component c) {
+    public @NotNull Insets getVisualPaddings(@NotNull final Component c) {
         return getBorderInsets(c);
     }
 }

core/src/main/java/com/github/weisj/darklaf/ui/button/DarkButtonUI.java

@@ -1,7 +1,7 @@
 /*
  * MIT License
  *
- * Copyright (c) 2019-2021 Jannis Weis
+ * Copyright (c) 2019-2022 Jannis Weis
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
  * associated documentation files (the "Software"), to deal in the Software without restriction,
@@ -290,9 +290,8 @@ public class DarkButtonUI extends BasicButtonUI implements ButtonConstants {
         return new Rectangle(bx, by, bw, bh);
     }
 
-    protected void paintBorderlessBackground(final AbstractButton b, final Graphics2D g, final int arc, final int width,
-            final int height, final Insets m) {
-        if (isRolloverBorderless(b)) {
+    protected Rectangle backgroundContentRect(final AbstractButton b, final int width, final int height,
+            final Insets m) {
         Border border = b.getBorder();
         Insets ins = border != null ? border.getBorderInsets(b) : new Insets(0, 0, 0, 0);
         Insets margin = m;
@@ -313,6 +312,18 @@ public class DarkButtonUI extends BasicButtonUI implements ButtonConstants {
         int y = Math.max(ins.top, margin.top);
         int w = width - x - Math.max(ins.right, margin.right);
         int h = height - y - Math.max(ins.bottom, margin.bottom);
+        return new Rectangle(x, y, w, h);
+    }
+
+    protected void paintBorderlessBackground(final AbstractButton b, final Graphics2D g, final int arc, final int width,
+            final int height, final Insets m) {
+        if (isRolloverBorderless(b) || isArmedBorderless(b)) {
+            Rectangle backgroundRect = backgroundContentRect(b, width, height, m);
+
+            int x = backgroundRect.x;
+            int y = backgroundRect.y;
+            int w = backgroundRect.width;
+            int h = backgroundRect.height;
 
             GraphicsUtil.setupStrokePainting(g);
             if (ButtonConstants.isBorderlessRectangular(b)) {

core/src/main/java/com/github/weisj/darklaf/ui/splitbutton/DarkSplitButtonBorder.java

@@ -1,7 +1,7 @@
 /*
  * MIT License
  *
- * Copyright (c) 2020-2021 Jannis Weis
+ * Copyright (c) 2020-2022 Jannis Weis
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
  * associated documentation files (the "Software"), to deal in the Software without restriction,
@@ -59,8 +59,7 @@ public class DarkSplitButtonBorder extends DarkButtonBorder {
 
         DarkSplitButtonUI ui = DarkUIUtil.getUIOfType(((JSplitButton) c).getUI(), DarkSplitButtonUI.class);
         if (ui != null && ui.getDrawOutline(c)) {
-            boolean armed = ui.isArmedBorderless(ui.splitButton)
-                    || (ui.useArrowButton() && ui.isArmedBorderless(ui.arrowButton));
+            boolean armed = ui.isArmedBorderless(ui.splitButton);
             g.setColor(ui.getBorderlessOutline(armed));
         } else {
             g.setColor(getBorderColor(c, false));
@@ -75,7 +74,8 @@ public class DarkSplitButtonBorder extends DarkButtonBorder {
         if (!borderless) return hasDefaultAction;
         if (hasDefaultAction && ButtonConstants.isBorderlessVariant(c)) {
             DarkSplitButtonUI ui = DarkUIUtil.getUIOfType(((JSplitButton) c).getUI(), DarkSplitButtonUI.class);
-            return ui != null && ui.isRolloverBorderless((AbstractButton) c);
+            return ui != null &&
+                    (ui.isRolloverBorderless((AbstractButton) c) || ui.isArmedBorderless((AbstractButton) c));
         }
         return false;
     }

core/src/main/java/com/github/weisj/darklaf/ui/splitbutton/DarkSplitButtonUI.java

@@ -1,7 +1,7 @@
 /*
  * MIT License
  *
- * Copyright (c) 2020-2021 Jannis Weis
+ * Copyright (c) 2020-2022 Jannis Weis
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
  * associated documentation files (the "Software"), to deal in the Software without restriction,
@@ -188,6 +188,11 @@ public class DarkSplitButtonUI extends DarkButtonUI {
         return super.isRolloverBorderless(b) || (useArrowButton() && arrowButton.getModel().isRollover());
     }
 
+    @Override
+    public boolean isArmedBorderless(final AbstractButton b) {
+        return super.isArmedBorderless(b) || (useArrowButton() && arrowButton.getModel().isArmed());
+    }
+
     @Override
     protected void paintDarklafBorderBgImpl(final AbstractButton c, final Graphics2D g, final boolean showShadow,
             final int shadow, final int effectiveArc, final Rectangle bgRect) {