Ensure subtypes of SVGIcon return the correct icon type when being derived.

property-loader/src/main/java/com/github/weisj/darklaf/icons/CustomThemedIcon.java

@@ -45,6 +45,16 @@ public class CustomThemedIcon extends ThemedSVGIcon {
         }
     }
 
+    protected CustomThemedIcon(final int width, final int height, final CustomThemedIcon icon) {
+        super(width, height, icon);
+        this.defaults = icon.defaults;
+    }
+
+    @Override
+    public CustomThemedIcon derive(final int width, final int height) {
+        return new CustomThemedIcon(width, height, this);
+    }
+
     @Override
     protected SVGIcon createSVGIcon() {
         SVGIcon icon = new SVGIcon();

property-loader/src/main/java/com/github/weisj/darklaf/icons/DarkSVGIcon.java

@@ -56,7 +56,7 @@ public class DarkSVGIcon implements DerivableIcon<DarkSVGIcon>, RotateIcon, Seri
 
     private final Dimension size;
     private final SVGIcon icon;
-    protected final URI uri;
+    private final URI uri;
     private final AtomicBoolean loaded;
 
     private boolean loadedWithExtraScale;
@@ -80,7 +80,7 @@ public class DarkSVGIcon implements DerivableIcon<DarkSVGIcon>, RotateIcon, Seri
         loaded = new AtomicBoolean(false);
     }
 
-    private DarkSVGIcon(final int width, final int height, final DarkSVGIcon icon) {
+    protected DarkSVGIcon(final int width, final int height, final DarkSVGIcon icon) {
         this.size = new Dimension(width, height);
         this.icon = icon.icon;
         this.uri = icon.uri;
@@ -148,7 +148,7 @@ public class DarkSVGIcon implements DerivableIcon<DarkSVGIcon>, RotateIcon, Seri
         }
     }
 
-    private String getName() {
+    protected String getName() {
         String name = uri.toASCIIString();
         name = name.substring(Math.min(name.length() - 1, name.lastIndexOf('/') + 1));
         return name;

property-loader/src/main/java/com/github/weisj/darklaf/icons/ThemedSVGIcon.java

@@ -39,6 +39,17 @@ public class ThemedSVGIcon extends DarkSVGIcon implements ThemedIcon {
         currentTheme = new Object();
     }
 
+    protected ThemedSVGIcon(final int width, final int height, final ThemedSVGIcon icon) {
+        super(width, height, icon);
+        this.currentTheme = icon.currentTheme;
+        this.updatedNotDuringPaint = icon.updatedNotDuringPaint;
+    }
+
+    @Override
+    public ThemedSVGIcon derive(final int width, final int height) {
+        return new ThemedSVGIcon(width, height, this);
+    }
+
     @Override
     protected boolean ensureLoaded(final boolean painting) {
         /*