Everywhere: Remove usage of internal API UIAction.

core/src/main/java/com/github/weisj/darklaf/ui/UIAction.java

@@ -0,0 +1,53 @@
+package com.github.weisj.darklaf.ui;
+
+import javax.swing.Action;
+import java.beans.PropertyChangeListener;
+
+public abstract class UIAction implements Action {
+    private final String name;
+
+    public UIAction(String name) {
+        this.name = name;
+    }
+
+    public final String getName() {
+        return name;
+    }
+
+    public Object getValue(String key) {
+        if (NAME.equals(key)) {
+            return name;
+        }
+        return null;
+    }
+
+    // UIAction is not mutable, this does nothing.
+    public void putValue(String key, Object value) {}
+
+    // UIAction is not mutable, this does nothing.
+    public void setEnabled(boolean b) {}
+
+    /**
+     * Cover method for <code>isEnabled(null)</code>.
+     */
+    public final boolean isEnabled() {
+        return accept(null);
+    }
+
+    /**
+     * Subclasses that need to conditionalize the enabled state should override this. Be aware that
+     * <code>sender</code> may be null.
+     *
+     * @param sender Widget enabled state is being asked for, may be null.
+     */
+    @Override
+    public boolean accept(Object sender) {
+        return true;
+    }
+
+    // UIAction is not mutable, this does nothing.
+    public void addPropertyChangeListener(PropertyChangeListener listener) {}
+
+    // UIAction is not mutable, this does nothing.
+    public void removePropertyChangeListener(PropertyChangeListener listener) {}
+}

core/src/main/java/com/github/weisj/darklaf/ui/list/DarkListUIBridge.java

@@ -37,7 +37,7 @@ import javax.swing.plaf.basic.BasicListUI;
 import javax.swing.text.Position;
 
 import sun.swing.DefaultLookup;
-import sun.swing.UIAction;
+import com.github.weisj.darklaf.ui.UIAction;
 
 import com.github.weisj.darklaf.ui.BasicTransferable;
 import com.github.weisj.darklaf.ui.DragRecognitionSupport;

core/src/main/java/com/github/weisj/darklaf/ui/menu/DarkMenuItemUIBase.java

@@ -29,7 +29,7 @@ import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicMenuItemUI;
 
 import sun.swing.MenuItemLayoutHelper;
-import sun.swing.UIAction;
+import com.github.weisj.darklaf.ui.UIAction;
 
 import com.github.weisj.darklaf.util.DarkUIUtil;
 import com.github.weisj.darklaf.util.LazyActionMap;

core/src/main/java/com/github/weisj/darklaf/ui/tabbedpane/DarkTabbedPaneUIBridge.java

@@ -40,7 +40,7 @@ import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.text.View;
 
 import sun.swing.DefaultLookup;
-import sun.swing.UIAction;
+import com.github.weisj.darklaf.ui.UIAction;
 
 import com.github.weisj.darklaf.util.DarkUIUtil;
 import com.github.weisj.darklaf.util.LazyActionMap;