src/share/classes/sun/awt/SunToolkit.java

@@ -40,10 +40,12 @@
 import java.util.*;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.Condition;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
+
+import sun.security.util.SecurityConstants;
 import sun.util.logging.PlatformLogger;
 import sun.misc.SoftCache;
 import sun.font.FontDesignMetrics;
 import sun.awt.im.InputContext;
 import sun.awt.image.*;

@@ -1134,10 +1136,30 @@
     public boolean isPrintableCharacterModifiersMask(int mods) {
         return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
     }
 
     /**
+     * Returns whether popup is allowed to be shown above the task bar.
+     * This is a default implementation of this method, which checks
+     * corresponding security permission.
+     */
+    public boolean canPopupOverlapTaskBar() {
+        boolean result = true;
+        try {
+            SecurityManager sm = System.getSecurityManager();
+            if (sm != null) {
+                sm.checkPermission(
+                        SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
+            }
+        } catch (SecurityException se) {
+            // There is no permission to show popups over the task bar
+            result = false;
+        }
+        return result;
+    }
+
+    /**
      * Returns a new input method window, with behavior as specified in
      * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
      * If the inputContext is not null, the window should return it from its
      * getInputContext() method. The window needs to implement
      * sun.awt.im.InputMethodWindow.