JBR-2702 Tooltips display through other applications on hover

(cherry picked from commits 11732c2469, 0ed7deabaa)

src/java.desktop/macosx/native/libawt_lwawt/awt/AWTView.m

@@ -218,10 +218,19 @@ static BOOL shouldUsePressAndHold() {
     NSPoint localPoint = [self convertPoint: eventLocation fromView: nil];
 
     if  ([self mouse: localPoint inRect: [self bounds]]) {
-        [self deliverJavaMouseEvent: event];
-    } else {
-        [[self nextResponder] mouseDown:event];
+        NSWindow* eventWindow = [event window];
+        NSPoint screenPoint = (eventWindow == nil)
+            ? eventLocation
+            // SDK we build against is too old - it doesn't have convertPointToScreen
+            : [eventWindow convertRectToScreen:NSMakeRect(eventLocation.x, eventLocation.y, 0, 0)].origin;
+        // macOS can report mouseMoved events to a window even if it's not showing currently (see JBR-2702)
+        // so we're performing an additional check here
+        if (self.window.windowNumber == [NSWindow windowNumberAtPoint:screenPoint belowWindowWithWindowNumber:0]) {
+            [self deliverJavaMouseEvent: event];
+            return;
+        }
     }
+    [[self nextResponder] mouseMoved:event];
 }
 
 - (void) mouseDragged: (NSEvent *)event {

test/jdk/jb/java/awt/event/MouseEvent/MouseMoveEventFallThroughTest.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseMotionAdapter;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * @test
+ * @summary Regression test for JBR-2702 Tooltips display through other applications on hover
+ * @key headful
+ */
+
+public class MouseMoveEventFallThroughTest {
+    private static JFrame topFrame;
+    private static JFrame bottomFrame;
+    private static final AtomicBoolean bottomFrameReceivedMouseMoved = new AtomicBoolean();
+
+    public static void main(String[] args) throws Exception {
+        try {
+            SwingUtilities.invokeAndWait(() -> {
+                bottomFrame = new JFrame("Bottom frame");
+                bottomFrame.addMouseMotionListener(new MouseMotionAdapter() {
+                    @Override
+                    public void mouseMoved(MouseEvent e) {
+                        bottomFrameReceivedMouseMoved.set(true);
+                    }
+                });
+                bottomFrame.setSize(200, 100);
+                bottomFrame.setLocation(250, 250);
+                bottomFrame.setVisible(true);
+                topFrame = new JFrame("Top frame");
+                topFrame.setSize(300, 200);
+                topFrame.setLocation(200, 200);
+                topFrame.setVisible(true);
+            });
+            Robot robot = new Robot();
+            robot.delay(1000);
+            robot.mouseMove(350, 300); // position mouse cursor over both frames
+            robot.delay(1000);
+            SwingUtilities.invokeAndWait(() -> {
+                bottomFrame.setSize(210, 110);
+            });
+            robot.delay(1000);
+            robot.mouseMove(351, 301); // move mouse cursor a bit
+            robot.delay(1000);
+            if (bottomFrameReceivedMouseMoved.get()) {
+                throw new RuntimeException("Mouse moved event dispatched to invisible window");
+            }
+        } finally {
+            SwingUtilities.invokeAndWait(() -> {
+                if (topFrame != null) topFrame.dispose();
+                if (bottomFrame != null) bottomFrame.dispose();
+            });
+        }
+    }
+}