JBR-1802 com/sun/java/accessibility/util/8051626/Bug8051626.java: access denied ("java.lang.RuntimePermission" "getClassLoader")

(cherry picked from commit eae772aca9)

src/java.desktop/macosx/classes/sun/lwawt/macosx/CInputMethod.java

@@ -877,46 +877,21 @@ public class CInputMethod extends InputMethodAdapter {
             return false;
         }
 
-        static void await(CountDownLatch latch) {
-            try {
-                latch.await();
-            } catch (InterruptedException e) {
-                e.printStackTrace();
-            }
-        }
-
         // Executed on AppKit
         static void invoke(Runnable runnable, sun.awt.im.InputContext inputContext, Component targetToAppContext) throws InvocationTargetException {
-            CountDownLatch edtLatch = new CountDownLatch(1);
-            CountDownLatch tkLatch = new CountDownLatch(1);
             AtomicBoolean runOnAppKit = new AtomicBoolean(false);
 
-            // Emulate EventQueue.invokeAndWait(runnable) for the runnable that delegates execution
-            // back to AppKit (JavaFX Event thread), without running secondary loop on AppKit.
-
-            InvocationEvent event = new InvocationEvent(targetToAppContext, () -> {
-                try {
-                    runOnAppKit.set(instanceofJFXPanel(getClientComponent(inputContext)));
-                    if (!runOnAppKit.get()) {
-                        runnable.run();
-                    }
-                } finally {
-                    edtLatch.countDown();
-                    await(tkLatch);
-                }
-            });
-            assert targetToAppContext != null;
-            AppContext appContext = SunToolkit.targetToAppContext(targetToAppContext);
-            SunToolkit.postEvent(appContext, event);
-            SunToolkit.flushPendingEvents(appContext);
-
-            await(edtLatch);
-            try {
-                if (runOnAppKit.get()) {
+            // 1) Do not run secondary msg loop in this case.
+            // 2) Delegate runnable back to FX when applicable.
+            LWCToolkit.invokeAndWait(() -> {
+                runOnAppKit.set(instanceofJFXPanel(getClientComponent(inputContext)));
+                if (!runOnAppKit.get()) {
                     runnable.run();
                 }
-            } finally {
-                tkLatch.countDown();
+            }, targetToAppContext);
+
+            if (runOnAppKit.get()) {
+                runnable.run();
             }
         }
     }

src/java.desktop/macosx/classes/sun/lwawt/macosx/LWCToolkit.java

@@ -480,7 +480,9 @@ public final class LWCToolkit extends LWToolkit {
 
     @Override
     public Insets getScreenInsets(final GraphicsConfiguration gc) {
-        return ((CGraphicsConfig) gc).getDevice().getScreenInsets();
+        CGraphicsDevice gd = ((CGraphicsConfig) gc).getDevice();
+        // Avoid deadlock with input methods
+        return LWCToolkit.SelectorPerformer.perform(gd::getScreenInsets);
     }
 
     @Override
@@ -748,19 +750,21 @@ public final class LWCToolkit extends LWToolkit {
             assert EventQueue.isDispatchThread();
             if (executor == null) {
                 // init on EDT
-                executor = new ThreadPoolExecutor(1, Integer.MAX_VALUE,
-                        60L, TimeUnit.SECONDS,
-                        new SynchronousQueue<>(),
-                        new ThreadFactory() {
-                            private ThreadFactory factory = Executors.privilegedThreadFactory();
-                            @Override
-                            public Thread newThread(Runnable r) {
-                                Thread t = factory.newThread(r);
-                                t.setDaemon(true);
-                                t.setName("AWT-SelectorPerformer " + t.getName());
-                                return t;
-                            }
-                        });
+                AccessController.doPrivileged((PrivilegedAction<?>)() ->
+                    executor = new ThreadPoolExecutor(1, Integer.MAX_VALUE,
+                            60L, TimeUnit.SECONDS,
+                            new SynchronousQueue<>(),
+                            new ThreadFactory() {
+                                private ThreadFactory factory = Executors.privilegedThreadFactory();
+                                @Override
+                                public Thread newThread(Runnable r) {
+                                    Thread t = factory.newThread(r);
+                                    t.setDaemon(true);
+                                    t.setName("AWT-SelectorPerformer " + t.getName());
+                                    return t;
+                                }
+                            })
+                );
             }
             LinkedBlockingQueue<InvocationEvent> currentQueue;
             synchronized (invocations) {

src/java.desktop/windows/native/libawt/windows/awt_Frame.cpp

@@ -30,6 +30,7 @@
 #include "awt_IconCursor.h"
 #include "awt_Win32GraphicsDevice.h"
 #include "ComCtl32Util.h"
+#include "shellapi.h"
 
 #include <windowsx.h>
 #include <uxtheme.h>
@@ -780,6 +781,24 @@ AwtFrame::Show()
         } else {
             ::ShowWindow(hwnd, SW_SHOWMAXIMIZED);
         }
+
+        // [tav] Workaround for unclear platform behaviour.
+        // When a custom decor frame is being shown maximized at the moment
+        // some another AWT window is still foreground - the frame can go
+        // in background when shown if:
+        // 1) the other AWT window is closed the moment after frame's show
+        // 2) some another maximized window is behind the frame, it steals activation
+        if (HasCustomDecoration()) {
+            HWND fgHWnd = ::GetForegroundWindow();
+            if (fgHWnd != NULL &&
+                GetComponent(fgHWnd) != NULL && // it's awt window
+                IsFocusableWindow() &&
+                IsAutoRequestFocus() &&
+                !::IsWindow(GetModalBlocker(GetHWnd())))
+            {
+                ::SetForegroundWindow(GetHWnd());
+            }
+        }
     }
     else if (m_isInputMethodWindow) {
         // Don't activate input methow window
@@ -1824,7 +1843,15 @@ MsgRouting AwtFrame::WmNcCalcSize(BOOL wParam, LPNCCALCSIZE_PARAMS lpncsp, LRESU
         // [moklev] Workaround for RIDER-27069, IDEA-211327
         if (!this->IsUndecorated()) {
             rect->right += this->ScaleUpX(1);
-            rect->bottom -= 1;
+            // [tav] Decrement NC bottom only when taskbar is bottom/autohide (JBR-1786)
+            APPBARDATA abData;
+            abData.cbSize = sizeof(abData);
+            if (::SHAppBarMessage(ABM_GETTASKBARPOS, &abData) &&
+                abData.uEdge == ABE_BOTTOM &&
+                ::SHAppBarMessage(ABM_GETSTATE, &abData) == ABS_AUTOHIDE)
+            {
+                rect->bottom -= 1;
+            }
         }
     }
     else {