1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.javafx.embed.swing;
  27 
  28 import com.sun.javafx.application.PlatformImpl;
  29 import com.sun.javafx.tk.Toolkit;
  30 import java.awt.EventQueue;
  31 import java.awt.SecondaryLoop;
  32 import java.security.AccessController;
  33 import java.security.PrivilegedAction;
  34 import java.util.concurrent.atomic.AtomicBoolean;
  35 import javafx.application.Platform;
  36 import jdk.swing.interop.DispatcherWrapper;
  37 
  38 public class SwingFXUtilsImpl {
  39 
  40     private static class FwSecondaryLoop implements SecondaryLoop {
  41 
  42         private final AtomicBoolean isRunning = new AtomicBoolean(false);
  43 
  44         @Override
  45         public boolean enter() {
  46             if (isRunning.compareAndSet(false, true)) {
  47                 PlatformImpl.runAndWait(() -> {
  48                     Toolkit.getToolkit().enterNestedEventLoop(FwSecondaryLoop.this);
  49                 });
  50                 return true;
  51             }
  52             return false;
  53         }
  54 
  55         @Override
  56         public boolean exit() {
  57             if (isRunning.compareAndSet(true, false)) {
  58                 PlatformImpl.runAndWait(() -> {
  59                     Toolkit.getToolkit().exitNestedEventLoop(FwSecondaryLoop.this, null);
  60                 });
  61                 return true;
  62             }
  63             return false;
  64         }
  65     }
  66 
  67     private static class FXDispatcher extends DispatcherWrapper {
  68 
  69         @Override
  70         public boolean isDispatchThread() {
  71             return Platform.isFxApplicationThread();
  72         }
  73 
  74         @Override
  75         public void scheduleDispatch(Runnable runnable) {
  76             Platform.runLater(runnable);
  77         }
  78 
  79         @Override
  80         public SecondaryLoop createSecondaryLoop() {
  81             return new FwSecondaryLoop();
  82         }
  83     }
  84 
  85     private static EventQueue getEventQueue() {
  86         return AccessController.doPrivileged(
  87                 (PrivilegedAction<EventQueue>) () -> java.awt.Toolkit.getDefaultToolkit().getSystemEventQueue());
  88     }
  89 
  90     //Called with reflection from PlatformImpl to avoid dependency
  91     public static void installFwEventQueue() {
  92         DispatcherWrapper.setFwDispatcher(getEventQueue(), new FXDispatcher());
  93     }
  94 
  95     //Called with reflection from PlatformImpl to avoid dependency
  96     public static void removeFwEventQueue() {
  97         DispatcherWrapper.setFwDispatcher(getEventQueue(), null);
  98     }
  99 }