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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package com.sun.java.swing;

import sun.awt.EventQueueDelegate;
import sun.awt.AppContext;
import sun.awt.SunToolkit;

import java.util.Collections;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.concurrent.Callable;
import java.applet.Applet;
import java.awt.AWTEvent;
import java.awt.EventQueue;
import java.awt.Component;
import java.awt.Container;
import java.awt.Window;
import javax.swing.JComponent;
import javax.swing.RepaintManager;

A collection of utility methods for Swing.

WARNING: While this class is public, it should not be treated as
public API and its API may change in incompatable ways between dot dot
releases and even patch releases. You should not rely on this class even
existing.
This is a second part of sun.swing.SwingUtilities2. It is required
to provide services for JavaFX applets.
/**
 * A collection of utility methods for Swing.
 * <p>
 * <b>WARNING:</b> While this class is public, it should not be treated as
 * public API and its API may change in incompatable ways between dot dot
 * releases and even patch releases. You should not rely on this class even
 * existing.
 *
 * This is a second part of sun.swing.SwingUtilities2. It is required
 * to provide services for JavaFX applets.
 *
 */
public class SwingUtilities3 {
    
The clientProperty key for delegate RepaintManager /**
     * The {@code clientProperty} key for delegate {@code RepaintManager}
     */
    private static final Object DELEGATE_REPAINT_MANAGER_KEY =
        new StringBuilder("DelegateRepaintManagerKey");

    
Registers delegate RepaintManager for JComponent. /**
      * Registers delegate RepaintManager for {@code JComponent}.
      */
    public static void setDelegateRepaintManager(JComponent component,
                                                RepaintManager repaintManager) {
        /* setting up flag in AppContext to speed up lookups in case
         * there are no delegate RepaintManagers used.
         */
        AppContext.getAppContext().put(DELEGATE_REPAINT_MANAGER_KEY,
                                       Boolean.TRUE);

        component.putClientProperty(DELEGATE_REPAINT_MANAGER_KEY,
                                    repaintManager);
    }

    private static final Map<Container, Boolean> vsyncedMap =
        Collections.synchronizedMap(new WeakHashMap<Container, Boolean>());

    
Sets vsyncRequested state for the rootContainer. If isRequested is true then vsynced BufferStrategy is enabled for this rootContainer. Note: requesting vsynced painting does not guarantee one. The outcome depends on current RepaintManager's RepaintManager.PaintManager and on the capabilities of the graphics hardware/software and what not. 
Params:
rootContainer – topmost container. Should be either Window or Applet
isRequested – the value to set vsyncRequested state to/**
     * Sets vsyncRequested state for the {@code rootContainer}.  If
     * {@code isRequested} is {@code true} then vsynced
     * {@code BufferStrategy} is enabled for this {@code rootContainer}.
     *
     * Note: requesting vsynced painting does not guarantee one. The outcome
     * depends on current RepaintManager's RepaintManager.PaintManager
     * and on the capabilities of the graphics hardware/software and what not.
     *
     * @param rootContainer topmost container. Should be either {@code Window}
     *  or {@code Applet}
     * @param isRequested the value to set vsyncRequested state to
     */
    public static void setVsyncRequested(Container rootContainer,
                                         boolean isRequested) {
        assert (rootContainer instanceof Applet) || (rootContainer instanceof Window);
        if (isRequested) {
            vsyncedMap.put(rootContainer, Boolean.TRUE);
        } else {
            vsyncedMap.remove(rootContainer);
        }
    }

    
Checks if vsync painting is requested for rootContainer 
Params:
rootContainer – topmost container. Should be either Window or Applet
Returns:
true if vsync painting is requested for rootContainer/**
     * Checks if vsync painting is requested for {@code rootContainer}
     *
     * @param rootContainer topmost container. Should be either Window or Applet
     * @return {@code true} if vsync painting is requested for {@code rootContainer}
     */
    public static boolean isVsyncRequested(Container rootContainer) {
        assert (rootContainer instanceof Applet) || (rootContainer instanceof Window);
        return Boolean.TRUE == vsyncedMap.get(rootContainer);
    }

    
Returns delegate RepaintManager for component hierarchy. /**
     * Returns delegate {@code RepaintManager} for {@code component} hierarchy.
     */
    public static RepaintManager getDelegateRepaintManager(Component
                                                            component) {
        RepaintManager delegate = null;
        if (Boolean.TRUE == SunToolkit.targetToAppContext(component)
                                      .get(DELEGATE_REPAINT_MANAGER_KEY)) {
            while (delegate == null && component != null) {
                while (component != null
                         && ! (component instanceof JComponent)) {
                    component = component.getParent();
                }
                if (component != null) {
                    delegate = (RepaintManager)
                        ((JComponent) component)
                          .getClientProperty(DELEGATE_REPAINT_MANAGER_KEY);
                    component = component.getParent();
                }

            }
        }
        return delegate;
    }

    /*
     * We use maps to avoid reflection. Hopefully it should perform better
     * this way.
     */
    public static void setEventQueueDelegate(
            Map<String, Map<String, Object>> map) {
        EventQueueDelegate.setDelegate(new EventQueueDelegateFromMap(map));
    }

    private static class EventQueueDelegateFromMap
    implements EventQueueDelegate.Delegate {
        private final AWTEvent[] afterDispatchEventArgument;
        private final Object[] afterDispatchHandleArgument;
        private final Callable<Void> afterDispatchCallable;

        private final AWTEvent[] beforeDispatchEventArgument;
        private final Callable<Object> beforeDispatchCallable;

        private final EventQueue[] getNextEventEventQueueArgument;
        private final Callable<AWTEvent> getNextEventCallable;

        @SuppressWarnings("unchecked")
        public EventQueueDelegateFromMap(Map<String, Map<String, Object>> objectMap) {
            Map<String, Object> methodMap = objectMap.get("afterDispatch");
            afterDispatchEventArgument = (AWTEvent[]) methodMap.get("event");
            afterDispatchHandleArgument = (Object[]) methodMap.get("handle");
            afterDispatchCallable = (Callable<Void>) methodMap.get("method");

            methodMap = objectMap.get("beforeDispatch");
            beforeDispatchEventArgument = (AWTEvent[]) methodMap.get("event");
            beforeDispatchCallable = (Callable<Object>) methodMap.get("method");

            methodMap = objectMap.get("getNextEvent");
            getNextEventEventQueueArgument =
                (EventQueue[]) methodMap.get("eventQueue");
            getNextEventCallable = (Callable<AWTEvent>) methodMap.get("method");
        }

        @Override
        public void afterDispatch(AWTEvent event, Object handle) throws InterruptedException {
            afterDispatchEventArgument[0] = event;
            afterDispatchHandleArgument[0] = handle;
            try {
                afterDispatchCallable.call();
            } catch (InterruptedException e) {
                throw e;
            } catch (RuntimeException e) {
                throw e;
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

        @Override
        public Object beforeDispatch(AWTEvent event) throws InterruptedException {
            beforeDispatchEventArgument[0] = event;
            try {
                return beforeDispatchCallable.call();
            } catch (InterruptedException e) {
                throw e;
            } catch (RuntimeException e) {
                throw e;
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

        @Override
        public AWTEvent getNextEvent(EventQueue eventQueue) throws InterruptedException {
            getNextEventEventQueueArgument[0] = eventQueue;
            try {
                return getNextEventCallable.call();
            } catch (InterruptedException e) {
                throw e;
            } catch (RuntimeException e) {
                throw e;
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }
}