--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/classes/java/awt/EventDispatchThread.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,278 @@
+/*
+ * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.awt;
+
+import java.awt.event.MouseEvent;
+import java.awt.event.ActionEvent;
+import java.awt.event.WindowEvent;
+
+import java.util.ArrayList;
+import sun.util.logging.PlatformLogger;
+
+import sun.awt.dnd.SunDragSourceContextPeer;
+
+/**
+ * EventDispatchThread is a package-private AWT class which takes
+ * events off the EventQueue and dispatches them to the appropriate
+ * AWT components.
+ *
+ * The Thread starts a "permanent" event pump with a call to
+ * pumpEvents(Conditional) in its run() method. Event handlers can choose to
+ * block this event pump at any time, but should start a new pump (<b>not</b>
+ * a new EventDispatchThread) by again calling pumpEvents(Conditional). This
+ * secondary event pump will exit automatically as soon as the Condtional
+ * evaluate()s to false and an additional Event is pumped and dispatched.
+ *
+ * @author Tom Ball
+ * @author Amy Fowler
+ * @author Fred Ecks
+ * @author David Mendenhall
+ *
+ * @since 1.1
+ */
+class EventDispatchThread extends Thread {
+
+ private static final PlatformLogger eventLog = PlatformLogger.getLogger("java.awt.event.EventDispatchThread");
+
+ private EventQueue theQueue;
+ private volatile boolean doDispatch = true;
+
+ private static final int ANY_EVENT = -1;
+
+ private ArrayList<EventFilter> eventFilters = new ArrayList<EventFilter>();
+
+ EventDispatchThread(ThreadGroup group, String name, EventQueue queue) {
+ super(group, name);
+ setEventQueue(queue);
+ }
+
+ /*
+ * Must be called on EDT only, that's why no synchronization
+ */
+ public void stopDispatching() {
+ doDispatch = false;
+ }
+
+ public void run() {
+ try {
+ pumpEvents(new Conditional() {
+ public boolean evaluate() {
+ return true;
+ }
+ });
+ } finally {
+ getEventQueue().detachDispatchThread(this);
+ }
+ }
+
+ void pumpEvents(Conditional cond) {
+ pumpEvents(ANY_EVENT, cond);
+ }
+
+ void pumpEventsForHierarchy(Conditional cond, Component modalComponent) {
+ pumpEventsForHierarchy(ANY_EVENT, cond, modalComponent);
+ }
+
+ void pumpEvents(int id, Conditional cond) {
+ pumpEventsForHierarchy(id, cond, null);
+ }
+
+ void pumpEventsForHierarchy(int id, Conditional cond, Component modalComponent) {
+ pumpEventsForFilter(id, cond, new HierarchyEventFilter(modalComponent));
+ }
+
+ void pumpEventsForFilter(Conditional cond, EventFilter filter) {
+ pumpEventsForFilter(ANY_EVENT, cond, filter);
+ }
+
+ void pumpEventsForFilter(int id, Conditional cond, EventFilter filter) {
+ addEventFilter(filter);
+ doDispatch = true;
+ while (doDispatch && !isInterrupted() && cond.evaluate()) {
+ pumpOneEventForFilters(id);
+ }
+ removeEventFilter(filter);
+ }
+
+ void addEventFilter(EventFilter filter) {
+ if (eventLog.isLoggable(PlatformLogger.Level.FINEST)) {
+ eventLog.finest("adding the event filter: " + filter);
+ }
+ synchronized (eventFilters) {
+ if (!eventFilters.contains(filter)) {
+ if (filter instanceof ModalEventFilter) {
+ ModalEventFilter newFilter = (ModalEventFilter)filter;
+ int k = 0;
+ for (k = 0; k < eventFilters.size(); k++) {
+ EventFilter f = eventFilters.get(k);
+ if (f instanceof ModalEventFilter) {
+ ModalEventFilter cf = (ModalEventFilter)f;
+ if (cf.compareTo(newFilter) > 0) {
+ break;
+ }
+ }
+ }
+ eventFilters.add(k, filter);
+ } else {
+ eventFilters.add(filter);
+ }
+ }
+ }
+ }
+
+ void removeEventFilter(EventFilter filter) {
+ if (eventLog.isLoggable(PlatformLogger.Level.FINEST)) {
+ eventLog.finest("removing the event filter: " + filter);
+ }
+ synchronized (eventFilters) {
+ eventFilters.remove(filter);
+ }
+ }
+
+ void pumpOneEventForFilters(int id) {
+ AWTEvent event = null;
+ boolean eventOK = false;
+ try {
+ EventQueue eq = null;
+ do {
+ // EventQueue may change during the dispatching
+ eq = getEventQueue();
+
+ event = (id == ANY_EVENT) ? eq.getNextEvent() : eq.getNextEvent(id);
+
+ eventOK = true;
+ synchronized (eventFilters) {
+ for (int i = eventFilters.size() - 1; i >= 0; i--) {
+ EventFilter f = eventFilters.get(i);
+ EventFilter.FilterAction accept = f.acceptEvent(event);
+ if (accept == EventFilter.FilterAction.REJECT) {
+ eventOK = false;
+ break;
+ } else if (accept == EventFilter.FilterAction.ACCEPT_IMMEDIATELY) {
+ break;
+ }
+ }
+ }
+ eventOK = eventOK && SunDragSourceContextPeer.checkEvent(event);
+ if (!eventOK) {
+ event.consume();
+ }
+ }
+ while (eventOK == false);
+
+ if (eventLog.isLoggable(PlatformLogger.Level.FINEST)) {
+ eventLog.finest("Dispatching: " + event);
+ }
+
+ eq.dispatchEvent(event);
+ }
+ catch (ThreadDeath death) {
+ doDispatch = false;
+ throw death;
+ }
+ catch (InterruptedException interruptedException) {
+ doDispatch = false; // AppContext.dispose() interrupts all
+ // Threads in the AppContext
+ }
+ catch (Throwable e) {
+ processException(e);
+ }
+ }
+
+ private void processException(Throwable e) {
+ if (eventLog.isLoggable(PlatformLogger.Level.FINE)) {
+ eventLog.fine("Processing exception: " + e);
+ }
+ getUncaughtExceptionHandler().uncaughtException(this, e);
+ }
+
+ public synchronized EventQueue getEventQueue() {
+ return theQueue;
+ }
+ public synchronized void setEventQueue(EventQueue eq) {
+ theQueue = eq;
+ }
+
+ private static class HierarchyEventFilter implements EventFilter {
+ private Component modalComponent;
+ public HierarchyEventFilter(Component modalComponent) {
+ this.modalComponent = modalComponent;
+ }
+ public FilterAction acceptEvent(AWTEvent event) {
+ if (modalComponent != null) {
+ int eventID = event.getID();
+ boolean mouseEvent = (eventID >= MouseEvent.MOUSE_FIRST) &&
+ (eventID <= MouseEvent.MOUSE_LAST);
+ boolean actionEvent = (eventID >= ActionEvent.ACTION_FIRST) &&
+ (eventID <= ActionEvent.ACTION_LAST);
+ boolean windowClosingEvent = (eventID == WindowEvent.WINDOW_CLOSING);
+ /*
+ * filter out MouseEvent and ActionEvent that's outside
+ * the modalComponent hierarchy.
+ * KeyEvent is handled by using enqueueKeyEvent
+ * in Dialog.show
+ */
+ if (Component.isInstanceOf(modalComponent, "javax.swing.JInternalFrame")) {
+ /*
+ * Modal internal frames are handled separately. If event is
+ * for some component from another heavyweight than modalComp,
+ * it is accepted. If heavyweight is the same - we still accept
+ * event and perform further filtering in LightweightDispatcher
+ */
+ return windowClosingEvent ? FilterAction.REJECT : FilterAction.ACCEPT;
+ }
+ if (mouseEvent || actionEvent || windowClosingEvent) {
+ Object o = event.getSource();
+ if (o instanceof sun.awt.ModalExclude) {
+ // Exclude this object from modality and
+ // continue to pump it's events.
+ return FilterAction.ACCEPT;
+ } else if (o instanceof Component) {
+ Component c = (Component) o;
+ // 5.0u3 modal exclusion
+ boolean modalExcluded = false;
+ if (modalComponent instanceof Container) {
+ while (c != modalComponent && c != null) {
+ if ((c instanceof Window) &&
+ (sun.awt.SunToolkit.isModalExcluded((Window)c))) {
+ // Exclude this window and all its children from
+ // modality and continue to pump it's events.
+ modalExcluded = true;
+ break;
+ }
+ c = c.getParent();
+ }
+ }
+ if (!modalExcluded && (c != modalComponent)) {
+ return FilterAction.REJECT;
+ }
+ }
+ }
+ }
+ return FilterAction.ACCEPT;
+ }
+ }
+}