| /* |
| * Copyright (c) 1996, 2015, 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.misc.ManagedLocalsThread; |
| 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 Conditional |
| * 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 ManagedLocalsThread { |
| |
| 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; |
| } |
| } |
| } |