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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2010, 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 java.awt; | ||
| 27 | |||
| 28 | import java.awt.event.InputEvent; | ||
| 29 | import java.awt.event.MouseEvent; | ||
| 30 | import java.awt.event.ActionEvent; | ||
| 31 | import java.awt.event.WindowEvent; | ||
| 32 | import java.lang.reflect.Method; | ||
| 33 | import java.security.AccessController; | ||
| 34 | import sun.security.action.GetPropertyAction; | ||
| 35 | import sun.awt.AWTAutoShutdown; | ||
| 36 | import sun.awt.SunToolkit; | ||
| 37 | |||
| 38 | import java.util.Vector; | ||
| 39 | import sun.util.logging.PlatformLogger; | ||
| 40 | |||
| 41 | import sun.awt.dnd.SunDragSourceContextPeer; | ||
| 42 | import sun.awt.EventQueueDelegate; | ||
| 43 | |||
| 44 | /** | ||
| 45 | * EventDispatchThread is a package-private AWT class which takes | ||
| 46 | * events off the EventQueue and dispatches them to the appropriate | ||
| 47 | * AWT components. | ||
| 48 | * | ||
| 49 | * The Thread starts a "permanent" event pump with a call to | ||
| 50 | * pumpEvents(Conditional) in its run() method. Event handlers can choose to | ||
| 51 | * block this event pump at any time, but should start a new pump (<b>not</b> | ||
| 52 | * a new EventDispatchThread) by again calling pumpEvents(Conditional). This | ||
| 53 | * secondary event pump will exit automatically as soon as the Condtional | ||
| 54 | * evaluate()s to false and an additional Event is pumped and dispatched. | ||
| 55 | * | ||
| 56 | * @author Tom Ball | ||
| 57 | * @author Amy Fowler | ||
| 58 | * @author Fred Ecks | ||
| 59 | * @author David Mendenhall | ||
| 60 | * | ||
| 61 | * @since 1.1 | ||
| 62 | */ | ||
| 63 | class EventDispatchThread extends Thread { | ||
| 64 | |||
| 65 | private static final PlatformLogger eventLog = PlatformLogger.getLogger("java.awt.event.EventDispatchThread"); | ||
| 66 | |||
| 67 | private EventQueue theQueue; | ||
| 68 | private boolean doDispatch = true; | ||
| 69 | private boolean threadDeathCaught = false; | ||
| 70 | |||
| 71 | private static final int ANY_EVENT = -1; | ||
| 72 | |||
| 73 | private Vector<EventFilter> eventFilters = new Vector<EventFilter>(); | ||
| 74 | |||
| 75 | EventDispatchThread(ThreadGroup group, String name, EventQueue queue) { | ||
| 76 | super(group, name); | ||
| 77 | setEventQueue(queue); | ||
| 78 | } | ||
| 79 | |||
| 80 | /* | ||
| 81 | * Must be called on EDT only, that's why no synchronization | ||
| 82 | */ | ||
| 83 | public void stopDispatching() { | ||
| 84 | doDispatch = false; | ||
| 85 | } | ||
| 86 | |||
| 87 | public void run() { | ||
| 88 | while (true) { | ||
| 89 | try { | ||
| 90 | pumpEvents(new Conditional() { | ||
| 91 | public boolean evaluate() { | ||
| 92 | return true; | ||
| 93 | } | ||
| 94 | }); | ||
| 95 | } finally { | ||
| 96 | EventQueue eq = getEventQueue(); | ||
| 97 | if (eq.detachDispatchThread(this) || threadDeathCaught) { | ||
| 98 | break; | ||
| 99 | } | ||
| 100 | } | ||
| 101 | } | ||
| 102 | } | ||
| 103 | |||
| 104 | void pumpEvents(Conditional cond) { | ||
| 105 | pumpEvents(ANY_EVENT, cond); | ||
| 106 | } | ||
| 107 | |||
| 108 | void pumpEventsForHierarchy(Conditional cond, Component modalComponent) { | ||
| 109 | pumpEventsForHierarchy(ANY_EVENT, cond, modalComponent); | ||
| 110 | } | ||
| 111 | |||
| 112 | void pumpEvents(int id, Conditional cond) { | ||
| 113 | pumpEventsForHierarchy(id, cond, null); | ||
| 114 | } | ||
| 115 | |||
| 116 | void pumpEventsForHierarchy(int id, Conditional cond, Component modalComponent) { | ||
| 117 | pumpEventsForFilter(id, cond, new HierarchyEventFilter(modalComponent)); | ||
| 118 | } | ||
| 119 | |||
| 120 | void pumpEventsForFilter(Conditional cond, EventFilter filter) { | ||
| 121 | pumpEventsForFilter(ANY_EVENT, cond, filter); | ||
| 122 | } | ||
| 123 | |||
| 124 | void pumpEventsForFilter(int id, Conditional cond, EventFilter filter) { | ||
| 125 | addEventFilter(filter); | ||
| 126 | doDispatch = true; | ||
| 127 | while (doDispatch && cond.evaluate()) { | ||
| 128 | if (isInterrupted() || !pumpOneEventForFilters(id)) { | ||
| 129 | doDispatch = false; | ||
| 130 | } | ||
| 131 | } | ||
| 132 | removeEventFilter(filter); | ||
| 133 | } | ||
| 134 | |||
| 135 | void addEventFilter(EventFilter filter) { | ||
| 136 | eventLog.finest("adding the event filter: " + filter); | ||
| 137 | synchronized (eventFilters) { | ||
| 138 | if (!eventFilters.contains(filter)) { | ||
| 139 | if (filter instanceof ModalEventFilter) { | ||
| 140 | ModalEventFilter newFilter = (ModalEventFilter)filter; | ||
| 141 | int k = 0; | ||
| 142 | for (k = 0; k < eventFilters.size(); k++) { | ||
| 143 | EventFilter f = eventFilters.get(k); | ||
| 144 | if (f instanceof ModalEventFilter) { | ||
| 145 | ModalEventFilter cf = (ModalEventFilter)f; | ||
| 146 | if (cf.compareTo(newFilter) > 0) { | ||
| 147 | break; | ||
| 148 | } | ||
| 149 | } | ||
| 150 | } | ||
| 151 | eventFilters.add(k, filter); | ||
| 152 | } else { | ||
| 153 | eventFilters.add(filter); | ||
| 154 | } | ||
| 155 | } | ||
| 156 | } | ||
| 157 | } | ||
| 158 | |||
| 159 | void removeEventFilter(EventFilter filter) { | ||
| 160 | eventLog.finest("removing the event filter: " + filter); | ||
| 161 | synchronized (eventFilters) { | ||
| 162 | eventFilters.remove(filter); | ||
| 163 | } | ||
| 164 | } | ||
| 165 | |||
| 166 | boolean pumpOneEventForFilters(int id) { | ||
| 167 | AWTEvent event = null; | ||
| 168 | boolean eventOK = false; | ||
| 169 | try { | ||
| 170 | EventQueue eq = null; | ||
| 171 | EventQueueDelegate.Delegate delegate = null; | ||
| 172 | do { | ||
| 173 | // EventQueue may change during the dispatching | ||
| 174 | eq = getEventQueue(); | ||
| 175 | delegate = EventQueueDelegate.getDelegate(); | ||
| 176 | |||
| 177 | if (delegate != null && id == ANY_EVENT) { | ||
| 178 | event = delegate.getNextEvent(eq); | ||
| 179 | } else { | ||
| 180 | event = (id == ANY_EVENT) ? eq.getNextEvent() : eq.getNextEvent(id); | ||
| 181 | } | ||
| 182 | |||
| 183 | eventOK = true; | ||
| 184 | synchronized (eventFilters) { | ||
| 185 | for (int i = eventFilters.size() - 1; i >= 0; i--) { | ||
| 186 | EventFilter f = eventFilters.get(i); | ||
| 187 | EventFilter.FilterAction accept = f.acceptEvent(event); | ||
| 188 | if (accept == EventFilter.FilterAction.REJECT) { | ||
| 189 | eventOK = false; | ||
| 190 | break; | ||
| 191 | } else if (accept == EventFilter.FilterAction.ACCEPT_IMMEDIATELY) { | ||
| 192 | break; | ||
| 193 | } | ||
| 194 | } | ||
| 195 | } | ||
| 196 | eventOK = eventOK && SunDragSourceContextPeer.checkEvent(event); | ||
| 197 | if (!eventOK) { | ||
| 198 | event.consume(); | ||
| 199 | } | ||
| 200 | } | ||
| 201 | while (eventOK == false); | ||
| 202 | |||
| 203 | if (eventLog.isLoggable(PlatformLogger.FINEST)) { | ||
| 204 | eventLog.finest("Dispatching: " + event); | ||
| 205 | } | ||
| 206 | |||
| 207 | Object handle = null; | ||
| 208 | if (delegate != null) { | ||
| 209 | handle = delegate.beforeDispatch(event); | ||
| 210 | } | ||
| 211 | eq.dispatchEvent(event); | ||
| 212 | if (delegate != null) { | ||
| 213 | delegate.afterDispatch(event, handle); | ||
| 214 | } | ||
| 215 | |||
| 216 | return true; | ||
| 217 | } | ||
| 218 | catch (ThreadDeath death) { | ||
| 219 | threadDeathCaught = true; | ||
| 220 | return false; | ||
| 221 | |||
| 222 | } | ||
| 223 | catch (InterruptedException interruptedException) { | ||
| 224 | return false; // AppContext.dispose() interrupts all | ||
| 225 | // Threads in the AppContext | ||
| 226 | |||
| 227 | } | ||
| 228 | catch (Throwable e) { | ||
| 229 | processException(e); | ||
| 230 | } | ||
| 231 | |||
| 232 | return true; | ||
| 233 | } | ||
| 234 | |||
| 235 | private void processException(Throwable e) { | ||
| 236 | if (eventLog.isLoggable(PlatformLogger.FINE)) { | ||
| 237 | eventLog.fine("Processing exception: " + e); | ||
| 238 | } | ||
| 239 | getUncaughtExceptionHandler().uncaughtException(this, e); | ||
| 240 | } | ||
| 241 | |||
| 242 | public synchronized EventQueue getEventQueue() { | ||
| 243 | return theQueue; | ||
| 244 | } | ||
| 245 | public synchronized void setEventQueue(EventQueue eq) { | ||
| 246 | theQueue = eq; | ||
| 247 | } | ||
| 248 | |||
| 249 | private static class HierarchyEventFilter implements EventFilter { | ||
| 250 | private Component modalComponent; | ||
| 251 | public HierarchyEventFilter(Component modalComponent) { | ||
| 252 | this.modalComponent = modalComponent; | ||
| 253 | } | ||
| 254 | public FilterAction acceptEvent(AWTEvent event) { | ||
| 255 | if (modalComponent != null) { | ||
| 256 | int eventID = event.getID(); | ||
| 257 | boolean mouseEvent = (eventID >= MouseEvent.MOUSE_FIRST) && | ||
| 258 | (eventID <= MouseEvent.MOUSE_LAST); | ||
| 259 | boolean actionEvent = (eventID >= ActionEvent.ACTION_FIRST) && | ||
| 260 | (eventID <= ActionEvent.ACTION_LAST); | ||
| 261 | boolean windowClosingEvent = (eventID == WindowEvent.WINDOW_CLOSING); | ||
| 262 | /* | ||
| 263 | * filter out MouseEvent and ActionEvent that's outside | ||
| 264 | * the modalComponent hierarchy. | ||
| 265 | * KeyEvent is handled by using enqueueKeyEvent | ||
| 266 | * in Dialog.show | ||
| 267 | */ | ||
| 268 | if (Component.isInstanceOf(modalComponent, "javax.swing.JInternalFrame")) { | ||
| 269 | /* | ||
| 270 | * Modal internal frames are handled separately. If event is | ||
| 271 | * for some component from another heavyweight than modalComp, | ||
| 272 | * it is accepted. If heavyweight is the same - we still accept | ||
| 273 | * event and perform further filtering in LightweightDispatcher | ||
| 274 | */ | ||
| 275 | return windowClosingEvent ? FilterAction.REJECT : FilterAction.ACCEPT; | ||
| 276 | } | ||
| 277 | if (mouseEvent || actionEvent || windowClosingEvent) { | ||
| 278 | Object o = event.getSource(); | ||
| 279 | if (o instanceof sun.awt.ModalExclude) { | ||
| 280 | // Exclude this object from modality and | ||
| 281 | // continue to pump it's events. | ||
| 282 | return FilterAction.ACCEPT; | ||
| 283 | } else if (o instanceof Component) { | ||
| 284 | Component c = (Component) o; | ||
| 285 | // 5.0u3 modal exclusion | ||
| 286 | boolean modalExcluded = false; | ||
| 287 | if (modalComponent instanceof Container) { | ||
| 288 | while (c != modalComponent && c != null) { | ||
| 289 | if ((c instanceof Window) && | ||
| 290 | (sun.awt.SunToolkit.isModalExcluded((Window)c))) { | ||
| 291 | // Exclude this window and all its children from | ||
| 292 | // modality and continue to pump it's events. | ||
| 293 | modalExcluded = true; | ||
| 294 | break; | ||
| 295 | } | ||
| 296 | c = c.getParent(); | ||
| 297 | } | ||
| 298 | } | ||
| 299 | if (!modalExcluded && (c != modalComponent)) { | ||
| 300 | return FilterAction.REJECT; | ||
| 301 | } | ||
| 302 | } | ||
| 303 | } | ||
| 304 | } | ||
| 305 | return FilterAction.ACCEPT; | ||
| 306 | } | ||
| 307 | } | ||
| 308 | } | ||