author | herrick |
Fri, 12 Jun 2009 14:56:32 -0400 | |
changeset 3111 | fefdeafb7ab9 |
parent 2645 | 5dfb43cecd32 |
child 5506 | 202f599c92aa |
permissions | -rw-r--r-- |
2 | 1 |
/* |
715 | 2 |
* Copyright 1995-2008 Sun Microsystems, Inc. All Rights Reserved. |
2 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 |
* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
|
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* published by the Free Software Foundation. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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||
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package sun.applet; |
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import java.applet.*; |
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29 |
import java.awt.*; |
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30 |
import java.awt.event.*; |
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31 |
import java.awt.image.ColorModel; |
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import java.awt.image.MemoryImageSource; |
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import java.io.*; |
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import java.lang.ref.WeakReference; |
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import java.lang.reflect.InvocationTargetException; |
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import java.lang.reflect.Method; |
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import java.net.InetAddress; |
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import java.net.JarURLConnection; |
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import java.net.MalformedURLException; |
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import java.net.SocketPermission; |
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import java.net.URL; |
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import java.net.UnknownHostException; |
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import java.security.*; |
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import java.util.*; |
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import java.util.Collections; |
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46 |
import java.util.Locale; |
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47 |
import java.util.WeakHashMap; |
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import sun.awt.AppContext; |
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import sun.awt.EmbeddedFrame; |
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import sun.awt.SunToolkit; |
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import sun.misc.MessageUtils; |
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import sun.misc.PerformanceLogger; |
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import sun.misc.Queue; |
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import sun.security.util.SecurityConstants; |
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55 |
||
56 |
/** |
|
57 |
* Applet panel class. The panel manages and manipulates the |
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* applet as it is being loaded. It forks a separate thread in a new |
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* thread group to call the applet's init(), start(), stop(), and |
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* destroy() methods. |
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* |
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* @author Arthur van Hoff |
|
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*/ |
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public |
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abstract class AppletPanel extends Panel implements AppletStub, Runnable { |
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||
67 |
/** |
|
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* The applet (if loaded). |
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*/ |
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70 |
Applet applet; |
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71 |
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72 |
/** |
|
73 |
* Applet will allow initialization. Should be |
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* set to false if loading a serialized applet |
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75 |
* that was pickled in the init=true state. |
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*/ |
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77 |
protected boolean doInit = true; |
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80 |
/** |
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* The classloader for the applet. |
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*/ |
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3111
fefdeafb7ab9
6797688: Umbrella: Merge all JDK 6u4 - 6u12 deployment code into JDK7
herrick
parents:
2645
diff
changeset
|
83 |
protected AppletClassLoader loader; |
2 | 84 |
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85 |
/* applet event ids */ |
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public final static int APPLET_DISPOSE = 0; |
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public final static int APPLET_LOAD = 1; |
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public final static int APPLET_INIT = 2; |
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public final static int APPLET_START = 3; |
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public final static int APPLET_STOP = 4; |
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public final static int APPLET_DESTROY = 5; |
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public final static int APPLET_QUIT = 6; |
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public final static int APPLET_ERROR = 7; |
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95 |
/* send to the parent to force relayout */ |
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public final static int APPLET_RESIZE = 51234; |
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/* sent to a (distant) parent to indicate that the applet is being |
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* loaded or as completed loading |
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*/ |
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public final static int APPLET_LOADING = 51235; |
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public final static int APPLET_LOADING_COMPLETED = 51236; |
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/** |
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* The current status. One of: |
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* APPLET_DISPOSE, |
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* APPLET_LOAD, |
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* APPLET_INIT, |
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* APPLET_START, |
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* APPLET_STOP, |
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* APPLET_DESTROY, |
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* APPLET_ERROR. |
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*/ |
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protected int status; |
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115 |
||
116 |
/** |
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* The thread for the applet. |
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*/ |
|
3111
fefdeafb7ab9
6797688: Umbrella: Merge all JDK 6u4 - 6u12 deployment code into JDK7
herrick
parents:
2645
diff
changeset
|
119 |
protected Thread handler; |
2 | 120 |
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/** |
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* The initial applet size. |
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*/ |
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Dimension defaultAppletSize = new Dimension(10, 10); |
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127 |
/** |
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* The current applet size. |
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*/ |
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Dimension currentAppletSize = new Dimension(10, 10); |
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131 |
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MessageUtils mu = new MessageUtils(); |
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/** |
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* The thread to use during applet loading |
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*/ |
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137 |
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Thread loaderThread = null; |
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/** |
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* Flag to indicate that a loading has been cancelled |
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*/ |
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boolean loadAbortRequest = false; |
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||
145 |
/* abstract classes */ |
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abstract protected String getCode(); |
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abstract protected String getJarFiles(); |
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abstract protected String getSerializedObject(); |
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abstract public int getWidth(); |
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abstract public int getHeight(); |
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abstract public boolean hasInitialFocus(); |
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private static int threadGroupNumber = 0; |
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protected void setupAppletAppContext() { |
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// do nothing |
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} |
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/* |
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* Creates a thread to run the applet. This method is called |
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162 |
* each time an applet is loaded and reloaded. |
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*/ |
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164 |
synchronized void createAppletThread() { |
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// Create a thread group for the applet, and start a new |
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// thread to load the applet. |
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String nm = "applet-" + getCode(); |
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loader = getClassLoader(getCodeBase(), getClassLoaderCacheKey()); |
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loader.grab(); // Keep this puppy around! |
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// 4668479: Option to turn off codebase lookup in AppletClassLoader |
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// during resource requests. [stanley.ho] |
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String param = getParameter("codebase_lookup"); |
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if (param != null && param.equals("false")) |
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loader.setCodebaseLookup(false); |
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else |
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loader.setCodebaseLookup(true); |
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ThreadGroup appletGroup = loader.getThreadGroup(); |
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handler = new Thread(appletGroup, this, "thread " + nm); |
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// set the context class loader for this thread |
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AccessController.doPrivileged(new PrivilegedAction() { |
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public Object run() { |
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handler.setContextClassLoader(loader); |
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return null; |
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} |
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}); |
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handler.start(); |
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} |
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void joinAppletThread() throws InterruptedException { |
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if (handler != null) { |
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handler.join(); |
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handler = null; |
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} |
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} |
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void release() { |
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if (loader != null) { |
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loader.release(); |
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loader = null; |
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} |
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} |
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208 |
/** |
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* Construct an applet viewer and start the applet. |
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*/ |
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public void init() { |
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try { |
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// Get the width (if any) |
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defaultAppletSize.width = getWidth(); |
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currentAppletSize.width = defaultAppletSize.width; |
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// Get the height (if any) |
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defaultAppletSize.height = getHeight(); |
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currentAppletSize.height = defaultAppletSize.height; |
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} catch (NumberFormatException e) { |
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// Turn on the error flag and let TagAppletPanel |
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// do the right thing. |
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status = APPLET_ERROR; |
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showAppletStatus("badattribute.exception"); |
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showAppletLog("badattribute.exception"); |
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showAppletException(e); |
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} |
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setLayout(new BorderLayout()); |
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createAppletThread(); |
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} |
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/** |
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236 |
* Minimum size |
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*/ |
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238 |
public Dimension minimumSize() { |
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return new Dimension(defaultAppletSize.width, |
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defaultAppletSize.height); |
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} |
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242 |
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243 |
/** |
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* Preferred size |
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*/ |
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246 |
public Dimension preferredSize() { |
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return new Dimension(currentAppletSize.width, |
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currentAppletSize.height); |
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} |
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250 |
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251 |
private AppletListener listeners; |
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252 |
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/** |
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254 |
* AppletEvent Queue |
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*/ |
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private Queue queue = null; |
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257 |
||
258 |
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259 |
synchronized public void addAppletListener(AppletListener l) { |
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260 |
listeners = AppletEventMulticaster.add(listeners, l); |
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261 |
} |
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262 |
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263 |
synchronized public void removeAppletListener(AppletListener l) { |
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264 |
listeners = AppletEventMulticaster.remove(listeners, l); |
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265 |
} |
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266 |
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267 |
/** |
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268 |
* Dispatch event to the listeners.. |
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269 |
*/ |
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270 |
public void dispatchAppletEvent(int id, Object argument) { |
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//System.out.println("SEND= " + id); |
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272 |
if (listeners != null) { |
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273 |
AppletEvent evt = new AppletEvent(this, id, argument); |
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274 |
listeners.appletStateChanged(evt); |
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275 |
} |
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276 |
} |
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277 |
||
278 |
/** |
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279 |
* Send an event. Queue it for execution by the handler thread. |
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280 |
*/ |
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281 |
public void sendEvent(int id) { |
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282 |
synchronized(this) { |
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283 |
if (queue == null) { |
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//System.out.println("SEND0= " + id); |
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queue = new Queue(); |
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286 |
} |
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438
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6613529: Avoid duplicate object creation within JDK packages
dav
parents:
2
diff
changeset
|
287 |
Integer eventId = Integer.valueOf(id); |
2 | 288 |
queue.enqueue(eventId); |
289 |
notifyAll(); |
|
290 |
} |
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291 |
if (id == APPLET_QUIT) { |
|
292 |
try { |
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293 |
joinAppletThread(); // Let the applet event handler exit |
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294 |
} catch (InterruptedException e) { |
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295 |
} |
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296 |
||
297 |
// AppletClassLoader.release() must be called by a Thread |
|
298 |
// not within the applet's ThreadGroup |
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299 |
if (loader == null) |
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300 |
loader = getClassLoader(getCodeBase(), getClassLoaderCacheKey()); |
|
301 |
release(); |
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302 |
} |
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303 |
} |
|
304 |
||
305 |
/** |
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306 |
* Get an event from the queue. |
|
307 |
*/ |
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308 |
synchronized AppletEvent getNextEvent() throws InterruptedException { |
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309 |
while (queue == null || queue.isEmpty()) { |
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310 |
wait(); |
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311 |
} |
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312 |
Integer eventId = (Integer)queue.dequeue(); |
|
313 |
return new AppletEvent(this, eventId.intValue(), null); |
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314 |
} |
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315 |
||
316 |
boolean emptyEventQueue() { |
|
317 |
if ((queue == null) || (queue.isEmpty())) |
|
318 |
return true; |
|
319 |
else |
|
320 |
return false; |
|
321 |
} |
|
322 |
||
323 |
/** |
|
324 |
* This kludge is specific to get over AccessControlException thrown during |
|
325 |
* Applet.stop() or destroy() when static thread is suspended. Set a flag |
|
326 |
* in AppletClassLoader to indicate that an |
|
327 |
* AccessControlException for RuntimePermission "modifyThread" or |
|
328 |
* "modifyThreadGroup" had occurred. |
|
329 |
*/ |
|
330 |
private void setExceptionStatus(AccessControlException e) { |
|
331 |
Permission p = e.getPermission(); |
|
332 |
if (p instanceof RuntimePermission) { |
|
333 |
if (p.getName().startsWith("modifyThread")) { |
|
334 |
if (loader == null) |
|
335 |
loader = getClassLoader(getCodeBase(), getClassLoaderCacheKey()); |
|
336 |
loader.setExceptionStatus(); |
|
337 |
} |
|
338 |
} |
|
339 |
} |
|
340 |
||
341 |
/** |
|
342 |
* Execute applet events. |
|
343 |
* Here is the state transition diagram |
|
344 |
* |
|
345 |
* Note: (XXX) is the action |
|
346 |
* APPLET_XXX is the state |
|
347 |
* (applet code loaded) --> APPLET_LOAD -- (applet init called)--> APPLET_INIT -- ( |
|
348 |
* applet start called) --> APPLET_START -- (applet stop called) -->APPLET_STOP --(applet |
|
349 |
* destroyed called) --> APPLET_DESTROY -->(applet gets disposed) --> |
|
350 |
* APPLET_DISPOSE -->.... |
|
351 |
* |
|
352 |
* In the legacy lifecycle model. The applet gets loaded, inited and started. So it stays |
|
353 |
* in the APPLET_START state unless the applet goes away(refresh page or leave the page). |
|
354 |
* So the applet stop method called and the applet enters APPLET_STOP state. Then if the applet |
|
355 |
* is revisited, it will call applet start method and enter the APPLET_START state and stay there. |
|
356 |
* |
|
357 |
* In the modern lifecycle model. When the applet first time visited, it is same as legacy lifecycle |
|
358 |
* model. However, when the applet page goes away. It calls applet stop method and enters APPLET_STOP |
|
359 |
* state and then applet destroyed method gets called and enters APPLET_DESTROY state. |
|
360 |
* |
|
361 |
* This code is also called by AppletViewer. In AppletViewer "Restart" menu, the applet is jump from |
|
362 |
* APPLET_STOP to APPLET_DESTROY and to APPLET_INIT . |
|
363 |
* |
|
364 |
* Also, the applet can jump from APPLET_INIT state to APPLET_DESTROY (in Netscape/Mozilla case). |
|
365 |
* Same as APPLET_LOAD to |
|
366 |
* APPLET_DISPOSE since all of this are triggered by browser. |
|
367 |
* |
|
368 |
* |
|
369 |
*/ |
|
370 |
public void run() { |
|
371 |
||
372 |
Thread curThread = Thread.currentThread(); |
|
373 |
if (curThread == loaderThread) { |
|
374 |
// if we are in the loader thread, cause |
|
375 |
// loading to occur. We may exit this with |
|
376 |
// status being APPLET_DISPOSE, APPLET_ERROR, |
|
377 |
// or APPLET_LOAD |
|
378 |
runLoader(); |
|
379 |
return; |
|
380 |
} |
|
381 |
||
382 |
boolean disposed = false; |
|
383 |
while (!disposed && !curThread.isInterrupted()) { |
|
384 |
AppletEvent evt; |
|
385 |
try { |
|
386 |
evt = getNextEvent(); |
|
387 |
} catch (InterruptedException e) { |
|
388 |
showAppletStatus("bail"); |
|
389 |
return; |
|
390 |
} |
|
391 |
||
392 |
//showAppletStatus("EVENT = " + evt.getID()); |
|
393 |
try { |
|
394 |
switch (evt.getID()) { |
|
395 |
case APPLET_LOAD: |
|
396 |
if (!okToLoad()) { |
|
397 |
break; |
|
398 |
} |
|
399 |
// This complexity allows loading of applets to be |
|
400 |
// interruptable. The actual thread loading runs |
|
401 |
// in a separate thread, so it can be interrupted |
|
402 |
// without harming the applet thread. |
|
403 |
// So that we don't have to worry about |
|
404 |
// concurrency issues, the main applet thread waits |
|
405 |
// until the loader thread terminates. |
|
406 |
// (one way or another). |
|
407 |
if (loaderThread == null) { |
|
408 |
// REMIND: do we want a name? |
|
409 |
//System.out.println("------------------- loading applet"); |
|
410 |
setLoaderThread(new Thread(this)); |
|
411 |
loaderThread.start(); |
|
412 |
// we get to go to sleep while this runs |
|
413 |
loaderThread.join(); |
|
414 |
setLoaderThread(null); |
|
415 |
} else { |
|
416 |
// REMIND: issue an error -- this case should never |
|
417 |
// occur. |
|
418 |
} |
|
419 |
break; |
|
420 |
||
421 |
case APPLET_INIT: |
|
422 |
// AppletViewer "Restart" will jump from destroy method to |
|
423 |
// init, that is why we need to check status w/ APPLET_DESTROY |
|
424 |
if (status != APPLET_LOAD && status != APPLET_DESTROY) { |
|
425 |
showAppletStatus("notloaded"); |
|
426 |
break; |
|
427 |
} |
|
428 |
applet.resize(defaultAppletSize); |
|
429 |
if (doInit) { |
|
430 |
if (PerformanceLogger.loggingEnabled()) { |
|
431 |
PerformanceLogger.setTime("Applet Init"); |
|
432 |
PerformanceLogger.outputLog(); |
|
433 |
} |
|
434 |
applet.init(); |
|
435 |
} |
|
436 |
||
437 |
//Need the default(fallback) font to be created in this AppContext |
|
438 |
Font f = getFont(); |
|
439 |
if (f == null || |
|
440 |
"dialog".equals(f.getFamily().toLowerCase(Locale.ENGLISH)) && |
|
441 |
f.getSize() == 12 && f.getStyle() == Font.PLAIN) { |
|
442 |
setFont(new Font(Font.DIALOG, Font.PLAIN, 12)); |
|
443 |
} |
|
444 |
||
445 |
doInit = true; // allow restarts |
|
446 |
||
447 |
// Validate the applet in event dispatch thread |
|
448 |
// to avoid deadlock. |
|
449 |
try { |
|
450 |
final AppletPanel p = this; |
|
451 |
||
2645 | 452 |
EventQueue.invokeAndWait(new Runnable() { |
2 | 453 |
public void run() { |
454 |
p.validate(); |
|
455 |
} |
|
456 |
}); |
|
457 |
} |
|
458 |
catch(InterruptedException ie) { |
|
459 |
} |
|
460 |
catch(InvocationTargetException ite) { |
|
461 |
} |
|
462 |
||
463 |
status = APPLET_INIT; |
|
464 |
showAppletStatus("inited"); |
|
465 |
break; |
|
466 |
||
467 |
case APPLET_START: |
|
468 |
{ |
|
469 |
if (status != APPLET_INIT && status != APPLET_STOP) { |
|
470 |
showAppletStatus("notinited"); |
|
471 |
break; |
|
472 |
} |
|
473 |
applet.resize(currentAppletSize); |
|
474 |
applet.start(); |
|
475 |
||
476 |
// Validate and show the applet in event dispatch thread |
|
477 |
// to avoid deadlock. |
|
478 |
try { |
|
479 |
final AppletPanel p = this; |
|
480 |
final Applet a = applet; |
|
481 |
||
2645 | 482 |
EventQueue.invokeAndWait(new Runnable() { |
2 | 483 |
public void run() { |
484 |
p.validate(); |
|
485 |
a.setVisible(true); |
|
486 |
||
487 |
// Fix for BugTraq ID 4041703. |
|
488 |
// Set the default focus for an applet. |
|
489 |
if (hasInitialFocus()) |
|
490 |
setDefaultFocus(); |
|
491 |
} |
|
492 |
}); |
|
493 |
} |
|
494 |
catch(InterruptedException ie) { |
|
495 |
} |
|
496 |
catch(InvocationTargetException ite) { |
|
497 |
} |
|
498 |
||
499 |
status = APPLET_START; |
|
500 |
showAppletStatus("started"); |
|
501 |
break; |
|
502 |
} |
|
503 |
||
504 |
case APPLET_STOP: |
|
505 |
if (status != APPLET_START) { |
|
506 |
showAppletStatus("notstarted"); |
|
507 |
break; |
|
508 |
} |
|
509 |
status = APPLET_STOP; |
|
510 |
||
511 |
// Hide the applet in event dispatch thread |
|
512 |
// to avoid deadlock. |
|
513 |
try { |
|
514 |
final Applet a = applet; |
|
515 |
||
2645 | 516 |
EventQueue.invokeAndWait(new Runnable() { |
2 | 517 |
public void run() |
518 |
{ |
|
519 |
a.setVisible(false); |
|
520 |
} |
|
521 |
}); |
|
522 |
} |
|
523 |
catch(InterruptedException ie) { |
|
524 |
} |
|
525 |
catch(InvocationTargetException ite) { |
|
526 |
} |
|
527 |
||
528 |
||
529 |
// During Applet.stop(), any AccessControlException on an involved Class remains in |
|
530 |
// the "memory" of the AppletClassLoader. If the same instance of the ClassLoader is |
|
531 |
// reused, the same exception will occur during class loading. Set the AppletClassLoader's |
|
532 |
// exceptionStatusSet flag to allow recognition of what had happened |
|
533 |
// when reusing AppletClassLoader object. |
|
534 |
try { |
|
535 |
applet.stop(); |
|
536 |
} catch (java.security.AccessControlException e) { |
|
537 |
setExceptionStatus(e); |
|
538 |
// rethrow exception to be handled as it normally would be. |
|
539 |
throw e; |
|
540 |
} |
|
541 |
showAppletStatus("stopped"); |
|
542 |
break; |
|
543 |
||
544 |
case APPLET_DESTROY: |
|
545 |
if (status != APPLET_STOP && status != APPLET_INIT) { |
|
546 |
showAppletStatus("notstopped"); |
|
547 |
break; |
|
548 |
} |
|
549 |
status = APPLET_DESTROY; |
|
550 |
||
551 |
// During Applet.destroy(), any AccessControlException on an involved Class remains in |
|
552 |
// the "memory" of the AppletClassLoader. If the same instance of the ClassLoader is |
|
553 |
// reused, the same exception will occur during class loading. Set the AppletClassLoader's |
|
554 |
// exceptionStatusSet flag to allow recognition of what had happened |
|
555 |
// when reusing AppletClassLoader object. |
|
556 |
try { |
|
557 |
applet.destroy(); |
|
558 |
} catch (java.security.AccessControlException e) { |
|
559 |
setExceptionStatus(e); |
|
560 |
// rethrow exception to be handled as it normally would be. |
|
561 |
throw e; |
|
562 |
} |
|
563 |
showAppletStatus("destroyed"); |
|
564 |
break; |
|
565 |
||
566 |
case APPLET_DISPOSE: |
|
567 |
if (status != APPLET_DESTROY && status != APPLET_LOAD) { |
|
568 |
showAppletStatus("notdestroyed"); |
|
569 |
break; |
|
570 |
} |
|
571 |
status = APPLET_DISPOSE; |
|
572 |
||
573 |
try |
|
574 |
{ |
|
575 |
final Applet a = applet; |
|
576 |
||
577 |
EventQueue.invokeAndWait(new Runnable() |
|
578 |
{ |
|
579 |
public void run() |
|
580 |
{ |
|
581 |
remove(a); |
|
582 |
} |
|
583 |
}); |
|
584 |
} |
|
585 |
catch(InterruptedException ie) |
|
586 |
{ |
|
587 |
} |
|
588 |
catch(InvocationTargetException ite) |
|
589 |
{ |
|
590 |
} |
|
591 |
applet = null; |
|
592 |
showAppletStatus("disposed"); |
|
593 |
disposed = true; |
|
594 |
break; |
|
595 |
||
596 |
case APPLET_QUIT: |
|
597 |
return; |
|
598 |
} |
|
599 |
} catch (Exception e) { |
|
600 |
status = APPLET_ERROR; |
|
601 |
if (e.getMessage() != null) { |
|
602 |
showAppletStatus("exception2", e.getClass().getName(), |
|
603 |
e.getMessage()); |
|
604 |
} else { |
|
605 |
showAppletStatus("exception", e.getClass().getName()); |
|
606 |
} |
|
607 |
showAppletException(e); |
|
608 |
} catch (ThreadDeath e) { |
|
609 |
showAppletStatus("death"); |
|
610 |
return; |
|
611 |
} catch (Error e) { |
|
612 |
status = APPLET_ERROR; |
|
613 |
if (e.getMessage() != null) { |
|
614 |
showAppletStatus("error2", e.getClass().getName(), |
|
615 |
e.getMessage()); |
|
616 |
} else { |
|
617 |
showAppletStatus("error", e.getClass().getName()); |
|
618 |
} |
|
619 |
showAppletException(e); |
|
620 |
} |
|
621 |
clearLoadAbortRequest(); |
|
622 |
} |
|
623 |
} |
|
624 |
||
625 |
/** |
|
626 |
* Gets most recent focus owner component associated with the given window. |
|
627 |
* It does that without calling Window.getMostRecentFocusOwner since it |
|
628 |
* provides its own logic contradicting with setDefautlFocus. Instead, it |
|
629 |
* calls KeyboardFocusManager directly. |
|
630 |
*/ |
|
631 |
private Component getMostRecentFocusOwnerForWindow(Window w) { |
|
632 |
Method meth = (Method)AccessController.doPrivileged(new PrivilegedAction() { |
|
633 |
public Object run() { |
|
634 |
Method meth = null; |
|
635 |
try { |
|
636 |
meth = KeyboardFocusManager.class.getDeclaredMethod("getMostRecentFocusOwner", new Class[] {Window.class}); |
|
637 |
meth.setAccessible(true); |
|
638 |
} catch (Exception e) { |
|
639 |
// Must never happen |
|
640 |
e.printStackTrace(); |
|
641 |
} |
|
642 |
return meth; |
|
643 |
} |
|
644 |
}); |
|
645 |
if (meth != null) { |
|
646 |
// Meth refers static method |
|
647 |
try { |
|
648 |
return (Component)meth.invoke(null, new Object[] {w}); |
|
649 |
} catch (Exception e) { |
|
650 |
// Must never happen |
|
651 |
e.printStackTrace(); |
|
652 |
} |
|
653 |
} |
|
654 |
// Will get here if exception was thrown or meth is null |
|
655 |
return w.getMostRecentFocusOwner(); |
|
656 |
} |
|
657 |
||
658 |
/* |
|
659 |
* Fix for BugTraq ID 4041703. |
|
660 |
* Set the focus to a reasonable default for an Applet. |
|
661 |
*/ |
|
662 |
private void setDefaultFocus() { |
|
663 |
Component toFocus = null; |
|
664 |
Container parent = getParent(); |
|
665 |
||
666 |
if(parent != null) { |
|
667 |
if (parent instanceof Window) { |
|
668 |
toFocus = getMostRecentFocusOwnerForWindow((Window)parent); |
|
669 |
if (toFocus == parent || toFocus == null) { |
|
670 |
toFocus = parent.getFocusTraversalPolicy(). |
|
671 |
getInitialComponent((Window)parent); |
|
672 |
} |
|
673 |
} else if (parent.isFocusCycleRoot()) { |
|
674 |
toFocus = parent.getFocusTraversalPolicy(). |
|
675 |
getDefaultComponent(parent); |
|
676 |
} |
|
677 |
} |
|
678 |
||
679 |
if (toFocus != null) { |
|
680 |
if (parent instanceof EmbeddedFrame) { |
|
681 |
((EmbeddedFrame)parent).synthesizeWindowActivation(true); |
|
682 |
} |
|
683 |
// EmbeddedFrame might have focus before the applet was added. |
|
684 |
// Thus after its activation the most recent focus owner will be |
|
685 |
// restored. We need the applet's initial focusabled component to |
|
686 |
// be focused here. |
|
687 |
toFocus.requestFocusInWindow(); |
|
688 |
} |
|
689 |
} |
|
690 |
||
691 |
/** |
|
692 |
* Load the applet into memory. |
|
693 |
* Runs in a seperate (and interruptible) thread from the rest of the |
|
694 |
* applet event processing so that it can be gracefully interrupted from |
|
695 |
* things like HotJava. |
|
696 |
*/ |
|
697 |
private void runLoader() { |
|
698 |
if (status != APPLET_DISPOSE) { |
|
699 |
showAppletStatus("notdisposed"); |
|
700 |
return; |
|
701 |
} |
|
702 |
||
703 |
dispatchAppletEvent(APPLET_LOADING, null); |
|
704 |
||
705 |
// REMIND -- might be cool to visually indicate loading here -- |
|
706 |
// maybe do animation? |
|
707 |
status = APPLET_LOAD; |
|
708 |
||
709 |
// Create a class loader |
|
710 |
loader = getClassLoader(getCodeBase(), getClassLoaderCacheKey()); |
|
711 |
||
712 |
// Load the archives if present. |
|
713 |
// REMIND - this probably should be done in a separate thread, |
|
714 |
// or at least the additional archives (epll). |
|
715 |
||
716 |
String code = getCode(); |
|
717 |
||
718 |
// setup applet AppContext |
|
719 |
// this must be called before loadJarFiles |
|
720 |
setupAppletAppContext(); |
|
721 |
||
722 |
try { |
|
723 |
loadJarFiles(loader); |
|
724 |
applet = createApplet(loader); |
|
725 |
} catch (ClassNotFoundException e) { |
|
726 |
status = APPLET_ERROR; |
|
727 |
showAppletStatus("notfound", code); |
|
728 |
showAppletLog("notfound", code); |
|
729 |
showAppletException(e); |
|
730 |
return; |
|
731 |
} catch (InstantiationException e) { |
|
732 |
status = APPLET_ERROR; |
|
733 |
showAppletStatus("nocreate", code); |
|
734 |
showAppletLog("nocreate", code); |
|
735 |
showAppletException(e); |
|
736 |
return; |
|
737 |
} catch (IllegalAccessException e) { |
|
738 |
status = APPLET_ERROR; |
|
739 |
showAppletStatus("noconstruct", code); |
|
740 |
showAppletLog("noconstruct", code); |
|
741 |
showAppletException(e); |
|
742 |
// sbb -- I added a return here |
|
743 |
return; |
|
744 |
} catch (Exception e) { |
|
745 |
status = APPLET_ERROR; |
|
746 |
showAppletStatus("exception", e.getMessage()); |
|
747 |
showAppletException(e); |
|
748 |
return; |
|
749 |
} catch (ThreadDeath e) { |
|
750 |
status = APPLET_ERROR; |
|
751 |
showAppletStatus("death"); |
|
752 |
return; |
|
753 |
} catch (Error e) { |
|
754 |
status = APPLET_ERROR; |
|
755 |
showAppletStatus("error", e.getMessage()); |
|
756 |
showAppletException(e); |
|
757 |
return; |
|
758 |
} finally { |
|
759 |
// notify that loading is no longer going on |
|
760 |
dispatchAppletEvent(APPLET_LOADING_COMPLETED, null); |
|
761 |
} |
|
762 |
||
763 |
// Fixed #4508194: NullPointerException thrown during |
|
764 |
// quick page switch |
|
765 |
// |
|
766 |
if (applet != null) |
|
767 |
{ |
|
768 |
// Stick it in the frame |
|
769 |
applet.setStub(this); |
|
770 |
applet.hide(); |
|
771 |
add("Center", applet); |
|
772 |
showAppletStatus("loaded"); |
|
773 |
validate(); |
|
774 |
} |
|
775 |
} |
|
776 |
||
777 |
protected Applet createApplet(final AppletClassLoader loader) throws ClassNotFoundException, |
|
778 |
IllegalAccessException, IOException, InstantiationException, InterruptedException { |
|
779 |
final String serName = getSerializedObject(); |
|
780 |
String code = getCode(); |
|
781 |
||
782 |
if (code != null && serName != null) { |
|
783 |
System.err.println(amh.getMessage("runloader.err")); |
|
784 |
// return null; |
|
785 |
throw new InstantiationException("Either \"code\" or \"object\" should be specified, but not both."); |
|
786 |
} |
|
787 |
if (code == null && serName == null) { |
|
788 |
String msg = "nocode"; |
|
789 |
status = APPLET_ERROR; |
|
790 |
showAppletStatus(msg); |
|
791 |
showAppletLog(msg); |
|
792 |
repaint(); |
|
793 |
} |
|
794 |
if (code != null) { |
|
795 |
applet = (Applet)loader.loadCode(code).newInstance(); |
|
796 |
doInit = true; |
|
797 |
} else { |
|
798 |
// serName is not null; |
|
799 |
InputStream is = (InputStream) |
|
800 |
java.security.AccessController.doPrivileged( |
|
801 |
new java.security.PrivilegedAction() { |
|
802 |
public Object run() { |
|
803 |
return loader.getResourceAsStream(serName); |
|
804 |
} |
|
805 |
}); |
|
806 |
ObjectInputStream ois = |
|
807 |
new AppletObjectInputStream(is, loader); |
|
808 |
Object serObject = ois.readObject(); |
|
809 |
applet = (Applet) serObject; |
|
810 |
doInit = false; // skip over the first init |
|
811 |
} |
|
812 |
||
813 |
// Determine the JDK level that the applet targets. |
|
814 |
// This is critical for enabling certain backward |
|
815 |
// compatibility switch if an applet is a JDK 1.1 |
|
816 |
// applet. [stanley.ho] |
|
817 |
findAppletJDKLevel(applet); |
|
818 |
||
819 |
if (Thread.interrupted()) { |
|
820 |
try { |
|
821 |
status = APPLET_DISPOSE; // APPLET_ERROR? |
|
822 |
applet = null; |
|
823 |
// REMIND: This may not be exactly the right thing: the |
|
824 |
// status is set by the stop button and not necessarily |
|
825 |
// here. |
|
826 |
showAppletStatus("death"); |
|
827 |
} finally { |
|
828 |
Thread.currentThread().interrupt(); // resignal interrupt |
|
829 |
} |
|
830 |
return null; |
|
831 |
} |
|
832 |
return applet; |
|
833 |
} |
|
834 |
||
835 |
protected void loadJarFiles(AppletClassLoader loader) throws IOException, |
|
836 |
InterruptedException { |
|
837 |
// Load the archives if present. |
|
838 |
// REMIND - this probably should be done in a separate thread, |
|
839 |
// or at least the additional archives (epll). |
|
840 |
String jarFiles = getJarFiles(); |
|
841 |
||
842 |
if (jarFiles != null) { |
|
843 |
StringTokenizer st = new StringTokenizer(jarFiles, ",", false); |
|
844 |
while(st.hasMoreTokens()) { |
|
845 |
String tok = st.nextToken().trim(); |
|
846 |
try { |
|
847 |
loader.addJar(tok); |
|
848 |
} catch (IllegalArgumentException e) { |
|
849 |
// bad archive name |
|
850 |
continue; |
|
851 |
} |
|
852 |
} |
|
853 |
} |
|
854 |
} |
|
855 |
||
856 |
/** |
|
857 |
* Request that the loading of the applet be stopped. |
|
858 |
*/ |
|
859 |
protected synchronized void stopLoading() { |
|
860 |
// REMIND: fill in the body |
|
861 |
if (loaderThread != null) { |
|
862 |
//System.out.println("Interrupting applet loader thread: " + loaderThread); |
|
863 |
loaderThread.interrupt(); |
|
864 |
} else { |
|
865 |
setLoadAbortRequest(); |
|
866 |
} |
|
867 |
} |
|
868 |
||
869 |
||
870 |
protected synchronized boolean okToLoad() { |
|
871 |
return !loadAbortRequest; |
|
872 |
} |
|
873 |
||
874 |
protected synchronized void clearLoadAbortRequest() { |
|
875 |
loadAbortRequest = false; |
|
876 |
} |
|
877 |
||
878 |
protected synchronized void setLoadAbortRequest() { |
|
879 |
loadAbortRequest = true; |
|
880 |
} |
|
881 |
||
882 |
||
883 |
private synchronized void setLoaderThread(Thread loaderThread) { |
|
884 |
this.loaderThread = loaderThread; |
|
885 |
} |
|
886 |
||
887 |
/** |
|
888 |
* Return true when the applet has been started. |
|
889 |
*/ |
|
890 |
public boolean isActive() { |
|
891 |
return status == APPLET_START; |
|
892 |
} |
|
893 |
||
894 |
||
895 |
private EventQueue appEvtQ = null; |
|
896 |
/** |
|
897 |
* Is called when the applet wants to be resized. |
|
898 |
*/ |
|
899 |
public void appletResize(int width, int height) { |
|
900 |
currentAppletSize.width = width; |
|
901 |
currentAppletSize.height = height; |
|
902 |
final Dimension currentSize = new Dimension(currentAppletSize.width, |
|
903 |
currentAppletSize.height); |
|
904 |
||
905 |
if(loader != null) { |
|
906 |
AppContext appCtxt = loader.getAppContext(); |
|
907 |
if(appCtxt != null) |
|
908 |
appEvtQ = (java.awt.EventQueue)appCtxt.get(AppContext.EVENT_QUEUE_KEY); |
|
909 |
} |
|
910 |
||
911 |
final AppletPanel ap = this; |
|
912 |
if (appEvtQ != null){ |
|
913 |
appEvtQ.postEvent(new InvocationEvent(Toolkit.getDefaultToolkit(), |
|
914 |
new Runnable(){ |
|
915 |
public void run(){ |
|
916 |
if(ap != null) |
|
917 |
{ |
|
918 |
ap.dispatchAppletEvent(APPLET_RESIZE, currentSize); |
|
919 |
} |
|
920 |
} |
|
921 |
})); |
|
922 |
} |
|
923 |
} |
|
924 |
||
925 |
public void setBounds(int x, int y, int width, int height) { |
|
926 |
super.setBounds(x, y, width, height); |
|
927 |
currentAppletSize.width = width; |
|
928 |
currentAppletSize.height = height; |
|
929 |
} |
|
930 |
||
931 |
public Applet getApplet() { |
|
932 |
return applet; |
|
933 |
} |
|
934 |
||
935 |
/** |
|
936 |
* Status line. Called by the AppletPanel to provide |
|
937 |
* feedback on the Applet's state. |
|
938 |
*/ |
|
939 |
protected void showAppletStatus(String status) { |
|
940 |
getAppletContext().showStatus(amh.getMessage(status)); |
|
941 |
} |
|
942 |
||
943 |
protected void showAppletStatus(String status, Object arg) { |
|
944 |
getAppletContext().showStatus(amh.getMessage(status, arg)); |
|
945 |
} |
|
946 |
protected void showAppletStatus(String status, Object arg1, Object arg2) { |
|
947 |
getAppletContext().showStatus(amh.getMessage(status, arg1, arg2)); |
|
948 |
} |
|
949 |
||
950 |
/** |
|
951 |
* Called by the AppletPanel to print to the log. |
|
952 |
*/ |
|
953 |
protected void showAppletLog(String msg) { |
|
954 |
System.out.println(amh.getMessage(msg)); |
|
955 |
} |
|
956 |
||
957 |
protected void showAppletLog(String msg, Object arg) { |
|
958 |
System.out.println(amh.getMessage(msg, arg)); |
|
959 |
} |
|
960 |
||
961 |
/** |
|
962 |
* Called by the AppletPanel to provide |
|
963 |
* feedback when an exception has happened. |
|
964 |
*/ |
|
965 |
protected void showAppletException(Throwable t) { |
|
966 |
t.printStackTrace(); |
|
967 |
repaint(); |
|
968 |
} |
|
969 |
||
970 |
/** |
|
971 |
* Get caching key for classloader cache |
|
972 |
*/ |
|
973 |
public String getClassLoaderCacheKey() |
|
974 |
{ |
|
975 |
/** |
|
976 |
* Fixed #4501142: Classlaoder sharing policy doesn't |
|
977 |
* take "archive" into account. This will be overridden |
|
978 |
* by Java Plug-in. [stanleyh] |
|
979 |
*/ |
|
980 |
return getCodeBase().toString(); |
|
981 |
} |
|
982 |
||
983 |
/** |
|
984 |
* The class loaders |
|
985 |
*/ |
|
986 |
private static HashMap classloaders = new HashMap(); |
|
987 |
||
988 |
/** |
|
989 |
* Flush a class loader. |
|
990 |
*/ |
|
991 |
public static synchronized void flushClassLoader(String key) { |
|
992 |
classloaders.remove(key); |
|
993 |
} |
|
994 |
||
995 |
/** |
|
996 |
* Flush all class loaders. |
|
997 |
*/ |
|
998 |
public static synchronized void flushClassLoaders() { |
|
999 |
classloaders = new HashMap(); |
|
1000 |
} |
|
1001 |
||
1002 |
/** |
|
1003 |
* This method actually creates an AppletClassLoader. |
|
1004 |
* |
|
1005 |
* It can be override by subclasses (such as the Plug-in) |
|
1006 |
* to provide different classloaders. |
|
1007 |
*/ |
|
1008 |
protected AppletClassLoader createClassLoader(final URL codebase) { |
|
1009 |
return new AppletClassLoader(codebase); |
|
1010 |
} |
|
1011 |
||
1012 |
/** |
|
1013 |
* Get a class loader. Create in a restricted context |
|
1014 |
*/ |
|
1015 |
synchronized AppletClassLoader getClassLoader(final URL codebase, final String key) { |
|
1016 |
AppletClassLoader c = (AppletClassLoader)classloaders.get(key); |
|
1017 |
if (c == null) { |
|
1018 |
AccessControlContext acc = |
|
1019 |
getAccessControlContext(codebase); |
|
1020 |
c = (AppletClassLoader) |
|
1021 |
AccessController.doPrivileged(new PrivilegedAction() { |
|
1022 |
public Object run() { |
|
1023 |
AppletClassLoader ac = createClassLoader(codebase); |
|
1024 |
/* Should the creation of the classloader be |
|
1025 |
* within the class synchronized block? Since |
|
1026 |
* this class is used by the plugin, take care |
|
1027 |
* to avoid deadlocks, or specialize |
|
1028 |
* AppletPanel within the plugin. It may take |
|
1029 |
* an arbitrary amount of time to create a |
|
1030 |
* class loader (involving getting Jar files |
|
1031 |
* etc.) and may block unrelated applets from |
|
1032 |
* finishing createAppletThread (due to the |
|
1033 |
* class synchronization). If |
|
1034 |
* createAppletThread does not finish quickly, |
|
1035 |
* the applet cannot process other messages, |
|
1036 |
* particularly messages such as destroy |
|
1037 |
* (which timeout when called from the browser). |
|
1038 |
*/ |
|
1039 |
synchronized (getClass()) { |
|
1040 |
AppletClassLoader res = |
|
1041 |
(AppletClassLoader)classloaders.get(key); |
|
1042 |
if (res == null) { |
|
1043 |
classloaders.put(key, ac); |
|
1044 |
return ac; |
|
1045 |
} else { |
|
1046 |
return res; |
|
1047 |
} |
|
1048 |
} |
|
1049 |
} |
|
1050 |
},acc); |
|
1051 |
} |
|
1052 |
return c; |
|
1053 |
} |
|
1054 |
||
1055 |
/** |
|
1056 |
* get the context for the AppletClassLoader we are creating. |
|
1057 |
* the context is granted permission to create the class loader, |
|
1058 |
* connnect to the codebase, and whatever else the policy grants |
|
1059 |
* to all codebases. |
|
1060 |
*/ |
|
1061 |
private AccessControlContext getAccessControlContext(final URL codebase) { |
|
1062 |
||
1063 |
PermissionCollection perms = (PermissionCollection) |
|
1064 |
AccessController.doPrivileged(new PrivilegedAction() { |
|
1065 |
public Object run() { |
|
1066 |
Policy p = java.security.Policy.getPolicy(); |
|
1067 |
if (p != null) { |
|
1068 |
return p.getPermissions(new CodeSource(null, |
|
1069 |
(java.security.cert.Certificate[]) null)); |
|
1070 |
} else { |
|
1071 |
return null; |
|
1072 |
} |
|
1073 |
} |
|
1074 |
}); |
|
1075 |
||
1076 |
if (perms == null) |
|
1077 |
perms = new Permissions(); |
|
1078 |
||
1079 |
//XXX: this is needed to be able to create the classloader itself! |
|
1080 |
||
1081 |
perms.add(SecurityConstants.CREATE_CLASSLOADER_PERMISSION); |
|
1082 |
||
1083 |
Permission p; |
|
1084 |
java.net.URLConnection urlConnection = null; |
|
1085 |
try { |
|
1086 |
urlConnection = codebase.openConnection(); |
|
1087 |
p = urlConnection.getPermission(); |
|
1088 |
} catch (java.io.IOException ioe) { |
|
1089 |
p = null; |
|
1090 |
} |
|
1091 |
||
1092 |
if (p != null) |
|
1093 |
perms.add(p); |
|
1094 |
||
1095 |
if (p instanceof FilePermission) { |
|
1096 |
||
1097 |
String path = p.getName(); |
|
1098 |
||
1099 |
int endIndex = path.lastIndexOf(File.separatorChar); |
|
1100 |
||
1101 |
if (endIndex != -1) { |
|
1102 |
path = path.substring(0, endIndex+1); |
|
1103 |
||
1104 |
if (path.endsWith(File.separator)) { |
|
1105 |
path += "-"; |
|
1106 |
} |
|
1107 |
perms.add(new FilePermission(path, |
|
1108 |
SecurityConstants.FILE_READ_ACTION)); |
|
1109 |
} |
|
1110 |
} else { |
|
1111 |
URL locUrl = codebase; |
|
1112 |
if (urlConnection instanceof JarURLConnection) { |
|
1113 |
locUrl = ((JarURLConnection)urlConnection).getJarFileURL(); |
|
1114 |
} |
|
1115 |
String host = locUrl.getHost(); |
|
1116 |
if (host != null && (host.length() > 0)) |
|
1117 |
perms.add(new SocketPermission(host, |
|
1118 |
SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION)); |
|
1119 |
} |
|
1120 |
||
1121 |
ProtectionDomain domain = |
|
1122 |
new ProtectionDomain(new CodeSource(codebase, |
|
1123 |
(java.security.cert.Certificate[]) null), perms); |
|
1124 |
AccessControlContext acc = |
|
1125 |
new AccessControlContext(new ProtectionDomain[] { domain }); |
|
1126 |
||
1127 |
return acc; |
|
1128 |
} |
|
1129 |
||
1130 |
public Thread getAppletHandlerThread() { |
|
1131 |
return handler; |
|
1132 |
} |
|
1133 |
||
1134 |
public int getAppletWidth() { |
|
1135 |
return currentAppletSize.width; |
|
1136 |
} |
|
1137 |
||
1138 |
public int getAppletHeight() { |
|
1139 |
return currentAppletSize.height; |
|
1140 |
} |
|
1141 |
||
1142 |
public static void changeFrameAppContext(Frame frame, AppContext newAppContext) |
|
1143 |
{ |
|
1144 |
// Fixed #4754451: Applet can have methods running on main |
|
1145 |
// thread event queue. |
|
1146 |
// |
|
1147 |
// The cause of this bug is that the frame of the applet |
|
1148 |
// is created in main thread group. Thus, when certain |
|
1149 |
// AWT/Swing events are generated, the events will be |
|
1150 |
// dispatched through the wrong event dispatch thread. |
|
1151 |
// |
|
1152 |
// To fix this, we rearrange the AppContext with the frame, |
|
1153 |
// so the proper event queue will be looked up. |
|
1154 |
// |
|
1155 |
// Swing also maintains a Frame list for the AppContext, |
|
1156 |
// so we will have to rearrange it as well. |
|
1157 |
||
1158 |
// Check if frame's AppContext has already been set properly |
|
1159 |
AppContext oldAppContext = SunToolkit.targetToAppContext(frame); |
|
1160 |
||
1161 |
if (oldAppContext == newAppContext) |
|
1162 |
return; |
|
1163 |
||
1164 |
// Synchronization on Window.class is needed for locking the |
|
1165 |
// critical section of the window list in AppContext. |
|
1166 |
synchronized (Window.class) |
|
1167 |
{ |
|
1168 |
WeakReference weakRef = null; |
|
1169 |
// Remove frame from the Window list in wrong AppContext |
|
1170 |
{ |
|
1171 |
// Lookup current frame's AppContext |
|
1172 |
Vector<WeakReference<Window>> windowList = (Vector<WeakReference<Window>>)oldAppContext.get(Window.class); |
|
1173 |
if (windowList != null) { |
|
1174 |
for (WeakReference ref : windowList) { |
|
1175 |
if (ref.get() == frame) { |
|
1176 |
weakRef = ref; |
|
1177 |
break; |
|
1178 |
} |
|
1179 |
} |
|
1180 |
// Remove frame from wrong AppContext |
|
1181 |
if (weakRef != null) |
|
1182 |
windowList.remove(weakRef); |
|
1183 |
} |
|
1184 |
} |
|
1185 |
||
1186 |
// Put the frame into the applet's AppContext map |
|
1187 |
SunToolkit.insertTargetMapping(frame, newAppContext); |
|
1188 |
||
1189 |
// Insert frame into the Window list in the applet's AppContext map |
|
1190 |
{ |
|
1191 |
Vector<WeakReference<Window>> windowList = (Vector)newAppContext.get(Window.class); |
|
1192 |
if (windowList == null) { |
|
1193 |
windowList = new Vector<WeakReference<Window>>(); |
|
1194 |
newAppContext.put(Window.class, windowList); |
|
1195 |
} |
|
1196 |
// use the same weakRef here as it is used elsewhere |
|
1197 |
windowList.add(weakRef); |
|
1198 |
} |
|
1199 |
} |
|
1200 |
} |
|
1201 |
||
1202 |
// Flag to indicate if applet is targeted for JDK 1.1. |
|
1203 |
private boolean jdk11Applet = false; |
|
1204 |
||
1205 |
// Flag to indicate if applet is targeted for JDK 1.2. |
|
1206 |
private boolean jdk12Applet = false; |
|
1207 |
||
1208 |
/** |
|
1209 |
* Determine JDK level of an applet. |
|
1210 |
*/ |
|
1211 |
private void findAppletJDKLevel(Applet applet) |
|
1212 |
{ |
|
1213 |
// To determine the JDK level of an applet, the |
|
1214 |
// most reliable way is to check the major version |
|
1215 |
// of the applet class file. |
|
1216 |
||
1217 |
// synchronized on applet class object, so calling from |
|
1218 |
// different instances of the same applet will be |
|
1219 |
// serialized. |
|
1220 |
Class appletClass = applet.getClass(); |
|
1221 |
||
1222 |
synchronized(appletClass) { |
|
1223 |
// Determine if the JDK level of an applet has been |
|
1224 |
// checked before. |
|
1225 |
Boolean jdk11Target = (Boolean) loader.isJDK11Target(appletClass); |
|
1226 |
Boolean jdk12Target = (Boolean) loader.isJDK12Target(appletClass); |
|
1227 |
||
1228 |
// if applet JDK level has been checked before, retrieve |
|
1229 |
// value and return. |
|
1230 |
if (jdk11Target != null || jdk12Target != null) { |
|
1231 |
jdk11Applet = (jdk11Target == null) ? false : jdk11Target.booleanValue(); |
|
1232 |
jdk12Applet = (jdk12Target == null) ? false : jdk12Target.booleanValue(); |
|
1233 |
return; |
|
1234 |
} |
|
1235 |
||
1236 |
String name = appletClass.getName(); |
|
1237 |
||
1238 |
// first convert any '.' to '/' |
|
1239 |
name = name.replace('.', '/'); |
|
1240 |
||
1241 |
// append .class |
|
1242 |
final String resourceName = name + ".class"; |
|
1243 |
||
1244 |
InputStream is = null; |
|
1245 |
byte[] classHeader = new byte[8]; |
|
1246 |
||
1247 |
try { |
|
1248 |
is = (InputStream) java.security.AccessController.doPrivileged( |
|
1249 |
new java.security.PrivilegedAction() { |
|
1250 |
public Object run() { |
|
1251 |
return loader.getResourceAsStream(resourceName); |
|
1252 |
} |
|
1253 |
}); |
|
1254 |
||
1255 |
// Read the first 8 bytes of the class file |
|
1256 |
int byteRead = is.read(classHeader, 0, 8); |
|
1257 |
is.close(); |
|
1258 |
||
1259 |
// return if the header is not read in entirely |
|
1260 |
// for some reasons. |
|
1261 |
if (byteRead != 8) |
|
1262 |
return; |
|
1263 |
} |
|
1264 |
catch (IOException e) { |
|
1265 |
return; |
|
1266 |
} |
|
1267 |
||
1268 |
// Check major version in class file header |
|
1269 |
int major_version = readShort(classHeader, 6); |
|
1270 |
||
1271 |
// Major version in class file is as follows: |
|
1272 |
// 45 - JDK 1.1 |
|
1273 |
// 46 - JDK 1.2 |
|
1274 |
// 47 - JDK 1.3 |
|
1275 |
// 48 - JDK 1.4 |
|
1276 |
// 49 - JDK 1.5 |
|
1277 |
if (major_version < 46) |
|
1278 |
jdk11Applet = true; |
|
1279 |
else if (major_version == 46) |
|
1280 |
jdk12Applet = true; |
|
1281 |
||
1282 |
// Store applet JDK level in AppContext for later lookup, |
|
1283 |
// e.g. page switch. |
|
1284 |
loader.setJDK11Target(appletClass, jdk11Applet); |
|
1285 |
loader.setJDK12Target(appletClass, jdk12Applet); |
|
1286 |
} |
|
1287 |
} |
|
1288 |
||
1289 |
/** |
|
1290 |
* Return true if applet is targeted to JDK 1.1. |
|
1291 |
*/ |
|
1292 |
protected boolean isJDK11Applet() { |
|
1293 |
return jdk11Applet; |
|
1294 |
} |
|
1295 |
||
1296 |
/** |
|
1297 |
* Return true if applet is targeted to JDK1.2. |
|
1298 |
*/ |
|
1299 |
protected boolean isJDK12Applet() { |
|
1300 |
return jdk12Applet; |
|
1301 |
} |
|
1302 |
||
1303 |
/** |
|
1304 |
* Read short from byte array. |
|
1305 |
*/ |
|
1306 |
private int readShort(byte[] b, int off) { |
|
1307 |
int hi = readByte(b[off]); |
|
1308 |
int lo = readByte(b[off + 1]); |
|
1309 |
return (hi << 8) | lo; |
|
1310 |
} |
|
1311 |
||
1312 |
private int readByte(byte b) { |
|
1313 |
return ((int)b) & 0xFF; |
|
1314 |
} |
|
1315 |
||
1316 |
||
1317 |
private static AppletMessageHandler amh = new AppletMessageHandler("appletpanel"); |
|
1318 |
} |