org.argeo.security.ui/src/org/argeo/security/ui/SecurityUiPlugin.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.security.ui;
  17
  18 import java.io.IOException;
  19
  20 import javax.security.auth.callback.Callback;
  21 import javax.security.auth.callback.CallbackHandler;
  22 import javax.security.auth.callback.UnsupportedCallbackException;
  23
  24 import org.argeo.ArgeoException;
  25 import org.argeo.security.ui.dialogs.DefaultLoginDialog;
  26 import org.eclipse.jface.resource.ImageDescriptor;
  27 import org.eclipse.swt.widgets.Display;
  28 import org.eclipse.ui.plugin.AbstractUIPlugin;
  29 import org.osgi.framework.BundleContext;
  30 import org.osgi.framework.ServiceRegistration;
  31
  32 /**
  33  * The activator class controls the plug-in life cycle
  34  */
  35 public class SecurityUiPlugin extends AbstractUIPlugin {
  36
  37         // The plug-in ID
  38         public static final String PLUGIN_ID = "org.argeo.security.ui"; //$NON-NLS-1$
  39
  40         public final static String CONTEXT_KEYRING = "KEYRING";
  41
  42         private CallbackHandler defaultCallbackHandler;
  43         private ServiceRegistration defaultCallbackHandlerReg;
  44
  45         private static SecurityUiPlugin plugin;
  46
  47         public static InheritableThreadLocal<Display> display = new InheritableThreadLocal<Display>() {
  48
  49                 @Override
  50                 protected Display initialValue() {
  51                         return Display.getCurrent();
  52                 }
  53         };
  54
  55         public void start(BundleContext context) throws Exception {
  56                 super.start(context);
  57                 plugin = this;
  58
  59                 defaultCallbackHandler = new DefaultCallbackHandler();
  60                 defaultCallbackHandlerReg = context.registerService(
  61                                 CallbackHandler.class.getName(), defaultCallbackHandler, null);
  62         }
  63
  64         public void stop(BundleContext context) throws Exception {
  65                 plugin = null;
  66                 defaultCallbackHandlerReg.unregister();
  67                 super.stop(context);
  68         }
  69
  70         /**
  71          * Returns the shared instance
  72          *
  73          * @return the shared instance
  74          */
  75         public static SecurityUiPlugin getDefault() {
  76                 return plugin;
  77         }
  78
  79         public static ImageDescriptor getImageDescriptor(String path) {
  80                 return imageDescriptorFromPlugin(PLUGIN_ID, path);
  81         }
  82
  83         protected class DefaultCallbackHandler implements CallbackHandler {
  84                 public void handle(final Callback[] callbacks) throws IOException,
  85                                 UnsupportedCallbackException {
  86
  87                         // if (display != null) // RCP
  88                         Display displayToUse = display.get();
  89                         if (displayToUse == null)// RCP
  90                                 displayToUse = Display.getDefault();
  91                         displayToUse.syncExec(new Runnable() {
  92                                 public void run() {
  93                                         DefaultLoginDialog dialog = new DefaultLoginDialog(display
  94                                                         .get().getActiveShell());
  95                                         try {
  96                                                 dialog.handle(callbacks);
  97                                         } catch (IOException e) {
  98                                                 throw new ArgeoException("Cannot open dialog", e);
  99                                         }
 100                                 }
 101                         });
 102                         // else {// RAP
 103                         // DefaultLoginDialog dialog = new DefaultLoginDialog();
 104                         // dialog.handle(callbacks);
 105                         // }
 106                 }
 107
 108         }
 109 }