workbench/WorkbenchUiPlugin.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.cms.ui.workbench;
  17
  18 import java.io.IOException;
  19 import java.util.ResourceBundle;
  20
  21 import javax.security.auth.callback.Callback;
  22 import javax.security.auth.callback.CallbackHandler;
  23 import javax.security.auth.callback.UnsupportedCallbackException;
  24
  25 import org.apache.commons.logging.Log;
  26 import org.apache.commons.logging.LogFactory;
  27 import org.argeo.cms.CmsException;
  28 import org.argeo.cms.widgets.auth.DefaultLoginDialog;
  29 import org.eclipse.core.runtime.ILogListener;
  30 import org.eclipse.core.runtime.IStatus;
  31 import org.eclipse.core.runtime.Platform;
  32 import org.eclipse.jface.resource.ImageDescriptor;
  33 import org.eclipse.swt.widgets.Display;
  34 import org.eclipse.ui.plugin.AbstractUIPlugin;
  35 import org.osgi.framework.BundleContext;
  36 import org.osgi.framework.ServiceRegistration;
  37
  38 /** The activator class controls the plug-in life cycle */
  39 public class WorkbenchUiPlugin extends AbstractUIPlugin implements ILogListener {
  40         private final static Log log = LogFactory.getLog(WorkbenchUiPlugin.class);
  41
  42         // The plug-in ID
  43         public final static String PLUGIN_ID = "org.argeo.cms.ui.workbench"; //$NON-NLS-1$
  44
  45         private ResourceBundle messages;
  46         private static BundleContext bundleContext;
  47
  48         public static InheritableThreadLocal<Display> display = new InheritableThreadLocal<Display>() {
  49
  50                 @Override
  51                 protected Display initialValue() {
  52                         return Display.getCurrent();
  53                 }
  54         };
  55
  56
  57         final static String CONTEXT_KEYRING = "KEYRING";
  58
  59         private CallbackHandler defaultCallbackHandler;
  60         private ServiceRegistration<CallbackHandler> defaultCallbackHandlerReg;
  61
  62         // The shared instance
  63         private static WorkbenchUiPlugin plugin;
  64
  65         public void start(BundleContext context) throws Exception {
  66                 super.start(context);
  67                 bundleContext = context;
  68                 defaultCallbackHandler = new DefaultCallbackHandler();
  69                 defaultCallbackHandlerReg = context.registerService(
  70                                 CallbackHandler.class, defaultCallbackHandler, null);
  71
  72                 plugin = this;
  73                 messages = ResourceBundle.getBundle(PLUGIN_ID + ".messages");
  74                 Platform.addLogListener(this);
  75                 if (log.isTraceEnabled())
  76                         log.trace("Eclipse logging now directed to standard logging");
  77         }
  78
  79         public void stop(BundleContext context) throws Exception {
  80                 bundleContext = null;
  81                 defaultCallbackHandlerReg.unregister();
  82         }
  83
  84         public static BundleContext getBundleContext() {
  85                 return bundleContext;
  86         }
  87
  88         /*
  89          * Returns the shared instance
  90          *
  91          * @return the shared instance
  92          */
  93         public static WorkbenchUiPlugin getDefault() {
  94                 return plugin;
  95         }
  96
  97         protected class DefaultCallbackHandler implements CallbackHandler {
  98                 public void handle(final Callback[] callbacks) throws IOException,
  99                                 UnsupportedCallbackException {
 100
 101                         // if (display != null) // RCP
 102                         Display displayToUse = display.get();
 103                         if (displayToUse == null)// RCP
 104                                 displayToUse = Display.getDefault();
 105                         displayToUse.syncExec(new Runnable() {
 106                                 public void run() {
 107                                         DefaultLoginDialog dialog = new DefaultLoginDialog(display
 108                                                         .get().getActiveShell());
 109                                         try {
 110                                                 dialog.handle(callbacks);
 111                                         } catch (IOException e) {
 112                                                 throw new CmsException("Cannot open dialog", e);
 113                                         }
 114                                 }
 115                         });
 116                         // else {// RAP
 117                         // DefaultLoginDialog dialog = new DefaultLoginDialog();
 118                         // dialog.handle(callbacks);
 119                         // }
 120                 }
 121
 122         }
 123
 124         public static ImageDescriptor getImageDescriptor(String path) {
 125                 return imageDescriptorFromPlugin(PLUGIN_ID, path);
 126         }
 127
 128         /** Returns the internationalized label for the given key */
 129         public static String getMessage(String key) {
 130                 try {
 131                         return getDefault().messages.getString(key);
 132                 } catch (NullPointerException npe) {
 133                         log.warn(key + " not found.");
 134                         return key;
 135                 }
 136         }
 137
 138         /**
 139          * Gives access to the internationalization message bundle. Returns null in
 140          * case this UiPlugin is not started (for JUnit tests, by instance)
 141          */
 142         public static ResourceBundle getMessagesBundle() {
 143                 if (getDefault() != null)
 144                         // To avoid NPE
 145                         return getDefault().messages;
 146                 else
 147                         return null;
 148         }
 149
 150         public void logging(IStatus status, String plugin) {
 151                 Log pluginLog = LogFactory.getLog(plugin);
 152                 Integer severity = status.getSeverity();
 153                 if (severity == IStatus.ERROR)
 154                         pluginLog.error(status.getMessage(), status.getException());
 155                 else if (severity == IStatus.WARNING)
 156                         pluginLog.warn(status.getMessage(), status.getException());
 157                 else if (severity == IStatus.INFO)
 158                         pluginLog.info(status.getMessage(), status.getException());
 159                 else if (severity == IStatus.CANCEL)
 160                         if (pluginLog.isDebugEnabled())
 161                                 pluginLog.debug(status.getMessage(), status.getException());
 162         }
 163 }